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<div class="title">SPI DMA Driver<div class="ingroups"><a class="el" href="a00185.html">SPI: Serial Peripheral Interface Driver</a></div></div> </div>
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<a name="details" id="details"></a><h2 class="groupheader">Overview</h2>
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<p>This section describes the programming interface of the SPI DMA driver. </p>
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<table class="memberdecls">
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Files</h2></td></tr>
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<tr class="memitem:a00112"><td class="memItemLeft" align="right" valign="top">file  </td><td class="memItemRight" valign="bottom"><a class="el" href="a00112.html">fsl_spi_dma.h</a></td></tr>
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<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
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Data Structures</h2></td></tr>
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<tr class="memitem:a00227"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#a00227">spi_dma_handle_t</a></td></tr>
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<tr class="memdesc:a00227"><td class="mdescLeft"> </td><td class="mdescRight">SPI DMA transfer handle, users should not touch the content of the handle. <a href="a00044.html#a00227">More...</a><br/></td></tr>
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<tr class="separator:a00227"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
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Typedefs</h2></td></tr>
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<tr class="memitem:ga72ce9db8c2a57d66c7b508ca7891f4b3"><td class="memItemLeft" align="right" valign="top">typedef void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ga72ce9db8c2a57d66c7b508ca7891f4b3">spi_dma_callback_t</a> )(SPI_Type *base, spi_dma_handle_t *handle, <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> status, void *userData)</td></tr>
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<tr class="memdesc:ga72ce9db8c2a57d66c7b508ca7891f4b3"><td class="mdescLeft"> </td><td class="mdescRight">SPI DMA callback called at the end of transfer. <a href="#ga72ce9db8c2a57d66c7b508ca7891f4b3">More...</a><br/></td></tr>
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<tr class="separator:ga72ce9db8c2a57d66c7b508ca7891f4b3"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="member-group"></a>
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Driver version</h2></td></tr>
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<tr class="memitem:gab72873a3a11fc293023558be553de43c"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#gab72873a3a11fc293023558be553de43c">FSL_SPI_DMA_DRIVER_VERSION</a>   (<a class="el" href="a00017.html#ga812138aa3315b0c6953c1a26130bcc37">MAKE_VERSION</a>(2, 1, 2))</td></tr>
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<tr class="memdesc:gab72873a3a11fc293023558be553de43c"><td class="mdescLeft"> </td><td class="mdescRight">SPI DMA driver version 2.1.1. <a href="#gab72873a3a11fc293023558be553de43c">More...</a><br/></td></tr>
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<tr class="separator:gab72873a3a11fc293023558be553de43c"><td class="memSeparator" colspan="2"> </td></tr>
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</table><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="member-group"></a>
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DMA Transactional</h2></td></tr>
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<tr class="memitem:gae8aa0229e688aa1b88185d5e9e7bf0b8"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#gae8aa0229e688aa1b88185d5e9e7bf0b8">SPI_MasterTransferCreateHandleDMA</a> (SPI_Type *base, spi_dma_handle_t *handle, <a class="el" href="a00044.html#ga72ce9db8c2a57d66c7b508ca7891f4b3">spi_dma_callback_t</a> callback, void *userData, <a class="el" href="a00016.html#a00250">dma_handle_t</a> *txHandle, <a class="el" href="a00016.html#a00250">dma_handle_t</a> *rxHandle)</td></tr>
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<tr class="memdesc:gae8aa0229e688aa1b88185d5e9e7bf0b8"><td class="mdescLeft"> </td><td class="mdescRight">Initialize the SPI master DMA handle. <a href="#gae8aa0229e688aa1b88185d5e9e7bf0b8">More...</a><br/></td></tr>
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<tr class="separator:gae8aa0229e688aa1b88185d5e9e7bf0b8"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga2bcf43f1d6908810b6b41d2d87bda3a9"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ga2bcf43f1d6908810b6b41d2d87bda3a9">SPI_MasterTransferDMA</a> (SPI_Type *base, spi_dma_handle_t *handle, <a class="el" href="a00043.html#a00313">spi_transfer_t</a> *xfer)</td></tr>
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<tr class="memdesc:ga2bcf43f1d6908810b6b41d2d87bda3a9"><td class="mdescLeft"> </td><td class="mdescRight">Perform a non-blocking SPI transfer using DMA. <a href="#ga2bcf43f1d6908810b6b41d2d87bda3a9">More...</a><br/></td></tr>
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<tr class="separator:ga2bcf43f1d6908810b6b41d2d87bda3a9"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga761647975e2cfffca46793a6723ffd95"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ga761647975e2cfffca46793a6723ffd95">SPI_MasterHalfDuplexTransferDMA</a> (SPI_Type *base, spi_dma_handle_t *handle, <a class="el" href="a00043.html#a00309">spi_half_duplex_transfer_t</a> *xfer)</td></tr>
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<tr class="memdesc:ga761647975e2cfffca46793a6723ffd95"><td class="mdescLeft"> </td><td class="mdescRight">Transfers a block of data using a DMA method. <a href="#ga761647975e2cfffca46793a6723ffd95">More...</a><br/></td></tr>
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<tr class="separator:ga761647975e2cfffca46793a6723ffd95"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga029df430a54021c536661fd17b9c60bb"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ga029df430a54021c536661fd17b9c60bb">SPI_SlaveTransferCreateHandleDMA</a> (SPI_Type *base, spi_dma_handle_t *handle, <a class="el" href="a00044.html#ga72ce9db8c2a57d66c7b508ca7891f4b3">spi_dma_callback_t</a> callback, void *userData, <a class="el" href="a00016.html#a00250">dma_handle_t</a> *txHandle, <a class="el" href="a00016.html#a00250">dma_handle_t</a> *rxHandle)</td></tr>
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<tr class="memdesc:ga029df430a54021c536661fd17b9c60bb"><td class="mdescLeft"> </td><td class="mdescRight">Initialize the SPI slave DMA handle. <a href="#ga029df430a54021c536661fd17b9c60bb">More...</a><br/></td></tr>
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<tr class="separator:ga029df430a54021c536661fd17b9c60bb"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga6848a2579e3e84d48123407448df60ed"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ga6848a2579e3e84d48123407448df60ed">SPI_SlaveTransferDMA</a> (SPI_Type *base, spi_dma_handle_t *handle, <a class="el" href="a00043.html#a00313">spi_transfer_t</a> *xfer)</td></tr>
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<tr class="memdesc:ga6848a2579e3e84d48123407448df60ed"><td class="mdescLeft"> </td><td class="mdescRight">Perform a non-blocking SPI transfer using DMA. <a href="#ga6848a2579e3e84d48123407448df60ed">More...</a><br/></td></tr>
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<tr class="separator:ga6848a2579e3e84d48123407448df60ed"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gac5f2aabca472a57709db2ef153e031c8"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#gac5f2aabca472a57709db2ef153e031c8">SPI_MasterTransferAbortDMA</a> (SPI_Type *base, spi_dma_handle_t *handle)</td></tr>
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<tr class="memdesc:gac5f2aabca472a57709db2ef153e031c8"><td class="mdescLeft"> </td><td class="mdescRight">Abort a SPI transfer using DMA. <a href="#gac5f2aabca472a57709db2ef153e031c8">More...</a><br/></td></tr>
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<tr class="separator:gac5f2aabca472a57709db2ef153e031c8"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga642d1fe963b7f1c28e5d8f4dd5b92861"><td class="memItemLeft" align="right" valign="top"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ga642d1fe963b7f1c28e5d8f4dd5b92861">SPI_MasterTransferGetCountDMA</a> (SPI_Type *base, spi_dma_handle_t *handle, size_t *count)</td></tr>
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<tr class="memdesc:ga642d1fe963b7f1c28e5d8f4dd5b92861"><td class="mdescLeft"> </td><td class="mdescRight">Gets the master DMA transfer remaining bytes. <a href="#ga642d1fe963b7f1c28e5d8f4dd5b92861">More...</a><br/></td></tr>
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<tr class="separator:ga642d1fe963b7f1c28e5d8f4dd5b92861"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ga03ab24789dc4c2438a5daff733ce2cfe"><td class="memItemLeft" align="right" valign="top">static void </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ga03ab24789dc4c2438a5daff733ce2cfe">SPI_SlaveTransferAbortDMA</a> (SPI_Type *base, spi_dma_handle_t *handle)</td></tr>
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<tr class="memdesc:ga03ab24789dc4c2438a5daff733ce2cfe"><td class="mdescLeft"> </td><td class="mdescRight">Abort a SPI transfer using DMA. <a href="#ga03ab24789dc4c2438a5daff733ce2cfe">More...</a><br/></td></tr>
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<tr class="separator:ga03ab24789dc4c2438a5daff733ce2cfe"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:gafa44608920f3653a4692f87f4d4220cc"><td class="memItemLeft" align="right" valign="top">static <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#gafa44608920f3653a4692f87f4d4220cc">SPI_SlaveTransferGetCountDMA</a> (SPI_Type *base, spi_dma_handle_t *handle, size_t *count)</td></tr>
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<tr class="memdesc:gafa44608920f3653a4692f87f4d4220cc"><td class="mdescLeft"> </td><td class="mdescRight">Gets the slave DMA transfer remaining bytes. <a href="#gafa44608920f3653a4692f87f4d4220cc">More...</a><br/></td></tr>
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<tr class="separator:gafa44608920f3653a4692f87f4d4220cc"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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<hr/><h2 class="groupheader">Data Structure Documentation</h2>
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<a name="a00227" id="a00227"></a>
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<td class="memname">struct _spi_dma_handle</td>
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</div><div class="memdoc">
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<div class="textblock"></div><table class="memberdecls">
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<tr><td colspan="2"><h3>Data Fields</h3></td></tr>
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<tr class="memitem:aaabe40c6b90d200b13e68ac7217fff22"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="aaabe40c6b90d200b13e68ac7217fff22"></a>
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volatile bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#aaabe40c6b90d200b13e68ac7217fff22">txInProgress</a></td></tr>
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<tr class="memdesc:aaabe40c6b90d200b13e68ac7217fff22"><td class="mdescLeft"> </td><td class="mdescRight">Send transfer finished. <br/></td></tr>
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<tr class="memitem:a685da0814b5b3310007a857d5def7bfb"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a685da0814b5b3310007a857d5def7bfb"></a>
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volatile bool </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#a685da0814b5b3310007a857d5def7bfb">rxInProgress</a></td></tr>
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<tr class="memdesc:a685da0814b5b3310007a857d5def7bfb"><td class="mdescLeft"> </td><td class="mdescRight">Receive transfer finished. <br/></td></tr>
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<tr class="memitem:ac1c68e2b431fe999805c73a98e147a2f"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ac1c68e2b431fe999805c73a98e147a2f"></a>
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<a class="el" href="a00016.html#a00250">dma_handle_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ac1c68e2b431fe999805c73a98e147a2f">txHandle</a></td></tr>
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<tr class="memdesc:ac1c68e2b431fe999805c73a98e147a2f"><td class="mdescLeft"> </td><td class="mdescRight">DMA handler for SPI send. <br/></td></tr>
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<tr class="memitem:af8324f0ace75610fa4cba54f669b58f6"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af8324f0ace75610fa4cba54f669b58f6"></a>
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<a class="el" href="a00016.html#a00250">dma_handle_t</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#af8324f0ace75610fa4cba54f669b58f6">rxHandle</a></td></tr>
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<tr class="memdesc:af8324f0ace75610fa4cba54f669b58f6"><td class="mdescLeft"> </td><td class="mdescRight">DMA handler for SPI receive. <br/></td></tr>
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<tr class="memitem:ab83d82c084cba678e9ddb1135f89c29c"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab83d82c084cba678e9ddb1135f89c29c"></a>
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uint8_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ab83d82c084cba678e9ddb1135f89c29c">bytesPerFrame</a></td></tr>
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<tr class="memdesc:ab83d82c084cba678e9ddb1135f89c29c"><td class="mdescLeft"> </td><td class="mdescRight">Bytes in a frame for SPI transfer. <br/></td></tr>
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<tr class="separator:ab83d82c084cba678e9ddb1135f89c29c"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a7dfc927b068cc0548da543dacfa34c3f"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a7dfc927b068cc0548da543dacfa34c3f"></a>
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<a class="el" href="a00044.html#ga72ce9db8c2a57d66c7b508ca7891f4b3">spi_dma_callback_t</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#a7dfc927b068cc0548da543dacfa34c3f">callback</a></td></tr>
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<tr class="memdesc:a7dfc927b068cc0548da543dacfa34c3f"><td class="mdescLeft"> </td><td class="mdescRight">Callback for SPI DMA transfer. <br/></td></tr>
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<tr class="separator:a7dfc927b068cc0548da543dacfa34c3f"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ad12378e2c097e3b73171f1935e8b68c7"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ad12378e2c097e3b73171f1935e8b68c7"></a>
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void * </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ad12378e2c097e3b73171f1935e8b68c7">userData</a></td></tr>
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<tr class="memdesc:ad12378e2c097e3b73171f1935e8b68c7"><td class="mdescLeft"> </td><td class="mdescRight">User Data for SPI DMA callback. <br/></td></tr>
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<tr class="separator:ad12378e2c097e3b73171f1935e8b68c7"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:ae11863ad60c9260044f4d07475612497"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ae11863ad60c9260044f4d07475612497"></a>
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uint32_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#ae11863ad60c9260044f4d07475612497">state</a></td></tr>
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<tr class="memdesc:ae11863ad60c9260044f4d07475612497"><td class="mdescLeft"> </td><td class="mdescRight">Internal state of SPI DMA transfer. <br/></td></tr>
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<tr class="separator:ae11863ad60c9260044f4d07475612497"><td class="memSeparator" colspan="2"> </td></tr>
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<tr class="memitem:a15d678e91bfd1af80576ca0a6b107c74"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a15d678e91bfd1af80576ca0a6b107c74"></a>
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size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="a00044.html#a15d678e91bfd1af80576ca0a6b107c74">transferSize</a></td></tr>
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<tr class="memdesc:a15d678e91bfd1af80576ca0a6b107c74"><td class="mdescLeft"> </td><td class="mdescRight">Bytes need to be transfer. <br/></td></tr>
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<tr class="separator:a15d678e91bfd1af80576ca0a6b107c74"><td class="memSeparator" colspan="2"> </td></tr>
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</table>
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</div>
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</div>
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<h2 class="groupheader">Macro Definition Documentation</h2>
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<a class="anchor" id="gab72873a3a11fc293023558be553de43c"></a>
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<td class="memname">#define FSL_SPI_DMA_DRIVER_VERSION   (<a class="el" href="a00017.html#ga812138aa3315b0c6953c1a26130bcc37">MAKE_VERSION</a>(2, 1, 2))</td>
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</div><div class="memdoc">
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</div>
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<h2 class="groupheader">Typedef Documentation</h2>
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<a class="anchor" id="ga72ce9db8c2a57d66c7b508ca7891f4b3"></a>
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<td class="memname">typedef void(* spi_dma_callback_t)(SPI_Type *base, spi_dma_handle_t *handle, <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> status, void *userData)</td>
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</div><div class="memdoc">
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<h2 class="groupheader">Function Documentation</h2>
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<a class="anchor" id="gae8aa0229e688aa1b88185d5e9e7bf0b8"></a>
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<td class="memname"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> SPI_MasterTransferCreateHandleDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
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<td class="paramname"><em>handle</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00044.html#ga72ce9db8c2a57d66c7b508ca7891f4b3">spi_dma_callback_t</a> </td>
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<td class="paramname"><em>callback</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>userData</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00016.html#a00250">dma_handle_t</a> * </td>
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<td class="paramname"><em>txHandle</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00016.html#a00250">dma_handle_t</a> * </td>
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<td class="paramname"><em>rxHandle</em> </td>
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<td></td>
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<td>)</td>
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<p>This function initializes the SPI master DMA handle which can be used for other SPI master transactional APIs. Usually, for a specified SPI instance, user need only call this API once to get the initialized handle.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
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<tr><td class="paramname">handle</td><td>SPI handle pointer. </td></tr>
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<tr><td class="paramname">callback</td><td>User callback function called at the end of a transfer. </td></tr>
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<tr><td class="paramname">userData</td><td>User data for callback. </td></tr>
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<tr><td class="paramname">txHandle</td><td>DMA handle pointer for SPI Tx, the handle shall be static allocated by users. </td></tr>
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<tr><td class="paramname">rxHandle</td><td>DMA handle pointer for SPI Rx, the handle shall be static allocated by users. </td></tr>
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</table>
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</dd>
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</dl>
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<td class="memname"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> SPI_MasterTransferDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
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<td class="paramname"><em>handle</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00043.html#a00313">spi_transfer_t</a> * </td>
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<td class="paramname"><em>xfer</em> </td>
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</tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</div><div class="memdoc">
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<dl class="section note"><dt>Note</dt><dd>This interface returned immediately after transfer initiates, users should call SPI_GetTransferStatus to poll the transfer status to check whether SPI transfer finished.</dd></dl>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
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<tr><td class="paramname">handle</td><td>SPI DMA handle pointer. </td></tr>
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<tr><td class="paramname">xfer</td><td>Pointer to dma transfer structure. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="retval"><dt>Return values</dt><dd>
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<table class="retval">
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<tr><td class="paramname">kStatus_Success</td><td>Successfully start a transfer. </td></tr>
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<tr><td class="paramname">kStatus_InvalidArgument</td><td>Input argument is invalid. </td></tr>
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<tr><td class="paramname">kStatus_SPI_Busy</td><td>SPI is not idle, is running another transfer. </td></tr>
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</table>
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</dd>
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</dl>
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<td class="memname"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> SPI_MasterHalfDuplexTransferDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
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<td class="paramname"><em>handle</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00043.html#a00309">spi_half_duplex_transfer_t</a> * </td>
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<td class="paramname"><em>xfer</em> </td>
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</tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</div><div class="memdoc">
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<p>This function using polling way to do the first half transimission and using DMA way to do the srcond half transimission, the transfer mechanism is half-duplex. When do the second half transimission, code will return right away. When all data is transferred, the callback function is called.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">base</td><td>SPI base pointer </td></tr>
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<tr><td class="paramname">handle</td><td>A pointer to the spi_master_dma_handle_t structure which stores the transfer state. </td></tr>
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<tr><td class="paramname">xfer</td><td>A pointer to the <a class="el" href="a00043.html#a00309" title="SPI half-duplex(master only) transfer structure. ">spi_half_duplex_transfer_t</a> structure. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>status of status_t. </dd></dl>
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<td class="memname">static <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> SPI_SlaveTransferCreateHandleDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
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<td class="paramname"><em>handle</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00044.html#ga72ce9db8c2a57d66c7b508ca7891f4b3">spi_dma_callback_t</a> </td>
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<td class="paramname"><em>callback</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">void * </td>
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<td class="paramname"><em>userData</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00016.html#a00250">dma_handle_t</a> * </td>
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<td class="paramname"><em>txHandle</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00016.html#a00250">dma_handle_t</a> * </td>
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<td class="paramname"><em>rxHandle</em> </td>
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<td></td>
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<td>)</td>
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</td>
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</div><div class="memdoc">
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<p>This function initializes the SPI slave DMA handle which can be used for other SPI master transactional APIs. Usually, for a specified SPI instance, user need only call this API once to get the initialized handle.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
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<tr><td class="paramname">handle</td><td>SPI handle pointer. </td></tr>
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<tr><td class="paramname">callback</td><td>User callback function called at the end of a transfer. </td></tr>
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<tr><td class="paramname">userData</td><td>User data for callback. </td></tr>
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<tr><td class="paramname">txHandle</td><td>DMA handle pointer for SPI Tx, the handle shall be static allocated by users. </td></tr>
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<tr><td class="paramname">rxHandle</td><td>DMA handle pointer for SPI Rx, the handle shall be static allocated by users. </td></tr>
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</table>
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</dd>
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</dl>
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<td class="memname">static <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> SPI_SlaveTransferDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
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<td class="paramname"><em>handle</em>, </td>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype"><a class="el" href="a00043.html#a00313">spi_transfer_t</a> * </td>
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<td class="paramname"><em>xfer</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</table>
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</div><div class="memdoc">
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<dl class="section note"><dt>Note</dt><dd>This interface returned immediately after transfer initiates, users should call SPI_GetTransferStatus to poll the transfer status to check whether SPI transfer finished.</dd></dl>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
|
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<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
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<tr><td class="paramname">handle</td><td>SPI DMA handle pointer. </td></tr>
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<tr><td class="paramname">xfer</td><td>Pointer to dma transfer structure. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="retval"><dt>Return values</dt><dd>
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<table class="retval">
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<tr><td class="paramname">kStatus_Success</td><td>Successfully start a transfer. </td></tr>
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<tr><td class="paramname">kStatus_InvalidArgument</td><td>Input argument is invalid. </td></tr>
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<tr><td class="paramname">kStatus_SPI_Busy</td><td>SPI is not idle, is running another transfer. </td></tr>
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</table>
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</dd>
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</dl>
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<td class="memname">void SPI_MasterTransferAbortDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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</tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
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<td class="paramname"><em>handle</em> </td>
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<td></td>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
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<tr><td class="paramname">handle</td><td>SPI DMA handle pointer. </td></tr>
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</table>
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</dd>
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</dl>
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</div>
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</div>
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<a class="anchor" id="ga642d1fe963b7f1c28e5d8f4dd5b92861"></a>
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<div class="memitem">
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<td class="memname"><a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> SPI_MasterTransferGetCountDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
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<td class="paramname"><em>handle</em>, </td>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">size_t * </td>
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<td class="paramname"><em>count</em> </td>
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</tr>
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>This function gets the master DMA transfer remaining bytes.</p>
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
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<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
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<tr><td class="paramname">handle</td><td>A pointer to the spi_dma_handle_t structure which stores the transfer state. </td></tr>
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<tr><td class="paramname">count</td><td>A number of bytes transferred by the non-blocking transaction. </td></tr>
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</table>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>status of status_t. </dd></dl>
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</div>
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</div>
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<a class="anchor" id="ga03ab24789dc4c2438a5daff733ce2cfe"></a>
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<td class="mlabels-left">
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<table class="memname">
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<td class="memname">static void SPI_SlaveTransferAbortDMA </td>
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<td>(</td>
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<td class="paramtype">SPI_Type * </td>
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<td class="paramname"><em>base</em>, </td>
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</tr>
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<tr>
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<td class="paramkey"></td>
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<td></td>
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<td class="paramtype">spi_dma_handle_t * </td>
|
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<td class="paramname"><em>handle</em> </td>
|
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</tr>
|
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<tr>
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<td></td>
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<td>)</td>
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<td></td><td></td>
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</tr>
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</table>
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</tr>
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</table>
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</div><div class="memdoc">
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<dl class="params"><dt>Parameters</dt><dd>
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<table class="params">
|
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<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
|
|
<tr><td class="paramname">handle</td><td>SPI DMA handle pointer. </td></tr>
|
|
</table>
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</dd>
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</dl>
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</div>
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</div>
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<a class="anchor" id="gafa44608920f3653a4692f87f4d4220cc"></a>
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<div class="memitem">
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<div class="memproto">
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<table class="mlabels">
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<tr>
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<td class="mlabels-left">
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<table class="memname">
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<tr>
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<td class="memname">static <a class="el" href="a00178.html#gaaabdaf7ee58ca7269bd4bf24efcde092">status_t</a> SPI_SlaveTransferGetCountDMA </td>
|
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<td>(</td>
|
|
<td class="paramtype">SPI_Type * </td>
|
|
<td class="paramname"><em>base</em>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
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<td class="paramtype">spi_dma_handle_t * </td>
|
|
<td class="paramname"><em>handle</em>, </td>
|
|
</tr>
|
|
<tr>
|
|
<td class="paramkey"></td>
|
|
<td></td>
|
|
<td class="paramtype">size_t * </td>
|
|
<td class="paramname"><em>count</em> </td>
|
|
</tr>
|
|
<tr>
|
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<td></td>
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<td>)</td>
|
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<td></td><td></td>
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</tr>
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</table>
|
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</td>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">inline</span><span class="mlabel">static</span></span> </td>
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</tr>
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</table>
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</div><div class="memdoc">
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<p>This function gets the slave DMA transfer remaining bytes.</p>
|
|
<dl class="params"><dt>Parameters</dt><dd>
|
|
<table class="params">
|
|
<tr><td class="paramname">base</td><td>SPI peripheral base address. </td></tr>
|
|
<tr><td class="paramname">handle</td><td>A pointer to the spi_dma_handle_t structure which stores the transfer state. </td></tr>
|
|
<tr><td class="paramname">count</td><td>A number of bytes transferred by the non-blocking transaction. </td></tr>
|
|
</table>
|
|
</dd>
|
|
</dl>
|
|
<dl class="section return"><dt>Returns</dt><dd>status of status_t. </dd></dl>
|
|
|
|
</div>
|
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</div>
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