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MCUXpresso_MIMXRT1052xxxxB/devices/MIMXRT1052/drivers/fsl_csi.c

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/*
* Copyright 2017-2021 NXP
* All rights reserved.
*
*
* SPDX-License-Identifier: BSD-3-Clause
*/
#include "fsl_csi.h"
#if CSI_DRIVER_FRAG_MODE
#include "fsl_cache.h"
#endif
#if defined(FSL_FEATURE_MEMORY_HAS_ADDRESS_OFFSET) && FSL_FEATURE_MEMORY_HAS_ADDRESS_OFFSET
#include "fsl_memory.h"
#endif
/*******************************************************************************
* Definitions
******************************************************************************/
/* Macro remap. */
#if (!defined(CSI_CR3_TWO_8BIT_SENSOR_MASK) && defined(CSI_CR3_SENSOR_16BITS_MASK))
#define CSI_CR3_TWO_8BIT_SENSOR_MASK CSI_CR3_SENSOR_16BITS_MASK
#endif
/* Component ID definition, used by tools. */
#ifndef FSL_COMPONENT_ID
#define FSL_COMPONENT_ID "platform.drivers.csi"
#endif
/* Two frame buffer loaded to CSI register at most. */
#define CSI_MAX_ACTIVE_FRAME_NUM 2U
/* CSI driver only support RGB565 and YUV422 in fragment mode, 2 bytes per pixel. */
#define CSI_FRAG_INPUT_BYTES_PER_PIXEL 2U
#if defined(FSL_FEATURE_MEMORY_HAS_ADDRESS_OFFSET) && FSL_FEATURE_MEMORY_HAS_ADDRESS_OFFSET
#define CSI_ADDR_CPU_2_IP(addr) (MEMORY_ConvertMemoryMapAddress((uint32_t)(addr), kMEMORY_Local2DMA))
#define CSI_ADDR_IP_2_CPU(addr) (MEMORY_ConvertMemoryMapAddress((uint32_t)(addr), kMEMORY_DMA2Local))
#else
#define CSI_ADDR_CPU_2_IP(addr) (addr)
#define CSI_ADDR_IP_2_CPU(addr) (addr)
#endif /* FSL_FEATURE_MEMORY_HAS_ADDRESS_OFFSET */
/*!
* @brief Used for conversion between `void*` and `uint32_t`.
*/
typedef union pvoid_to_u32
{
void *pvoid;
uint32_t u32;
} pvoid_to_u32_t;
/*******************************************************************************
* Prototypes
******************************************************************************/
/*!
* @brief Get the instance from the base address
*
* @param base CSI peripheral base address
*
* @return The CSI module instance
*/
static uint32_t CSI_GetInstance(CSI_Type *base);
#if !CSI_DRIVER_FRAG_MODE
/*!
* @brief Get the delta value of two index in queue.
*
* @param startIdx Start index.
* @param endIdx End index.
*
* @return The delta between startIdx and endIdx in queue.
*/
static uint8_t CSI_TransferGetQueueDelta(uint8_t startIdx, uint8_t endIdx);
/*!
* @brief Increase a index value in queue.
*
* This function increases the index value in the queue, if the index is out of
* the queue range, it is reset to 0.
*
* @param idx The index value to increase.
*
* @return The index value after increase.
*/
static uint8_t CSI_TransferIncreaseQueueIdx(uint8_t idx);
/*!
* @brief Get the empty frame buffer count in queue.
*
* @param base CSI peripheral base address
* @param handle Pointer to CSI driver handle.
*
* @return Number of the empty frame buffer count in queue.
*/
static uint32_t CSI_TransferGetEmptyBufferCount(csi_handle_t *handle);
/*!
* @brief Get the empty frame buffer.
*
* This function should only be called when frame buffer count larger than 0.
*
* @param handle Pointer to CSI driver handle.
*
* @return Empty buffer
*/
static uint32_t CSI_TransferGetEmptyBuffer(csi_handle_t *handle);
/*!
* @brief Put the empty frame buffer.
*
* @param handle Pointer to CSI driver handle.
* @param buffer The empty buffer to put.
*/
static void CSI_TransferPutEmptyBuffer(csi_handle_t *handle, uint32_t buffer);
/*!
* @brief Get the RX frame buffer address.
*
* @param base CSI peripheral base address.
* @param index Buffer index.
* @return Frame buffer address.
*/
static uint32_t CSI_GetRxBufferAddr(CSI_Type *base, uint8_t index);
/* Typedef for interrupt handler. */
typedef void (*csi_isr_t)(CSI_Type *base, csi_handle_t *handle);
#else
/* Typedef for interrupt handler to work in fragment mode. */
typedef void (*csi_isr_t)(CSI_Type *base, csi_frag_handle_t *handle);
#endif /* CSI_DRIVER_FRAG_MODE */
/*******************************************************************************
* Variables
******************************************************************************/
/*! @brief Pointers to CSI bases for each instance. */
static CSI_Type *const s_csiBases[] = CSI_BASE_PTRS;
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
/*! @brief Pointers to CSI clocks for each CSI submodule. */
static const clock_ip_name_t s_csiClocks[] = CSI_CLOCKS;
#endif /* FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL */
/* Array for the CSI driver handle. */
#if !CSI_DRIVER_FRAG_MODE
static csi_handle_t *s_csiHandle[ARRAY_SIZE(s_csiBases)];
#else
static csi_frag_handle_t *s_csiHandle[ARRAY_SIZE(s_csiBases)];
#endif
/* Array of CSI IRQ number. */
static const IRQn_Type s_csiIRQ[] = CSI_IRQS;
/* CSI ISR for transactional APIs. */
#if defined(__ARMCC_VERSION) && (__ARMCC_VERSION >= 6010050)
static csi_isr_t s_csiIsr = (csi_isr_t)DefaultISR;
#else
static csi_isr_t s_csiIsr;
#endif
/*******************************************************************************
* Code
******************************************************************************/
static uint32_t CSI_GetInstance(CSI_Type *base)
{
uint32_t instance;
/* Find the instance index from base address mappings. */
for (instance = 0; instance < ARRAY_SIZE(s_csiBases); instance++)
{
if (s_csiBases[instance] == base)
{
break;
}
}
assert(instance < ARRAY_SIZE(s_csiBases));
return instance;
}
#if !CSI_DRIVER_FRAG_MODE
static uint8_t CSI_TransferGetQueueDelta(uint8_t startIdx, uint8_t endIdx)
{
uint8_t ret;
if (endIdx >= startIdx)
{
ret = endIdx - startIdx;
}
else
{
ret = (uint8_t)(endIdx + CSI_DRIVER_ACTUAL_QUEUE_SIZE - startIdx);
}
return ret;
}
static uint8_t CSI_TransferIncreaseQueueIdx(uint8_t idx)
{
uint8_t ret;
/*
* Here not use the method:
* ret = (idx+1) % CSI_DRIVER_ACTUAL_QUEUE_SIZE;
*
* Because the mod function might be slow.
*/
ret = idx + 1U;
if (ret >= CSI_DRIVER_ACTUAL_QUEUE_SIZE)
{
ret = 0U;
}
return ret;
}
static uint32_t CSI_TransferGetEmptyBufferCount(csi_handle_t *handle)
{
return handle->emptyBufferCnt;
}
static uint32_t CSI_TransferGetEmptyBuffer(csi_handle_t *handle)
{
pvoid_to_u32_t buf;
buf.pvoid = handle->emptyBuffer;
handle->emptyBufferCnt--;
handle->emptyBuffer = *(void **)(buf.pvoid);
return buf.u32;
}
static void CSI_TransferPutEmptyBuffer(csi_handle_t *handle, uint32_t buffer)
{
pvoid_to_u32_t buf;
buf.u32 = buffer;
*(void **)(buf.pvoid) = handle->emptyBuffer;
handle->emptyBuffer = buf.pvoid;
handle->emptyBufferCnt++;
}
static uint32_t CSI_GetRxBufferAddr(CSI_Type *base, uint8_t index)
{
uint32_t addr;
if (index != 0U)
{
addr = CSI_REG_DMASA_FB2(base);
}
else
{
addr = CSI_REG_DMASA_FB1(base);
}
return CSI_ADDR_IP_2_CPU(addr);
}
#endif /* CSI_DRIVER_FRAG_MODE */
/*!
* brief Initialize the CSI.
*
* This function enables the CSI peripheral clock, and resets the CSI registers.
*
* param base CSI peripheral base address.
* param config Pointer to the configuration structure.
*
* retval kStatus_Success Initialize successfully.
* retval kStatus_InvalidArgument Initialize failed because of invalid argument.
*/
status_t CSI_Init(CSI_Type *base, const csi_config_t *config)
{
assert(NULL != config);
uint32_t reg;
uint32_t imgWidth_Bytes;
uint8_t busCyclePerPixel;
imgWidth_Bytes = (uint32_t)config->width * (uint32_t)config->bytesPerPixel;
/* The image width and frame buffer pitch should be multiple of 8-bytes. */
if ((0U != (imgWidth_Bytes & 0x07U)) || (0U != ((uint32_t)config->linePitch_Bytes & 0x07U)))
{
return kStatus_InvalidArgument;
}
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
uint32_t instance = CSI_GetInstance(base);
CLOCK_EnableClock(s_csiClocks[instance]);
#endif
CSI_Reset(base);
/* Configure CSICR1. CSICR1 has been reset to the default value, so could write it directly. */
reg = ((uint32_t)config->workMode) | config->polarityFlags | CSI_CR1_FCC_MASK;
if (config->useExtVsync)
{
reg |= CSI_CR1_EXT_VSYNC_MASK;
}
CSI_REG_CR1(base) = reg;
/*
* Generally, CSIIMAG_PARA[IMAGE_WIDTH] indicates how many data bus cycles per line.
* One special case is when receiving 24-bit pixels through 8-bit data bus.
* In this case, the CSIIMAG_PARA[IMAGE_WIDTH] should be set to the pixel number per line.
*/
if ((kCSI_DataBus8Bit == config->dataBus) && (2U == config->bytesPerPixel))
{
busCyclePerPixel = 2U;
}
else
{
busCyclePerPixel = 1U;
}
if (4U == config->bytesPerPixel)
{
CSI_REG_CR18(base) |= CSI_CR18_PARALLEL24_EN_MASK;
}
if (kCSI_DataBus16Bit == config->dataBus)
{
CSI_REG_CR3(base) |= CSI_CR3_TWO_8BIT_SENSOR_MASK;
}
/* Image parameter. */
CSI_REG_IMAG_PARA(base) =
(((uint32_t)config->width * (uint32_t)busCyclePerPixel) << CSI_IMAG_PARA_IMAGE_WIDTH_SHIFT) |
((uint32_t)(config->height) << CSI_IMAG_PARA_IMAGE_HEIGHT_SHIFT);
/* The CSI frame buffer bus is 8-byte width. */
CSI_REG_FBUF_PARA(base) = (uint32_t)((config->linePitch_Bytes - imgWidth_Bytes) / 8U)
<< CSI_FBUF_PARA_FBUF_STRIDE_SHIFT;
/* Enable auto ECC. */
CSI_REG_CR3(base) |= CSI_CR3_ECC_AUTO_EN_MASK;
/*
* For better performance.
* The DMA burst size could be set to 16 * 8 byte, 8 * 8 byte, or 4 * 8 byte,
* choose the best burst size based on bytes per line.
*/
if (0U == (imgWidth_Bytes % (8U * 16U)))
{
CSI_REG_CR2(base) = CSI_CR2_DMA_BURST_TYPE_RFF(3U);
CSI_REG_CR3(base) = (CSI_REG_CR3(base) & ~CSI_CR3_RxFF_LEVEL_MASK) | ((2U << CSI_CR3_RxFF_LEVEL_SHIFT));
}
else if (0U == (imgWidth_Bytes % (8U * 8U)))
{
CSI_REG_CR2(base) = CSI_CR2_DMA_BURST_TYPE_RFF(2U);
CSI_REG_CR3(base) = (CSI_REG_CR3(base) & ~CSI_CR3_RxFF_LEVEL_MASK) | ((1U << CSI_CR3_RxFF_LEVEL_SHIFT));
}
else
{
CSI_REG_CR2(base) = CSI_CR2_DMA_BURST_TYPE_RFF(1U);
CSI_REG_CR3(base) = (CSI_REG_CR3(base) & ~CSI_CR3_RxFF_LEVEL_MASK) | ((0U << CSI_CR3_RxFF_LEVEL_SHIFT));
}
CSI_ReflashFifoDma(base, kCSI_RxFifo);
return kStatus_Success;
}
/*!
* brief De-initialize the CSI.
*
* This function disables the CSI peripheral clock.
*
* param base CSI peripheral base address.
*/
void CSI_Deinit(CSI_Type *base)
{
/* Disable transfer first. */
CSI_Stop(base);
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
uint32_t instance = CSI_GetInstance(base);
CLOCK_DisableClock(s_csiClocks[instance]);
#endif
}
/*!
* brief Reset the CSI.
*
* This function resets the CSI peripheral registers to default status.
*
* param base CSI peripheral base address.
*/
void CSI_Reset(CSI_Type *base)
{
uint32_t csisr;
/* Disable transfer first. */
CSI_Stop(base);
/* Disable DMA request. */
CSI_REG_CR3(base) = 0U;
/* Reset the fame count. */
CSI_REG_CR3(base) |= CSI_CR3_FRMCNT_RST_MASK;
while (0U != (CSI_REG_CR3(base) & CSI_CR3_FRMCNT_RST_MASK))
{
}
/* Clear the RX FIFO. */
CSI_ClearFifo(base, kCSI_AllFifo);
/* Reflash DMA. */
CSI_ReflashFifoDma(base, kCSI_AllFifo);
/* Clear the status. */
csisr = CSI_REG_SR(base);
CSI_REG_SR(base) = csisr;
/* Set the control registers to default value. */
CSI_REG_CR1(base) = CSI_CR1_HSYNC_POL_MASK | CSI_CR1_EXT_VSYNC_MASK;
CSI_REG_CR2(base) = 0U;
CSI_REG_CR3(base) = 0U;
#if defined(CSI_CR18_CSI_LCDIF_BUFFER_LINES)
CSI_REG_CR18(base) = CSI_CR18_AHB_HPROT(0x0DU) | CSI_CR18_CSI_LCDIF_BUFFER_LINES(0x02U);
#else
CSI_REG_CR18(base) = CSI_CR18_AHB_HPROT(0x0DU);
#endif
CSI_REG_FBUF_PARA(base) = 0U;
CSI_REG_IMAG_PARA(base) = 0U;
}
/*!
* brief Get the default configuration for to initialize the CSI.
*
* The default configuration value is:
*
* code
config->width = 320U;
config->height = 240U;
config->polarityFlags = kCSI_HsyncActiveHigh | kCSI_DataLatchOnRisingEdge;
config->bytesPerPixel = 2U;
config->linePitch_Bytes = 320U * 2U;
config->workMode = kCSI_GatedClockMode;
config->dataBus = kCSI_DataBus8Bit;
config->useExtVsync = true;
endcode
*
* param config Pointer to the CSI configuration.
*/
void CSI_GetDefaultConfig(csi_config_t *config)
{
assert(NULL != config);
/* Initializes the configure structure to zero. */
(void)memset(config, 0, sizeof(*config));
config->width = 320U;
config->height = 240U;
config->polarityFlags = (uint32_t)kCSI_HsyncActiveHigh | (uint32_t)kCSI_DataLatchOnRisingEdge;
config->bytesPerPixel = 2U;
config->linePitch_Bytes = 320U * 2U;
config->workMode = kCSI_GatedClockMode;
config->dataBus = kCSI_DataBus8Bit;
config->useExtVsync = true;
}
/*!
* brief Set the RX frame buffer address.
*
* param base CSI peripheral base address.
* param index Buffer index.
* param addr Frame buffer address to set.
*/
void CSI_SetRxBufferAddr(CSI_Type *base, uint8_t index, uint32_t addr)
{
addr = CSI_ADDR_CPU_2_IP(addr);
if (0U != index)
{
CSI_REG_DMASA_FB2(base) = addr;
}
else
{
CSI_REG_DMASA_FB1(base) = addr;
}
}
/*!
* brief Clear the CSI FIFO.
*
* This function clears the CSI FIFO.
*
* param base CSI peripheral base address.
* param fifo The FIFO to clear.
*/
void CSI_ClearFifo(CSI_Type *base, csi_fifo_t fifo)
{
uint32_t cr1;
uint32_t mask = 0U;
/* The FIFO could only be cleared when CSICR1[FCC] = 0, so first clear the FCC. */
cr1 = CSI_REG_CR1(base);
CSI_REG_CR1(base) = (cr1 & ~CSI_CR1_FCC_MASK);
if (0U != ((uint32_t)fifo & (uint32_t)kCSI_RxFifo))
{
mask |= CSI_CR1_CLR_RXFIFO_MASK;
}
if (0U != ((uint32_t)fifo & (uint32_t)kCSI_StatFifo))
{
mask |= CSI_CR1_CLR_STATFIFO_MASK;
}
CSI_REG_CR1(base) = (cr1 & ~CSI_CR1_FCC_MASK) | mask;
/* Wait clear completed. */
while (0U != (CSI_REG_CR1(base) & mask))
{
}
/* Recover the FCC. */
CSI_REG_CR1(base) = cr1;
}
/*!
* brief Reflash the CSI FIFO DMA.
*
* This function reflashes the CSI FIFO DMA.
*
* For RXFIFO, there are two frame buffers. When the CSI module started, it saves
* the frames to frame buffer 0 then frame buffer 1, the two buffers will be
* written by turns. After reflash DMA using this function, the CSI is reset to
* save frame to buffer 0.
*
* param base CSI peripheral base address.
* param fifo The FIFO DMA to reflash.
*/
void CSI_ReflashFifoDma(CSI_Type *base, csi_fifo_t fifo)
{
uint32_t cr3 = 0U;
if (0U != ((uint32_t)fifo & (uint32_t)kCSI_RxFifo))
{
cr3 |= CSI_CR3_DMA_REFLASH_RFF_MASK;
}
if (0U != ((uint32_t)fifo & (uint32_t)kCSI_StatFifo))
{
cr3 |= CSI_CR3_DMA_REFLASH_SFF_MASK;
}
CSI_REG_CR3(base) |= cr3;
/* Wait clear completed. */
while (0U != (CSI_REG_CR3(base) & cr3))
{
}
}
/*!
* brief Enable or disable the CSI FIFO DMA request.
*
* param base CSI peripheral base address.
* param fifo The FIFO DMA reques to enable or disable.
* param enable True to enable, false to disable.
*/
void CSI_EnableFifoDmaRequest(CSI_Type *base, csi_fifo_t fifo, bool enable)
{
uint32_t cr3 = 0U;
if (0U != ((uint32_t)fifo & (uint32_t)kCSI_RxFifo))
{
cr3 |= CSI_CR3_DMA_REQ_EN_RFF_MASK;
}
if (0U != ((uint32_t)fifo & (uint32_t)kCSI_StatFifo))
{
cr3 |= CSI_CR3_DMA_REQ_EN_SFF_MASK;
}
if (enable)
{
CSI_REG_CR3(base) |= cr3;
}
else
{
CSI_REG_CR3(base) &= ~cr3;
}
}
/*!
* brief Enables CSI interrupt requests.
*
* param base CSI peripheral base address.
* param mask The interrupts to enable, pass in as OR'ed value of ref _csi_interrupt_enable.
*/
void CSI_EnableInterrupts(CSI_Type *base, uint32_t mask)
{
CSI_REG_CR1(base) |= (mask & CSI_CR1_INT_EN_MASK);
CSI_REG_CR3(base) |= (mask & CSI_CR3_INT_EN_MASK);
CSI_REG_CR18(base) |= ((mask & CSI_CR18_INT_EN_MASK) >> 6U);
}
/*!
* brief Disable CSI interrupt requests.
*
* param base CSI peripheral base address.
* param mask The interrupts to disable, pass in as OR'ed value of ref _csi_interrupt_enable.
*/
void CSI_DisableInterrupts(CSI_Type *base, uint32_t mask)
{
CSI_REG_CR1(base) &= ~(mask & CSI_CR1_INT_EN_MASK);
CSI_REG_CR3(base) &= ~(mask & CSI_CR3_INT_EN_MASK);
CSI_REG_CR18(base) &= ~((mask & CSI_CR18_INT_EN_MASK) >> 6U);
}
#if !CSI_DRIVER_FRAG_MODE
/*!
* brief Initializes the CSI handle.
*
* This function initializes CSI handle, it should be called before any other
* CSI transactional functions.
*
* param base CSI peripheral base address.
* param handle Pointer to the handle structure.
* param callback Callback function for CSI transfer.
* param userData Callback function parameter.
*
* retval kStatus_Success Handle created successfully.
*/
status_t CSI_TransferCreateHandle(CSI_Type *base,
csi_handle_t *handle,
csi_transfer_callback_t callback,
void *userData)
{
assert(NULL != handle);
uint32_t instance;
(void)memset(handle, 0, sizeof(*handle));
/* Set the callback and user data. */
handle->callback = callback;
handle->userData = userData;
/* Get instance from peripheral base address. */
instance = CSI_GetInstance(base);
/* Save the handle in global variables to support the double weak mechanism. */
s_csiHandle[instance] = handle;
s_csiIsr = CSI_TransferHandleIRQ;
/* Enable interrupt. */
(void)EnableIRQ(s_csiIRQ[instance]);
return kStatus_Success;
}
/*!
* brief Start the transfer using transactional functions.
*
* When the empty frame buffers have been submit to CSI driver using function
* ref CSI_TransferSubmitEmptyBuffer, user could call this function to start
* the transfer. The incoming frame will be saved to the empty frame buffer,
* and user could be optionally notified through callback function.
*
* param base CSI peripheral base address.
* param handle Pointer to the handle structure.
*
* retval kStatus_Success Started successfully.
* retval kStatus_CSI_NoEmptyBuffer Could not start because no empty frame buffer in queue.
*/
status_t CSI_TransferStart(CSI_Type *base, csi_handle_t *handle)
{
assert(NULL != handle);
uint32_t emptyBufferCount;
emptyBufferCount = CSI_TransferGetEmptyBufferCount(handle);
if (emptyBufferCount < 2U)
{
return kStatus_CSI_NoEmptyBuffer;
}
/*
* Write to memory from first completed frame.
* DMA base addr switch at the edge of the first data of each frame, thus
* if one frame is broken, it could be reset at the next frame.
*/
CSI_REG_CR18(base) = (CSI_REG_CR18(base) & ~CSI_CR18_MASK_OPTION_MASK) | CSI_CR18_MASK_OPTION(0) |
CSI_CR18_BASEADDR_SWITCH_SEL_MASK | CSI_CR18_BASEADDR_SWITCH_EN_MASK;
/* Load the frame buffer to CSI register, there are at least two empty buffers. */
CSI_REG_DMASA_FB1(base) = CSI_ADDR_CPU_2_IP(CSI_TransferGetEmptyBuffer(handle));
CSI_REG_DMASA_FB2(base) = CSI_ADDR_CPU_2_IP(CSI_TransferGetEmptyBuffer(handle));
handle->activeBufferNum = CSI_MAX_ACTIVE_FRAME_NUM;
/* After reflash DMA, the CSI saves frame to frame buffer 0. */
CSI_ReflashFifoDma(base, kCSI_RxFifo);
handle->transferStarted = true;
CSI_EnableInterrupts(
base, (uint32_t)kCSI_RxBuffer1DmaDoneInterruptEnable | (uint32_t)kCSI_RxBuffer0DmaDoneInterruptEnable);
CSI_Start(base);
return kStatus_Success;
}
/*!
* brief Stop the transfer using transactional functions.
*
* The driver does not clean the full frame buffers in queue. In other words, after
* calling this function, user still could get the full frame buffers in queue
* using function ref CSI_TransferGetFullBuffer.
*
* param base CSI peripheral base address.
* param handle Pointer to the handle structure.
*
* retval kStatus_Success Stoped successfully.
*/
status_t CSI_TransferStop(CSI_Type *base, csi_handle_t *handle)
{
assert(NULL != handle);
uint8_t activeBufferNum;
uint8_t bufIdx;
CSI_Stop(base);
CSI_DisableInterrupts(
base, (uint32_t)kCSI_RxBuffer1DmaDoneInterruptEnable | (uint32_t)kCSI_RxBuffer0DmaDoneInterruptEnable);
activeBufferNum = handle->activeBufferNum;
handle->transferStarted = false;
handle->activeBufferNum = 0;
/*
* Put active buffers to empty queue.
*
* If there is only one active frame buffers, then FB0 and FB1 use the same address,
* put FB0 to empty buffer queue is OK.
*/
for (bufIdx = 0; bufIdx < activeBufferNum; bufIdx++)
{
CSI_TransferPutEmptyBuffer(handle, CSI_GetRxBufferAddr(base, bufIdx));
}
return kStatus_Success;
}
/*!
* brief Submit empty frame buffer to queue.
*
* This function could be called before ref CSI_TransferStart or after ref
* CSI_TransferStart. If there is no room in queue to store the empty frame
* buffer, this function returns error.
*
* param base CSI peripheral base address.
* param handle Pointer to the handle structure.
* param frameBuffer Empty frame buffer to submit.
*
* retval kStatus_Success Started successfully.
* retval kStatus_CSI_QueueFull Could not submit because there is no room in queue.
*/
status_t CSI_TransferSubmitEmptyBuffer(CSI_Type *base, csi_handle_t *handle, uint32_t frameBuffer)
{
uint32_t csicr1;
/* Disable the interrupt to protect the index information in handle. */
csicr1 = CSI_REG_CR1(base);
CSI_REG_CR1(base) = (csicr1 & ~(CSI_CR1_FB2_DMA_DONE_INTEN_MASK | CSI_CR1_FB1_DMA_DONE_INTEN_MASK));
/* Save the empty frame buffer address to queue. */
CSI_TransferPutEmptyBuffer(handle, frameBuffer);
CSI_REG_CR1(base) = csicr1;
return kStatus_Success;
}
/*!
* brief Get one full frame buffer from queue.
*
* After the transfer started using function ref CSI_TransferStart, the incoming
* frames will be saved to the empty frame buffers in queue. This function gets
* the full-filled frame buffer from the queue. If there is no full frame buffer
* in queue, this function returns error.
*
* param base CSI peripheral base address.
* param handle Pointer to the handle structure.
* param frameBuffer Full frame buffer.
*
* retval kStatus_Success Started successfully.
* retval kStatus_CSI_NoFullBuffer There is no full frame buffer in queue.
*/
status_t CSI_TransferGetFullBuffer(CSI_Type *base, csi_handle_t *handle, uint32_t *frameBuffer)
{
uint32_t csicr1;
status_t status;
uint8_t queueReadIdx;
uint8_t queueWriteIdx;
queueReadIdx = handle->queueReadIdx;
queueWriteIdx = handle->queueWriteIdx;
/* No full frame buffer. */
if (queueReadIdx == queueWriteIdx)
{
status = kStatus_CSI_NoFullBuffer;
}
else
{
/* Disable the interrupt to protect the index information in handle. */
csicr1 = CSI_REG_CR1(base);
CSI_REG_CR1(base) = (csicr1 & ~(CSI_CR1_FB2_DMA_DONE_INTEN_MASK | CSI_CR1_FB1_DMA_DONE_INTEN_MASK));
*frameBuffer = handle->frameBufferQueue[handle->queueReadIdx];
handle->queueReadIdx = CSI_TransferIncreaseQueueIdx(handle->queueReadIdx);
CSI_REG_CR1(base) = csicr1;
status = kStatus_Success;
}
return status;
}
/*!
* brief CSI IRQ handle function.
*
* This function handles the CSI IRQ request to work with CSI driver transactional
* APIs.
*
* param base CSI peripheral base address.
* param handle CSI handle pointer.
*/
void CSI_TransferHandleIRQ(CSI_Type *base, csi_handle_t *handle)
{
uint8_t queueWriteIdx;
uint8_t queueReadIdx;
uint8_t dmaDoneBufferIdx;
uint32_t frameBuffer;
uint32_t csisr = CSI_REG_SR(base);
/* Clear the error flags. */
CSI_REG_SR(base) = csisr;
/*
* If both frame buffer 0 and frame buffer 1 flags assert, driver does not
* know which frame buffer ready just now, so skip them.
*/
if ((csisr & (CSI_SR_DMA_TSF_DONE_FB2_MASK | CSI_SR_DMA_TSF_DONE_FB1_MASK)) ==
(CSI_SR_DMA_TSF_DONE_FB2_MASK | CSI_SR_DMA_TSF_DONE_FB1_MASK))
{
; /* Skip the frames. */
}
else if (0U != (csisr & (CSI_SR_DMA_TSF_DONE_FB2_MASK | CSI_SR_DMA_TSF_DONE_FB1_MASK)))
{
if (0U != (csisr & CSI_SR_DMA_TSF_DONE_FB2_MASK))
{
dmaDoneBufferIdx = 1;
}
else
{
dmaDoneBufferIdx = 0;
}
if (handle->activeBufferNum == CSI_MAX_ACTIVE_FRAME_NUM)
{
queueWriteIdx = handle->queueWriteIdx;
queueReadIdx = handle->queueReadIdx;
if (CSI_TransferGetQueueDelta(queueReadIdx, queueWriteIdx) < CSI_DRIVER_QUEUE_SIZE)
{
/* Put the full frame buffer to full buffer queue. */
frameBuffer = CSI_GetRxBufferAddr(base, dmaDoneBufferIdx);
handle->frameBufferQueue[queueWriteIdx] = frameBuffer;
handle->queueWriteIdx = CSI_TransferIncreaseQueueIdx(queueWriteIdx);
handle->activeBufferNum--;
if (NULL != handle->callback)
{
handle->callback(base, handle, kStatus_CSI_FrameDone, handle->userData);
}
}
else
{
}
}
/*
* User may submit new frame buffer in callback, so recheck activeBufferNum here,
* if there is only one active buffer in CSI device, the two buffer registers
* are both set to the frame buffer address.
*/
if (handle->activeBufferNum < CSI_MAX_ACTIVE_FRAME_NUM)
{
if (CSI_TransferGetEmptyBufferCount(handle) > 0U)
{
/* Get the empty frameBuffer, and submit to CSI device. */
CSI_SetRxBufferAddr(base, dmaDoneBufferIdx, CSI_TransferGetEmptyBuffer(handle));
handle->activeBufferNum++;
}
else
{
/* If there is only one active frame buffer, then the two CSI
* output buffer address are all set to this frame buffer.
*/
frameBuffer = CSI_GetRxBufferAddr(base, dmaDoneBufferIdx ^ 1U);
CSI_SetRxBufferAddr(base, dmaDoneBufferIdx, frameBuffer);
}
}
}
else
{
}
}
#else /* CSI_DRIVER_FRAG_MODE */
#if defined(__CC_ARM)
__asm void CSI_ExtractYFromYUYV(void *datBase, const void *dmaBase, size_t count)
{
/* clang-format off */
push {r4-r7, lr}
10
LDMIA R1!, {r3-r6}
bfi r7, r3, #0, #8 /* Y0 */
bfi ip, r5, #0, #8 /* Y4 */
lsr r3, r3, #16
lsr r5, r5, #16
bfi r7, r3, #8, #8 /* Y1 */
bfi ip, r5, #8, #8 /* Y5 */
bfi r7, r4, #16, #8 /* Y2 */
bfi ip, r6, #16, #8 /* Y6 */
lsr r4, r4, #16
lsr r6, r6, #16
bfi r7, r4, #24, #8 /* Y3 */
bfi ip, r6, #24, #8 /* Y7 */
STMIA r0!, {r7, ip}
subs r2, #8
bne %b10
pop {r4-r7, pc}
/* clang-format on */
}
__asm void CSI_ExtractYFromUYVY(void *datBase, const void *dmaBase, size_t count)
{
/* clang-format off */
push {r4-r7, lr}
10
LDMIA R1!, {r3-r6}
lsr r3, r3, #8
lsr r5, r5, #8
bfi r7, r3, #0, #8 /* Y0 */
bfi ip, r5, #0, #8 /* Y4 */
lsr r3, r3, #16
lsr r5, r5, #16
bfi r7, r3, #8, #8 /* Y1 */
bfi ip, r5, #8, #8 /* Y5 */
lsr r4, r4, #8
lsr r6, r6, #8
bfi r7, r4, #16, #8 /* Y2 */
bfi ip, r6, #16, #8 /* Y6 */
lsr r4, r4, #16
lsr r6, r6, #16
bfi r7, r4, #24, #8 /* Y3 */
bfi ip, r6, #24, #8 /* Y7 */
STMIA r0!, {r7, ip}
subs r2, #8
bne %b10
pop {r4-r7, pc}
/* clang-format on */
}
#elif (defined(__GNUC__) || defined(__ICCARM__)) || defined(__ARMCC_VERSION)
#if defined(__ICCARM__)
#pragma diag_suppress = Pe940
#endif
__attribute__((naked)) void CSI_ExtractYFromYUYV(void *datBase, const void *dmaBase, size_t count);
void CSI_ExtractYFromYUYV(void *datBase, const void *dmaBase, size_t count)
{
/* clang-format off */
__asm volatile(
" push {r1-r7, r12, lr} \n"
"loop0: \n"
" ldmia r1!, {r3-r6} \n"
" bfi r7, r3, #0, #8 \n" /* Y0 */
" bfi r12, r5, #0, #8 \n" /* Y4 */
" lsr r3, r3, #16 \n"
" lsr r5, r5, #16 \n"
" bfi r7, r3, #8, #8 \n" /* Y1 */
" bfi r12, r5, #8, #8 \n" /* Y5 */
" bfi r7, r4, #16, #8 \n" /* Y2 */
" bfi r12, r6, #16, #8 \n" /* Y6 */
" lsr r4, r4, #16 \n"
" lsr r6, r6, #16 \n"
" bfi r7, r4, #24, #8 \n" /* Y3 */
" bfi r12, r6, #24, #8 \n" /* Y7 */
" stmia r0!, {r7, r12} \n"
" subs r2, #8 \n"
" bne loop0 \n"
" pop {r1-r7, r12, pc} \n");
/* clang-format on */
}
__attribute__((naked)) void CSI_ExtractYFromUYVY(void *datBase, const void *dmaBase, size_t count);
void CSI_ExtractYFromUYVY(void *datBase, const void *dmaBase, size_t count)
{
/* clang-format off */
__asm volatile(
" push {r1-r7, r12, lr} \n"
"loop1: \n"
" ldmia r1!, {r3-r6} \n"
" lsr r3, r3, #8 \n"
" lsr r5, r5, #8 \n"
" bfi r7, r3, #0, #8 \n" /* Y0 */
" bfi r12, r5, #0, #8 \n" /* Y4 */
" lsr r3, r3, #16 \n"
" lsr r5, r5, #16 \n"
" bfi r7, r3, #8, #8 \n" /* Y1 */
" bfi r12, r5, #8, #8 \n" /* Y5 */
" lsr r4, r4, #8 \n"
" lsr r6, r6, #8 \n"
" bfi r7, r4, #16, #8 \n" /* Y2 */
" bfi r12, r6, #16, #8 \n" /* Y6 */
" lsr r4, r4, #16 \n"
" lsr r6, r6, #16 \n"
" bfi r7, r4, #24, #8 \n" /* Y3 */
" bfi r12, r6, #24, #8 \n" /* Y7 */
" stmia r0!, {r7, r12} \n"
" subs r2, #8 \n"
" bne loop1 \n"
" pop {r1-r7, r12, pc} \n");
/* clang-format on */
}
#if defined(__ICCARM__)
#pragma diag_default = Pe940
#endif
#else
#error Toolchain not supported.
#endif
static void CSI_MemCopy(void *pDest, const void *pSrc, size_t cnt)
{
(void)memcpy(pDest, pSrc, cnt);
}
/*!
* brief Initialize the CSI to work in fragment mode.
*
* This function enables the CSI peripheral clock, and resets the CSI registers.
*
* param base CSI peripheral base address.
*/
void CSI_FragModeInit(CSI_Type *base)
{
#if !(defined(FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL) && FSL_SDK_DISABLE_DRIVER_CLOCK_CONTROL)
uint32_t instance = CSI_GetInstance(base);
CLOCK_EnableClock(s_csiClocks[instance]);
#endif
CSI_Reset(base);
}
/*!
* brief De-initialize the CSI.
*
* This function disables the CSI peripheral clock.
*
* param base CSI peripheral base address.
*/
void CSI_FragModeDeinit(CSI_Type *base)
{
CSI_Deinit(base);
}
/*!
* brief Create handle for CSI work in fragment mode.
*
* param base CSI peripheral base address.
* param handle Pointer to the transactional handle.
* param config Pointer to the configuration structure.
* param callback Callback function for CSI transfer.
* param userData Callback function parameter.
*
* retval kStatus_Success Initialize successfully.
* retval kStatus_InvalidArgument Initialize failed because of invalid argument.
*/
status_t CSI_FragModeCreateHandle(CSI_Type *base,
csi_frag_handle_t *handle,
const csi_frag_config_t *config,
csi_frag_transfer_callback_t callback,
void *userData)
{
assert(NULL != config);
uint32_t reg;
uint32_t instance;
uint32_t imgWidth_Bytes;
if (config->dataBus != kCSI_DataBus8Bit)
{
return kStatus_InvalidArgument;
}
imgWidth_Bytes = (uint32_t)config->width * CSI_FRAG_INPUT_BYTES_PER_PIXEL;
/* The image buffer line width should be multiple of 8-bytes. */
if ((imgWidth_Bytes & 0x07U) != 0U)
{
return kStatus_InvalidArgument;
}
/* Camera frame height must be dividable by DMA buffer line. */
if (config->height % config->dmaBufferLine != 0U)
{
return kStatus_InvalidArgument;
}
(void)memset(handle, 0, sizeof(*handle));
handle->callback = callback;
handle->userData = userData;
handle->height = config->height;
handle->width = config->width;
handle->maxLinePerFrag = config->dmaBufferLine;
handle->dmaBytePerLine = config->width * CSI_FRAG_INPUT_BYTES_PER_PIXEL;
handle->isDmaBufferCachable = config->isDmaBufferCachable;
/* Get instance from peripheral base address. */
instance = CSI_GetInstance(base);
/* Save the handle in global variables to support the double weak mechanism. */
s_csiHandle[instance] = handle;
s_csiIsr = CSI_FragModeTransferHandleIRQ;
(void)EnableIRQ(s_csiIRQ[instance]);
/* Configure CSICR1. CSICR1 has been reset to the default value, so could write it directly. */
reg = ((uint32_t)config->workMode) | config->polarityFlags | CSI_CR1_FCC_MASK;
if (config->useExtVsync)
{
reg |= CSI_CR1_EXT_VSYNC_MASK;
}
CSI_REG_CR1(base) = reg;
/* No stride. */
CSI_REG_FBUF_PARA(base) = 0;
/* Enable auto ECC. */
CSI_REG_CR3(base) |= CSI_CR3_ECC_AUTO_EN_MASK;
/*
* For better performance.
* The DMA burst size could be set to 16 * 8 byte, 8 * 8 byte, or 4 * 8 byte,
* choose the best burst size based on bytes per line.
*/
if (0U == (imgWidth_Bytes % (8U * 16U)))
{
CSI_REG_CR2(base) = CSI_CR2_DMA_BURST_TYPE_RFF(3U);
CSI_REG_CR3(base) = (CSI_REG_CR3(base) & ~CSI_CR3_RxFF_LEVEL_MASK) | ((2U << CSI_CR3_RxFF_LEVEL_SHIFT));
}
else if (0U == (imgWidth_Bytes % (8U * 8U)))
{
CSI_REG_CR2(base) = CSI_CR2_DMA_BURST_TYPE_RFF(2U);
CSI_REG_CR3(base) = (CSI_REG_CR3(base) & ~CSI_CR3_RxFF_LEVEL_MASK) | ((1U << CSI_CR3_RxFF_LEVEL_SHIFT));
}
else
{
CSI_REG_CR2(base) = CSI_CR2_DMA_BURST_TYPE_RFF(1U);
CSI_REG_CR3(base) = (CSI_REG_CR3(base) & ~CSI_CR3_RxFF_LEVEL_MASK) | ((0U << CSI_CR3_RxFF_LEVEL_SHIFT));
}
CSI_REG_DMASA_FB1(base) = CSI_ADDR_CPU_2_IP(config->dmaBufferAddr0);
CSI_REG_DMASA_FB2(base) = CSI_ADDR_CPU_2_IP(config->dmaBufferAddr1);
if (handle->isDmaBufferCachable)
{
DCACHE_CleanInvalidateByRange(
config->dmaBufferAddr0,
(uint32_t)config->dmaBufferLine * (uint32_t)config->width * CSI_FRAG_INPUT_BYTES_PER_PIXEL);
DCACHE_CleanInvalidateByRange(
config->dmaBufferAddr1,
(uint32_t)config->dmaBufferLine * (uint32_t)config->width * CSI_FRAG_INPUT_BYTES_PER_PIXEL);
}
return kStatus_Success;
}
/*!
* brief Start to capture a image.
*
* param base CSI peripheral base address.
* param handle Pointer to the transactional handle.
* param config Pointer to the capture configuration.
*
* retval kStatus_Success Initialize successfully.
* retval kStatus_InvalidArgument Initialize failed because of invalid argument.
*/
status_t CSI_FragModeTransferCaptureImage(CSI_Type *base,
csi_frag_handle_t *handle,
const csi_frag_capture_config_t *config)
{
assert(NULL != config);
uint16_t windowWidth;
/*
* If no special window setting, capture full frame.
* If capture window, then capture 1 one each fragment.
*/
if (config->window != NULL)
{
handle->windowULX = config->window->windowULX;
handle->windowULY = config->window->windowULY;
handle->windowLRX = config->window->windowLRX;
handle->windowLRY = config->window->windowLRY;
handle->linePerFrag = 1;
}
else
{
handle->windowULX = 0;
handle->windowULY = 0;
handle->windowLRX = handle->width - 1U;
handle->windowLRY = handle->height - 1U;
handle->linePerFrag = handle->maxLinePerFrag;
}
windowWidth = handle->windowLRX - handle->windowULX + 1U;
if (config->outputGrayScale)
{
/* When output format is gray, the window width must be multiple value of 8. */
if (windowWidth % 8U != 0U)
{
return kStatus_InvalidArgument;
}
handle->datBytePerLine = windowWidth;
if (handle->inputFormat == kCSI_FragInputYUYV)
{
handle->copyFunc = CSI_ExtractYFromYUYV;
}
else
{
handle->copyFunc = CSI_ExtractYFromUYVY;
}
}
else
{
handle->datBytePerLine = windowWidth * CSI_FRAG_INPUT_BYTES_PER_PIXEL;
handle->copyFunc = CSI_MemCopy;
}
handle->dmaCurLine = 0;
handle->outputBuffer = (uint32_t)config->buffer;
handle->datCurWriteAddr = (uint32_t)config->buffer;
/* Image parameter. */
CSI_REG_IMAG_PARA(base) =
(((uint32_t)handle->width * CSI_FRAG_INPUT_BYTES_PER_PIXEL) << CSI_IMAG_PARA_IMAGE_WIDTH_SHIFT) |
((uint32_t)(handle->linePerFrag) << CSI_IMAG_PARA_IMAGE_HEIGHT_SHIFT);
/*
* Write to memory from first completed frame.
* DMA base addr switch at dma transfer done.
*/
CSI_REG_CR18(base) = (CSI_REG_CR18(base) & ~CSI_CR18_MASK_OPTION_MASK) | CSI_CR18_MASK_OPTION(0);
CSI_EnableInterrupts(base, (uint32_t)kCSI_StartOfFrameInterruptEnable |
(uint32_t)kCSI_RxBuffer1DmaDoneInterruptEnable |
(uint32_t)kCSI_RxBuffer0DmaDoneInterruptEnable);
return kStatus_Success;
}
/*!
* brief Abort image capture.
*
* Abort image capture initialized by ref CSI_FragModeTransferCaptureImage.
*
* param base CSI peripheral base address.
* param handle Pointer to the transactional handle.
*/
void CSI_FragModeTransferAbortCaptureImage(CSI_Type *base, csi_frag_handle_t *handle)
{
CSI_Stop(base);
CSI_DisableInterrupts(base, (uint32_t)kCSI_StartOfFrameInterruptEnable |
(uint32_t)kCSI_RxBuffer1DmaDoneInterruptEnable |
(uint32_t)kCSI_RxBuffer0DmaDoneInterruptEnable);
}
/*!
* brief CSI IRQ handle function.
*
* This function handles the CSI IRQ request to work with CSI driver fragment mode
* APIs.
*
* param base CSI peripheral base address.
* param handle CSI handle pointer.
*/
void CSI_FragModeTransferHandleIRQ(CSI_Type *base, csi_frag_handle_t *handle)
{
uint32_t csisr = CSI_REG_SR(base);
uint32_t dmaBufAddr;
uint16_t line;
pvoid_to_u32_t memSrc;
pvoid_to_u32_t memDest;
/* Clear the error flags. */
CSI_REG_SR(base) = csisr;
/* Start of frame, clear the FIFO and start receiving. */
if (0U != (csisr & (uint32_t)kCSI_StartOfFrameFlag))
{
/* Reflash the DMA and enable RX DMA request. */
CSI_REG_CR3(base) |= (CSI_CR3_DMA_REFLASH_RFF_MASK | CSI_CR3_DMA_REQ_EN_RFF_MASK);
CSI_Start(base);
handle->dmaCurLine = 0;
handle->datCurWriteAddr = handle->outputBuffer;
}
else if ((csisr & (CSI_SR_DMA_TSF_DONE_FB2_MASK | CSI_SR_DMA_TSF_DONE_FB1_MASK)) != 0U)
{
if ((csisr & CSI_SR_DMA_TSF_DONE_FB1_MASK) == CSI_SR_DMA_TSF_DONE_FB1_MASK)
{
dmaBufAddr = CSI_REG_DMASA_FB1(base);
}
else
{
dmaBufAddr = CSI_REG_DMASA_FB2(base);
}
dmaBufAddr = CSI_ADDR_IP_2_CPU(dmaBufAddr);
if (handle->isDmaBufferCachable)
{
DCACHE_InvalidateByRange(dmaBufAddr, (uint32_t)handle->dmaBytePerLine * (uint32_t)handle->linePerFrag);
}
/* Copy from DMA buffer to user data buffer. */
dmaBufAddr += ((uint32_t)handle->windowULX * CSI_FRAG_INPUT_BYTES_PER_PIXEL);
for (line = 0; line < handle->linePerFrag; line++)
{
if (handle->dmaCurLine + line > handle->windowLRY)
{
/* out of window range */
break;
}
else if (handle->dmaCurLine + line >= handle->windowULY)
{
memDest.u32 = handle->datCurWriteAddr;
memSrc.u32 = dmaBufAddr;
handle->copyFunc(memDest.pvoid, memSrc.pvoid, handle->datBytePerLine);
handle->datCurWriteAddr += handle->datBytePerLine;
dmaBufAddr += handle->dmaBytePerLine;
}
else
{
; /* For MISRA C-2012 Rule 15.7 */
}
}
handle->dmaCurLine += handle->linePerFrag;
if (handle->dmaCurLine >= handle->height)
{
CSI_Stop(base);
CSI_DisableInterrupts(base, (uint32_t)kCSI_StartOfFrameInterruptEnable |
(uint32_t)kCSI_RxBuffer1DmaDoneInterruptEnable |
(uint32_t)kCSI_RxBuffer0DmaDoneInterruptEnable);
/* Image captured. Stop the CSI. */
if (NULL != handle->callback)
{
handle->callback(base, handle, kStatus_CSI_FrameDone, handle->userData);
}
}
}
else
{
}
}
#endif /* CSI_DRIVER_FRAG_MODE */
#if defined(CSI)
void CSI_DriverIRQHandler(void);
void CSI_DriverIRQHandler(void)
{
s_csiIsr(CSI, s_csiHandle[0]);
SDK_ISR_EXIT_BARRIER;
}
#endif
#if defined(CSI0)
void CSI0_DriverIRQHandler(void);
void CSI0_DriverIRQHandler(void)
{
s_csiIsr(CSI, s_csiHandle[0]);
SDK_ISR_EXIT_BARRIER;
}
#endif
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