【AC7811开发板试用活动】+MAX7219

1万 · 2019-10-14 19:11

收到板子了，首先搞一个MAX7219的驱动程序。
代码：
#include "ac78xx_gpio.h"
#include "ac78xx_debugout.h"
#include "ac78xx.h"

#define uchar unsigned char
#define uint unsigned int

/* makesure n < 16 */
#define PAout(n) BIT_ADDR(GPIOA_ODR_ADDR, n)
#define PAin(n) BIT_ADDR(GPIOA_IDR_ADDR, n)

#define PBout(n) BIT_ADDR(GPIOB_ODR_ADDR, n)
#define PBin(n) BIT_ADDR(GPIOB_IDR_ADDR, n)

#define PCout(n) BIT_ADDR(GPIOC_ODR_ADDR, n)
#define PCin(n) BIT_ADDR(GPIOC_IDR_ADDR, n)

#define PDout(n) BIT_ADDR(GPIOD_ODR_ADDR, n)
#define PDin(n) BIT_ADDR(GPIOD_IDR_ADDR, n)

#define PEout(n) BIT_ADDR(GPIOE_ODR_ADDR, n)
#define PEin(n) BIT_ADDR(GPIOE_IDR_ADDR, n)

/* gpio bit-band control */
#define LED PAout(0)

#define CLK_0          PAout(4)=0
#define CLK_1          PAout(4)=1
#define LOAD_0       PAout(2)=0
#define LOAD_1       PAout(2)=1
#define DIN_0          PAout(0)=0
#define DIN_1          PAout(0)=1

#define NoOp 0x00          //??????
#define Digit0 0x01          // ???1???
#define Digit1 0x02          // ???2???
#define Digit2 0x03          // ???3???
#define Digit3 0x04          // ???4???
#define Digit4 0x05          // ???5???
#define Digit5 0x06          // ???6???
#define Digit6 0x07          // ???7???
#define Digit7 0x08          // ???8???

#define DecodeMode 0x09    // ???????
#define Intensity 0x0a       // ?????
#define ScanLimit 0x0b       // ???????
#define ShutDown 0x0c       // ????????

#define DisplayTest 0x0f    // ???????
#define ShutdownMode 0x00    // ?????
#define NormalOperation 0x01  // ??????
#define ScanDigit 0x07       // ??????,??8????
#define DecodeDigit 0xff    // ????,8???BCD?
#define IntensityGrade 0x0a // ??????
#define TestMode 0x01       // ??????
#define TextEnd 0x00       // ??????,????????

/*****************************************************************************
* Function implementation - global ('extern') and local ('static')
******************************************************************************/
uchar DisBuffer[8]={0,0,0,0,0,0,0,0}; // ?????
//******************??t??**************************************
void delay(uint t)
{
   uint i;
   while(t--)
   {
            /* ??12M??,???1ms */
            for (i=0;i<125;i++)
            {}
   }
}
//*************?MAX7219????(8?)********************
void SendChar (uchar ch)
{
uchar i,temp;
delay(1);
for (i=0;i<8;i++)
{
      temp=ch&0x80;
      ch=ch<<1;
      if(temp)
      {
         DIN_1;
         CLK_0;
         CLK_1;
      }
      else
      {
         DIN_0;
         CLK_0;
         CLK_1;
      }
}
}
//**************?MAX7219???(16?)*****************************
void WriteWord (uchar addr,uchar num)
{
LOAD_0;
delay(1);
SendChar(addr);
delay(1);
SendChar(num);
delay(1);
LOAD_1;                         // ????????
}
//*********************** MAX7219??? ******************
void InitDisplay (void)
{
WriteWord (ScanLimit,ScanDigit);       // ??????
WriteWord (DecodeMode,DecodeDigit);    // ??????
WriteWord (Intensity,IntensityGrade); // ????
WriteWord (ShutDown,NormalOperation); // ?????????

}

/**
* main
*
* @param[in]  none
* @return none
*
* @brief  entry
*
*/
int main(void)
{
InitDebug(); //´òÓ¡³õÊ¼»¯
InitDelay(); //ÑÓÊ±º¯Êý³õÊ¼»¯

GPIO_SetDir(GPIO_PA0, 1);
GPIO_SetDir(GPIO_PA2, 1);
GPIO_SetDir(GPIO_PA4, 1);
InitDisplay (); // MAX7219???
WriteWord(DisplayTest,TestMode);  // ??????,????LED
delay(1500);                   // ???1.5s
WriteWord (DisplayTest,TextEnd);  // ????????
WriteWord (Digit0,0);
WriteWord (Digit1,1);
WriteWord (Digit2,2);
WriteWord (Digit3,3);
while (1)
{
//       LED = !LED;
//       mdelay(500);
}
}
效果图：