折腾一下Atmega328p Xplained mini-串口

zhzhx66

建立新工程

选择片子ATmega328p

添加源代码

#define F_CPU 16000000UL

#define BAUD 9600

#define PUTBAUD F_CPU/16/BAUD-1

#include <avr/io.h>

#include <stdio.h>

#include <stdint.h>

#include <util/delay.h>

void Init_USART(uint16_t ubrr)

{

/*Set baud rate */

UBRR0H = (unsigned char)(ubrr>>8);

UBRR0L = (unsigned char)ubrr;

/*Enable receiver and transmitter */

UCSR0B = (1<<RXEN0)|(1<<TXEN0);

/* Set frame format: 8data, 2stop bit */

UCSR0C = (1<<USBS0)|(3<<UCSZ00);

}

void PutChar(char c)

{

/* Wait for empty transmit buffer */

while ( !( UCSR0A & (1<<UDRE0)) );

/* Put data into buffer, sends the data */

UDR0 = c;

}

void PutStr(char *s)

{

while(*s)PutChar(*s++);

}

int thisByte;

char Str[50];

int main(void)

{

Init_USART( PUTBAUD);

while(1)

{

sprintf(Str,"%s"," A~Z Character Map\r\n");

PutStr(Str);

for (thisByte = 'A';thisByte<='Z';thisByte++)

{

sprintf(Str,"%c , DEC: %d , HEX: 0x%x\r\n ",thisByte,thisByte,thisByte);

PutStr(Str);

}

_delay_ms(2000);

}

}

编译通过

配置调试仿真口

下载仿真结果

最后奉上工程源码。

UART_TEST.zip (39.51 KB, 下载次数: 15)

2015-2-1 00:08 上传

点击文件名下载附件

sky-Hawk where

很详细。