WhyCan Forum(哇酷开发者社区)

void InitSPI1(){
	GPIOA->CFG[0]&=0xffff0000;
	GPIOA->CFG[0]|=0x00001661;
	
	SETBIT(CCU->BUS_SOFT_RST0,1<<CCU_BUS_CLK_GATING_SPI1_GATING);
	ENABLE_BUSCLK(CCU_BUS_CLK_GATING_SPI1_GATING);
	SPI1->CCR=0x00001000+2;
	SPI1->GCR=SPI_GCR_SRST|SPI_GCR_MODE|SPI_GCR_TP_EN|SPI_GCR_EN;
	while(SPI1->GCR&SPI_GCR_SRST);
	SETBIT(SPI1->TCR,SPI_TCR_CPOL|SPI_TCR_CPHA|SPI_TCR_SS_OWNER);//SPI_TCR_CPOL|SPI_TCR_CPHA|
	SETBIT(SPI1->FCR,SPI_FCR_RF_RST|SPI_FCR_TX_FIFO_RST|SPI_FCR_TF_DRQ_EN);
}

void InitDMA(){
	ENABLE_BUSCLK(CCU_BUS_CLK_GATING_DMA_GATING);
	SETBIT(CCU->BUS_SOFT_RST0,1<<CCU_BUS_CLK_GATING_DMA_GATING);
	DMA->NDMA[0].CFG=NDMA_CFG_DESTINATION_DRQ_TYPE_CONFIDENTIAL_SET(NDMA_CFG_DRQ_SPI1_TX)|NDMA_CFG_SOURCE_DRQ_TYPE_SET(NDMA_CFG_DRQ_SDRAM_MEMORY)|NDMA_CFG_SOURCE_ADDRESS_TYPE_SET(NDMA_CFG_ADDRESS_LINEAR_MODE)|NDMA_CFG_DESTINATION_ADDRESS_TYPE_SET(NDMA_CFG_ADDRESS_IO_MODE)|NDMA_CFG_REMAIN_BYTE_COUNTER_READ_ENABLE|NDMA_CFG_WAIT_STATE_SET(NDMA_CFG_WAIT_STATE2);
	DMA->NDMA[0].SRC_ADR=(u32)&lcdbuff;
	DMA->NDMA[0].DES_ADR=(u32)&SPI1->TXD;
}

void flushDMA(){
	SPI1->MBC=SPI1->MTC=SPI1->BCC=DMA->NDMA[0].BYTE_CNT=240*320*2;
	SETBIT(DMA->NDMA[0].CFG,NDMA_CFG_LOADING);
	SETBIT(SPI1->TCR,SPI_TCR_XCH);
	while(DMA->NDMA[0].CFG&NDMA_CFG_BUSY_STATUS)SPI1->RXD;
	SETBIT(SPI1->ISR,SPI_ISR_TC);
	while(!(SPI1->ISR&SPI_ISR_TC))SPI1->RXD;
}
u8 lcdbuff[240*320*2] __attribute__((at(0x80000000)));
for(cnt=0;cnt<240*320;cnt++)lcdbuff[cnt]=0xff;
for(cnt=0;cnt<240*320;cnt++)lcdbuff[cnt+240*320]=0x0;
InitDMA();
ST7789_CS_CLR();
flushDMA();
ST7789_CS_SET();