functions.c

来自「ICCAVR Rainguage counter program」· C语言 代码 · 共 23 行

#include "config.h"

void uart_putc(unsigned char c) {
   // wait until UDR ready
	while(!(UCSRA & (1 << UDRE))) {};
	UDR = c;    // send character
}

void uart_puts(char *s) {
	//  loop until *s != NULL
	while (*s) {
		uart_putc(*s);
		s++;
	}
}

void SPI_MasterTransmit (char cData)
{
 SPDR = cData;
 while( !(SPDR & (1 <<SPIF)) );
 
}