/** * matrix.c */ #include <stdint.h> #include <stdbool.h> #include <string.h> #include "quantum.h" #include "matrix.h" #include "tca6424.h" #include "m20add.h" static const uint16_t col_pins[MATRIX_COLS] = MATRIX_COL_PINS; void matrix_init_custom(void) { tca6424_init(); // set port0 tca6424_write_config(TCA6424_PORT0, 0); // set port1 tca6424_write_config(TCA6424_PORT1, 0); // set port2 tca6424_write_config(TCA6424_PORT2, 0xF5); // clear output tca6424_write_port(TCA6424_PORT0, 0); tca6424_write_port(TCA6424_PORT1, 0); tca6424_write_port(TCA6424_PORT2, 0); } static uint8_t row_mask[] = {ROW1_MASK,ROW2_MASK,ROW3_MASK,ROW4_MASK,ROW5_MASK,ROW6_MASK}; static uint8_t col_mask[] = {COL1_MASK, COL2_MASK, COL3_MASK, COL4_MASK, COL5_MASK, COL6_MASK, COL7_MASK, COL8_MASK, COL9_MASK, COL10_MASK, COL11_MASK, COL12_MASK, COL13_MASK, COL14_MASK, COL15_MASK, COL16_MASK}; bool matrix_scan_custom(matrix_row_t current_matrix[]) { bool changed = false; uint8_t p0_data = tca6424_read_port(TCA6424_PORT0); for (int col = 0; col < MATRIX_COLS; col++) { // Select col and wait for col selecton to stabilize switch(col) { case 0: set_pin(col_pins[col]); break; case 1 ... 8: tca6424_write_port(TCA6424_PORT1, col_mask[col]); break; default: tca6424_write_port(TCA6424_PORT0, col_mask[col]|(p0_data&0x01)); break; } matrix_io_delay(); // read row port for all rows uint8_t row_value = tca6424_read_port(ROW_PORT); for (uint8_t row = 0; row < MATRIX_ROWS; row++) { uint8_t tmp = row; // Store last value of row prior to reading matrix_row_t last_row_value = current_matrix[tmp]; // Check row pin state if (row_value & row_mask[row]) { // Pin HI, set col bit current_matrix[tmp] |= (1 << col); } else { // Pin LOW, clear col bit current_matrix[tmp] &= ~(1 << col); } // Determine if the matrix changed state if ((last_row_value != current_matrix[tmp]) && !(changed)) { changed = true; } } // Unselect col switch(col) { case 0: clear_pin(col_pins[col]); break; case 8: tca6424_write_port(TCA6424_PORT1, 0); break; case 15: tca6424_write_port(TCA6424_PORT0, p0_data&0x01); break; default: break; } } return changed; }