/* * Copyright (c) 2006-2022, RT-Thread Development Team * * SPDX-License-Identifier: Apache-2.0 * * Change Logs: * Date Author Notes * 2020-07-27 thread-liu the first version */ #include "board.h" #if defined(BSP_USING_DCMI) #include "drv_dcmi.h" #define DRV_DEBUG #define LOG_TAG "drv.dcmi" #include struct stm32_dcmi { struct rt_device dev; }; static struct stm32_dcmi rt_dcmi = {0}; DCMI_HandleTypeDef dcmi = {0}; DMA_HandleTypeDef hdma_dcmi = {0}; extern void jpeg_data_process(void); static void rt_hw_dmci_dma_init(void) { __HAL_RCC_DMAMUX_CLK_ENABLE(); __HAL_RCC_DMA1_CLK_ENABLE(); hdma_dcmi.Instance = DMA1_Stream3; hdma_dcmi.Init.Request = DMA_REQUEST_DCMI; hdma_dcmi.Init.Direction = DMA_PERIPH_TO_MEMORY; hdma_dcmi.Init.PeriphInc = DMA_PINC_DISABLE; hdma_dcmi.Init.MemInc = DMA_MINC_ENABLE; hdma_dcmi.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD; hdma_dcmi.Init.MemDataAlignment = DMA_MDATAALIGN_WORD; hdma_dcmi.Init.Mode = DMA_CIRCULAR; hdma_dcmi.Init.Priority = DMA_PRIORITY_HIGH; hdma_dcmi.Init.FIFOMode = DMA_FIFOMODE_ENABLE; hdma_dcmi.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL; hdma_dcmi.Init.MemBurst = DMA_MBURST_SINGLE; hdma_dcmi.Init.PeriphBurst = DMA_PBURST_SINGLE; HAL_DMA_Init(&hdma_dcmi); __HAL_LINKDMA(&dcmi, DMA_Handle, hdma_dcmi); HAL_NVIC_SetPriority(DMA1_Stream3_IRQn, 0x02, 0); HAL_NVIC_EnableIRQ(DMA1_Stream3_IRQn); } void rt_hw_dcmi_dma_config(rt_uint32_t dst_addr1, rt_uint32_t dst_addr2, rt_uint16_t len) { HAL_DMAEx_MultiBufferStart(&hdma_dcmi, (rt_uint32_t)&DCMI->DR, dst_addr1, dst_addr2, len); __HAL_DMA_ENABLE_IT(&hdma_dcmi, DMA_IT_TC); } static rt_err_t rt_hw_dcmi_init(DCMI_HandleTypeDef *device) { RT_ASSERT(device != RT_NULL); device->Instance = DCMI; device->Init.SynchroMode = DCMI_SYNCHRO_HARDWARE; device->Init.PCKPolarity = DCMI_PCKPOLARITY_RISING; device->Init.VSPolarity = DCMI_VSPOLARITY_LOW; device->Init.HSPolarity = DCMI_HSPOLARITY_LOW; device->Init.CaptureRate = DCMI_CR_ALL_FRAME; device->Init.ExtendedDataMode = DCMI_EXTEND_DATA_8B; device->Init.JPEGMode = DCMI_JPEG_DISABLE; device->Init.ByteSelectMode = DCMI_BSM_ALL; device->Init.ByteSelectStart = DCMI_OEBS_ODD; device->Init.LineSelectMode = DCMI_LSM_ALL; device->Init.LineSelectStart = DCMI_OELS_ODD; if (HAL_DCMI_Init(device) != HAL_OK) { LOG_E("dcmi init error!"); return RT_ERROR; } DCMI->IER = 0x0; __HAL_DCMI_ENABLE_IT(device, DCMI_IT_FRAME); __HAL_DCMI_ENABLE(device); rt_hw_dmci_dma_init(); return RT_EOK; } void DCMI_IRQHandler(void) { /* enter interrupt */ rt_interrupt_enter(); HAL_DCMI_IRQHandler(&dcmi); /* leave interrupt */ rt_interrupt_leave(); } /* Capture a frame of the image */ void HAL_DCMI_FrameEventCallback(DCMI_HandleTypeDef *hdcmi) { /* enter interrupt */ rt_interrupt_enter(); jpeg_data_process(); __HAL_DCMI_ENABLE_IT(&dcmi,DCMI_IT_FRAME); /* leave interrupt */ rt_interrupt_leave(); } void DMA1_Stream3_IRQHandler(void) { extern void rt_hw_camera_rx_callback(void); /* enter interrupt */ rt_interrupt_enter(); if(__HAL_DMA_GET_FLAG(&hdma_dcmi, DMA_FLAG_TCIF3_7)!=RESET) { __HAL_DMA_CLEAR_FLAG(&hdma_dcmi, DMA_FLAG_TCIF3_7); rt_hw_camera_rx_callback(); } /* leave interrupt */ rt_interrupt_leave(); } static rt_err_t rt_dcmi_init(rt_device_t dev) { RT_ASSERT(dev != RT_NULL); rt_err_t result = RT_EOK; result = rt_hw_dcmi_init(&dcmi); if (result != RT_EOK) { return result; } return result; } static rt_err_t rt_dcmi_open(rt_device_t dev, rt_uint16_t oflag) { RT_ASSERT(dev != RT_NULL); return RT_EOK; } static rt_err_t rt_dcmi_close(rt_device_t dev) { RT_ASSERT(dev != RT_NULL); return RT_EOK; } static rt_err_t rt_dcmi_control(rt_device_t dev, int cmd, void *args) { RT_ASSERT(dev != RT_NULL); return RT_EOK; } static rt_size_t rt_dcmi_read(rt_device_t dev, rt_off_t pos, void *buffer, rt_size_t size) { RT_ASSERT(dev != RT_NULL); return RT_EOK; } static rt_size_t rt_dcmi_write(rt_device_t dev, rt_off_t pos, const void *buffer, rt_size_t size) { RT_ASSERT(dev != RT_NULL); return RT_EOK; } int dcmi_init(void) { rt_dcmi.dev.type = RT_Device_Class_Miscellaneous; rt_dcmi.dev.init = rt_dcmi_init; rt_dcmi.dev.open = rt_dcmi_open; rt_dcmi.dev.close = rt_dcmi_close; rt_dcmi.dev.read = rt_dcmi_read; rt_dcmi.dev.write = rt_dcmi_write; rt_dcmi.dev.control = rt_dcmi_control; rt_dcmi.dev.user_data = RT_NULL; rt_device_register(&rt_dcmi.dev, "dcmi", RT_DEVICE_FLAG_RDWR | RT_DEVICE_FLAG_REMOVABLE | RT_DEVICE_FLAG_STANDALONE); LOG_I("dcmi init success!"); return RT_EOK; } INIT_BOARD_EXPORT(dcmi_init); #endif