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