I have tried to set the buffer for receiving data a location where DMA can reach(uint32_t dcmi_data_buff[2560] __attribute__((section(".ARM.__at_0x24040000")));).
But every time I start DMA I got the same data and once I changed the location for buffer the data changed too. I also found it is the same as it was before DMA start.This seems HAL_DCMI_Start_DMA didn't work to get the data from DCMI.The data does not contain "FF D9" or "FF D8" in data so the data doesn't seem to be a jpeg photo. I wonder how to get a photo correctly.
main.c :
/* USER CODE BEGIN Header */
/**
******************************************************************************
* @file : main.c
* @brief : Main program body
******************************************************************************
* @attention
*
* Copyright (c) 2024 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
*/
/* USER CODE END Header */
/* Includes ------------------------------------------------------------------*/
#include "main.h"
#include "string.h"
#include <stdio.h>
/* Private includes ----------------------------------------------------------*/
/* USER CODE BEGIN Includes */
#include "ov2640.h"
/* USER CODE END Includes */
/* Private typedef -----------------------------------------------------------*/
/* USER CODE BEGIN PTD */
#define JPEG_BUFFER_LENGTH 10*1024/4
#define USART_BUFFER_LENGTH JPEG_BUFFER_LENGTH*4
#define JPEG_BUFFER_NUM 2
#define JPEG_WIDTH 1600
#define JPEG_HEIGHT 1200
/* USER CODE END PTD */
/* Private define ------------------------------------------------------------*/
/* USER CODE BEGIN PD */
#ifndef HSEM_ID_0
#define HSEM_ID_0 (0U) /* HW semaphore 0*/
#endif
/* USER CODE END PD */
/* Private macro -------------------------------------------------------------*/
/* USER CODE BEGIN PM */
/* USER CODE END PM */
/* Private variables ---------------------------------------------------------*/
#if defined ( __ICCARM__ ) /*!< IAR Compiler */
#pragma location=0x30000000
ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
#pragma location=0x30000080
ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
#elif defined ( __CC_ARM ) /* MDK ARM Compiler */
__attribute__((at(0x30000000))) ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT]; /* Ethernet Rx DMA Descriptors */
__attribute__((at(0x30000080))) ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT]; /* Ethernet Tx DMA Descriptors */
#elif defined ( __GNUC__ ) /* GNU Compiler */
ETH_DMADescTypeDef DMARxDscrTab[ETH_RX_DESC_CNT] __attribute__((section(".RxDecripSection"))); /* Ethernet Rx DMA Descriptors */
ETH_DMADescTypeDef DMATxDscrTab[ETH_TX_DESC_CNT] __attribute__((section(".TxDecripSection"))); /* Ethernet Tx DMA Descriptors */
#endif
ETH_TxPacketConfig TxConfig;
DCMI_HandleTypeDef hdcmi;
DMA_HandleTypeDef hdma_dcmi;
ETH_HandleTypeDef heth;
UART_HandleTypeDef huart3;
/* USER CODE BEGIN PV */
HAL_StatusTypeDef dcmi_dma_status = HAL_OK;
uint8_t ov2640_verh = 0xff, ov2640_verl=0xff;
uint32_t dcmi_data_buff[2560] __attribute__((section(".ARM.__at_0x24040000")));
uint32_t DCMI_RN = 0; //row number
uint32_t DCMI_CN = 0; //column number
uint32_t DCMI_RS = 0; //row start
uint32_t DCMI_CS = 0; //column start
uint8_t tx_busy = 0;
/* USER CODE END PV */
/* Private function prototypes -----------------------------------------------*/
void SystemClock_Config(void);
static void MX_GPIO_Init(void);
static void MX_DMA_Init(void);
static void MX_DCMI_Init(void);
static void MX_ETH_Init(void);
static void MX_USART3_UART_Init(void);
/* USER CODE BEGIN PFP */
/* USER CODE END PFP */
/* Private user code ---------------------------------------------------------*/
/* USER CODE BEGIN 0 */
#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
PUTCHAR_PROTOTYPE
{
USART3->TDR = ch;
while(!(USART3->ISR& USART_ISR_TXE_TXFNF_Msk))
{;}
return ch;
}
void Send(uint8_t *pData,int jpglen)
{
uint32_t i = 0;
//printf("jpeg data size:%d\r\n",JPEG_BUFFER_LENGTH);
HAL_Delay(1000);
for(i = 0;i < jpglen;i++)
{
//printf("%02x\t",pData[i]);
printf("%c",pData[i]);
}
HAL_Delay(1000);
printf("\r\n");
}
void PY_OV2640_RGB565_CONFIG(void)
{
/*Camera Interface*/
SCCB_Rst(); //hard reset
HAL_Delay(100);
SCCB_WR_Reg(0xff, 0x01); //soft reset
SCCB_WR_Reg(0x12, 0x80);
HAL_Delay(100);
ov2640_verh = SCCB_RD_Reg(0x1c);
HAL_Delay(50);
ov2640_verl = SCCB_RD_Reg(0x1d);
HAL_Delay(50);
while ((ov2640_verh==0xff)||(ov2640_verl==0xff))
{
HAL_UART_Transmit(&huart3, &ov2640_verh, 1, 0xFFFFFF);
HAL_Delay(500);
HAL_UART_Transmit(&huart3, &ov2640_verl, 1, 0xFFFFFF);
HAL_Delay(500);
}
OV2640_UXGA_Init();
//pix speed adjustment
SCCB_WR_Reg(0xff, 0x00);
SCCB_WR_Reg(0xd3, 0x00);
SCCB_WR_Reg(0XFF, 0X01);
SCCB_WR_Reg(0X11, 0x01);
//OV2640_RGB565_Mode();
OV2640_JPEG_Mode();
OV2640_OutSize_Set(640, 480);
HAL_Delay(200);
}
/* USER CODE END 0 */
/**
* @brief The application entry point.
* @retval int
*/
int main(void)
{
/* USER CODE BEGIN 1 */
/* USER CODE END 1 */
/* USER CODE BEGIN Boot_Mode_Sequence_0 */
int32_t timeout;
/* USER CODE END Boot_Mode_Sequence_0 */
/* USER CODE BEGIN Boot_Mode_Sequence_1 */
/* Wait until CPU2 boots and enters in stop mode or timeout*/
timeout = 0xFFFF;
while((__HAL_RCC_GET_FLAG(RCC_FLAG_D2CKRDY) != RESET) && (timeout-- > 0));
if ( timeout < 0 )
{
Error_Handler();
}
/* USER CODE END Boot_Mode_Sequence_1 */
/* MCU Configuration--------------------------------------------------------*/
/* Reset of all peripherals, Initializes the Flash interface and the Systick. */
HAL_Init();
/* USER CODE BEGIN Init */
/* USER CODE END Init */
/* Configure the system clock */
SystemClock_Config();
/* USER CODE BEGIN Boot_Mode_Sequence_2 */
/* When system initialization is finished, Cortex-M7 will release Cortex-M4 by means of
HSEM notification */
/*HW semaphore Clock enable*/
__HAL_RCC_HSEM_CLK_ENABLE();
/*Take HSEM */
HAL_HSEM_FastTake(HSEM_ID_0);
/*Release HSEM in order to notify the CPU2(CM4)*/
HAL_HSEM_Release(HSEM_ID_0,0);
/* wait until CPU2 wakes up from stop mode */
timeout = 0xFFFF;
while((__HAL_RCC_GET_FLAG(RCC_FLAG_D2CKRDY) == RESET) && (timeout-- > 0));
if ( timeout < 0 )
{
Error_Handler();
}
/* USER CODE END Boot_Mode_Sequence_2 */
/* USER CODE BEGIN SysInit */
/* USER CODE END SysInit */
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_DMA_Init();
MX_DCMI_Init();
MX_ETH_Init();
MX_USART3_UART_Init();
/* USER CODE BEGIN 2 */
//PY_OV2640_RGB565_CONFIG();
/* USER CODE END 2 */
OV2640_Init();
OV2640_RGB565_Mode();
OV2640_JPEG_Mode();
OV2640_Light_Mode(0);
OV2640_OutSize_Set(JPEG_WIDTH,JPEG_HEIGHT);
HAL_Delay(10);
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
/* USER CODE END WHILE */
dcmi_dma_status = HAL_DCMI_Init(&hdcmi);
// ??DCMI??
HAL_DCMI_StateTypeDef State = HAL_DCMI_GetState(&hdcmi);
uint32_t Error = HAL_DCMI_GetError(&hdcmi);
// ??DCMI???????
printf("DCMI State: %ld, Error: %ld\r\n", (long)State, (long)Error);
// ??DMA??
HAL_DMA_StateTypeDef DMA_State = HAL_DMA_GetState(&hdma_dcmi);
uint32_t DMA_Error = HAL_DMA_GetError(&hdma_dcmi);
// ??DMA???????
printf("DMA State: %d, Error: %ld\r\n", DMA_State, (long)DMA_Error);
HAL_Delay(1000);
for (uint8_t i=0; i<10;i++)
{
// HAL_DCMI_DisableCrop (&hdcmi);
// DCMI_RN = 48;
// DCMI_CN = 1280;
// DCMI_RS = 48*i;
// DCMI_CS = 0;
// HAL_DCMI_ConfigCrop (&hdcmi, DCMI_CS, DCMI_RS, DCMI_CN, DCMI_RN);
// HAL_Delay(1);
// HAL_DCMI_EnableCrop (&hdcmi);
// HAL_Delay(1);
HAL_DCMI_Stop(&hdcmi);
MX_DCMI_Init();
__HAL_DCMI_ENABLE_IT(&hdcmi, DCMI_IT_FRAME);
dcmi_dma_status = HAL_DCMI_Start_DMA(&hdcmi, DCMI_MODE_SNAPSHOT, (uint32_t)&dcmi_data_buff, DCMI_CN*DCMI_RN/4);
while(HAL_DMA_GetState(&hdma_dcmi)==HAL_DMA_STATE_BUSY) ;
//HAL_DCMI_Resume(&hdcmi);
HAL_DCMI_Stop(&hdcmi);
tx_busy = 1;
Send((uint8_t *)dcmi_data_buff, sizeof(dcmi_data_buff));
HAL_Delay(1000000);
while(tx_busy!=0) ;
}
}
/* USER CODE BEGIN 3 */
}
/* USER CODE END 3 */
/**
* @brief System Clock Configuration
* @retval None
*/
void SystemClock_Config(void)
{
RCC_OscInitTypeDef RCC_OscInitStruct = {0};
RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
/** Configure the main internal regulator output voltage
*/
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE3);
// ????????????
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_HSI;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
Error_Handler();
}
// ??????
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
RCC_OscInitStruct.PLL.PLLM = 8;
RCC_OscInitStruct.PLL.PLLN = 336;
RCC_OscInitStruct.PLL.PLLP = 2;
RCC_OscInitStruct.PLL.PLLQ = 7;
RCC_OscInitStruct.PLL.PLLR = 2;
RCC_OscInitStruct.PLL.PLLRGE = RCC_PLL1VCIRANGE_1;
RCC_OscInitStruct.PLL.PLLVCOSEL = RCC_PLL1VCOWIDE;
RCC_OscInitStruct.PLL.PLLFRACN = 0;
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
// ???????????,?????????????
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2
|RCC_CLOCKTYPE_D3PCLK1|RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
Error_Handler();
}
HAL_RCC_MCOConfig(RCC_MCO1, RCC_MCO1SOURCE_HSI, RCC_MCODIV_8);
// ????????
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
Error_Handler();
}
}
/**
* @brief DCMI Initialization Function
* @PAram None
* @retval None
*/
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_RISING;
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_ENABLE;
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 */
}
/**
* @brief ETH Initialization Function
* @PAram None
* @retval None
*/
static void MX_ETH_Init(void)
{
/* USER CODE BEGIN ETH_Init 0 */
/* USER CODE END ETH_Init 0 */
static uint8_t MACAddr[6];
/* USER CODE BEGIN ETH_Init 1 */
/* USER CODE END ETH_Init 1 */
heth.Instance = ETH;
MACAddr[0] = 0x00;
MACAddr[1] = 0x80;
MACAddr[2] = 0xE1;
MACAddr[3] = 0x00;
MACAddr[4] = 0x00;
MACAddr[5] = 0x00;
heth.Init.MACAddr = &MACAddr[0];
heth.Init.MediaInterface = HAL_ETH_RMII_MODE;
heth.Init.TxDesc = DMATxDscrTab;
heth.Init.RxDesc = DMARxDscrTab;
heth.Init.RxBuffLen = 1524;
/* USER CODE BEGIN MACADDRESS */
/* USER CODE END MACADDRESS */
if (HAL_ETH_Init(&heth) != HAL_OK)
{
Error_Handler();
}
memset(&TxConfig, 0 , sizeof(ETH_TxPacketConfig));
TxConfig.Attributes = ETH_TX_PACKETS_FEATURES_CSUM | ETH_TX_PACKETS_FEATURES_CRCPAD;
TxConfig.ChecksumCtrl = ETH_CHECKSUM_IPHDR_PAYLOAD_INSERT_PHDR_CALC;
TxConfig.CRCPadCtrl = ETH_CRC_PAD_INSERT;
/* USER CODE BEGIN ETH_Init 2 */
/* USER CODE END ETH_Init 2 */
}
/**
* @brief USART3 Initialization Function
* @PAram None
* @retval None
*/
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 */
}
/**
* Enable DMA controller clock
*/
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
HAL_DMA_Init(&hdma_dcmi) ;
/* DMA interrupt init */
/* DMA1_Stream0_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Stream0_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(DMA1_Stream0_IRQn);
}
/**
* @brief GPIO Initialization Function
* @PAram None
* @retval None
*/
static void MX_GPIO_Init(void)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
/* USER CODE BEGIN MX_GPIO_Init_1 */
/* USER CODE END MX_GPIO_Init_1 */
/* GPIO Ports Clock Enable */
__HAL_RCC_GPIOE_CLK_ENABLE();
__HAL_RCC_GPIOC_CLK_ENABLE();
__HAL_RCC_GPIOH_CLK_ENABLE();
__HAL_RCC_GPIOA_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
__HAL_RCC_GPIOD_CLK_ENABLE();
__HAL_RCC_GPIOG_CLK_ENABLE();
/*Configure GPIO pins : PA11 PA12 */
GPIO_InitStruct.Pin = GPIO_PIN_11|GPIO_PIN_12;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF10_OTG1_FS;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE BEGIN MX_GPIO_Init_2 */
/*Configure GPIO pins : PB6 PB7 */
GPIO_InitStruct.Pin = GPIO_PIN_6|GPIO_PIN_7;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_PULLUP;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/*Configure GPIO pins : PD12 PD13 */
GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);
OV2640_PWUP;
OV2640_RUN;
/*Configure GPIO pin : PA8 */
GPIO_InitStruct.Pin = GPIO_PIN_8;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
GPIO_InitStruct.Alternate = GPIO_AF0_MCO;
HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
/* USER CODE END MX_GPIO_Init_2 */
}
/* USER CODE BEGIN 4 */
/* USER CODE END 4 */
/**
* @brief This function is executed in case of error occurrence.
* @retval None
*/
void Error_Handler(void)
{
/* USER CODE BEGIN Error_Handler_Debug */
/* User can add his own implementation to report the HAL error return state */
__disable_irq();
while (1)
{
}
/* USER CODE END Error_Handler_Debug */
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @PAram file: pointer to the source file name
* @PAram line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t *file, uint32_t line)
{
/* USER CODE BEGIN 6 */
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* USER CODE END 6 */
}
#endif /* USE_FULL_ASSERT */
