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author | TurboMech <sarmstrong240@gmail.com> | 2018-01-03 05:48:09 -0500 |
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committer | Jack Humbert <jack.humb@gmail.com> | 2018-01-03 10:32:53 -0500 |
commit | 9cb1d36974b7ea4c380c0b7818812f6f5aae56c1 (patch) | |
tree | 161b1b36ac787aed9f7c7959dd756315c435dcbc /keyboards/mechmini/i2c.c | |
parent | 0a5d302622b440183fbb42593fd07c4da11abba3 (diff) | |
download | firmware-9cb1d36974b7ea4c380c0b7818812f6f5aae56c1.tar.gz firmware-9cb1d36974b7ea4c380c0b7818812f6f5aae56c1.tar.bz2 firmware-9cb1d36974b7ea4c380c0b7818812f6f5aae56c1.zip |
Added Mechmini 2.0 to Mechmini keyboard folder
This creates a v1 and v2 subproject. V1 retains all the same implementations of the bootmapper-ported Mechmnini 1 including #2196. V2 adds the Mechmini 2.0 kayboard support (I know it took me way to long to get it a pull request in).
All readme's updated to reflect compiling the two seperate keyboards. Simply either `make mechmini/v1:default` or `make mechmini/v2:defualt`. Utilizing the rules.mk using `make mechmini:default` will automatically create the Mechmini 2 default keymap as this is the current version and has a much wider user base.
Diffstat (limited to 'keyboards/mechmini/i2c.c')
-rw-r--r-- | keyboards/mechmini/i2c.c | 104 |
1 files changed, 0 insertions, 104 deletions
diff --git a/keyboards/mechmini/i2c.c b/keyboards/mechmini/i2c.c deleted file mode 100644 index c27f3e3d1..000000000 --- a/keyboards/mechmini/i2c.c +++ /dev/null @@ -1,104 +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/>. -*/ - -#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; -} |