2 files changed, 5 insertions, 5 deletions
diff --git a/drivers/avr/i2c_master.c b/drivers/avr/i2c_master.c
index ba6d0d1586..a7364bae08 100755
--- a/drivers/avr/i2c_master.c
+++ b/drivers/avr/i2c_master.c
@@ -121,7 +121,7 @@ int16_t i2c_read_nack(uint16_t timeout) {
   return TWDR;
 }
 
-i2c_status_t i2c_transmit(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout) {
+i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length, uint16_t timeout) {
   i2c_status_t status = i2c_start(address | I2C_WRITE, timeout);
 
   for (uint16_t i = 0; i < length && status >= 0; i++) {
@@ -155,7 +155,7 @@ i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16
   return (status < 0) ? status : I2C_STATUS_SUCCESS;
 }
 
-i2c_status_t i2c_writeReg(uint8_t devaddr, uint8_t regaddr, 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 status = i2c_start(devaddr | 0x00, timeout);
   if (status >= 0) {
     status = i2c_write(regaddr, timeout);
diff --git a/drivers/avr/i2c_master.h b/drivers/avr/i2c_master.h
index 81a7fb5e32..b4613115d9 100755
--- a/drivers/avr/i2c_master.h
+++ b/drivers/avr/i2c_master.h
@@ -22,10 +22,10 @@ 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, uint8_t* data, uint16_t length, 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, 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
-\ No newline at end of file
+#endif // I2C_MASTER_H