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[讨论] 谁弄过LTV350QV-F05 的lcd 帮我看下上电过程错误在那里?

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发表于 2007-3-12 10:05:35 | 显示全部楼层 |阅读模式
我现在在做lcd的上电过程,其中板子是pxa270的,我使用23 24 25 26管脚设置spi,来实现lcd的上电过程。其程序如下:(那位大哥能帮我看看错误在那里,谢谢)
const unsigned short LCD_REGS_VAL[19]={
    0x409D,0x0204,0x0100,0x3000,0x4003,0x000A,0x0021,0x0C00,  
    0x0000,/*reg 9 at Instruction Setting not set */
    0x0103,0x0301,0x1F0F,0x1F0F,0x0707,0x0307,0x0707,0x0000,0x0004,0x0000
};
//先高位后低位
void  LCD_SEL_REG(unsigned char REGX)
{
   volatile SSP_REGS *g_pSSPRegs = (volatile SSP_REGS *)SSP1_BASE_U_VIRTUAL;
    while(!(g_pSSPRegs->ssr&0x10));  /*wait tx ready*/  
       g_pSSPRegs->ssdr=0x2e;         
    while(!(g_pSSPRegs->ssr&0x10));  
       g_pSSPRegs->ssdr=0x00;         
    while(!(g_pSSPRegs->ssr&0x10));  
       g_pSSPRegs->ssdr=REGX;         
}
   
//先高位后低位!!!
LCD_SET_DATA(unsigned short SVAL)  
{
  volatile SSP_REGS *g_pSSPRegs = (volatile SSP_REGS *)SSP1_BASE_U_VIRTUAL;
    while(!(g_pSSPRegs->ssr&0x10));  /*wait tx ready*/
         g_pSSPRegs->ssdr=0x6e;         
       while(!(g_pSSPRegs->ssr&0x10));  
        g_pSSPRegs->ssdr=(SVAL&0xff00)>>8;      
       while(!(g_pSSPRegs->ssr&0x10));
         g_pSSPRegs->ssdr=SVAL&0x00ff;  
}

void SetupSPI(void)
{
     
   volatile XLLP_GPIO_T *g_pGPIORegs = (volatile XLLP_GPIO_T *)GPIO_BASE_U_VIRTUAL;
   volatile XLLP_CLKMGR_T *g_pClockRegs =(volatile XLLP_CLKMGR_T*)CLK_BASE_U_VIRTUAL;
   volatile SSP_REGS *g_pSSPRegs = (volatile SSP_REGS *)SSP1_BASE_U_VIRTUAL;
   while(!g_pGPIORegs)
   {
     EdbgOutputDebugString("GPIO FAILED\r\n");
   }
   while(!g_pClockRegs)
   {
     EdbgOutputDebugString("CLOCK FAILED\r\n");
   }
   while(!g_pSSPRegs)
   {
     EdbgOutputDebugString("SSP FAILED\r\n");
   }
   // disable Unit clock
   g_pClockRegs->cken &= ~XLLP_CLKEN_SSP1;
    // disable SSP1
   g_pSSPRegs->sscr0 &= ~SSE_ENABLE;
    // Set up the GPIO24=SFRM = 1 (GPSR0)
    //g_pGPIORegs->GPSR0 |= (GPIO_24_SFRM );
    // Program direction of the GPIOs (GPDR0)
    // (GPIO23/24/25 as outputs)
  g_pGPIORegs->GPDR0 |= GPIO_23_SCLK;
  g_pGPIORegs->GPDR0 |= GPIO_24_SFRM;
  g_pGPIORegs->GPDR0 |= GPIO_25_MOSI;
  g_pGPIORegs->GPDR0 &= ~GPIO_26_MISO;
    // Program GPIO alternate function register (GAFR0_U)
  g_pGPIORegs->GAFR0_U &= 0xFFC03FFF;
  g_pGPIORegs->GAFR0_U |= GPIO_23_AF2_SSPSCLK;
   // GPIO24 is used here as GPO
   //可以设置GPIO24
g_pGPIORegs->GAFR0_U |=GPIO_24_AF2_SSPSFRM;
g_pGPIORegs->GAFR0_U |= GPIO_25_AF2_SSPTXD;
g_pGPIORegs->GAFR0_U |= GPIO_26_AF1_SSPRXD;
   // Set up SSP registers (when disabled SSP)
   // set up SSP control register 0 and 1
  g_pSSPRegs->sscr0 = (SCR_7_KHZ | SSE_DISABLE | ECS_INTERNAL |FRF_MOTOROLA | DSS_16_BIT );
  g_pSSPRegs->sscr1 = (RFT_SEVEN | TFT_ZERO | MWDS_8_BIT | SPH_HALF_DELAY |SPO_IDLE_LOW | LBM_DISABLE | TIE_DISABLE | RIE_DISABLE );
                // Enable SSP last
   //g_pGPIORegs->GPCR0 |= (GPIO_24_SFRM );
  g_pSSPRegs->sscr0 |= SSE_ENABLE;
                       // enable SPI1 Unit clock
g_pClockRegs->cken |= XLLP_CLKEN_SSP1;
          // DumpRegsGPIO();
          // DumpRegsSSP();
          // DumpRegsClock();
  }
  
  
void lcdPowerUp(void)
{
    int i;
    volatile SSP_REGS *g_pSSPRegs = (volatile SSP_REGS *)SSP1_BASE_U_VIRTUAL;
    volatile XLLP_GPIO_T *g_pGPIORegs = (volatile XLLP_GPIO_T *)GPIO_BASE_U_VIRTUAL;
   
    SetupSPI(true);                   //spi init
    g_pGPIORegs->GPCR0&=(0x01<<24);           //set cs Low
   
    //2.delay 5ms ->R09 = 0000h
    msWait(5);              //delay 5ms
    LCD_SEL_REG(9);
    LCD_SET_DATA(0x0);
    //3.delay More than 10ms ->Power Setting Function 1 ->(R09 ← 4000h  R0A ← 2000h)
    msWait(10);              //delay 10ms
    LCD_SEL_REG(9);
    LCD_SET_DATA(0x4000);
    LCD_SEL_REG(10);
    LCD_SET_DATA(0x2000);
    //4.                       Power Setting Function 2  -> R09 ← 4055h
    LCD_SEL_REG(9);
    LCD_SET_DATA(0x4055);
    //5.delay more than 50ms   Instruction Setting
    msWait(50);              //delay 50ms
    for(i=0;i<sizeof(LCD_REGS_VAL);i++){
        if(i!=8){
            LCD_SEL_REG(i+1);
             LCD_SET_DATA(LCD_REGS_VAL);
        }
    }
   //6.Wait more than 2 Frames
   msWait(27);              //delay  27ms
   //7.Display On Sequence ->R09 ← 4A55h R05 ← 5003h
   LCD_SEL_REG(9);
   LCD_SET_DATA(0x4A55);
   LCD_SEL_REG(5);
   LCD_SET_DATA(0x5003);
  
   g_pGPIORegs->GPCR0&=0x000000;
   
}
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