F28027驱动LCD12864的问题，请教大家

只看该作者 · 2013-8-26 20:20

现在用F28027驱动12864，按照时序进行编程，实在找不到问题，但是就是不能显示，求大家帮帮忙看一下，谢谢了

#include<DSP28x_Project.h>

#define CS GpioDataRegs.GPADAT.bit.GPIO5
#define SID GpioDataRegs.GPADAT.bit.GPIO6
#define CLK GpioDataRegs.GPADAT.bit.GPIO7

void Gpio_Init(void)
      {
                     EALLOW;
                     GpioCtrlRegs.GPAPUD.all=0xFF;
                     GpioCtrlRegs.GPAMUX1.all = 0x00000000;  // All GPIO
                     GpioCtrlRegs.GPAMUX2.all = 0x00000000;  // All GPIO
                     GpioCtrlRegs.GPBMUX1.all = 0x00000000;  // All GPIO
                     GpioCtrlRegs.GPADIR.all = 0xFFFFFFFF; // All outputs
                     GpioCtrlRegs.GPBDIR.all = 0x0000000F; // All outputs
                     EDIS;
      }

void delay(int n)
            {
                     while(n--);
            }

void Sendbyte(unsigned char bytes) //发送一个字节
      {
               unsigned char i;
               for(i=0;i<8;i++)
                     {
                              CLK=1;
                              SID=bytes&0x80; //取出最高位
                              CLK=0;
                              bytes<<=1; //左移
                     }
      }
void write_com(unsigned char com)
      {
            CS=1;
            Sendbyte(0xf8);
            Sendbyte(com&0xf0);
            Sendbyte((com&0x0f)<<4);
            CS=0;
            delay(0xff);
      }
void write_data(unsigned char dat)
      {
            CS=1;
            Sendbyte(0xfa);
            Sendbyte(dat&0xf0);
            Sendbyte((dat&0x0f)<<4);
            CS=0;
            delay(0xff);
      }
void LCD_Init(void)
      {
               write_com(0x01);
               write_com(0x30);
               write_com(0x0c);
               write_com(0x06);
               write_com(0x02);
      }

void main(void)
            {
                     InitSysCtrl();                            //       In this function watchdog is disabled
                  DINT;                                                       //Disable interrupts,this has been done in the "InitPieCtrl();"function
                     InitPieCtrl();                                     //Initial PIE,in this function,interrupts are disabled,Clear all PIEIER registers,Clear all PIEIFR registers
                     IER = 0x0000;
                     IFR = 0x0000;
                     InitPieVectTable();                               //Initialize the PIEvectable,let the interrupts point to their own ISR

                     Gpio_Init();                                              //Gpio initial function
                     LCD_Init();


                     write_com(0x80);
                     write_data(0x02);
                     write_data(0x02);
                     write_data(0x02);
                     while(1);
            }