[mw_shl_code=c,true]void camera_data_crop(uint16_t x0, uint16_t y0, uint16_t width, uint16_t height) { DCMI_CROPInitTypeDef DCMI_CROPInitStruct; DCMI_CROPInitStruct.DCMI_HorizontalOffsetCount = x0 * 2; DCMI_CROPInitStruct.DCMI_CaptureCount = width * 2 - 1; DCMI_CROPInitStruct.DCMI_VerticalStartLine = y0; DCMI_CROPInitStruct.DCMI_VerticalLineCount = height - 1; DCMI_CROPConfig(&DCMI_CROPInitStruct); DCMI_CROPCmd(ENABLE); } void camera_data_show(void) { DCMI_Stop(); OV2640_RGB565Mode(); //摄像头输出必须为非JPEG格式数据 OV2640_OutSizeSet(320, 240); DCMI->CR &= ~DCMI_CR_JPEG; //未压缩的视频格式 DCMI->CR &= ~DCMI_CaptureMode_SnapShot; //连续模式 DMA2_Stream1->M0AR = (uint32_t)&LCD_RAM; DMA2_Stream1->NDTR = 1; DMA2_Stream1->CR = (DMA2_Stream1->CR & 0xFFFF9FFF) | DMA_MemoryDataSize_HalfWord; DMA2_Stream1->CR &= ~DMA_MemoryInc_Enable; camera_data_crop(80, 60, 160, 120); LCD_SetWindow(80, 60, 160, 120); LCD_WR_PRE(); DCMI_Start(); }[/mw_shl_code] 以上程序在320x240的LCD中心显示160x120大小的经裁剪的图像。[/mw_shl_code]