summaryrefslogtreecommitdiff
path: root/platforms/avr/drivers/i2c_master.c
diff options
context:
space:
mode:
Diffstat (limited to 'platforms/avr/drivers/i2c_master.c')
-rw-r--r--platforms/avr/drivers/i2c_master.c7
1 files changed, 5 insertions, 2 deletions
diff --git a/platforms/avr/drivers/i2c_master.c b/platforms/avr/drivers/i2c_master.c
index 111b55d6b0..d4024378ca 100644
--- a/platforms/avr/drivers/i2c_master.c
+++ b/platforms/avr/drivers/i2c_master.c
@@ -32,6 +32,9 @@
# define I2C_START_RETRY_COUNT 20
#endif // I2C_START_RETRY_COUNT
+#define I2C_ACTION_READ 0x01
+#define I2C_ACTION_WRITE 0x00
+
#define TWBR_val (((F_CPU / F_SCL) - 16) / 2)
#define MAX(X, Y) ((X) > (Y) ? (X) : (Y))
@@ -154,7 +157,7 @@ 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 status = i2c_start(address | I2C_WRITE, timeout);
+ i2c_status_t status = i2c_start(address | I2C_ACTION_WRITE, timeout);
for (uint16_t i = 0; i < length && status >= 0; i++) {
status = i2c_write(data[i], timeout);
@@ -166,7 +169,7 @@ i2c_status_t i2c_transmit(uint8_t address, const uint8_t* data, uint16_t length,
}
i2c_status_t i2c_receive(uint8_t address, uint8_t* data, uint16_t length, uint16_t timeout) {
- i2c_status_t status = i2c_start(address | I2C_READ, timeout);
+ i2c_status_t status = i2c_start(address | I2C_ACTION_READ, timeout);
for (uint16_t i = 0; i < (length - 1) && status >= 0; i++) {
status = i2c_read_ack(timeout);