diff options
Diffstat (limited to 'keyboards/redox/wireless/matrix.c')
| -rw-r--r-- | keyboards/redox/wireless/matrix.c | 70 | 
1 files changed, 70 insertions, 0 deletions
| diff --git a/keyboards/redox/wireless/matrix.c b/keyboards/redox/wireless/matrix.c new file mode 100644 index 0000000000..9c50c9cece --- /dev/null +++ b/keyboards/redox/wireless/matrix.c @@ -0,0 +1,70 @@ +/* Copyright 2017 Mattia Dal Ben + * + * 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[11] = {0}; + +    //there are 10 bytes corresponding to 10 columns, and then an end byte +    for (uint8_t i = 0; i < 11; 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] << 7; +            if (current_matrix[i] != current_row) { +                changed = true; +            } +            current_matrix[i] = current_row; +        } +    } + +    return changed; +} | 
