uart01.c

128的串口调试程序

//ICC-AVR application builder : 2009-3-5 20:22:42
// Target : M128
// Crystal: 11.059Mhz

#include <iom128v.h>
#include <macros.h>

void port_init(void)
{
 PORTA = 0xFF;
 DDRA  = 0x00;
 PORTB = 0xFF;
 DDRB  = 0x00;
 POTC = 0xFF; //m103 output only
 DDRC  = 0x00;
 PORTD = 0xFF;
 DDRD  = 0x00;
 PORTE = 0xFF;
 DDRE  = 0x00;
 PORTF = 0xFF;
 DDRF  = 0x00;
 PORTG = 0x1F;
 DDRG  = 0x00;
}

//UART0 initialisation
// desired baud rate: 9600
// actual: baud rate:9600 (0.0%)
// char size: 8 bit
// parity: Disabled
void uart0_init(void)
{
 UCSR0B = 0x00; //disable while setting baud rate
 UCSR0A = 0x00;
 UCSR0C = 0x0E;
 UBRR0L = 0x47; //set baud rate lo
 UBRR0H = 0x00; //set baud rate hi
 UCSR0B = 0x18;
}

//UART1 initialisation
// desired baud rate:2400
// actual baud rate:2400 (0.0%)
// char size: 8 bit
// parity: Disabled
void uart1_init(void)
{
 UCSR1B = 0x00; //disable while setting baud rate
 UCSR1A = 0x00;
 UCSR1C = 0x06;
 UBRR1L = 0x1F; //set baud rate lo
 UBRR1H = 0x00; //set baud rate hi
 UCSR1B = 0x18;
}

//call this routine to initialise all peripherals
void init_devices(void)
{
 //stop errant interrupts until set up
 CLI(); //disable all interrupts
 XDIV  = 0x00; //xtal divider
 XMCRA = 0x00; //external memory
 port_init();
 uart0_init();
 uart1_init();

 MCUCR = 0x00;
 EICRA = 0x00; //extended ext ints
 EICRB = 0x00; //extended ext ints
 EIMSK = 0x00;
 TIMSK = 0x00; //timer interrupt sources
 ETIMSK = 0x00; //extended timer interrupt sources
 SEI(); //re-enable interrupts
 //all peripherals are now initialised
}

/*数据发送，查询方式*/
void Uart0_Transmit(unsigned char data)
{
	while (!(UCR0A & (1<<UDRE0)));		/* 等待发送缓冲器为空*/
	UDR0 = data;						/* 发送数据*/
}
void Uart1_Transmit(unsigned char data)
{
	while (!(UCSR1A & (1<<UDRE1)));		/* 等待发送缓冲器为空*/
	UDR1 = data;						/* 发送数据*/
}

/*数据接收，查询方式*/
unsigned char Uart1_Receive( void ) 
{
	while (!(USR1A & (1<<RXC1)));		/*等待接收数据*/
	return UDR1;						/*获取并返回数据*/
}
unsigned char Uart0_Receive( void ) 
{
	while (!(UCS0A & (1<<RXC0)));		/*等待接收数据*/
	return UDR0;						/*获取并返回数据*/
}
void DelayMs(unsigned int t)      
{
    do
	{ 
		  _NOP();	   
    }while(--t);
}

/*主函数*/
void main(void)
{
	char i;
	init_devices();
	while(1)
	{
	i=Uart0_Receive();
	DelayMs(1000);
	Uart0_Transmit(i);
	}
}