STM32F429+OV2640+USART JPEG实验，输出的数据毫无规律。

xiaoloveyao

黄色：pclk（周期约28ns）     蓝色：hs    红色：href

部分程式：

主函数：

[mw_shl_code=c,true]int main(void) { HAL_Init(); /* Configure the system clock to 168 Mhz */ SystemClock_Config(); UartHandle.Instance = USARTx; UartHandle.Init.BaudRate = 115200; UartHandle.Init.WordLength = UART_WORDLENGTH_8B; UartHandle.Init.StopBits = UART_STOPBITS_1; UartHandle.Init.Parity = UART_PARITY_NONE; UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE; UartHandle.Init.Mode = UART_MODE_TX_RX; if(HAL_UART_Init(&UartHandle) != HAL_OK) { /* Initialization Error */ Error_Handler(); } /* Enable the GPIO_LED clock */ __GPIOD_CLK_ENABLE(); __GPIOG_CLK_ENABLE(); /* Configure the Reset pin */ GPIO_InitStruct.Pin = GPIO_PIN_3; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FAST; HAL_GPIO_Init(GPIOD, &GPIO_InitStruct); /* Configure the PWDN pin */ GPIO_InitStruct.Pin = GPIO_PIN_9; GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP; GPIO_InitStruct.Pull = GPIO_PULLUP; GPIO_InitStruct.Speed = GPIO_SPEED_FAST; HAL_GPIO_Init(GPIOG, &GPIO_InitStruct); HAL_GPIO_WritePin(GPIOG, GPIO_PIN_9, GPIO_PIN_RESET); //PWDN ON HAL_Delay(10);//10ms HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_RESET); //Reset active HAL_Delay(10);//10ms HAL_GPIO_WritePin(GPIOD, GPIO_PIN_3, GPIO_PIN_SET); //Reset off /* Initialize the Camera */ BSP_CAMERA_Init(RESOLUTION_R1600x1200); OV2640_JPEG_Mode(CAMERA_I2C_ADDRESS); OV2640_OutSize_Set(CAMERA_I2C_ADDRESS,jpeg_img_size_tbl[size][0],jpeg_img_size_tbl[size][1]);//set output size // *jpeg_buf = BSP_CAMERA_Receive(); /* Start the Camera Capture */ BSP_CAMERA_ContinuousStart((uint8_t *)&jpeg_buf,jpeg_buf_size); while (1) { if(jpeg_data_ok == 1) { p = (uint8_t *)jpeg_buf; if(HAL_UART_Transmit(&UartHandle, p, jpeg_data_len*4, 5000)!= HAL_OK) { Error_Handler(); } jpeg_data_ok = 2; } } }[/mw_shl_code]

DMA FRAME中断函数：

[mw_shl_code=c,true]void BSP_CAMERA_FrameEventCallback(void) { jpeg_data_process(); } void jpeg_data_process(void) { if(jpeg_data_ok == 0) { //get data BSP_CAMERA_Suspend(); jpeg_data_len = jpeg_buf_size - BSP_CAMERA_RemainData(); jpeg_data_ok=1; } if(jpeg_data_ok == 2) { BSP_CAMERA_Resume(); jpeg_data_ok=0; } }[/mw_shl_code]

不知道从何下手找问题，有经验的朋友指导一下我，谢谢。

正点原子

帮顶。。。。。