| 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(); |
| } |
| } |