想看SPI和漢字以及圖片的去 我的B站，UID:626862190 看這期視頻【SPI 0.96oled+字庫(kù)圖庫(kù)制作】

DMA這里

/**先配置通道，傳送時(shí)再寫源地址、目的地址、傳送大小,這樣地址更靈活**/

void MyDMA_Init(void)

{

??RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);

??DMA_InitTypeDef?DMA_InitStructure;

??DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

??DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Enable;

??DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;

??DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

??DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;

??DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

DMA_InitStructure.DMA_M2M = DMA_M2M_Enable;

??DMA_InitStructure.DMA_Priority = DMA_Priority_Low;

??DMA_Init(DMA1_Channel7,&DMA_InitStructure);

DMA_Cmd(DMA1_Channel7,DISABLE);

}

void MyDMA_StartTransfer(uint32_t AddrA,uint32_t AddrB,uint16_t Size)

{

DMA_Cmd(DMA1_Channel7,DISABLE);

??DMA1_Channel7->CPAR = AddrA;

DMA1_Channel7->CMAR = AddrB;

DMA_SetCurrDataCounter(DMA1_Channel7,Size);// 等同于DMA1_Channel7->CNDTR = Size;??

DMA_Cmd(DMA1_Channel7,ENABLE);

while(DMA_GetFlagStatus(DMA1_FLAG_TC7) == RESET);

DMA_ClearFlag(DMA1_FLAG_TC7);

}