External Camera with SPI bus

OpenMV Boards
11

Well, I found the root cause…
I thought that SPI GPIO will be configured after call HAL_SPI_Init(), but when I checked its detail, I found out that HAL_SPI_MspInit is not implemented.
So I need to manually configure the GPIO.

Below is my initial code, after that, my SPI2 controls are work fine.
(Post here because I think that may help some people…)

    // Init GPIO for SPI2.
    GPIO_InitTypeDef GPIO_InitStructure;

    __HAL_RCC_SPI2_CLK_ENABLE();

    GPIO_InitStructure.Pin = MISO_PIN | MOSI_PIN | SCLK_PIN;
    GPIO_InitStructure.Pull  = GPIO_PULLUP;
    GPIO_InitStructure.Speed = GPIO_SPEED_HIGH;
    GPIO_InitStructure.Mode  = GPIO_MODE_AF_PP;
    GPIO_InitStructure.Alternate = GPIO_AF5_SPI2;
    HAL_GPIO_Init(SPI_PORT, &GPIO_InitStructure);

    // Init SPI
    memset(&SPIHandle, 0, sizeof(SPIHandle));
    SPIHandle.Instance               = SPI2;
    SPIHandle.Init.Mode              = SPI_MODE_MASTER;
    SPIHandle.Init.Direction         = SPI_DIRECTION_2LINES;
    SPIHandle.Init.DataSize          = SPI_DATASIZE_8BIT;
    SPIHandle.Init.CLKPolarity       = SPI_POLARITY_HIGH;
    SPIHandle.Init.CLKPhase          = SPI_CR1_CPHA;
    SPIHandle.Init.NSS               = SPI_NSS_SOFT;
    SPIHandle.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
    SPIHandle.Init.FirstBit          = SPI_FIRSTBIT_MSB;
    SPIHandle.Init.TIMode            = SPI_TIMODE_DISABLED;
    SPIHandle.Init.CRCCalculation    = SPI_CRCCALCULATION_DISABLED;
    SPIHandle.Init.CRCPolynomial     = 0;
    if (HAL_SPI_Init(&SPIHandle) != HAL_OK) 
    {
        /* Initialization Error */
        printf("HAL_SPI_Init() failed.\n");
        BREAK();
    }

    // Init GPIO for SPI SS(CS) pin, software control.
    GPIO_InitStructure.Pin = CS_PIN;
    GPIO_InitStructure.Mode = GPIO_MODE_OUTPUT_PP;
    GPIO_InitStructure.Pull = GPIO_PULLUP;
    GPIO_InitStructure.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
    HAL_GPIO_Init(CS_PORT, &GPIO_InitStructure);