本帖最后由 Cjy_JDxy 于 2020-3-25 20:03 编辑
今晚搞了一下MAX7219。代码：
/*
* File: main.c
* Author: Administrator
*
* Created on November 24, 2019, 5:05 PM
*/
// CONFIG1L
#pragma config FEXTOSC = ECH // External Oscillator mode Selection bits (EC (external clock) above 8 MHz; PFM set to high power)
#pragma config RSTOSC = EXTOSC // Power-up default value for COSC bits (EXTOSC operating per FEXTOSC bits (device manufacturing default))
// CONFIG1H
#pragma config CLKOUTEN = OFF // Clock Out Enable bit (CLKOUT function is disabled)
#pragma config CSWEN = ON // Clock Switch Enable bit (Writing to NOSC and NDIV is allowed)
#pragma config FCMEN = ON // Fail-Safe Clock Monitor Enable bit (Fail-Safe Clock Monitor enabled)
// CONFIG2L
#pragma config MCLRE = EXTMCLR // Master Clear Enable bit (MCLR pin (RE3) is MCLR)
#pragma config PWRTE = OFF // Power-up Timer Enable bit (Power up timer disabled)
#pragma config LPBOREN = OFF // Low-power BOR enable bit (Low power BOR is disabled)
#pragma config BOREN = SBORDIS // Brown-out Reset Enable bits (Brown-out Reset enabled , SBOREN bit is ignored)
// CONFIG2H
#pragma config BORV = VBOR_190 // Brown Out Reset Voltage selection bits (Brown-out Reset Voltage (VBOR) set to 1.90V)
#pragma config ZCD = OFF // ZCD Disable bit (ZCD disabled. ZCD can be enabled by setting the ZCDSEN bit of ZCDCON)
#pragma config PPS1WAY = ON // PPSLOCK bit One-Way Set Enable bit (PPSLOCK bit can be cleared and set only once; PPS registers remain locked after one clear/set cycle)
#pragma config STVREN = ON // Stack Full/Underflow Reset Enable bit (Stack full/underflow will cause Reset)
#pragma config XINST = OFF // Extended Instruction Set Enable bit (Extended Instruction Set and Indexed Addressing Mode disabled)
// CONFIG3L
#pragma config WDTCPS = WDTCPS_31// WDT Period Select bits (Divider ratio 1:65536; software control of WDTPS)
#pragma config WDTE = OFF // WDT operating mode (WDT Disabled)
// CONFIG3H
#pragma config WDTCWS = WDTCWS_7// WDT Window Select bits (window always open (100%); software control; keyed access not required)
#pragma config WDTCCS = SC // WDT input clock selector (Software Control)
// CONFIG4L
#pragma config WRT0 = OFF // Write Protection Block 0 (Block 0 (000800-003FFFh) not write-protected)
#pragma config WRT1 = OFF // Write Protection Block 1 (Block 1 (004000-007FFFh) not write-protected)
#pragma config WRT2 = OFF // Write Protection Block 2 (Block 2 (008000-00BFFFh) not write-protected)
#pragma config WRT3 = OFF // Write Protection Block 3 (Block 3 (00C000-00FFFFh) not write-protected)
#pragma config WRT4 = OFF // Write Protection Block 4 (Block 4 (010000-013FFFh) not write-protected)
#pragma config WRT5 = OFF // Write Protection Block 5 (Block 5 (014000-017FFFh) not write-protected)
#pragma config WRT6 = OFF // Write Protection Block 6 (Block 6 (018000-01BFFFh) not write-protected)
#pragma config WRT7 = OFF // Write Protection Block 7 (Block 7 (01C000-01FFFFh) not write-protected)
// CONFIG4H
#pragma config WRTC = OFF // Configuration Register Write Protection bit (Configuration registers (300000-30000Bh) not write-protected)
#pragma config WRTB = OFF // Boot Block Write Protection bit (Boot Block (000000-0007FFh) not write-protected)
#pragma config WRTD = OFF // Data EEPROM Write Protection bit (Data EEPROM not write-protected)
#pragma config SCANE = ON // Scanner Enable bit (Scanner module is available for use, SCANMD bit can control the module)
#pragma config LVP = ON // Low Voltage Programming Enable bit (Low voltage programming enabled. MCLR/VPP pin function is MCLR. MCLRE configuration bit is ignored)
// CONFIG5L
#pragma config CP = OFF // UserNVM Program Memory Code Protection bit (UserNVM code protection disabled)
#pragma config CPD = OFF // DataNVM Memory Code Protection bit (DataNVM code protection disabled)
// CONFIG5H
// CONFIG6L
#pragma config EBTR0 = OFF // Table Read Protection Block 0 (Block 0 (000800-003FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR1 = OFF // Table Read Protection Block 1 (Block 1 (004000-007FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR2 = OFF // Table Read Protection Block 2 (Block 2 (008000-00BFFFh) not protected from table reads executed in other blocks)
#pragma config EBTR3 = OFF // Table Read Protection Block 3 (Block 3 (00C000-00FFFFh) not protected from table reads executed in other blocks)
#pragma config EBTR4 = OFF // Table Read Protection Block 4 (Block 4 (010000-013FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR5 = OFF // Table Read Protection Block 5 (Block 5 (014000-017FFFh) not protected from table reads executed in other blocks)
#pragma config EBTR6 = OFF // Table Read Protection Block 6 (Block 6 (018000-01BFFFh) not protected from table reads executed in other blocks)
#pragma config EBTR7 = OFF // Table Read Protection Block 7 (Block 7 (01C000-01FFFFh) not protected from table reads executed in other blocks)
// CONFIG6H
#pragma config EBTRB = OFF // Boot Block Table Read Protection bit (Boot Block (000000-0007FFh) not protected from table reads executed in other blocks)
// #pragma config statements should precede project file includes.
// Use project enums instead of #define for ON and OFF.
#include <xc.h>
#include <pic18f47q10.h>
#define uchar unsigned char
#define uint unsigned int
#define DIN_0 RD1=0
#define DIN_1 RD1=1
#define LOAD_0 RD2=0
#define LOAD_1 RD2=1
#define CLK_0 RD3=0
#define CLK_1 RD3=1
#define NoOp 0x00 //空操作寄存器
#define Digit0 0x01 // 数码管1寄存器
#define Digit1 0x02 // 数码管2寄存器
#define Digit2 0x03 // 数码管3寄存器
#define Digit3 0x04 // 数码管4寄存器
#define Digit4 0x05 // 数码管5寄存器
#define Digit5 0x06 // 数码管6寄存器
#define Digit6 0x07 // 数码管7寄存器
#define Digit7 0x08 // 数码管8寄存器
#define DecodeMode 0x09 // 译码模式寄存器
#define Intensity 0x0a // 亮度寄存器
#define ScanLimit 0x0b // 扫描位数寄存器
#define ShutDown 0x0c // 低功耗模式寄存器
#define DisplayTest 0x0f // 显示测试寄存器
#define ShutdownMode 0x00 // 低功耗方式
#define NormalOperation 0x01 // 正常操作方式
#define ScanDigit 0x07 // 扫描位数设置，显示8位数码管
#define DecodeDigit 0xff // 译码设置，8位均为BCD码
#define IntensityGrade 0x0a // 亮度级别设置
#define TestMode 0x01 // 显示测试模式
#define TextEnd 0x00 // 显示测试结束，恢复正常工作模式
#define _nop_() asm("nop")
void delay(uint x)
{
uint i,j;
for(i=x;i>0;i--)
for(j=0;j<10;j++);
}
//*************向MAX7219写入字节（8位）********************//
void SendChar (uchar ch)
{
uchar i,temp;
_nop_();
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;
}
}
}
//**************向MAX7219写入字（16位）***************************** //
void WriteWord (uchar addr,uchar num)
{
LOAD_0;
_nop_();
SendChar(addr);
_nop_();
SendChar(num);
_nop_();
LOAD_1; // 锁存进相应寄存器
}
//*********************** MAX7219初始化 ******************//
void InitDisplay(void)
{
WriteWord (ScanLimit,ScanDigit); // 设置扫描界限
WriteWord (DecodeMode,DecodeDigit); // 设置译码模式
WriteWord (Intensity,IntensityGrade); // 设置亮度
WriteWord (ShutDown,NormalOperation); // 设置为正常工作模式
}
void main(void)
{
TRISD=0;
ANSELD=0;
ODCOND=0;
SLRCOND=0;
ADCON0=0;
//WPUE=0x04;
InitDisplay (); // MAX7219初始化
WriteWord(DisplayTest,TestMode); // 开始显示测试，点亮所有LED
delay(1500); // 延时约1.5s
WriteWord (DisplayTest,TextEnd); // 退出显示测试模式
WriteWord (Digit0,0);
WriteWord (Digit1,1);
WriteWord (Digit2,2);
WriteWord (Digit3,3);
while(1)
{
}
return;
}效果图：
MAX7219模块是我自己做的，原理图PCB如下：
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