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Some code for measuring brightness, but not working yet

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This commit is contained in:
bigalex 2012-08-12 01:35:00 +02:00
parent 7144b7d1d0
commit 933528c133
2 changed files with 60 additions and 9 deletions
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61
firmware/main.c
View File

@ -8,6 +8,13 @@
#include "synth.h"
#include "usart.h"
uint16_t sw_v = 0;
uint16_t darkness = 0;
uint16_t darkval = 0;
uint16_t last_darkval = 0;
static void init_sampletimer(void)
{
/*
@ -54,11 +61,11 @@ static void init_leds(void)
* Timer 2
*/
/* set timer0 to CTC & prescaler 64 → 125kHz increment */
/* set timer2 to CTC & prescaler 64 → ???125kHz increment */
TCCR2A = (1 << WGM21);
TCCR2B = (1 << CS20) | (1 << CS21);
TCCR2B = (1 << CS20)|(1 << CS21);
OCR2A = 6; /* TOP */
OCR2A = 255; /* TOP */
TCNT2 = 0;
/*enable interrupt*/
TIMSK2 |= (1<<OCIE2A);
@ -104,9 +111,14 @@ int main(void)
for(;;) /* ever */ {
//do something
USART0_put_uint16(0x2342);
USART0_crlf();
if (10 == 1){
uint16_t out = darkval;
USART0_put_uint16(out);
USART0_crlf();
//last_darkval=darkval;
};
//USART0_put_uint16(0xA09F);
//USART0_crlf();
};
/* never */ return 0;
@ -118,8 +130,43 @@ ISR(TIMER0_COMPA_vect)
/* calculate next analog sample value in synth mixer:*/
OCR1B = synth_mix();
}
ISR(TIMER2_COMPA_vect)
{
//PORTC = 0b0000000;
darkval++;
switch(sw_v){
case 0 : // Set PC0 to 1 and PC1 to 0 - charge LED
DDRC = 0b00000011;
PORTC = 0b00000010;
darkness = 0;
sw_v++;
break;
case 10 : // set PC0 to 0 and PC1 as input
DDRC = 0b00000001;
PORTC = 0b00000000;
sw_v++;
break;
case 5000 : sw_v = 0;
//darkval = darkness;
//darkval = 1234;
break;
default : //measure if PC1 falls to LOW
if ((darkness==0) && ((PINC && 0b00000010)==0)){
darkness = sw_v;
};
sw_v++;
}; //end switch
//PORTC ^= 0b00001111; //toggle C0, C1, C2,C3
//PORTC = 0;
}

8
firmware/usart.c
View File

@ -121,8 +121,12 @@ void USART0_crlf(){
};
void USART0_put_uint8(uint8_t x){
USART0_putc(((x & 0b11110000)>>4)+0x30);
USART0_putc((x & 0b00001111)+0x30);
uint8_t highchar=((x & 0b11110000)>>4)+0x30;
uint8_t lowchar = (x & 0b00001111)+0x30;
highchar = highchar>0x39 ? highchar + 0x07 : highchar; //chars A to F start with 0x41 not 0x3A
lowchar = lowchar>0x39 ? lowchar + 0x07 : lowchar;
USART0_putc(highchar);
USART0_putc(lowchar);
}
void USART0_put_uint16(uint16_t x){