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  < span id = "projectnumber" > Rev 2.12.0< / span >
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< div class = "title" > SPI DMA Driver< div class = "ingroups" > < a class = "el" href = "a00204.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 >
< p > This section describes the programming interface of the SPI DMA driver. < / p >
< table class = "memberdecls" >
< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "files" > < / a >
Files< / h2 > < / td > < / tr >
< tr class = "memitem:a00126" > < td class = "memItemLeft" align = "right" valign = "top" > file   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00126.html" > fsl_spi_dma.h< / a > < / td > < / tr >
< tr class = "separator:" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
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Data Structures< / h2 > < / td > < / tr >
< tr class = "memitem:a00248" > < td class = "memItemLeft" align = "right" valign = "top" > struct   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#a00248" > spi_dma_handle_t< / a > < / td > < / tr >
< tr class = "memdesc:a00248" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > SPI DMA transfer handle, users should not touch the content of the handle. < a href = "a00051.html#a00248" > More...< / a > < br / > < / td > < / tr >
< tr class = "separator:a00248" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table > < table class = "memberdecls" >
< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "typedef-members" > < / a >
Typedefs< / h2 > < / td > < / tr >
< tr class = "memitem:ga72ce9db8c2a57d66c7b508ca7891f4b3" > < td class = "memItemLeft" align = "right" valign = "top" > typedef void(*  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ga72ce9db8c2a57d66c7b508ca7891f4b3" > spi_dma_callback_t< / a > )(SPI_Type *base, spi_dma_handle_t *handle, < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > status, void *userData)< / td > < / tr >
< 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 >
< tr class = "separator:ga72ce9db8c2a57d66c7b508ca7891f4b3" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table > < table class = "memberdecls" >
< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "member-group" > < / a >
Driver version< / h2 > < / td > < / tr >
< tr class = "memitem:gab72873a3a11fc293023558be553de43c" > < td class = "memItemLeft" align = "right" valign = "top" > #define  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#gab72873a3a11fc293023558be553de43c" > FSL_SPI_DMA_DRIVER_VERSION< / a >       (< a class = "el" href = "a00017.html#ga812138aa3315b0c6953c1a26130bcc37" > MAKE_VERSION< / a > (2, 1, 2))< / td > < / tr >
< 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 >
< tr class = "separator:gab72873a3a11fc293023558be553de43c" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table > < table class = "memberdecls" >
< tr class = "heading" > < td colspan = "2" > < h2 class = "groupheader" > < a name = "member-group" > < / a >
DMA Transactional< / h2 > < / td > < / tr >
< tr class = "memitem:gae8aa0229e688aa1b88185d5e9e7bf0b8" > < td class = "memItemLeft" align = "right" valign = "top" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#gae8aa0229e688aa1b88185d5e9e7bf0b8" > SPI_MasterTransferCreateHandleDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle, < a class = "el" href = "a00051.html#ga72ce9db8c2a57d66c7b508ca7891f4b3" > spi_dma_callback_t< / a > callback, void *userData, < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *txHandle, < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *rxHandle)< / td > < / tr >
< 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 >
< tr class = "separator:gae8aa0229e688aa1b88185d5e9e7bf0b8" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga2bcf43f1d6908810b6b41d2d87bda3a9" > < td class = "memItemLeft" align = "right" valign = "top" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ga2bcf43f1d6908810b6b41d2d87bda3a9" > SPI_MasterTransferDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle, < a class = "el" href = "a00050.html#a00360" > spi_transfer_t< / a > *xfer)< / td > < / tr >
< 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 >
< tr class = "separator:ga2bcf43f1d6908810b6b41d2d87bda3a9" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga761647975e2cfffca46793a6723ffd95" > < td class = "memItemLeft" align = "right" valign = "top" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ga761647975e2cfffca46793a6723ffd95" > SPI_MasterHalfDuplexTransferDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle, < a class = "el" href = "a00050.html#a00356" > spi_half_duplex_transfer_t< / a > *xfer)< / td > < / tr >
< 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 >
< tr class = "separator:ga761647975e2cfffca46793a6723ffd95" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga029df430a54021c536661fd17b9c60bb" > < td class = "memItemLeft" align = "right" valign = "top" > static < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ga029df430a54021c536661fd17b9c60bb" > SPI_SlaveTransferCreateHandleDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle, < a class = "el" href = "a00051.html#ga72ce9db8c2a57d66c7b508ca7891f4b3" > spi_dma_callback_t< / a > callback, void *userData, < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *txHandle, < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *rxHandle)< / td > < / tr >
< 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 >
< tr class = "separator:ga029df430a54021c536661fd17b9c60bb" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga6848a2579e3e84d48123407448df60ed" > < td class = "memItemLeft" align = "right" valign = "top" > static < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ga6848a2579e3e84d48123407448df60ed" > SPI_SlaveTransferDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle, < a class = "el" href = "a00050.html#a00360" > spi_transfer_t< / a > *xfer)< / td > < / tr >
< 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 >
< tr class = "separator:ga6848a2579e3e84d48123407448df60ed" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:gac5f2aabca472a57709db2ef153e031c8" > < td class = "memItemLeft" align = "right" valign = "top" > void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#gac5f2aabca472a57709db2ef153e031c8" > SPI_MasterTransferAbortDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle)< / td > < / tr >
< 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 >
< tr class = "separator:gac5f2aabca472a57709db2ef153e031c8" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga642d1fe963b7f1c28e5d8f4dd5b92861" > < td class = "memItemLeft" align = "right" valign = "top" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ga642d1fe963b7f1c28e5d8f4dd5b92861" > SPI_MasterTransferGetCountDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle, size_t *count)< / td > < / tr >
< 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 >
< tr class = "separator:ga642d1fe963b7f1c28e5d8f4dd5b92861" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ga03ab24789dc4c2438a5daff733ce2cfe" > < td class = "memItemLeft" align = "right" valign = "top" > static void  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ga03ab24789dc4c2438a5daff733ce2cfe" > SPI_SlaveTransferAbortDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle)< / td > < / tr >
< 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 >
< tr class = "separator:ga03ab24789dc4c2438a5daff733ce2cfe" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:gafa44608920f3653a4692f87f4d4220cc" > < td class = "memItemLeft" align = "right" valign = "top" > static < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#gafa44608920f3653a4692f87f4d4220cc" > SPI_SlaveTransferGetCountDMA< / a > (SPI_Type *base, spi_dma_handle_t *handle, size_t *count)< / td > < / tr >
< 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 >
< tr class = "separator:gafa44608920f3653a4692f87f4d4220cc" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< / table >
< hr / > < h2 class = "groupheader" > Data Structure Documentation< / h2 >
< a name = "a00248" id = "a00248" > < / a >
< div class = "memitem" >
< div class = "memproto" >
< table class = "memname" >
< tr >
< td class = "memname" > struct _spi_dma_handle< / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< div class = "textblock" > < / div > < table class = "memberdecls" >
< tr > < td colspan = "2" > < h3 > Data Fields< / h3 > < / td > < / tr >
< tr class = "memitem:aaabe40c6b90d200b13e68ac7217fff22" > < td class = "memItemLeft" align = "right" valign = "top" > < a class = "anchor" id = "aaabe40c6b90d200b13e68ac7217fff22" > < / a >
volatile bool  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#aaabe40c6b90d200b13e68ac7217fff22" > txInProgress< / a > < / td > < / tr >
< tr class = "memdesc:aaabe40c6b90d200b13e68ac7217fff22" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Send transfer finished. < br / > < / td > < / tr >
< tr class = "separator:aaabe40c6b90d200b13e68ac7217fff22" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:a685da0814b5b3310007a857d5def7bfb" > < td class = "memItemLeft" align = "right" valign = "top" > < a class = "anchor" id = "a685da0814b5b3310007a857d5def7bfb" > < / a >
volatile bool  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#a685da0814b5b3310007a857d5def7bfb" > rxInProgress< / a > < / td > < / tr >
< tr class = "memdesc:a685da0814b5b3310007a857d5def7bfb" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Receive transfer finished. < br / > < / td > < / tr >
< tr class = "separator:a685da0814b5b3310007a857d5def7bfb" > < td class = "memSeparator" colspan = "2" >   < / td > < / tr >
< tr class = "memitem:ac1c68e2b431fe999805c73a98e147a2f" > < td class = "memItemLeft" align = "right" valign = "top" > < a class = "anchor" id = "ac1c68e2b431fe999805c73a98e147a2f" > < / a >
< a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ac1c68e2b431fe999805c73a98e147a2f" > txHandle< / a > < / td > < / tr >
< tr class = "memdesc:ac1c68e2b431fe999805c73a98e147a2f" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > DMA handler for SPI send. < br / > < / td > < / tr >
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< a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#af8324f0ace75610fa4cba54f669b58f6" > rxHandle< / a > < / td > < / tr >
< tr class = "memdesc:af8324f0ace75610fa4cba54f669b58f6" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > DMA handler for SPI receive. < br / > < / td > < / tr >
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uint8_t  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ab83d82c084cba678e9ddb1135f89c29c" > bytesPerFrame< / a > < / td > < / tr >
< 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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< a class = "el" href = "a00051.html#ga72ce9db8c2a57d66c7b508ca7891f4b3" > spi_dma_callback_t< / a >   < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#a7dfc927b068cc0548da543dacfa34c3f" > callback< / a > < / td > < / tr >
< tr class = "memdesc:a7dfc927b068cc0548da543dacfa34c3f" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Callback for SPI DMA transfer. < br / > < / td > < / tr >
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void *  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ad12378e2c097e3b73171f1935e8b68c7" > userData< / a > < / td > < / tr >
< tr class = "memdesc:ad12378e2c097e3b73171f1935e8b68c7" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > User Data for SPI DMA callback. < br / > < / td > < / tr >
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uint32_t  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#ae11863ad60c9260044f4d07475612497" > state< / a > < / td > < / tr >
< tr class = "memdesc:ae11863ad60c9260044f4d07475612497" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Internal state of SPI DMA transfer. < br / > < / td > < / tr >
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size_t  < / td > < td class = "memItemRight" valign = "bottom" > < a class = "el" href = "a00051.html#a15d678e91bfd1af80576ca0a6b107c74" > transferSize< / a > < / td > < / tr >
< tr class = "memdesc:a15d678e91bfd1af80576ca0a6b107c74" > < td class = "mdescLeft" >   < / td > < td class = "mdescRight" > Bytes need to be transfer. < br / > < / td > < / tr >
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< h2 class = "groupheader" > Macro Definition Documentation< / h2 >
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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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< h2 class = "groupheader" > Typedef Documentation< / h2 >
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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 = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > status, void *userData)< / td >
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< h2 class = "groupheader" > Function Documentation< / h2 >
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< td class = "memname" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > SPI_MasterTransferCreateHandleDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< 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" > < a class = "el" href = "a00051.html#ga72ce9db8c2a57d66c7b508ca7891f4b3" > spi_dma_callback_t< / a >   < / td >
< td class = "paramname" > < em > callback< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > userData< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *  < / td >
< td class = "paramname" > < em > txHandle< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *  < / td >
< td class = "paramname" > < em > rxHandle< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< 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 >
< 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 > SPI handle pointer. < / td > < / tr >
< tr > < td class = "paramname" > callback< / td > < td > User callback function called at the end of a transfer. < / td > < / tr >
< tr > < td class = "paramname" > userData< / td > < td > User data for callback. < / td > < / tr >
< tr > < td class = "paramname" > txHandle< / td > < td > DMA handle pointer for SPI Tx, the handle shall be static allocated by users. < / td > < / tr >
< tr > < td class = "paramname" > rxHandle< / td > < td > DMA handle pointer for SPI Rx, the handle shall be static allocated by users. < / td > < / tr >
< / table >
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< td class = "memname" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > SPI_MasterTransferDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< 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" > < a class = "el" href = "a00050.html#a00360" > spi_transfer_t< / a > *  < / td >
< td class = "paramname" > < em > xfer< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< / table >
< / div > < div class = "memdoc" >
< 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 >
< 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 > SPI DMA handle pointer. < / td > < / tr >
< tr > < td class = "paramname" > xfer< / td > < td > Pointer to dma transfer structure. < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "retval" > < dt > Return values< / dt > < dd >
< table class = "retval" >
< tr > < td class = "paramname" > kStatus_Success< / td > < td > Successfully start a transfer. < / td > < / tr >
< tr > < td class = "paramname" > kStatus_InvalidArgument< / td > < td > Input argument is invalid. < / td > < / tr >
< tr > < td class = "paramname" > kStatus_SPI_Busy< / td > < td > SPI is not idle, is running another transfer. < / td > < / tr >
< / table >
< / dd >
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< td class = "memname" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > SPI_MasterHalfDuplexTransferDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< 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" > < a class = "el" href = "a00050.html#a00356" > spi_half_duplex_transfer_t< / a > *  < / td >
< td class = "paramname" > < em > xfer< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< / div > < div class = "memdoc" >
< 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 >
< dl class = "params" > < dt > Parameters< / dt > < dd >
< table class = "params" >
< tr > < td class = "paramname" > base< / td > < td > SPI base pointer < / td > < / tr >
< tr > < td class = "paramname" > handle< / td > < td > A pointer to the spi_master_dma_handle_t structure which stores the transfer state. < / td > < / tr >
< tr > < td class = "paramname" > xfer< / td > < td > A pointer to the < a class = "el" href = "a00050.html#a00356" title = "SPI half-duplex(master only) transfer structure. " > spi_half_duplex_transfer_t< / a > structure. < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "section return" > < dt > Returns< / dt > < dd > status of status_t. < / dd > < / dl >
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< a class = "anchor" id = "ga029df430a54021c536661fd17b9c60bb" > < / a >
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< td class = "memname" > static < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > SPI_SlaveTransferCreateHandleDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > spi_dma_handle_t *  < / td >
< td class = "paramname" > < em > handle< / em > , < / td >
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< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > < a class = "el" href = "a00051.html#ga72ce9db8c2a57d66c7b508ca7891f4b3" > spi_dma_callback_t< / a >   < / td >
< td class = "paramname" > < em > callback< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > void *  < / td >
< td class = "paramname" > < em > userData< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *  < / td >
< td class = "paramname" > < em > txHandle< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > < a class = "el" href = "a00016.html#a00271" > dma_handle_t< / a > *  < / td >
< td class = "paramname" > < em > rxHandle< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< span class = "mlabels" > < span class = "mlabel" > inline< / span > < span class = "mlabel" > static< / span > < / span > < / td >
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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 >
< 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 > SPI handle pointer. < / td > < / tr >
< tr > < td class = "paramname" > callback< / td > < td > User callback function called at the end of a transfer. < / td > < / tr >
< tr > < td class = "paramname" > userData< / td > < td > User data for callback. < / td > < / tr >
< tr > < td class = "paramname" > txHandle< / td > < td > DMA handle pointer for SPI Tx, the handle shall be static allocated by users. < / td > < / tr >
< 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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< td class = "memname" > static < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > SPI_SlaveTransferDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< 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" > < a class = "el" href = "a00050.html#a00360" > spi_transfer_t< / a > *  < / td >
< td class = "paramname" > < em > xfer< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< span class = "mlabels" > < span class = "mlabel" > inline< / span > < span class = "mlabel" > static< / span > < / span > < / td >
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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 >
< 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 > SPI DMA handle pointer. < / td > < / tr >
< tr > < td class = "paramname" > xfer< / td > < td > Pointer to dma transfer structure. < / td > < / tr >
< / table >
< / dd >
< / dl >
< dl class = "retval" > < dt > Return values< / dt > < dd >
< table class = "retval" >
< tr > < td class = "paramname" > kStatus_Success< / td > < td > Successfully start a transfer. < / td > < / tr >
< tr > < td class = "paramname" > kStatus_InvalidArgument< / td > < td > Input argument is invalid. < / td > < / tr >
< tr > < td class = "paramname" > kStatus_SPI_Busy< / td > < td > SPI is not idle, is running another transfer. < / td > < / tr >
< / table >
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< a class = "anchor" id = "gac5f2aabca472a57709db2ef153e031c8" > < / a >
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< td class = "memname" > void SPI_MasterTransferAbortDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > spi_dma_handle_t *  < / td >
< td class = "paramname" > < em > handle< / em >   < / td >
< / tr >
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< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< 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 > SPI DMA handle pointer. < / td > < / tr >
< / table >
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< a class = "anchor" id = "ga642d1fe963b7f1c28e5d8f4dd5b92861" > < / a >
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< td class = "memname" > < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > SPI_MasterTransferGetCountDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< 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 >
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< td > )< / td >
< td > < / td > < td > < / td >
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< / div > < div class = "memdoc" >
< p > This function gets the master 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 >
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< table class = "mlabels" >
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< td class = "mlabels-left" >
< table class = "memname" >
< tr >
< td class = "memname" > static void SPI_SlaveTransferAbortDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< td class = "paramtype" > spi_dma_handle_t *  < / td >
< td class = "paramname" > < em > handle< / em >   < / td >
< / tr >
< tr >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< td class = "mlabels-right" >
< span class = "mlabels" > < span class = "mlabel" > inline< / span > < span class = "mlabel" > static< / span > < / span > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< 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 > SPI DMA handle pointer. < / td > < / tr >
< / table >
< / dd >
< / dl >
< / div >
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< a class = "anchor" id = "gafa44608920f3653a4692f87f4d4220cc" > < / a >
< div class = "memitem" >
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< table class = "mlabels" >
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< td class = "mlabels-left" >
< table class = "memname" >
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< td class = "memname" > static < a class = "el" href = "a00197.html#gaaabdaf7ee58ca7269bd4bf24efcde092" > status_t< / a > SPI_SlaveTransferGetCountDMA < / td >
< td > (< / td >
< td class = "paramtype" > SPI_Type *  < / td >
< td class = "paramname" > < em > base< / em > , < / td >
< / tr >
< tr >
< td class = "paramkey" > < / td >
< td > < / td >
< 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 >
< td > < / td >
< td > )< / td >
< td > < / td > < td > < / td >
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< / table >
< / td >
< td class = "mlabels-right" >
< span class = "mlabels" > < span class = "mlabel" > inline< / span > < span class = "mlabel" > static< / span > < / span > < / td >
< / tr >
< / table >
< / div > < div class = "memdoc" >
< 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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