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9-2 led_matrix.c
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/********************************************
程序名称：led_matrix
功能：点阵式LED控制范例代码
版本：v1.0
作者：懒兔子 <[email protected]>
*********************************************/
//包含头文件
#include <core.h>
#include <SPI.h>
//宏定义及全局变量
//点阵LED绘图表
unsigned char matrixTable[36][8] = {
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//0
{0x10,0x30,0x50,0x10,0x10,0x10,0x10,0x10},//1
{0x7E,0x2,0x2,0x7E,0x40,0x40,0x40,0x7E},//2
{0x3E,0x2,0x2,0x3E,0x2,0x2,0x3E,0x0},//3
{0x8,0x18,0x28,0x48,0xFE,0x8,0x8,0x8},//4
{0x3C,0x20,0x20,0x3C,0x4,0x4,0x3C,0x0},//5
{0x3C,0x20,0x20,0x3C,0x24,0x24,0x3C,0x0},//6
{0x3E,0x22,0x4,0x8,0x8,0x8,0x8,0x8},//7
{0x0,0x3E,0x22,0x22,0x3E,0x22,0x22,0x3E},//8
{0x3E,0x22,0x22,0x3E,0x2,0x2,0x2,0x3E},//9
{0x8,0x14,0x22,0x3E,0x22,0x22,0x22,0x22},//A
{0x3C,0x22,0x22,0x3E,0x22,0x22,0x3C,0x0},//B
{0x3C,0x40,0x40,0x40,0x40,0x40,0x3C,0x0},//C
{0x7C,0x42,0x42,0x42,0x42,0x42,0x7C,0x0},//D
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x7C},//E
{0x7C,0x40,0x40,0x7C,0x40,0x40,0x40,0x40},//F
{0x3C,0x40,0x40,0x40,0x40,0x44,0x44,0x3C},//G
{0x44,0x44,0x44,0x7C,0x44,0x44,0x44,0x44},//H
{0x7C,0x10,0x10,0x10,0x10,0x10,0x10,0x7C},//I
{0x3C,0x8,0x8,0x8,0x8,0x8,0x48,0x30},//J
{0x0,0x24,0x28,0x30,0x20,0x30,0x28,0x24},//K
{0x40,0x40,0x40,0x40,0x40,0x40,0x40,0x7C},//L
{0x81,0xC3,0xA5,0x99,0x81,0x81,0x81,0x81},//M
{0x0,0x42,0x62,0x52,0x4A,0x46,0x42,0x0},//N
{0x3C,0x42,0x42,0x42,0x42,0x42,0x42,0x3C},//O
{0x3C,0x22,0x22,0x22,0x3C,0x20,0x20,0x20},//P
{0x1C,0x22,0x22,0x22,0x22,0x26,0x22,0x1D},//Q
{0x3C,0x22,0x22,0x22,0x3C,0x24,0x22,0x21},//R
{0x0,0x1E,0x20,0x20,0x3E,0x2,0x2,0x3C},//S
{0x0,0x3E,0x8,0x8,0x8,0x8,0x8,0x8},//T
{0x42,0x42,0x42,0x42,0x42,0x42,0x22,0x1C},//U
{0x42,0x42,0x42,0x42,0x42,0x42,0x24,0x18},//V
{0x0,0x49,0x49,0x49,0x49,0x2A,0x1C,0x0},//W
{0x0,0x41,0x22,0x14,0x8,0x14,0x22,0x41},//X
{0x41,0x22,0x14,0x8,0x8,0x8,0x8,0x8},//Y
{0x0,0x7F,0x2,0x4,0x8,0x10,0x20,0x7F} };//Z
//功能函数部分
//通过SPI接口写MAX7219寄存器
void MAX7219_Write(unsigned char regAddr,unsigned char data)
{
SPI.transfer(regAddr, SPI_CONTINUE);
SPI.transfer(data, SPI_LAST);
}
//初始化MAX7219芯片
void MAX7219_Init(void)
{
MAX7219_Write(0x09, 0x00);
MAX7219_Write(0x0A, 0x03);
MAX7219_Write(0x0B, 0x07);
MAX7219_Write(0x0C, 0x01);
MAX7219_Write(0x0F, 0x00);
}
//初始化设置部分
void setup()
{
//初始化SPI接口
SPI.begin();
SPI.setDataMode(SPI_MODE2); //CPOL=1, CPHA=1
SPI.setBitOrder(MSBFIRST);
SPI.setClockDivider(SPI_CLOCK_DIV16); //SPI时钟为16分频时钟,750KHz
delay(50);
//初始化MAX7219芯片
MAX7219_Init();
delay(100);
}
//循环执行部分
void loop()
{
//循环显示数字0-9，字母A-Z
for(int j=0;j<36;j++)
{
for(int i=1;i<=8;i++)
MAX7219_Write(i, matrixTable[j][i-1]);
delay(500);
}
}