56 lines
2.0 KiB
C
56 lines
2.0 KiB
C
#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "const.h"
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#include <string.h>
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volatile uint16_t frame;
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volatile uint16_t line;
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volatile char line_buffer[LINE_BUFFER_SIZE];
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ISR(INT0_vect, ISR_NAKED) {
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asm("jmp int_vertical_sync");
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}
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ISR(INT1_vect, ISR_NAKED) {
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asm("jmp int_horizontal_sync");
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}
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ISR(TIMER0_COMPA_vect, ISR_NAKED) {
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asm("jmp int_timer_0");
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}
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void setup_c() {
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/*
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for (int i = 0; i < LINE_BUFFER_SIZE; ++i) {
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line_buffer[i] = (i % 2) ? 0x0 : 0xff;
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}
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*/
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}
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void loop_c() {
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for (;;) {
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const int current_line = line;
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switch (current_line) {
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case 76: case 134: memcpy(line_buffer, "AAAAAAAAAAAAAAAAAAAAAA", 22); break;
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case 80: memcpy(line_buffer, "11111111AAAA1111111111", 22); break;
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case 84: memcpy(line_buffer, "111111111AAA1111111111", 22); break;
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case 88: case 98: memcpy(line_buffer, "11AAAAA111AA11AAAAAAAA", 22); break;
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case 92: memcpy(line_buffer, "11AAAAAA11AA11AAAAAAAA", 22); break;
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case 102: memcpy(line_buffer, "111111111AAA11111111AA", 22); break;
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case 106: memcpy(line_buffer, "11111111AAAA11111111AA", 22); break;
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case 110: memcpy(line_buffer, "11A111AAAAAA11AAAAAAAA", 22); break;
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case 114: memcpy(line_buffer, "11AA111AAAAA11AAAAAAAA", 22); break;
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case 118: memcpy(line_buffer, "11AAA111AAAA11AAAAAAAA", 22); break;
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case 122: memcpy(line_buffer, "11AAAA111AAA11AAAAAAAA", 22); break;
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case 126: memcpy(line_buffer, "11AAAAA111AA1111111111", 22); break;
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case 130: memcpy(line_buffer, "11AAAAAA11AA1111111111", 22); break;
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}
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line_buffer[60] = (current_line > 50 && current_line < 100) ? WHITE : BLACK;
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if (current_line > 200 && current_line % 8 == 0) {
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const uint8_t current_number = frame >> 2;
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for (uint8_t i = 0; i < 8; ++i) {
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line_buffer[i] = ((current_number >> i) & 0x1) ? WHITE : BLACK;
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}
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}
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}
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}
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