92 lines
2.2 KiB
C
92 lines
2.2 KiB
C
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#include <avr/io.h>
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#include <avr/interrupt.h>
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#include "franzis_pp.h"
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#include "framebuffer.h"
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void __attribute__ ((naked)) __attribute__ ((section (".init6"))) franzis_pingpong_init() {
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ROW0_DDR |= (1 << ROW0_PIN);
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ROW1_DDR |= (1 << ROW1_PIN);
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ROW2_DDR |= (1 << ROW2_PIN);
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ROW3_DDR |= (1 << ROW3_PIN);
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ROW4_DDR |= (1 << ROW4_PIN);
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ROW5_DDR |= (1 << ROW5_PIN);
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ROW6_DDR |= (1 << ROW6_PIN);
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ROW7_DDR |= (1 << ROW7_PIN);
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ROW8_DDR |= (1 << ROW8_PIN);
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ROW9_DDR |= (1 << ROW9_PIN);
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COLS_DDR |= (1 << COLS_STR);
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COLS_DDR |= (1 << COLS_DATA);
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COLS_DDR |= (1 << COLS_CLK);
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ROW2_PORT |= (1 << ROW2_PIN);
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COLS_PORT |= (1 << COLS_CLK);
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TCCR2 = (1 << CS22);
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TIMSK = (1 << TOIE2);
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sei();
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}
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void franzis_pingpong_push(uint16_t data) {
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COLS_PORT |= (1 << COLS_STR);
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uint8_t i;
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for (i = 0; i<=11; i++) {
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COLS_PORT &= ~(1 << COLS_CLK);
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if (data & 1) {
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COLS_PORT &= ~(1 << COLS_DATA);
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} else {
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COLS_PORT |= (1 << COLS_DATA);
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}
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COLS_PORT |= (1 << COLS_CLK);
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data = data >> 1;
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}
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COLS_PORT &= ~(1 << COLS_STR);
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}
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void franzis_pingpong_clear_row() {
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ROW0_PORT &= ~(1 << ROW0_PIN);
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ROW1_PORT &= ~(1 << ROW1_PIN);
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ROW2_PORT &= ~(1 << ROW2_PIN);
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ROW3_PORT &= ~(1 << ROW3_PIN);
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ROW4_PORT &= ~(1 << ROW4_PIN);
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ROW5_PORT &= ~(1 << ROW5_PIN);
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ROW6_PORT &= ~(1 << ROW6_PIN);
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ROW7_PORT &= ~(1 << ROW7_PIN);
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ROW8_PORT &= ~(1 << ROW8_PIN);
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ROW9_PORT &= ~(1 << ROW9_PIN);
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}
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void franzis_pingpong_select_row(uint8_t row) {
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switch(row) {
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case 0: ROW0_PORT |= (1 << ROW0_PIN); break;
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case 1: ROW1_PORT |= (1 << ROW1_PIN); break;
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case 2: ROW2_PORT |= (1 << ROW2_PIN); break;
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case 3: ROW3_PORT |= (1 << ROW3_PIN); break;
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case 4: ROW4_PORT |= (1 << ROW4_PIN); break;
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case 5: ROW5_PORT |= (1 << ROW5_PIN); break;
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case 6: ROW6_PORT |= (1 << ROW6_PIN); break;
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case 7: ROW7_PORT |= (1 << ROW7_PIN); break;
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case 8: ROW8_PORT |= (1 << ROW8_PIN); break;
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case 9: ROW9_PORT |= (1 << ROW9_PIN); break;
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}
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}
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uint8_t fb_nextrow = 0;
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ISR(TIMER2_OVF_vect) {
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franzis_pingpong_clear_row();
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uint16_t data = ( framebuffer[fb_nextrow][0] ) | ( framebuffer[fb_nextrow][1] << 8);
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franzis_pingpong_push(data);
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franzis_pingpong_select_row(fb_nextrow);
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fb_nextrow++;
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fb_nextrow = fb_nextrow % 10;
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}
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