Created
June 16, 2009 23:14
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just a test of sending data to an atmega
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#include <stdint.h> | |
#include <avr/io.h> | |
#define USART_BAUD 115200ul | |
#define USART_UBBR_VALUE ((F_CPU/(USART_BAUD<<4))-1) | |
void USART_vInit(void) | |
{ | |
UBRRH = (uint8_t)(USART_UBBR_VALUE>>8); | |
UBRRL = (uint8_t)USART_UBBR_VALUE; | |
UCSRC = (0<<USBS)|(1<<UCSZ1)|(1<<UCSZ0); | |
UCSRB = (1<<RXEN)|(1<<TXEN); | |
} | |
void USART_vSendByte(uint8_t u8Data) | |
{ | |
while((UCSRA&(1<<UDRE)) == 0); | |
UDR = u8Data; | |
} | |
uint8_t USART_vReceiveByte() | |
{ | |
while((UCSRA&(1<<RXC)) == 0); | |
return UDR; | |
} | |
int main(void) | |
{ | |
uint8_t u8Data; | |
USART_vInit(); | |
{ | |
u8Data = USART_vReceiveByte(); | |
if (u8Data == "on") { | |
PORTC = 0xFF; | |
PORTC = 0x00; | |
} | |
} | |
} |
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