Update ps2avrgb template to use standard matrix/i2c code (#4957)
* Update ps2avrgb template to use standard matrix/i2c code * Default to an 8x11 matrix in the ps2avrgb templatepull/2561/head
James Churchill
6 years ago
committed by
MechMerlin
parent
dad66cad40
commit
4c1760883e
@ -1,106 +0,0 @@
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/*
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Copyright 2016 Luiz Ribeiro <luizribeiro@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Please do not modify this file
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#include <avr/io.h>
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#include <util/twi.h>
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#include "i2c.h"
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void i2c_set_bitrate(uint16_t bitrate_khz) {
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uint8_t bitrate_div = ((F_CPU / 1000l) / bitrate_khz);
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if (bitrate_div >= 16) {
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bitrate_div = (bitrate_div - 16) / 2;
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}
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TWBR = bitrate_div;
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}
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void i2c_init(void) {
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// set pull-up resistors on I2C bus pins
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PORTC |= 0b11;
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i2c_set_bitrate(400);
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// enable TWI (two-wire interface)
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TWCR |= (1 << TWEN);
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// enable TWI interrupt and slave address ACK
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TWCR |= (1 << TWIE);
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TWCR |= (1 << TWEA);
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}
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uint8_t i2c_start(uint8_t address) {
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// reset TWI control register
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TWCR = 0;
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// begin transmission and wait for it to end
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TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
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while (!(TWCR & (1<<TWINT)));
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// check if the start condition was successfully transmitted
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if ((TWSR & 0xF8) != TW_START) {
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return 1;
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}
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// transmit address and wait
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TWDR = address;
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TWCR = (1<<TWINT) | (1<<TWEN);
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while (!(TWCR & (1<<TWINT)));
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// check if the device has acknowledged the READ / WRITE mode
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uint8_t twst = TW_STATUS & 0xF8;
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if ((twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK)) {
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return 1;
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}
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return 0;
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}
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void i2c_stop(void) {
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TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
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}
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uint8_t i2c_write(uint8_t data) {
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TWDR = data;
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// transmit data and wait
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TWCR = (1<<TWINT) | (1<<TWEN);
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while (!(TWCR & (1<<TWINT)));
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if ((TWSR & 0xF8) != TW_MT_DATA_ACK) {
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return 1;
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}
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return 0;
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}
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uint8_t i2c_send(uint8_t address, uint8_t *data, uint16_t length) {
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if (i2c_start(address)) {
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return 1;
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}
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for (uint16_t i = 0; i < length; i++) {
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if (i2c_write(data[i])) {
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return 1;
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}
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}
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i2c_stop();
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return 0;
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}
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@ -1,27 +0,0 @@
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/*
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Copyright 2016 Luiz Ribeiro <luizribeiro@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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// Please do not modify this file
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#ifndef __I2C_H__
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#define __I2C_H__
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void i2c_init(void);
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void i2c_set_bitrate(uint16_t bitrate_khz);
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uint8_t i2c_send(uint8_t address, uint8_t *data, uint16_t length);
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#endif
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@ -1,112 +0,0 @@
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/*
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Copyright 2017 Luiz Ribeiro <luizribeiro@gmail.com>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <avr/io.h>
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#include <util/delay.h>
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#include "matrix.h"
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#ifndef DEBOUNCE
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# define DEBOUNCE 5
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#endif
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static uint8_t debouncing = DEBOUNCE;
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static matrix_row_t matrix[MATRIX_ROWS];
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static matrix_row_t matrix_debouncing[MATRIX_ROWS];
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void matrix_set_row_status(uint8_t row);
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uint8_t bit_reverse(uint8_t x);
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void matrix_init(void) {
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// all outputs for rows high
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DDRB = 0xFF;
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PORTB = 0xFF;
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// all inputs for columns
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DDRA = 0x00;
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DDRC &= ~(0x111111<<2);
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DDRD &= ~(1<<PIND7);
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// all columns are pulled-up
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PORTA = 0xFF;
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PORTC |= (0b111111<<2);
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PORTD |= (1<<PIND7);
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// initialize matrix state: all keys off
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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matrix[row] = 0x00;
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matrix_debouncing[row] = 0x00;
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}
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matrix_init_quantum();
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}
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uint8_t matrix_scan(void) {
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for (uint8_t row = 0; row < MATRIX_ROWS; row++) {
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matrix_set_row_status(row);
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_delay_us(5);
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matrix_row_t cols = (
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// cols 0..7, PORTA 0 -> 7
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(~PINA) & 0xFF
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) | (
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// cols 8..13, PORTC 7 -> 0
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bit_reverse((~PINC) & 0xFF) << 8
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) | (
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// col 14, PORTD 7
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((~PIND) & (1 << PIND7)) << 7
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);
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if (matrix_debouncing[row] != cols) {
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matrix_debouncing[row] = cols;
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debouncing = DEBOUNCE;
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}
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}
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if (debouncing) {
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if (--debouncing) {
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_delay_ms(1);
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} else {
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for (uint8_t i = 0; i < MATRIX_ROWS; i++) {
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matrix[i] = matrix_debouncing[i];
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}
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}
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}
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matrix_scan_quantum();
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return 1;
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}
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// declarations
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void matrix_set_row_status(uint8_t row) {
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DDRB = (1 << row);
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PORTB = ~(1 << row);
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}
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uint8_t bit_reverse(uint8_t x) {
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x = ((x >> 1) & 0x55) | ((x << 1) & 0xaa);
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x = ((x >> 2) & 0x33) | ((x << 2) & 0xcc);
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x = ((x >> 4) & 0x0f) | ((x << 4) & 0xf0);
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return x;
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}
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inline matrix_row_t matrix_get_row(uint8_t row) {
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return matrix[row];
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}
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void matrix_print(void) {
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}
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