i2cm: fix ACK reception in i2cm_send_byte

diff --git a/i2cm_sw.c b/i2cm_sw.c
index 8c8e238..0b17452 100644 (file)
--- a/i2cm_sw.c
+++ b/i2cm_sw.c
@@ -160,8 +160,8 @@ uint8_t i2cm_send_byte(uint8_t byte)
        I2CM_DELAY();
        while ( bit_is_clear(PIN(I2CM_SCL_PORT), I2CM_SCL_BIT) );// slave handshake
 
        I2CM_DELAY();
        while ( bit_is_clear(PIN(I2CM_SCL_PORT), I2CM_SCL_BIT) );// slave handshake
 

-       // receive ACK
-       if (bit_is_set(I2CM_SDA_PORT, I2CM_SDA_BIT))
+       // we should receive ACK
+       if (bit_is_set(PIN(I2CM_SDA_PORT), I2CM_SDA_BIT))

                err = I2CM_SENT_NO_ACK;
 
        // clock low
                err = I2CM_SENT_NO_ACK;
 
        // clock low