void HAL_SPI_MspInit(SPI_HandleTypeDef *hspi)
{
GPIO_InitTypeDef GPIO_InitStruct;
if(hspi->Instance == SPI4) //Plan board, SPI Slave
{
//Enable GPIO clock
__GPIOE_CLK_ENABLE();
//Enable peripheral clock
__SPI4_CLK_ENABLE();
//SPI4 pins:
//=-=-=-=-=
//NSS4: PE4
//MOSI4: PE6
//MISO4: PE5
//SCK4: PE2
//All but NSS:
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_5|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI4;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
//It seems that NSS can't be used as a good CS => set as input, ISR on change
GPIO_InitStruct.Pin = GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
//Enable interrupts/NVIC for SPI data lines
HAL_NVIC_SetPriority(SPI4_IRQn, 0, 1);
HAL_NVIC_EnableIRQ(SPI4_IRQn);
//And for the the CS pin
HAL_NVIC_SetPriority(EXTI4_IRQn, EXT4_IRQ_CHANNEL, EXT4_IRQ_SUBCHANNEL);
HAL_NVIC_EnableIRQ(EXTI4_IRQn);
}
else if(hspi->Instance == SPI5) //FLASH, SPI Master
{
//Enable GPIO clock
__GPIOF_CLK_ENABLE();
//Enable peripheral clock
__SPI5_CLK_ENABLE();
//SPI5 pins:
//=-=-=-=-=
//NSS5: PF6
//MOSI5: PF9
//MISO5: PF8
//SCK5: PF7
//All but NSS:
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7|GPIO_PIN_8|GPIO_PIN_9;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI5;
HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
//Enable interrupts/NVIC for SPI data lines
HAL_NVIC_SetPriority(SPI5_IRQn, 7, 7);
HAL_NVIC_EnableIRQ(SPI5_IRQn);
}
else if(hspi->Instance == SPI6) //Expansion connector, SPI Master
{
//Enable GPIO clock
__GPIOG_CLK_ENABLE();
//Enable peripheral clock
__SPI6_CLK_ENABLE();
//SPI6 pins:
//=-=-=-=-=
//NSS6: PG8
//MOSI6: PG14
//MISO6: PG12
//SCK6: PG13
//All but NSS:
GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_FAST;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI6;
HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
//Enable interrupts/NVIC for SPI data lines
HAL_NVIC_SetPriority(SPI6_IRQn, 7, 7);
HAL_NVIC_EnableIRQ(SPI6_IRQn);
}
else
{
//Trying to configure a port that doesn't exist, flag the error
flexsea_error(SE_INVALID_SPI);
}
}
void spi_init(spi_t *obj, PinName mosi, PinName miso, PinName sclk)
{
// Determine the SPI to use
SPIName spi_mosi = (SPIName)pinmap_peripheral(mosi, PinMap_SPI_MOSI);
SPIName spi_miso = (SPIName)pinmap_peripheral(miso, PinMap_SPI_MISO);
SPIName spi_sclk = (SPIName)pinmap_peripheral(sclk, PinMap_SPI_SCLK);
SPIName spi_data = (SPIName)pinmap_merge(spi_mosi, spi_miso);
SPIName instance = (SPIName)pinmap_merge(spi_data, spi_sclk);
MBED_ASSERT(instance != (SPIName)NC);
// Enable SPI clock and set the right module number
switch(instance) {
case SPI_1:
__SPI1_CLK_ENABLE();
obj->spi.module = 0;
break;
case SPI_2:
__SPI2_CLK_ENABLE();
obj->spi.module = 1;
break;
case SPI_3:
__SPI3_CLK_ENABLE();
obj->spi.module = 2;
break;
#if MODULES_SIZE_SPI > 3
case SPI_4:
__SPI4_CLK_ENABLE();
obj->spi.module = 3;
break;
#endif
#if MODULES_SIZE_SPI > 4
case SPI_5:
__SPI5_CLK_ENABLE();
obj->spi.module = 4;
break;
#endif
#if MODULES_SIZE_SPI > 5
case SPI_6:
__SPI6_CLK_ENABLE();
obj->spi.module = 5;
break;
#endif
default:
break;
}
// Configure the SPI pins
pinmap_pinout(mosi, PinMap_SPI_MOSI);
pinmap_pinout(miso, PinMap_SPI_MISO);
pinmap_pinout(sclk, PinMap_SPI_SCLK);
obj->spi.pin_miso = miso;
obj->spi.pin_mosi = mosi;
obj->spi.pin_sclk = sclk;
// initialize the handle for this master!
SPI_HandleTypeDef *handle = &SpiHandle[obj->spi.module];
handle->Instance = (SPI_TypeDef *)(instance);
handle->Init.Mode = SPI_MODE_MASTER;
handle->Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
handle->Init.Direction = SPI_DIRECTION_2LINES;
handle->Init.CLKPhase = SPI_PHASE_1EDGE;
handle->Init.CLKPolarity = SPI_POLARITY_LOW;
handle->Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
handle->Init.CRCPolynomial = 7;
handle->Init.DataSize = SPI_DATASIZE_8BIT;
handle->Init.FirstBit = SPI_FIRSTBIT_MSB;
handle->Init.NSS = SPI_NSS_SOFT;
handle->Init.TIMode = SPI_TIMODE_DISABLED;
DEBUG_PRINTF("SPI%u: Init\n", obj->spi.module+1);
init_spi(obj);
}
