lpc2103spi模块仿真

#include<LPC21xx.h> #define uint unsigned int #define uchar unsigned char #define HC595 1<<29 void delay(uint dly) { uint i; for(;dly>0;dly--) for(i=0;i<50000;i++); } uchar const LPC2131[7]={0xC7,0x8C,0xC6,0xA4,0xF9,0xB0,0xF9}; void SPI_Init(void) { PINSEL0=(PINSEL0&0xFFFF00FF)|0x00005500;//设置引脚连接SPI S0SPCCR=0x52; //设置SPI时钟分频 S0SPCR=0x30;//(0<<3)| //CPHA0,数据在SCK的第一个时钟沿采样 //(1<<4)| //CPOL1,SCK为低有效 //(1<<5)| //MSTR=1, SPI处于主模式 //(0<<6)| //LSBF0,SPI数据传输MSB（Bit7）在先 //(0<<7); //SPIE=0，SPI中断被禁止 } uint SPI_SendData(uchar data) { IO0CLR=HC595; S0SPDR=data; while(0==(S0SPSR&0x80)); //等待SPIF置位，即等待数据发送完毕 IO0SET=HC595; return S0SPDR; } uint rcv_data; //关于SPI引脚连接 int main(void) { uint i; PINSEL0=0x00005500; //设置SPI引脚连接 PINSEL1=0x00000000; IO0DIR=HC595; //设置74HC595片选为输出 SPI_Init(); //初始化SPI接口 while(1) { for(i=0;i<7;i++) { rcv_data=SPI_SendData(LPC2131[i]);//发送实现数据 delay(15); } } }