WU-YANG Technology Co., Ltd. SIOC 6DMA / MIAT 2 DMAVCP DMA Polling Interrupt SIOC DMA DMA(Direct Memory Access)CPU DMACPU DMADMA17 DMA 3 WU-YANG Technology Co., Ltd. DMA Registers DMA Channel Mapping 5 DMA Request Mapping 6 DMA Interrupt Status Register 7 DMA Interrupt Status Register Cont., 8 DMA Interrupt Flag Clear Register 9 DMA Channel x Configuration Register 10 DMA Channel x Configuration Register Cont., 11 DMA Channel x Configuration Register Cont., 12 DMA Channel x Number of Data Register 13 DMA Channel x Peripheral Address Register 14 DMA Channel x Memory Address Register 15 DMA Register Mapping 16 DMA Register Mapping Cont., 17 DMA Register Mapping Cont., 18 DMA Register Mapping Cont., 19 WU-YANG Technology Co., Ltd. DMA Standard Driver Library DMA Standard Driver Library List 21 DMA DeInit Function 22 DMA Init Function 23 DMA Init Function Cont., 24 DMA Init Function Cont., 25 DMA Init Function Cont., 26 DMA Init Function Cont., 27 DMA Init Function Cont., 28 DMA Init Function Cont., 29 DMA Command Function 30 DMA Interrupt Function 31 DMA Interrupt Function Cont., 32 DMA Get CurrDataCounter Function 33 DMA Get Flag Status Function 34 DMA Get Flag Status Function Cont., 35 DMA Get Flag Status Function Cont., 36 DMA Get Flag Status Function Cont., 37 DMA Get Flag Status Function Cont., 38 DMA Clear Flag Function 39 DMA Get Interrupt Status Function 40 DMA Get Interrupt Status Function Cont., 41 DMA Get Interrupt Status Function Cont., 42 DMA Get Interrupt Status Function Cont., 43 DMA Clear Interrupt Pending Bit Function 44 1 Polling DMA Goal Use DMA to copy data from memory to memory Principle Check the DMA flag 45 Development Flow 46 Embedded So ftware Side Download Program to the Flash of the STM32 RCC Configure 47 /* RCC Configure */ /* DMA1 clock enable */ RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE); Turn On DMA1 Clock DMA Configure 48 /* DMA Configure */ void DMA_Configuration(void) { DMA_InitTypeDef DMA_InitStructure; /* DMA1 channel6 configuration */ DMA_DeInit(DMA1_Channel6); DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SRC_Const_Buffer; DMA_InitStructure.DMA_MemoryBaseAddr = (uint32_t)DST_Buffer; DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC; DMA_InitStructure.DMA_BufferSize = BufferSize; DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable; DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable; DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word; DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word; DMA_InitStructure.DMA_Mode = DMA_Mode_Normal; DMA_InitStructure.DMA_Priority = DMA_Priority_High; DMA_InitStructure.DMA_M2M = DMA_M2M_Enable; DMA_Init(DMA1_Channel6, &DMA_InitStructure); } User Program 49 /* User Program */ while (DMA_GetFlagStatus(DMA1_FLAG_TC5) == RESET); DMA_ClearFlag(DMA1_FLAG_TC5); DMA_Configuration(); //DMA_Cmd(DMA1_Channel5, ENABLE); 2 Interrupt DMA Goal Use DMA to copy data from memory to memory Principle Use the DMA Interrupt 50 Development Flow 51 Download Program to the Flash of the STM32F103C8 Q & A