[Keyboard] Refactor budget96 to remove custom i2c code in favor of QMK i2c_master...

[qmk_firmware.git] / keyboards / donutcables / budget96 / i2c.c

diff --git a/keyboards/donutcables/budget96/i2c.c b/keyboards/donutcables/budget96/i2c.c
deleted file mode 100644 (file)
index e8c4455..0000000
--- a/keyboards/donutcables/budget96/i2c.c
+++ /dev/null
@@ -1,106 +0,0 @@
-/*
-Copyright 2016 Luiz Ribeiro <luizribeiro@gmail.com>
-
-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/>.
-*/
-
-// Please do not modify this file
-
-#include <avr/io.h>
-#include <util/twi.h>
-
-#include "i2c.h"
-
-void i2c_set_bitrate(uint16_t bitrate_khz) {
-    uint8_t bitrate_div = ((F_CPU / 1000l) / bitrate_khz);
-    if (bitrate_div >= 16) {
-        bitrate_div = (bitrate_div - 16) / 2;
-    }
-    TWBR = bitrate_div;
-}
-
-void i2c_init(void) {
-    // set pull-up resistors on I2C bus pins
-    PORTC |= 0b11;
-
-    i2c_set_bitrate(400);
-
-    // enable TWI (two-wire interface)
-    TWCR |= (1 << TWEN);
-
-    // enable TWI interrupt and slave address ACK
-    TWCR |= (1 << TWIE);
-    TWCR |= (1 << TWEA);
-}
-
-uint8_t i2c_start(uint8_t address) {
-    // reset TWI control register
-    TWCR = 0;
-
-    // begin transmission and wait for it to end
-    TWCR = (1<<TWINT) | (1<<TWSTA) | (1<<TWEN);
-    while (!(TWCR & (1<<TWINT)));
-
-    // check if the start condition was successfully transmitted
-    if ((TWSR & 0xF8) != TW_START) {
-        return 1;
-    }
-
-    // transmit address and wait
-    TWDR = address;
-    TWCR = (1<<TWINT) | (1<<TWEN);
-    while (!(TWCR & (1<<TWINT)));
-
-    // check if the device has acknowledged the READ / WRITE mode
-    uint8_t twst = TW_STATUS & 0xF8;
-    if ((twst != TW_MT_SLA_ACK) && (twst != TW_MR_SLA_ACK)) {
-        return 1;
-    }
-
-    return 0;
-}
-
-void i2c_stop(void) {
-    TWCR = (1<<TWINT) | (1<<TWEN) | (1<<TWSTO);
-}
-
-uint8_t i2c_write(uint8_t data) {
-    TWDR = data;
-
-    // transmit data and wait
-    TWCR = (1<<TWINT) | (1<<TWEN);
-    while (!(TWCR & (1<<TWINT)));
-
-    if ((TWSR & 0xF8) != TW_MT_DATA_ACK) {
-        return 1;
-    }
-
-    return 0;
-}
-
-uint8_t i2c_send(uint8_t address, uint8_t *data, uint16_t length) {
-    if (i2c_start(address)) {
-        return 1;
-    }
-
-    for (uint16_t i = 0; i < length; i++) {
-        if (i2c_write(data[i])) {
-            return 1;
-        }
-    }
-
-    i2c_stop();
-
-    return 0;
-}