STM32N6 series DCMI module

[nishanth]

I am very new to this field !! So last I had posted regarding the interfacing of DCMI and I got relevent doucuments which where not enough for me to understand the DCMI module. So could you please send relevant videos of interfacing DCMI module step by step.

[KDJEM.1]

Hello @nishanth;

You can find in AN5020 "Introduction to digital camera interface (DCMI) for STM32 MCUs - Application note" and precisely in DCMI application examples section a step-by-step implementation examples.

Also, I recommend you to look at this video STM32H7 OLT - 55. Peripheral Digital Camera Interface DCMI may help you to understand the DCMI features.

Also, you can check the reference manual section 38 Digital camera interface (DCMI).

Thank you.

Kaouthar

[TheImmortal]

Hi, 

Use DCMIPP, for DCMIPP you dont need to enable DMA, DCMIPP is much better, and besides - DMA for DCMI do not work because of bug's, don't forget to add HAL_DCMIPP_MspInit routine, cubeMX do not generate and without CLK, IRQ and pinout you will get errors and DCMIPP will not work, adjust by you hw.

/* USER CODE BEGIN 4 */
void HAL_DCMIPP_MspInit(DCMIPP_HandleTypeDef *hdcmipp) {
	GPIO_InitTypeDef GPIO_InitStruct = { 0 };
	RCC_PeriphCLKInitTypeDef PeriphClkInitStruct = { 0 };
	//if (hdcmi->Instance == DCMIPP) {

	__HAL_RCC_DCMIPP_CLK_ENABLE();
    __HAL_RCC_DCMIPP_FORCE_RESET();
    __HAL_RCC_DCMIPP_RELEASE_RESET();
    HAL_NVIC_SetPriority(DCMIPP_IRQn, 3, 0);
    HAL_NVIC_EnableIRQ(DCMIPP_IRQn);

    PeriphClkInitStruct.PeriphClockSelection = RCC_PERIPHCLK_DCMIPP;
    PeriphClkInitStruct.DcmippClockSelection = RCC_DCMIPPCLKSOURCE_IC17;
    PeriphClkInitStruct.ICSelection[RCC_IC17].ClockSelection = RCC_ICCLKSOURCE_PLL3;
    PeriphClkInitStruct.ICSelection[RCC_IC17].ClockDivider = 4;
    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK) {
      Error_Handler();
    }

	__HAL_RCC_GPIOF_CLK_ENABLE();
	__HAL_RCC_GPIOA_CLK_ENABLE();
	__HAL_RCC_GPIOG_CLK_ENABLE();
	__HAL_RCC_GPIOB_CLK_ENABLE();
	__HAL_RCC_GPION_CLK_ENABLE();
	/**DCMI GPIO Configuration
	 PF1     ------> DCMI_D7
	 PA1     ------> DCMI_D0
	 PG3     ------> DCMI_HSYNC
	 PG15     ------> DCMI_D4
	 PA10     ------> DCMI_D1
	 PG1     ------> DCMI_PIXCLK
	 PG10     ------> DCMI_D2
	 PG2     ------> DCMI_D6
	 PB4(NJTRST)     ------> DCMI_VSYNC
	 PN9     ------> DCMI_D5
	 PA4     ------> DCMI_D3
	 */

	GPIO_InitStruct.Pin = GPIO_PIN_1;
	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	GPIO_InitStruct.Alternate = GPIO_AF9_DCMIPP;
	HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);

	GPIO_InitStruct.Pin = GPIO_PIN_1 | GPIO_PIN_10 | GPIO_PIN_4;
	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	GPIO_InitStruct.Alternate = GPIO_AF9_DCMIPP;
	HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

	GPIO_InitStruct.Pin = GPIO_PIN_3 | GPIO_PIN_15 | GPIO_PIN_1 | GPIO_PIN_10 | GPIO_PIN_2;
	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	GPIO_InitStruct.Alternate = GPIO_AF9_DCMIPP;
	HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

	GPIO_InitStruct.Pin = GPIO_PIN_4;
	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	GPIO_InitStruct.Alternate = GPIO_AF9_DCMIPP;
	HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

	GPIO_InitStruct.Pin = GPIO_PIN_9;
	GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
	GPIO_InitStruct.Pull = GPIO_NOPULL;
	GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
	GPIO_InitStruct.Alternate = GPIO_AF10_DCMIPP;
	HAL_GPIO_Init(GPION, &GPIO_InitStruct);
}