STM32H743VIT6 DCMI & JPEG encoder data validation interfacing with MT9M114 sensor.
Hi,
I would like to ask a question about DCMI. I am working on one task with STM32H743VIT6 MCU. My task is take an image from MT9M114 sensor using DCMI.
MT9M114 is a camera sensor to capture images. Interfacing MT9M114 sensor through DCMI with STM32H743VIT6.
I Configured camera sensor through I2C like (Pixel format, Resolution) by referring the below data sheet.
MT9M114 - 1/6‐inch 720p High‐Definition (HD) System‐On‐a‐Chip (SOC) Digital Image Sensor.
At now i configured sensor with below settings,
Pixel format as "RGB565" and Resolution as " 320*240 "
And initialized DCMI and DMA and UART configurations like below,
DCMI_HandleTypeDef hdcmi;
DMA_HandleTypeDef hdma_dcmi;
I2C_HandleTypeDef hi2c1;
UART_HandleTypeDef huart3;
DMA_HandleTypeDef hdma_usart3_tx;
static void MX_DCMI_Init(void)
{
/* USER CODE BEGIN DCMI_Init 0 */
/* USER CODE END DCMI_Init 0 */
/* USER CODE BEGIN DCMI_Init 1 */
/* USER CODE END DCMI_Init 1 */
hdcmi.Instance = DCMI;
hdcmi.Init.SynchroMode = DCMI_SYNCHRO_HARDWARE;
hdcmi.Init.PCKPolarity = DCMI_PCKPOLARITY_FALLING;
hdcmi.Init.VSPolarity = DCMI_VSPOLARITY_LOW;
hdcmi.Init.HSPolarity = DCMI_HSPOLARITY_LOW;
hdcmi.Init.CaptureRate = DCMI_CR_ALL_FRAME;
hdcmi.Init.ExtendedDataMode = DCMI_EXTEND_DATA_8B;
hdcmi.Init.JPEGMode = DCMI_JPEG_DISABLE;
hdcmi.Init.ByteSelectMode = DCMI_BSM_ALL;
hdcmi.Init.ByteSelectStart = DCMI_OEBS_ODD;
hdcmi.Init.LineSelectMode = DCMI_LSM_ALL;
hdcmi.Init.LineSelectStart = DCMI_OELS_ODD;
if (HAL_DCMI_Init(&hdcmi) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN DCMI_Init 2 */
/* USER CODE END DCMI_Init 2 */
}
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA2_CLK_ENABLE();
__HAL_RCC_DMA1_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Stream1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Stream1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Stream1_IRQn);
/* DMA2_Stream1_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Stream1_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream1_IRQn);
}
static void MX_USART3_UART_Init(void)
{
/* USER CODE BEGIN USART3_Init 0 */
/* USER CODE END USART3_Init 0 */
/* USER CODE BEGIN USART3_Init 1 */
/* USER CODE END USART3_Init 1 */
huart3.Instance = USART3;
huart3.Init.BaudRate = 115200;
huart3.Init.WordLength = UART_WORDLENGTH_8B;
huart3.Init.StopBits = UART_STOPBITS_1;
huart3.Init.Parity = UART_PARITY_NONE;
huart3.Init.Mode = UART_MODE_TX_RX;
huart3.Init.HwFlowCtl = UART_HWCONTROL_NONE;
huart3.Init.OverSampling = UART_OVERSAMPLING_16;
huart3.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
huart3.Init.ClockPrescaler = UART_PRESCALER_DIV1;
huart3.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
if (HAL_UART_Init(&huart3) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetTxFifoThreshold(&huart3, UART_TXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_SetRxFifoThreshold(&huart3, UART_RXFIFO_THRESHOLD_1_8) != HAL_OK)
{
Error_Handler();
}
if (HAL_UARTEx_DisableFifoMode(&huart3) != HAL_OK)
{
Error_Handler();
}
/* USER CODE BEGIN USART3_Init 2 */
/* USER CODE END USART3_Init 2 */
}
Now i am trying to print some patterns which are sensor supported like below image.
I configured FLAT field pattern(register values) through I2C in specific register. And reading again through I2C from pattern register, got same value which i configured. So which means pattern is configured properly.
Taking DCMI data like below and passing through UART,
#define IMAGE_BUFFER_SIZE (320*240)
uint8_t frame_buffer[IMAGE_BUFFER_SIZE] = "";
HAL_StatusTypeDef mt9m114_stopCap(){
HAL_DCMI_Stop(&hdcmi);
return HAL_OK;
}
HAL_StatusTypeDef mt9m114_startCap()
{
mt9m114_stopCap();
HAL_DCMI_Start_DMA(&hdcmi, DCMI_MODE_CONTINUOUS, (uint32_t)frame_buffer, 320*240);
HAL_UART_Transmit_DMA(&huart3, frame_buffer, sizeof(frame_buffer));
memset(frame_buffer,sizeof(frame_buffer),0);
return HAL_OK;
}
At present i'm getting DCMI Data like below image. This below image is screen shot of DCMI data in putty terminal.
By using this RGB to Image converter "" https://codestation.ch/ "" result as like below. I'm unable to get Exact pattern which i expected.
Can anyone help on this issue , if i made anything wrong on DCMI part.
Thanks in advance.