SWM32系列教程10--SDRAM和LCD

SWM32S单片机内部集成了8MB的SDRAM以及LCD控制器，非常适合用于屏幕驱动。其中LCD控制器支持RGB565格式的接口，最大支持1024*768分辨率。今天来介绍一下这两个外设的用法。

SDRAM_InitStructure SDRAM_InitStruct; PORT->PORTP_SEL0 = 0xAAAAAAAA; //PP0-23 => ADDR0-23//    PORT->PORTP_SEL1 = 0x00000A0A;       //此处需要调整P23\P22\P19\P18的端口，这几个端口用作SpiFlash的通讯，其中P22是片选，片选作为普通IO端口应用。//如此处没有注意，先初始化SpiFlash，再初始化SDRAM的情况下；或应用中disable SDRAM,再进行开启时，都会把SpiFlash的端口状态进行重置。PORT->PORTP_SEL1 = 0x00004A5A;  PORT->PORTM_SEL0 = 0xAAAAAAAA; //PM0-15 => DATA15-0PORT->PORTM_INEN = 0xFFFF;//PM16 => OEN,PM17 => WEN,PM18 => NORFL_CSN,PM19 => SDRAM_CSN,PM20 => SRAM_CSN,PM21 => SDRAM_CKEPORT->PORTM_SEL1 = 0x888; SDRAM_InitStruct.CellSize = SDRAM_CELLSIZE_64Mb;SDRAM_InitStruct.CellBank = SDRAM_CELLBANK_4;SDRAM_InitStruct.CellWidth = SDRAM_CELLWIDTH_16;SDRAM_InitStruct.CASLatency = SDRAM_CASLATENCY_2;SDRAM_InitStruct.TimeTMRD = SDRAM_TMRD_3;SDRAM_InitStruct.TimeTRRD = SDRAM_TRRD_2;SDRAM_InitStruct.TimeTRAS = SDRAM_TRAS_6;SDRAM_InitStruct.TimeTRC  = SDRAM_TRC_8;SDRAM_InitStruct.TimeTRCD = SDRAM_TRCD_3;SDRAM_InitStruct.TimeTRP  = SDRAM_TRP_3;SDRAM_Init(&SDRAM_InitStruct);

uint16_t lcdbuf_1[800*480] __attribute__((at(SDRAMM_BASE))) ;

LCD

LCD_InitStructure LCD_initStruct; _LCD_BACKLIGHT_PORT_INIT(); //背光控制_LCD_BALKLIGHT_ON(); //点亮背光  PORT->PORTN_SEL0 = 0xAAAAAAAA; //GPION.0~15  LCD_DATA0~15PORT->PORTN_SEL1 = 0xAA;  LCD_initStruct.HnPixel = 800;LCD_initStruct.VnPixel = 480;LCD_initStruct.Hfp = 5;LCD_initStruct.Hbp = 40;LCD_initStruct.Vfp = 8;LCD_initStruct.Vbp = 8;LCD_initStruct.ClkDiv = LCD_CLKDIV_4;LCD_initStruct.ClkAlways = 0;LCD_initStruct.SamplEdge = LCD_SAMPLEDGE_FALL;LCD_initStruct.HsyncWidth = LCD_HSYNC_1DOTCLK;LCD_initStruct.IntEOTEn = 1;//使能中断LCD_Init(LCD, &LCD_initStruct);

void LCD_Handler(void){ LCD_INTClr(LCD); LCD_Start(LCD);}