71 lines
1.4 KiB
C
71 lines
1.4 KiB
C
#include <avr/io.h>
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#include <avr/pgmspace.h>
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#include "matrix.h"
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#include "led.h"
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#include "wait.h"
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#include "debug.h"
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#define CLK_HI() (PORTD |= (1<<0))
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#define CLK_LO() (PORTD &= ~(1<<0))
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#define STATE() (PIND & (1<<1))
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#define RST_HI() (PORTD |= (1<<3))
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#define RST_LO() (PORTD &= ~(1<<3))
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#define SENSE() (PIND & (1<<2))
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static matrix_row_t matrix[8] = {};
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void matrix_init(void)
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{
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debug_enable = true;
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debug_keyboard = true;
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debug_matrix = true;
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// PD0:Clock PD1:State PD2:Sense_All PD3:Reset(Scan_All)
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DDRD = (1<<3) | (1<<0);
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PORTD = (1<<2) | (1<<1);
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dprintf("init\n");
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}
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uint8_t matrix_scan(void)
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{
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// Scan_all resets counter
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RST_HI();
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wait_us(10);
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// TODO: cannot get reliable value from SENSE()
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//uint8_t s = SENSE() | STATE();
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//if (!SENSE()) return 0; // no activated key
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RST_LO();
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wait_us(10);
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//if (!s) return 0;
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// 8x8 matrix: row:sense, col:drive, key_on:hi
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for (uint8_t col = 0; col < 8; col++) {
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for (uint8_t row = 0; row < 8; row++) {
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CLK_HI();
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wait_us(10);
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if (STATE()) {
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matrix[row] |= (1<<col);
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} else {
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matrix[row] &= ~(1<<col);
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}
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// clock lo - next row
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CLK_LO();
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wait_us(10);
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}
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}
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return 1;
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}
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matrix_row_t matrix_get_row(uint8_t row)
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{
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return matrix[row];
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}
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void led_set(uint8_t usb_led)
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{
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}
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