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// Template - 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 <avr/io.h> |
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#include <avr/interrupt.h> |
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#include <util/delay.h> |
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#include "./libs/usart.h" |
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#include "./libs/spi.h" |
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//#include "./libs/mcp4922.h" |
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//#include "./libs/adc.h" |
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//#include "./libs/timer.h" |
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#define LEN 128 |
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void act(void); |
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void drive(unsigned char t); |
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int main (void) { |
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USART_Init(MYUBRR); |
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PORTC = 0b00000000; // drive port |
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DDRC = 0b00000011; // drive port out |
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DDRB = 0b00101110; //MOSI out CONV out, DAC CS out |
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PORTB = 0b00101010; // SCK, MOSI, CONV, DAC high |
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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 act(void) { |
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unsigned char data[2*LEN]; |
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unsigned char i,j; |
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for(j=0;j<40;j++) { |
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for(i=0;i<LEN;i++) { |
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drive(i); |
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_delay_us(5); |
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} |
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} |
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for(i=0;i<LEN;i++) { |
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drive(i); |
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PORTB |= 0b00000100; |
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_delay_us(4); // converting |
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PORTB &= 0b11111011; |
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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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PORTC=0; |
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for(i=0;i<LEN;i++) { |
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USART_Transmit(data[2*i]); |
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// USART_Transmit(data[2*i+1]); |
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} |
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} |
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void value(void) { |
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unsigned char i,j; |
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long resultH,resultL; |
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resultH=0; |
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resultL=0; |
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for(j=0;j<32;j++) { |
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for(i=0;i<LEN;i++) { |
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drive(i); |
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_delay_us(5); |
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} |
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} |
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for(j=0;j<4;j++) { |
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for(i=0;i<LEN/2;i++) { |
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drive(i); |
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PORTB |= 0b00000100; |
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_delay_us(4); // converting |
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PORTB &= 0b11111011; |
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resultH+=(unsigned char)SPI_MasterTransmit(0x0); |
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resultL+=(unsigned char)SPI_MasterTransmit(0x0); |
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} |
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for(i=LEN/2;i<(LEN/4)*3;i++) { //dela podivnou kvantitatizaci vysledku |
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drive(i); |
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PORTB |= 0b00000100; |
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_delay_us(4); // converting |
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PORTB &= 0b11111011; |
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resultH-=(unsigned char)SPI_MasterTransmit(0x0); |
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resultL-=(unsigned char)SPI_MasterTransmit(0x0); |
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} |
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} |
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PORTC=0; // drive off |
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// resultH *= 256; |
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// USART_Transmit_longnum(resultH+resultL); |
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USART_Transmit_longnum(resultH); |
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USART_Transmit('\n'); |
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} |
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ISR(USART_RXC_vect) { |
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cli(); |
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char c; |
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c=UDR; //must be read to untrigger interupt |
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if (c=='a') |
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act(); |
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else if (c=='v') |
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value(); |
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sei(); |
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} |
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void drive(unsigned char t) { |
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if (t<LEN/2) |
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PORTC = 0b00000001; |
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else |
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PORTC = 0b00000010; |
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} |
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