Posted on March 20, 2017 at 13:57Hi all,
I am not able to get SPI working on stm32l151rbt6a. I have posted my initialization code below.
/* SPI1 init function */
void MX_SPI1_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct;
SPI_HandleTypeDef hspi1;
__SPI1_CLK_ENABLE(); // clock ok
/**SPI1 GPIO Configuration
PA5 ------> SPI1_SCK
PA6 ------> SPI1_MISO
PA7 ------> SPI1_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_VERY_LOW;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI1;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLED;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
HAL_SPI_Init(&hspi1);
__HAL_SPI_ENABLE(&hspi1);
}
I am writing a byte to DR and waiting for RXNE bit to set. RXNE bit is never setting. What could be the problem? I have spent a lot of time trying various options but to no avail. Any help will be highly appreciated. Thank you in advance.
