X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=drivers%2Favr%2Fi2c_master.h;h=d68142430ae0de6439be5ab5c841eed3f383bd01;hb=ff0cb0cf9dc81db11459e7e59c01adadca3ec2b8;hp=2479d28d525285475e8c478951b7087c5ed75ddd;hpb=a98a91cf1b923107e9f26df316c1ef2192ff14f7;p=qmk_firmware.git

diff --git a/drivers/avr/i2c_master.h b/drivers/avr/i2c_master.h
index 2479d28d5..d68142430 100755
--- a/drivers/avr/i2c_master.h
+++ b/drivers/avr/i2c_master.h
@@ -1,3 +1,18 @@
+/*  Copyright (C) 2019 Elia Ritterbusch
+ +
+ *  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 3 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 <https://www.gnu.org/licenses/>.
+ */
 /* Library made by: g4lvanix
  * Github repository: https://github.com/g4lvanix/I2C-master-lib
  */
@@ -8,15 +23,24 @@
 #define I2C_READ 0x01
 #define I2C_WRITE 0x00
 
+typedef int16_t i2c_status_t;
+
+#define I2C_STATUS_SUCCESS (0)
+#define I2C_STATUS_ERROR   (-1)
+#define I2C_STATUS_TIMEOUT (-2)
+
+#define I2C_TIMEOUT_IMMEDIATE (0)
+#define I2C_TIMEOUT_INFINITE (0xFFFF)
+
 void i2c_init(void);
-uint8_t i2c_start(uint8_t address);
-uint8_t i2c_write(uint8_t data);
-uint8_t i2c_read_ack(void);
-uint8_t i2c_read_nack(void);
-uint8_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length);
-uint8_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length);
-uint8_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
-uint8_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length);
+i2c_status_t i2c_start(uint8_t address, uint16_t timeout);
+i2c_status_t i2c_write(uint8_t data, uint16_t timeout);
+int16_t i2c_read_ack(uint16_t timeout);
+int16_t i2c_read_nack(uint16_t timeout);
+i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, const uint8_t* data, uint16_t length, uint16_t timeout);
+i2c_status_t i2c_readReg(uint8_t devaddr, uint8_t regaddr, uint8_t* data, uint16_t length, uint16_t timeout);
 void i2c_stop(void);
 
 #endif // I2C_MASTER_H