uart.c

来自「avr 基于i2c接口的电源管理协议。包括主机发送主机接受从机发送接收。」· C语言 代码 · 共 36 行

//ICC-AVR application builder : 2007-1-9 14:28:21
// Target : M8
// Crystal: 8.0000Mhz

#include <iom8v.h>
#include <macros.h>


//UART0 initialize
// desired baud rate: 9600
// actual: baud rate:9615 (0.2%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSRB = 0x00; //disable while setting baud rate
 UCSRA = 0x02;
 UCSRC = BIT(URSEL) | 0x06;
 UBRRL = 0x67; //set baud rate lo
 UBRRH = 0x00; //set baud rate hi
 UCSRB = 0xF8;
}

#pragma interrupt_handler uart0_rx_isr:12
void uart0_rx_isr(void)
{
 //uart has received a character in UDR

}

#pragma interrupt_handler uart0_tx_isr:14
void uart0_tx_isr(void)
{
 //character has been transmitted

}