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freescale: fix i2c_byte_read function #11141

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Merged
merged 1 commit into from
Aug 6, 2019
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freescale: fix i2c_byte_read function #11141

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11 changes: 7 additions & 4 deletions targets/TARGET_Freescale/TARGET_MCUXpresso_MCUS/api/i2c_api.c
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Original file line number Diff line number Diff line change
Expand Up @@ -192,10 +192,8 @@ int i2c_byte_read(i2c_t *obj, int last)
base->C1 |= I2C_C1_TXAK_MASK; // NACK
}

data = (base->D & 0xFF);

/* Change direction to Tx to avoid extra clocks. */
base->C1 |= I2C_C1_TX_MASK;
/* Read dummy to release the bus. */
data = base->D;

/* Wait until data transfer complete. */
while (!(base->S & kI2C_IntPendingFlag))
Expand All @@ -205,6 +203,11 @@ int i2c_byte_read(i2c_t *obj, int last)
/* Clear the IICIF flag. */
base->S = kI2C_IntPendingFlag;

/* Change direction to Tx to avoid extra clocks. */
base->C1 |= I2C_C1_TX_MASK;

data = (base->D & 0xFF);

return data;
}

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