/Designs/Tools/Oscilloscope/SW/firmware/main.c
0,0 → 1,79
// Oscilloscope firmware, Roman Pavelka, 2011
// written for atmega8
 
#define F_CPU 16000000
#define BAUD 1000000
//#define MYUBRR F_CPU/8/BAUD-1
#define MYUBRR 1
 
#include "./libs/usart.h"
#include "./libs/spi.h"
 
#include <avr/io.h>
#include <avr/interrupt.h>
#include <util/delay.h>
#include <inttypes.h>
 
#define LEN 100
uint8_t data[2*LEN];
 
void measure(void);
void send(void);
 
 
int main (void) {
USART_Init(MYUBRR);
 
DDRB = 0b00100100; //SCK, SS out
PORTB = 0b00000000; // CONV low
 
SPI_MasterInit();
 
sei();
 
while(1) {}
 
return 0;
 
}
 
 
void measure(void) {
uint8_t i;
 
for(i=0;i<LEN;i++) {
PORTB |= 0b00000100;
_delay_us(4);
PORTB &= 0b11111011; //one conversion
 
data[2*i] = SPI_MasterTransmit(0x0);
data[2*i+1] = SPI_MasterTransmit(0x0);
}
}
 
void send(void) {
uint8_t i;
 
for(i=0;i<LEN;i++) {
 
/* USART_Transmit_uint16(data[i]); //ASCII transfer
USART_Transmit('\n');*/
 
USART_Transmit(data[2*i]); //Binary transfer
USART_Transmit(data[2*i+1]);
// USART_Transmit('\n');
 
}
}
 
 
ISR(USART_RXC_vect) {
char data;
 
data=UDR; //must be read to untrigger interupt
 
if (data=='m') {
measure();
send();
}
}