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#include <stdint.h>
#include <stdbool.h>
#include <string.h>
#include "hal.h"
#include "timer.h"
#include "wait.h"
#include "print.h"
#include "matrix.h"
/*
* Infinity Pinusage:
* Column pins are input with internal pull-down. Row pins are output and strobe with high.
* Key is high or 1 when it turns on.
*
* col: { PTD1, PTD2, PTD3, PTD4, PTD5, PTD6, PTD7 }
* row: { PTB0, PTB1, PTB2, PTB3, PTB16, PTB17, PTC4, PTC5, PTD0 }
*/
/* matrix state(1:on, 0:off) */
static matrix_row_t matrix[MATRIX_ROWS];
static matrix_row_t matrix_debouncing[MATRIX_ROWS];
static bool debouncing = false;
static uint16_t debouncing_time = 0;
void matrix_init(void)
{
/* Column(sense) */
palSetPadMode(GPIOD, 1, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOD, 2, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOD, 3, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOD, 4, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOD, 5, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOD, 6, PAL_MODE_INPUT_PULLDOWN);
palSetPadMode(GPIOD, 7, PAL_MODE_INPUT_PULLDOWN);
/* Row(strobe) */
palSetPadMode(GPIOB, 0, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 1, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 2, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 3, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 16, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOB, 17, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOC, 4, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOC, 5, PAL_MODE_OUTPUT_PUSHPULL);
palSetPadMode(GPIOD, 0, PAL_MODE_OUTPUT_PUSHPULL);
memset(matrix, 0, MATRIX_ROWS);
memset(matrix_debouncing, 0, MATRIX_ROWS);
}
uint8_t matrix_scan(void)
{
for (int row = 0; row < MATRIX_ROWS; row++) {
matrix_row_t data = 0;
// strobe row
switch (row) {
case 0: palSetPad(GPIOB, 0); break;
case 1: palSetPad(GPIOB, 1); break;
case 2: palSetPad(GPIOB, 2); break;
case 3: palSetPad(GPIOB, 3); break;
case 4: palSetPad(GPIOB, 16); break;
case 5: palSetPad(GPIOB, 17); break;
case 6: palSetPad(GPIOC, 4); break;
case 7: palSetPad(GPIOC, 5); break;
case 8: palSetPad(GPIOD, 0); break;
}
wait_us(1); // need wait to settle pin state
// read col data
data = (palReadPort(GPIOD)>>1);
// un-strobe row
switch (row) {
case 0: palClearPad(GPIOB, 0); break;
case 1: palClearPad(GPIOB, 1); break;
case 2: palClearPad(GPIOB, 2); break;
case 3: palClearPad(GPIOB, 3); break;
case 4: palClearPad(GPIOB, 16); break;
case 5: palClearPad(GPIOB, 17); break;
case 6: palClearPad(GPIOC, 4); break;
case 7: palClearPad(GPIOC, 5); break;
case 8: palClearPad(GPIOD, 0); break;
}
if (matrix_debouncing[row] != data) {
matrix_debouncing[row] = data;
debouncing = true;
debouncing_time = timer_read();
}
}
if (debouncing && timer_elapsed(debouncing_time) > DEBOUNCE) {
for (int row = 0; row < MATRIX_ROWS; row++) {
matrix[row] = matrix_debouncing[row];
}
debouncing = false;
}
return 1;
}
bool matrix_is_on(uint8_t row, uint8_t col)
{
return (matrix[row] & (1<<col));
}
matrix_row_t matrix_get_row(uint8_t row)
{
return matrix[row];
}
void matrix_print(void)
{
xprintf("\nr/c 01234567\n");
for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
xprintf("%02X: ");
matrix_row_t data = matrix_get_row(row);
for (int col = 0; col < MATRIX_COLS; col++) {
if (data & (1<<col))
xprintf("1");
else
xprintf("0");
}
xprintf("\n");
}
}
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