videochargen/main.c

#include <avr/io.h>
#include <avr/interrupt.h>
#include "const.h"
#include <string.h>

volatile uint16_t frame;
volatile uint16_t line;
volatile char line_buffer[LINE_BUFFER_SIZE];

ISR(INT0_vect, ISR_NAKED) {
    asm("jmp int_vertical_sync");
}
ISR(INT1_vect, ISR_NAKED) {
    asm("jmp int_horizontal_sync");
}
ISR(TIMER0_COMPA_vect, ISR_NAKED) {
    asm("jmp int_timer_0");
}

void setup_c() {
}
first commit vertical line at about 1/3 of the horizontal line 2021-06-26 17:15:17 +00:00			`#include <avr/io.h>`
			`#include <avr/interrupt.h>`
introduced line buffer of 160 pixel 2021-07-03 13:02:01 +00:00			`#include "const.h"`
an hardcoded demo prints "RE", a vertical line, and a counter 2021-07-03 14:42:32 +00:00			`#include <string.h>`
introduced line buffer of 160 pixel 2021-07-03 13:02:01 +00:00
line buffer dynamic update 2021-07-03 13:44:01 +00:00			`volatile uint16_t frame;`
			`volatile uint16_t line;`
			`volatile char line_buffer[LINE_BUFFER_SIZE];`
first commit vertical line at about 1/3 of the horizontal line 2021-06-26 17:15:17 +00:00
"diagonal line" not vertically locked, just a test also not the whole screen, just a bit 2021-06-26 20:34:22 +00:00			`ISR(INT0_vect, ISR_NAKED) {`
"diagonal line" not the whole screen, but vertically locked actually it has some issues, there is a single dot (at the end/beginning of a cycle) that messes up the horizontal sync and moves all the picture... must be fixed 2021-06-26 21:42:23 +00:00			`asm("jmp int_vertical_sync");`
			`}`
			`ISR(INT1_vect, ISR_NAKED) {`
			`asm("jmp int_horizontal_sync");`
first commit vertical line at about 1/3 of the horizontal line 2021-06-26 17:15:17 +00:00			`}`
semi working timer for skipping back porch 2021-07-03 09:54:31 +00:00			`ISR(TIMER0_COMPA_vect, ISR_NAKED) {`
			`asm("jmp int_timer_0");`
			`}`
introduced line buffer of 160 pixel 2021-07-03 13:02:01 +00:00
line buffer dynamic update 2021-07-03 13:44:01 +00:00			`void setup_c() {`
			`}`