/rtt-1.0.2/bsp/sz_iv_f107vct/drivers/rt_stm32f10x_spi.c
C | 435 lines | 327 code | 59 blank | 49 comment | 51 complexity | b9d669acb0a776d0f6599cd7c3320de3 MD5 | raw file
Possible License(s): GPL-2.0
- #include "rt_stm32f10x_spi.h"
-
- 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 USING_SPI1
- static struct stm32_spi_bus stm32_spi_bus_1;
- #endif /* #ifdef USING_SPI1 */
-
- #ifdef USING_SPI2
- static struct stm32_spi_bus stm32_spi_bus_2;
- #endif /* #ifdef USING_SPI2 */
-
- #ifdef USING_SPI3
- static struct stm32_spi_bus stm32_spi_bus_3;
- #endif /* #ifdef USING_SPI3 */
-
- //------------------ DMA ------------------
- #ifdef SPI_USE_DMA
- static uint8_t dummy = 0xFF;
- #endif
-
- #ifdef SPI_USE_DMA
- static void DMA_Configuration(struct stm32_spi_bus * stm32_spi_bus, const void * send_addr, void * recv_addr, rt_size_t size)
- {
- DMA_InitTypeDef DMA_InitStructure;
-
- DMA_ClearFlag(stm32_spi_bus->DMA_Channel_RX_FLAG_TC
- | stm32_spi_bus->DMA_Channel_RX_FLAG_TE
- | stm32_spi_bus->DMA_Channel_TX_FLAG_TC
- | stm32_spi_bus->DMA_Channel_TX_FLAG_TE);
-
- /* RX channel configuration */
- DMA_Cmd(stm32_spi_bus->DMA_Channel_RX, DISABLE);
- DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&(stm32_spi_bus->SPI->DR));
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
- DMA_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
- DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
- DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
-
- DMA_InitStructure.DMA_BufferSize = size;
-
- if(recv_addr != RT_NULL)
- {
- DMA_InitStructure.DMA_MemoryBaseAddr = (u32) recv_addr;
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
- }
- else
- {
- DMA_InitStructure.DMA_MemoryBaseAddr = (u32) (&dummy);
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
- }
-
- DMA_Init(stm32_spi_bus->DMA_Channel_RX, &DMA_InitStructure);
-
- DMA_Cmd(stm32_spi_bus->DMA_Channel_RX, ENABLE);
-
- /* TX channel configuration */
- DMA_Cmd(stm32_spi_bus->DMA_Channel_TX, DISABLE);
- DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)(&(stm32_spi_bus->SPI->DR));
- DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
- DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
- DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
- DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
- DMA_InitStructure.DMA_Priority = DMA_Priority_Medium;
- DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
- DMA_InitStructure.DMA_M2M = DMA_M2M_Disable;
-
- DMA_InitStructure.DMA_BufferSize = size;
-
- if(send_addr != RT_NULL)
- {
- DMA_InitStructure.DMA_MemoryBaseAddr = (u32)send_addr;
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
- }
- else
- {
- DMA_InitStructure.DMA_MemoryBaseAddr = (u32)(&dummy);;
- DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Disable;
- }
-
- DMA_Init(stm32_spi_bus->DMA_Channel_TX, &DMA_InitStructure);
-
- DMA_Cmd(stm32_spi_bus->DMA_Channel_TX, ENABLE);
- }
- #endif
-
- rt_inline uint16_t get_spi_BaudRatePrescaler(rt_uint32_t max_hz)
- {
- uint16_t SPI_BaudRatePrescaler;
-
- /* STM32F10x SPI MAX 18Mhz */
- if(max_hz >= SystemCoreClock/2 && SystemCoreClock/2 <= 18000000)
- {
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
- }
- else if(max_hz >= SystemCoreClock/4)
- {
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_4;
- }
- else if(max_hz >= SystemCoreClock/8)
- {
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8;
- }
- else if(max_hz >= SystemCoreClock/16)
- {
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_16;
- }
- else if(max_hz >= SystemCoreClock/32)
- {
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
- }
- else if(max_hz >= SystemCoreClock/64)
- {
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_64;
- }
- else if(max_hz >= SystemCoreClock/128)
- {
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
- }
- else
- {
- /* min prescaler 256 */
- SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_256;
- }
-
- return SPI_BaudRatePrescaler;
- }
-
- static rt_err_t configure(struct rt_spi_device* device, struct rt_spi_configuration* configuration)
- {
- struct stm32_spi_bus * stm32_spi_bus = (struct stm32_spi_bus *)device->bus;
- SPI_InitTypeDef SPI_InitStructure;
-
- SPI_StructInit(&SPI_InitStructure);
- /* data_width */
- if(configuration->data_width <= 8)
- {
- SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
- }
- else if(configuration->data_width <= 16)
- {
- SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;
- }
- else
- {
- return RT_EIO;
- }
- /* baudrate */
- SPI_InitStructure.SPI_BaudRatePrescaler = get_spi_BaudRatePrescaler(configuration->max_hz);
- /* CPOL */
- if(configuration->mode & RT_SPI_CPOL)
- {
- SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
- }
- else
- {
- SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
- }
- /* CPHA */
- if(configuration->mode & RT_SPI_CPHA)
- {
- SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
- }
- else
- {
- SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
- }
- /* MSB or LSB */
- if(configuration->mode & RT_SPI_MSB)
- {
- SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
- }
- else
- {
- SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_LSB;
- }
- SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
- SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
- SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
-
- /* init SPI */
- SPI_I2S_DeInit(stm32_spi_bus->SPI);
- SPI_Init(stm32_spi_bus->SPI, &SPI_InitStructure);
- /* Enable SPI_MASTER */
- SPI_Cmd(stm32_spi_bus->SPI, ENABLE);
- SPI_CalculateCRC(stm32_spi_bus->SPI, DISABLE);
-
- return RT_EOK;
- };
-
- static rt_uint32_t xfer(struct rt_spi_device* device, struct rt_spi_message* message)
- {
- struct stm32_spi_bus * stm32_spi_bus = (struct stm32_spi_bus *)device->bus;
- struct rt_spi_configuration * config = &device->config;
- SPI_TypeDef * SPI = stm32_spi_bus->SPI;
- struct stm32_spi_cs * stm32_spi_cs = device->parent.user_data;
- rt_uint32_t size = message->length;
-
- /* take CS */
- if(message->cs_take)
- {
- GPIO_ResetBits(stm32_spi_cs->GPIOx, stm32_spi_cs->GPIO_Pin);
- }
-
- #ifdef SPI_USE_DMA
- if(message->length > 32)
- {
- if(config->data_width <= 8)
- {
- DMA_Configuration(stm32_spi_bus, message->send_buf, message->recv_buf, message->length);
- SPI_I2S_DMACmd(SPI, SPI_I2S_DMAReq_Tx | SPI_I2S_DMAReq_Rx, ENABLE);
- while (DMA_GetFlagStatus(stm32_spi_bus->DMA_Channel_RX_FLAG_TC) == RESET
- || DMA_GetFlagStatus(stm32_spi_bus->DMA_Channel_TX_FLAG_TC) == RESET);
- SPI_I2S_DMACmd(SPI, SPI_I2S_DMAReq_Tx | SPI_I2S_DMAReq_Rx, DISABLE);
- }
- // rt_memcpy(buffer,_spi_flash_buffer,DMA_BUFFER_SIZE);
- // buffer += DMA_BUFFER_SIZE;
- }
- 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++;
- }
-
- //Wait until the transmit buffer is empty
- while (SPI_I2S_GetFlagStatus(SPI, SPI_I2S_FLAG_TXE) == RESET);
- // Send the byte
- SPI_I2S_SendData(SPI, data);
-
- //Wait until a data is received
- while (SPI_I2S_GetFlagStatus(SPI, SPI_I2S_FLAG_RXNE) == RESET);
- // Get the received data
- data = SPI_I2S_ReceiveData(SPI);
-
- 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_I2S_GetFlagStatus(SPI, SPI_I2S_FLAG_TXE) == RESET);
- // Send the byte
- SPI_I2S_SendData(SPI, data);
-
- //Wait until a data is received
- while (SPI_I2S_GetFlagStatus(SPI, SPI_I2S_FLAG_RXNE) == RESET);
- // Get the received data
- data = SPI_I2S_ReceiveData(SPI);
-
- 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);
- }
-
- return message->length;
- };
-
- void rt_stm32f10x_spi_init(void)
- {
- #ifdef USING_SPI1
- /* SPI1 config */
- {
- GPIO_InitTypeDef GPIO_InitStructure;
-
- /* Enable SPI1 Periph clock */
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOA
- | RCC_APB2Periph_AFIO | RCC_APB2Periph_SPI1,
- ENABLE);
-
- #ifdef SPI_USE_DMA
- /* Enable the DMA1 Clock */
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
- #endif /* #ifdef SPI_USE_DMA */
-
- /* Configure SPI1 pins: PA5-SCK, PA6-MISO and PA7-MOSI */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_7;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_Init(GPIOA, &GPIO_InitStructure);
- } /* SPI1 config */
-
- /* register SPI1 */
- {
- stm32_spi_bus_1.SPI = SPI1;
- #ifdef SPI_USE_DMA
- stm32_spi_bus_1.DMA_Channel_RX = DMA1_Channel2;
- stm32_spi_bus_1.DMA_Channel_TX = DMA1_Channel3;
- stm32_spi_bus_1.DMA_Channel_RX_FLAG_TC = DMA1_FLAG_TC2;
- stm32_spi_bus_1.DMA_Channel_RX_FLAG_TE = DMA1_FLAG_TE2;
- stm32_spi_bus_1.DMA_Channel_TX_FLAG_TC = DMA1_FLAG_TC3;
- stm32_spi_bus_1.DMA_Channel_TX_FLAG_TE = DMA1_FLAG_TE3;
- #endif /* #ifdef SPI_USE_DMA */
- rt_spi_bus_register(&stm32_spi_bus_1.parent, "spi1", &stm32_spi_ops);
- } /* register SPI1 */
- #endif /* #ifdef USING_SPI1 */
-
- #ifdef USING_SPI2
- /* SPI config */
- {
- GPIO_InitTypeDef GPIO_InitStructure;
-
- /* Enable SPI2 Periph clock */
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
- /*!< Enable the SPI and GPIO clock */
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
-
- #ifdef SPI_USE_DMA
- /* Enable the DMA1 Clock */
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
- #endif
- /* Configure SPI2 pins: PB13-SCK, PB14-MISO and PB15-MOSI */
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
-
- /*!< SPI SCK pin configuration */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; /* PB13 SPI2_SCK */
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- /*!< SPI MISO pin configuration */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; /* PB14 SPI2_MISO */
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- /*!< SPI MOSI pin configuration */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; /* PB15 SPI2_MOSI */
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- } /* SPI config */
-
- /* register SPI */
- {
- stm32_spi_bus_2.SPI = SPI2;
- #ifdef SPI_USE_DMA
- stm32_spi_bus_2.DMA_Channel_RX = DMA1_Channel4;
- stm32_spi_bus_2.DMA_Channel_TX = DMA1_Channel5;
- stm32_spi_bus_2.DMA_Channel_RX_FLAG_TC = DMA1_FLAG_TC4;
- stm32_spi_bus_2.DMA_Channel_RX_FLAG_TE = DMA1_FLAG_TE4;
- stm32_spi_bus_2.DMA_Channel_TX_FLAG_TC = DMA1_FLAG_TC5;
- stm32_spi_bus_2.DMA_Channel_TX_FLAG_TE = DMA1_FLAG_TE5;
- #endif /* #ifdef SPI_USE_DMA */
- rt_spi_bus_register(&stm32_spi_bus_2.parent, "spi2", &stm32_spi_ops);
- }/* register SPI */
- #endif /* #ifdef USING_SPI2 */
-
- #ifdef USING_SPI3
- /* SPI config */
- {
- GPIO_InitTypeDef GPIO_InitStructure;
-
- /* Enable SPI2 Periph clock */
- RCC_APB2PeriphClockCmd(RCC_APB2Periph_GPIOB,ENABLE);
- /*!< Enable the SPI and GPIO clock */
- RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI2, ENABLE);
-
- #ifdef SPI_USE_DMA
- /* Enable the DMA2 Clock */
- RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);
- #endif
- /* Configure SPI2 pins: PB13-SCK, PB14-MISO and PB15-MOSI */
- GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
- GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
-
- /*!< SPI SCK pin configuration */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_13; /* PB13 SPI2_SCK */
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- /*!< SPI MISO pin configuration */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_14; /* PB14 SPI2_MISO */
- GPIO_Init(GPIOB, &GPIO_InitStructure);
-
- /*!< SPI MOSI pin configuration */
- GPIO_InitStructure.GPIO_Pin = GPIO_Pin_15; /* PB15 SPI2_MOSI */
- GPIO_Init(GPIOB, &GPIO_InitStructure);
- } /* SPI config */
-
- /* register SPI */
- {
- stm32_spi_bus_3.SPI = SPI2;
- #ifdef SPI_USE_DMA
- stm32_spi_bus_3.DMA_Channel_RX = DMA2_Channel1;
- stm32_spi_bus_3.DMA_Channel_TX = DMA2_Channel2;
- stm32_spi_bus_3.DMA_Channel_RX_FLAG_TC = DMA2_FLAG_TC1;
- stm32_spi_bus_3.DMA_Channel_RX_FLAG_TE = DMA2_FLAG_TE1;
- stm32_spi_bus_3.DMA_Channel_TX_FLAG_TC = DMA2_FLAG_TC2;
- stm32_spi_bus_3.DMA_Channel_TX_FLAG_TE = DMA2_FLAG_TE2;
- #endif /* #ifdef SPI_USE_DMA */
- rt_spi_bus_register(&stm32_spi_bus_3.parent, "spi3", &stm32_spi_ops);
- }/* register SPI */
- #endif /* #ifdef USING_SPI3 */
- }