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rt-thread-official/bsp/stm32f429-apollo/drivers/drv_spi.c

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/*
* File : drv_spi.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2017 RT-Thread Develop Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2017-06-05 tanek first implementation.
*/
#include "drv_spi.h"
#include <board.h>
#include <finsh.h>
//#define DEBUG
#ifdef DEBUG
#define DEBUG_PRINTF(...) rt_kprintf(__VA_ARGS__)
#else
#define DEBUG_PRINTF(...)
#endif
/* private rt-thread spi ops function */
static rt_err_t configure(struct rt_spi_device* device, struct rt_spi_configuration* configuration);
static rt_uint32_t xfer(struct rt_spi_device* device, struct rt_spi_message* message);
static struct rt_spi_ops stm32_spi_ops =
{
configure,
xfer
};
#ifdef SPI_USE_DMA
static uint8_t dummy = 0xFF;
static void DMA_RxConfiguration(struct rt_spi_bus * spi_bus,
struct rt_spi_message* message)
{
struct stm32f4_spi *f4_spi = (struct stm32f4_spi *)spi_bus->parent.user_data;
DMA_HandleTypeDef * hdma_tx = &f4_spi->hdma_tx;
DMA_HandleTypeDef * hdma_rx = &f4_spi->hdma_rx;
HAL_DMA_DeInit(hdma_tx);
HAL_DMA_DeInit(hdma_rx);
/* Check if the DMA Stream is disabled before enabling it.
Note that this step is useful when the same Stream is used multiple times:
enabled, then disabled then re-enabled... In this case, the DMA Stream disable
will be effective only at the end of the ongoing data transfer and it will
not be possible to re-configure it before making sure that the Enable bit
has been cleared by hardware. If the Stream is used only once, this step might
be bypassed. */
while (hdma_tx->Instance->CR & DMA_SxCR_EN);
while (hdma_rx->Instance->CR & DMA_SxCR_EN);
if(message->recv_buf != RT_NULL)
{
hdma_rx->Init.MemInc = DMA_MINC_ENABLE;
}
else
{
message->recv_buf = &dummy;
hdma_rx->Init.MemInc = DMA_MINC_DISABLE;
}
HAL_DMA_Init(hdma_rx);
__HAL_LINKDMA(&f4_spi->spi_handle, hdmarx, f4_spi->hdma_rx);
if(message->send_buf != RT_NULL)
{
hdma_tx->Init.MemInc = DMA_MINC_ENABLE;
}
else
{
dummy = 0xFF;
message->send_buf = &dummy;
hdma_tx->Init.MemInc = DMA_MINC_DISABLE;
}
HAL_DMA_Init(hdma_tx);
__HAL_LINKDMA(&f4_spi->spi_handle, hdmatx, f4_spi->hdma_tx);
/* NVIC configuration for DMA transfer complete interrupt*/
HAL_NVIC_SetPriority(f4_spi->hdma_tx_irq, 0, 1);
HAL_NVIC_EnableIRQ(f4_spi->hdma_tx_irq);
/* NVIC configuration for DMA transfer complete interrupt*/
HAL_NVIC_SetPriority(f4_spi->hdma_rx_irq, 0, 0);
HAL_NVIC_EnableIRQ(f4_spi->hdma_rx_irq);
}
#endif
static rt_err_t configure(struct rt_spi_device* device,
struct rt_spi_configuration* configuration)
{
struct rt_spi_bus * spi_bus = (struct rt_spi_bus *)device->bus;
struct stm32f4_spi *f4_spi = (struct stm32f4_spi *)spi_bus->parent.user_data;
SPI_HandleTypeDef * SpiHandle = &f4_spi->spi_handle;
RT_ASSERT(device != RT_NULL);
RT_ASSERT(configuration != RT_NULL);
/* data_width */
if(configuration->data_width <= 8)
{
SpiHandle->Init.DataSize = SPI_DATASIZE_8BIT;
}
else if(configuration->data_width <= 16)
{
SpiHandle->Init.DataSize = SPI_DATASIZE_16BIT;
}
else
{
return RT_EIO;
}
/* baudrate */
{
uint32_t SPI_APB_CLOCK;
uint32_t max_hz;
max_hz = configuration->max_hz;
DEBUG_PRINTF("sys freq: %d\n", HAL_RCC_GetSysClockFreq());
DEBUG_PRINTF("pclk2 freq: %d\n", HAL_RCC_GetPCLK2Freq());
SPI_APB_CLOCK = HAL_RCC_GetPCLK2Freq();
if(max_hz >= SPI_APB_CLOCK/2)
{
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
}
else if(max_hz >= SPI_APB_CLOCK/4)
{
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
}
else if(max_hz >= SPI_APB_CLOCK/8)
{
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
}
else if(max_hz >= SPI_APB_CLOCK/16)
{
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
}
else if(max_hz >= SPI_APB_CLOCK/32)
{
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_32;
}
else if(max_hz >= SPI_APB_CLOCK/64)
{
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_64;
}
else if(max_hz >= SPI_APB_CLOCK/128)
{
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_128;
}
else
{
/* min prescaler 256 */
SpiHandle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
}
} /* baudrate */
/* CPOL */
if(configuration->mode & RT_SPI_CPOL)
{
SpiHandle->Init.CLKPolarity = SPI_POLARITY_HIGH;
}
else
{
SpiHandle->Init.CLKPolarity = SPI_POLARITY_LOW;
}
/* CPHA */
if(configuration->mode & RT_SPI_CPHA)
{
SpiHandle->Init.CLKPhase = SPI_PHASE_2EDGE;
}
else
{
SpiHandle->Init.CLKPhase = SPI_PHASE_1EDGE;
}
/* MSB or LSB */
if(configuration->mode & RT_SPI_MSB)
{
SpiHandle->Init.FirstBit = SPI_FIRSTBIT_MSB;
}
else
{
SpiHandle->Init.FirstBit = SPI_FIRSTBIT_LSB;
}
SpiHandle->Init.Direction = SPI_DIRECTION_2LINES;
SpiHandle->Init.Mode = SPI_MODE_MASTER;
SpiHandle->Init.NSS = SPI_NSS_SOFT;
SpiHandle->Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
SpiHandle->Init.TIMode = SPI_TIMODE_DISABLE;
/* init SPI */
if (HAL_SPI_Init(SpiHandle) != HAL_OK)
{
return RT_ERROR;
}
/* Enable SPI_MASTER */
__HAL_SPI_ENABLE(SpiHandle);
DEBUG_PRINTF("spi configuration\n");
return RT_EOK;
};
static rt_uint32_t xfer(struct rt_spi_device* device, struct rt_spi_message* message)
{
struct rt_spi_bus * stm32_spi_bus = (struct rt_spi_bus *)device->bus;
struct stm32f4_spi *f4_spi = (struct stm32f4_spi *)stm32_spi_bus->parent.user_data;
struct rt_spi_configuration * config = &device->config;
SPI_TypeDef * SPI = f4_spi->spi_handle.Instance;
struct stm32_spi_cs * stm32_spi_cs = device->parent.user_data;
rt_uint32_t size = message->length;
RT_ASSERT(device != NULL);
RT_ASSERT(message != NULL);
/* take CS */
if(message->cs_take)
{
HAL_GPIO_WritePin(stm32_spi_cs->GPIOx, stm32_spi_cs->GPIO_Pin, GPIO_PIN_RESET);
}
#ifdef SPI_USE_DMA
if(message->length > 32)
{
if(config->data_width <= 8)
{
HAL_StatusTypeDef state;
DEBUG_PRINTF("spi dma transfer start\n");
DMA_RxConfiguration(stm32_spi_bus, message);
DEBUG_PRINTF("dma configuration finish , send buf %X, rec buf %X, length: %d\n",
(uint32_t)message->send_buf, (uint32_t)message->recv_buf, message->length);
state = HAL_SPI_TransmitReceive_DMA(&f4_spi->spi_handle,
(uint8_t*)message->send_buf,
(uint8_t*)message->recv_buf,
message->length);
if (state != HAL_OK)
{
DEBUG_PRINTF("spi flash configuration error : %d\n", state);
message->length = 0;
//while(1);
}
else
{
DEBUG_PRINTF("spi dma transfer finish\n");
}
while (HAL_SPI_GetState(&f4_spi->spi_handle) != HAL_SPI_STATE_READY);
DEBUG_PRINTF("spi get state finish\n");
}
else
{
// Todo
}
}
else
#endif
{
if(config->data_width <= 8)
{
const rt_uint8_t * send_ptr = message->send_buf;
rt_uint8_t * recv_ptr = message->recv_buf;
while(size--)
{
rt_uint8_t data = 0xFF;
if(send_ptr != RT_NULL)
{
data = *send_ptr++;
}
// Todo: replace register read/write by stm32f4 lib
//Wait until the transmit buffer is empty
while ((SPI->SR & SPI_FLAG_TXE) == RESET);
// Send the byte
SPI->DR = data;
//Wait until a data is received
while ((SPI->SR & SPI_FLAG_RXNE) == RESET);
// Get the received data
data = SPI->DR;
if(recv_ptr != RT_NULL)
{
*recv_ptr++ = data;
}
}
}
else if(config->data_width <= 16)
{
const rt_uint16_t * send_ptr = message->send_buf;
rt_uint16_t * recv_ptr = message->recv_buf;
while(size--)
{
rt_uint16_t data = 0xFF;
if(send_ptr != RT_NULL)
{
data = *send_ptr++;
}
//Wait until the transmit buffer is empty
while ((SPI->SR & SPI_FLAG_TXE) == RESET);
// Send the byte
SPI->DR = data;
//Wait until a data is received
while ((SPI->SR & SPI_FLAG_RXNE) == RESET);
// Get the received data
data = SPI->DR;
if(recv_ptr != RT_NULL)
{
*recv_ptr++ = data;
}
}
}
}
/* release CS */
if(message->cs_release)
{
//GPIO_SetBits(stm32_spi_cs->GPIOx, stm32_spi_cs->GPIO_Pin);
HAL_GPIO_WritePin(stm32_spi_cs->GPIOx, stm32_spi_cs->GPIO_Pin, GPIO_PIN_SET);
}
return message->length;
};
#ifdef RT_USING_SPI1
static struct stm32f4_spi stm32f4_spi1 =
{
/* .spi_handle = */{
/* .Instance = */ SPI1,
},
/* .hdma_rx = */ {
DMA2_Stream2,
DMA_CHANNEL_3,
},
/* .hdma_rx_irq = */ DMA2_Stream2_IRQn,
/* .hdma_tx = */{
DMA2_Stream3,
DMA_CHANNEL_3,
},
/* .hdma_tx_irq = */ DMA2_Stream3_IRQn,
};
static struct rt_spi_bus spi1_bus;
/**
* @brief This function handles DMA Rx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream2_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi1.spi_handle.hdmarx);
}
/**
* @brief This function handles DMA Tx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream3_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi1.spi_handle.hdmatx);
}
#endif
#ifdef RT_USING_SPI2
struct stm32f4_spi stm32f4_spi2 =
{
/* .spi_handle = */{
/* .Instance = */ SPI2,
},
/* .hdma_rx = */ {
DMA1_Stream3,
DMA_CHANNEL_0,
},
/* .hdma_rx_irq = */ DMA1_Stream3_IRQn,
/* .hdma_tx = */{
DMA1_Stream4,
DMA_CHANNEL_0,
},
/* .hdma_tx_irq = */ DMA1_Stream4_IRQn,
};
static struct rt_spi_bus spi2_bus;
/**
* @brief This function handles DMA Rx interrupt request.
* @param None
* @retval None
*/
void DMA1_Stream3_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi2.spi_handle.hdmarx);
}
/**
* @brief This function handles DMA Tx interrupt request.
* @param None
* @retval None
*/
void DMA1_Stream4_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi2.spi_handle.hdmatx);
}
#endif
#ifdef RT_USING_SPI3
struct stm32f4_spi stm32f4_spi3 =
{
/* .spi_handle = */{
/* .Instance = */ SPI3,
},
/* .hdma_rx = */ {
DMA1_Stream0,
DMA_CHANNEL_0,
},
/* .hdma_rx_irq = */ DMA1_Stream0_IRQn,
/* .hdma_tx = */{
DMA1_Stream2,
DMA_CHANNEL_0,
},
/* .hdma_tx_irq = */ DMA1_Stream2_IRQn,
};
static struct rt_spi_bus spi3_bus;
/**
* @brief This function handles DMA Rx interrupt request.
* @param None
* @retval None
*/
void DMA1_Stream0_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi3.spi_handle.hdmarx);
}
/**
* @brief This function handles DMA Tx interrupt request.
* @param None
* @retval None
*/
void DMA1_Stream2_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi3.spi_handle.hdmatx);
}
#endif
#ifdef RT_USING_SPI4
struct stm32f4_spi stm32f4_spi4 =
{
/* .spi_handle = */{
/* .Instance = */ SPI5,
},
/* .hdma_rx = */ {
DMA2_Stream0,
DMA_CHANNEL_4,
},
/* .hdma_rx_irq = */ DMA2_Stream0_IRQn,
/* .hdma_tx = */{
DMA2_Stream1,
DMA_CHANNEL_4,
},
/* .hdma_tx_irq = */ DMA2_Stream1_IRQn,
};
static struct rt_spi_bus spi4_bus;
/**
* @brief This function handles DMA Rx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream0_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi4.spi_handle.hdmarx);
}
/**
* @brief This function handles DMA Tx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream1_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi4.spi_handle.hdmatx);
}
#endif
#ifdef RT_USING_SPI5
struct stm32f4_spi stm32f4_spi5 =
{
/* .spi_handle = */{
/* .Instance = */ SPI5,
},
/* .hdma_rx = */ {
DMA2_Stream3,
DMA_CHANNEL_2,
},
/* .hdma_rx_irq = */ DMA2_Stream3_IRQn,
/* .hdma_tx = */{
DMA2_Stream4,
DMA_CHANNEL_2,
},
/* .hdma_tx_irq = */ DMA2_Stream4_IRQn,
};
static struct rt_spi_bus spi5_bus;
/**
* @brief This function handles DMA Rx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream3_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi5.spi_handle.hdmarx);
}
/**
* @brief This function handles DMA Tx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream4_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi5.spi_handle.hdmatx);
}
#endif
#ifdef RT_USING_SPI6
struct stm32f4_spi stm32f4_spi6 =
{
/* .spi_handle = */{
/* .Instance = */ SPI5,
},
/* .hdma_rx = */ {
DMA2_Stream6,
DMA_CHANNEL_2,
},
/* .hdma_rx_irq = */ DMA2_Stream6_IRQn,
/* .hdma_tx = */{
DMA2_Stream5,
DMA_CHANNEL_2,
},
/* .hdma_tx_irq = */ DMA2_Stream5_IRQn,
};
static struct rt_spi_bus spi6_bus;
/**
* @brief This function handles DMA Rx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream6_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi6.spi_handle.hdmarx);
}
/**
* @brief This function handles DMA Tx interrupt request.
* @param None
* @retval None
*/
void DMA2_Stream5_IRQHandler(void)
{
HAL_DMA_IRQHandler(stm32f4_spi6.spi_handle.hdmatx);
}
#endif
/** \brief init and register stm32 spi bus.
*
* \param SPI: STM32 SPI, e.g: SPI1,SPI2,SPI3.
* \param spi_bus_name: spi bus name, e.g: "spi1"
* \return
*
*/
rt_err_t stm32_spi_bus_register(SPI_TypeDef * SPI,
//struct stm32_spi_bus * stm32_spi,
const char * spi_bus_name)
{
struct stm32f4_spi * p_spi_bus;
struct rt_spi_bus * spi_bus;
RT_ASSERT(SPI != RT_NULL);
//RT_ASSERT(stm32_spi != RT_NULL);
RT_ASSERT(spi_bus_name != RT_NULL);
#ifdef RT_USING_SPI1
if(SPI == SPI1)
{
#ifdef SPI_USE_DMA
__HAL_RCC_DMA2_CLK_ENABLE();
p_spi_bus = &stm32f4_spi1;
#endif
__HAL_RCC_SPI1_CLK_ENABLE();
spi_bus = &spi1_bus;
}
#endif
#ifdef RT_USING_SPI2
if(SPI == SPI2)
{
#ifdef SPI_USE_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
p_spi_bus = &stm32f4_spi2;
#endif
__HAL_RCC_SPI2_CLK_ENABLE();
spi_bus = &spi2_bus;
}
#endif
#ifdef RT_USING_SPI3
if(SPI == SPI3)
{
//stm32_spi->spi_handle.Instance = SPI3;
#ifdef SPI_USE_DMA
__HAL_RCC_DMA1_CLK_ENABLE();
p_spi_bus = &stm32f4_spi3;
#endif
__HAL_RCC_SPI3_CLK_ENABLE();
spi_bus = &spi3_bus;
}
#endif
#ifdef RT_USING_SPI4
if(SPI == SPI4)
{
#ifdef SPI_USE_DMA
__HAL_RCC_DMA2_CLK_ENABLE();
#endif
__HAL_RCC_SPI4_CLK_ENABLE();
spi_bus = &spi4_bus;
}
#endif
#ifdef RT_USING_SPI5
if(SPI == SPI5)
{
#ifdef SPI_USE_DMA
__HAL_RCC_DMA2_CLK_ENABLE();
p_spi_bus = &stm32f4_spi5;
#endif
__HAL_RCC_SPI5_CLK_ENABLE();
spi_bus = &spi5_bus;
}
#endif
#ifdef RT_USING_SPI6
if(SPI == SPI6)
{
#ifdef SPI_USE_DMA
__HAL_RCC_DMA2_CLK_ENABLE();
p_spi_bus = &stm32f4_spi5;
#endif
__HAL_RCC_SPI6_CLK_ENABLE();
spi_bus = &spi6_bus;
}
#endif
if ( (SPI != SPI1) && (SPI != SPI2) && (SPI != SPI3)
&& (SPI != SPI4) && (SPI != SPI5) && (SPI != SPI6))
{
return RT_ENOSYS;
}
/* Configure the DMA handler for Transmission process */
p_spi_bus->hdma_tx.Init.Direction = DMA_MEMORY_TO_PERIPH;
p_spi_bus->hdma_tx.Init.PeriphInc = DMA_PINC_DISABLE;
//p_spi_bus->hdma_tx.Init.MemInc = DMA_MINC_ENABLE;
p_spi_bus->hdma_tx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
p_spi_bus->hdma_tx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
p_spi_bus->hdma_tx.Init.Mode = DMA_NORMAL;
p_spi_bus->hdma_tx.Init.Priority = DMA_PRIORITY_LOW;
p_spi_bus->hdma_tx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
p_spi_bus->hdma_tx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
p_spi_bus->hdma_tx.Init.MemBurst = DMA_MBURST_INC4;
p_spi_bus->hdma_tx.Init.PeriphBurst = DMA_PBURST_INC4;
p_spi_bus->hdma_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
p_spi_bus->hdma_rx.Init.PeriphInc = DMA_PINC_DISABLE;
//p_spi_bus->hdma_rx.Init.MemInc = DMA_MINC_ENABLE;
p_spi_bus->hdma_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_BYTE;
p_spi_bus->hdma_rx.Init.MemDataAlignment = DMA_MDATAALIGN_BYTE;
p_spi_bus->hdma_rx.Init.Mode = DMA_NORMAL;
p_spi_bus->hdma_rx.Init.Priority = DMA_PRIORITY_HIGH;
p_spi_bus->hdma_rx.Init.FIFOMode = DMA_FIFOMODE_DISABLE;
p_spi_bus->hdma_rx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
p_spi_bus->hdma_rx.Init.MemBurst = DMA_MBURST_INC4;
p_spi_bus->hdma_rx.Init.PeriphBurst = DMA_PBURST_INC4;
spi_bus->parent.user_data = &stm32f4_spi5;
return rt_spi_bus_register(spi_bus, spi_bus_name, &stm32_spi_ops);
}
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