/* Copyright 2012 Jun Wako Copyright 2014 Jack Humbert This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 2 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "quantum.h" #include "matrix.h" #include "uart.h" #define UART_MATRIX_RESPONSE_TIMEOUT 10000 void matrix_init_custom(void) { uart_init(1000000); } bool matrix_scan_custom(matrix_row_t current_matrix[]) { uint32_t timeout = 0; bool changed = false; //the s character requests the RF slave to send the matrix uart_write('s'); //trust the external keystates entirely, erase the last data uint8_t uart_data[17] = {0}; //there are 16 bytes corresponding to 16 columns, and an end byte for (uint8_t i = 0; i < 17; i++) { //wait for the serial data, timeout if it's been too long //this only happened in testing with a loose wire, but does no //harm to leave it in here while (!uart_available()) { timeout++; if (timeout > UART_MATRIX_RESPONSE_TIMEOUT) { break; } } if (timeout < UART_MATRIX_RESPONSE_TIMEOUT) { uart_data[i] = uart_read(); } else { uart_data[i] = 0x00; } } //check for the end packet, the key state bytes use the LSBs, so 0xE0 //will only show up here if the correct bytes were recieved if (uart_data[10] == 0xE0) { //shifting and transferring the keystates to the QMK matrix variable for (uint8_t i = 0; i < MATRIX_ROWS; i++) { matrix_row_t current_row = (uint16_t) uart_data[i * 2] | (uint16_t) uart_data[i * 2 + 1] << 8; if (current_matrix[i] != current_row) { changed = true; } current_matrix[i] = current_row; } } return changed; }