Posted by jyi on 2015-05-02 18:47

The Initialiazation was generated by CubeMx.
The SPI1 is remapped to PB3-5 which is also a JTAG port(PB3 and PB4).

/* SPI1 init function */
void MX_SPI1_Init(void)
{

hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_4;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
HAL_SPI_Init(&hspi1);

}

oid HAL_SPI_MspInit(SPI_HandleTypeDef* hspi)
{

GPIO_InitTypeDef GPIO_InitStruct;
if(hspi->Instance==SPI1)
{
/* USER CODE BEGIN SPI1_MspInit 0 */

/* USER CODE END SPI1_MspInit 0 */
/* Peripheral clock enable */
__SPI1_CLK_ENABLE();

/**SPI1 GPIO Configuration
PB3 --> SPI1_SCK
PB4 --> SPI1_MISO
PB5 --> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_3|GPIO_PIN_5;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_4;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

__HAL_AFIO_REMAP_SPI1_ENABLE();

/* USER CODE BEGIN SPI1_MspInit 1 */

/* USER CODE END SPI1_MspInit 1 */
}
else if(hspi->Instance==SPI2)
{
/* USER CODE BEGIN SPI2_MspInit 0 */

/* USER CODE END SPI2_MspInit 0 */
/* Peripheral clock enable */
__SPI2_CLK_ENABLE();

/**SPI2 GPIO Configuration
PB13 --> SPI2_SCK
PB14 --> SPI2_MISO
PB15 --> SPI2_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_13|GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Speed = GPIO_SPEED_LOW;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

GPIO_InitStruct.Pin = GPIO_PIN_14;
GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
GPIO_InitStruct.Pull = GPIO_PULLUP;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

/* USER CODE BEGIN SPI2_MspInit 1 */

/* USER CODE END SPI2_MspInit 1 */
}
}

If I disable the JTAG port by
// disable jtag
__HAL_AFIO_REMAP_SWJ_DISABLE();
There are clock pulses on pin PB3(SCK pin), but they are very bad.

If I use SPI 1 in PA5-7(no remapping), the SPI 1 is working fine. But I need pins PA5-7 as ADC input.

Thanks.

Jyi