CCS5.4+Proteus8的F28027实践课六、实验板焊接调试（12864部分）
下班早早回家就是为了把昨天没做完的事情搞完，但等我把12864调完之后，好想找块豆腐撞死算了，RS引脚跳线不知道什么时候被我弄断了，我竟然一直没有检查板子，只顾着对着时序图和寄存器检查程序，哎，直接给大家上效果图吧。
由于12864有背光，一张是站的比较远拍的，一张是贴着12864屏幕拍的。
看完效果图了，直接给大家上程序吧，总共有四个文件。
1、GPIO.c
void InitGpio(void)
{
EALLOW;
// Each GPIO pin can be:
// a) a GPIO input/output
// b) peripheral function 1
// c) peripheral function 2
// d) peripheral function 3
// By default, all are GPIO Inputs
GpioCtrlRegs.GPAMUX1.all = 0x0000; // GPIO functionality GPIO0-GPIO15
GpioCtrlRegs.GPAMUX2.all = 0x0000; // GPIO functionality GPIO16-GPIO31
//GpioCtrlRegs.GPBMUX1.all = 0x0000; // GPIO functionality GPIO32-GPIO34
//GpioCtrlRegs.AIOMUX1.all = 0x0000; // Dig.IO funct. applies to AIO2,4,6,10,12,14
GpioCtrlRegs.GPADIR.all = 0xFFFFFFFF; // GPIO0-GPIO31 are GP outputs
//GpioCtrlRegs.GPBDIR.all = 0x0000; // GPIO32-GPIO34 are inputs
//GpioCtrlRegs.AIODIR.all = 0x0000; // AIO2,4,6,19,12,14 are digital inputs
// Each input can have different qualification
// a) input synchronized to SYSCLKOUT
// b) input qualified by a sampling window
// c) input sent asynchronously (valid for peripheral inputs only)
//GpioCtrlRegs.GPAQSEL1.all = 0x0000; // GPIO0-GPIO15 Synch to SYSCLKOUT
//GpioCtrlRegs.GPAQSEL2.all = 0x0000; // GPIO16-GPIO31 Synch to SYSCLKOUT
//GpioCtrlRegs.GPBQSEL1.all = 0x0000; // GPIO32-GPIO34 Synch to SYSCLKOUT
// Pull-ups can be enabled or disabled.
GpioCtrlRegs.GPAPUD.all = 0xffffff00; // Pullup's enabled GPIO0-GPIO31
//GpioCtrlRegs.GPBPUD.all = 0x0000; // Pullup's enabled GPIO32-GPIO34
//GpioCtrlRegs.GPAPUD.all = 0xFFFF; // Pullup's disabled GPIO0-GPIO31
//GpioCtrlRegs.GPBPUD.all = 0xFFFF; // Pullup's disabled GPIO32-GPIO34
GpioDataRegs.GPADAT.all = 0x00000000;
EDIS;
}2、我自己写的F2802x_LCD12864.h
#ifndef F2802x_LCD12864_H
#define F2802x_LCD12864_H
#define RS GpioDataRegs.GPADAT.bit.GPIO16
#define RW GpioDataRegs.GPADAT.bit.GPIO17
#define EN GpioDataRegs.GPADAT.bit.GPIO18
void WRITEDATA_LCD12864(unsigned char data);
void WRITECMD_LCD12864(unsigned char cmd);
void InitLCD12864(void);
#endif // end of F2802x_LCD12864_H definition3、我自己写的F2802x_LCD12864.c
#include "F2802x_Device.h" // Headerfile Include File
#include "F2802x_Examples.h" // Examples Include File
//---------------------------------------------------------------------------
// WRITEDATA_LCD12864:
//---------------------------------------------------------------------------
// This function writes data to LCD12864
void WRITEDATA_LCD12864(unsigned char data)
{
unsigned long int tmp;
// tmp=GpioDataRegs.GPADAT.all;
tmp=data;
DELAY_US(1000);
RS=1;
RW=0;
EN=0;
GpioDataRegs.GPADAT.all=GpioDataRegs.GPADAT.all&0xffffff00;
DELAY_US(1);
GpioDataRegs.GPADAT.all=GpioDataRegs.GPADAT.all|(0x000000ff&tmp);
DELAY_US(10);
EN=1;
DELAY_US(10);
EN=0;
DELAY_US(1000);
}
//---------------------------------------------------------------------------
// WRITECMD_LCD12864:
//---------------------------------------------------------------------------
// This function writes cmd to LCD12864
void WRITECMD_LCD12864(unsigned char cmd)
{
unsigned long int tmp;
// tmp=GpioDataRegs.GPADAT.all;
tmp=cmd;
DELAY_US(1000);
RS=0;
RW=0;
EN=0;
GpioDataRegs.GPADAT.all=GpioDataRegs.GPADAT.all&0xffffff00;
DELAY_US(1);
GpioDataRegs.GPADAT.all=GpioDataRegs.GPADAT.all|(0x000000ff&tmp);
DELAY_US(10);
EN=1;
DELAY_US(10);
EN=0;
DELAY_US(1000);
}
//---------------------------------------------------------------------------
// InitLCD12864:
//---------------------------------------------------------------------------
// This function initializes the LCD12864 to a known (default) state.
// such as FUNCTION SET,DSIPLAY SET,CLEAR SCREEN
void InitLCD12864(void)
{
DELAY_US(10000);
WRITECMD_LCD12864(0x30);
DELAY_US(1000);
WRITECMD_LCD12864(0x30);
DELAY_US(100);
WRITECMD_LCD12864(0x0c);
DELAY_US(1000);
WRITECMD_LCD12864(0x01);
DELAY_US(10000);
WRITECMD_LCD12864(0x06);
DELAY_US(10000);
}4、主函数main.c
#include "DSP28x_Project.h" // Device Headerfile and Examples Include File
void main(void)
{
// Step 1. Initialize System Control:
// PLL, WatchDog, enable Peripheral Clocks
// This example function is found in the DSP2802x_SysCtrl.c file.
InitSysCtrl();
// Step 2. Initalize GPIO:
// This example function is found in the DSP2802x_Gpio.c file and
// illustrates how to set the GPIO to it's default state.
InitGpio();
// Step 3. Clear all interrupts and initialize PIE vector table:
// Disable CPU interrupts
DINT;
// Initialize PIE control registers to their default state.
// The default state is all PIE interrupts disabled and flags
// are cleared.
// This function is found in the DSP2802x_PieCtrl.c file.
InitPieCtrl();
// Disable CPU interrupts and clear all CPU interrupt flags:
IER = 0x0000;
IFR = 0x0000;
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
// This will populate the entire table, even if the interrupt
// is not used in this example. This is useful for debug purposes.
// The shell ISR routines are found in DSP2802x_DefaultIsr.c.
// This function is found in DSP2802x_PieVect.c.
InitPieVectTable();
// Step 4. Initialize all the Device Peripherals:
// This function is found in DSP2802x_InitPeripherals.c
// InitPeripherals(); // Not required for this example
// Step 5. User specific code:
InitLCD12864();
WRITECMD_LCD12864(0x80);
WRITEDATA_LCD12864('a');
WRITECMD_LCD12864(0x90);
WRITEDATA_LCD12864('a');
WRITECMD_LCD12864(0x88);
WRITEDATA_LCD12864('a');
WRITECMD_LCD12864(0x98);
WRITEDATA_LCD12864('a');
while(1)
{
// GpioDataRegs.GPATOGGLE.all=0x000000ff;
// DELAY_US(1000);
}
}
经过验证，上面12864并行驱动文件是可用的，但是也只是最基础的驱动，像描点、画图、写字符串之类的，大家可以在我的基础上进行补充。等后面我们其他的课程需要串行驱动的时候，我们再来整理串行12864的驱动。今晚先这样了，我要去整理周四答辩的胶片和周五要提交给客户的报告。
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