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Fix I2C stop condition when receiving 1 byte with USCI #226

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merged 1 commit into from Apr 29, 2013
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Fix I2C stop condition when receiving 1 byte with USCI #226

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5 changes: 5 additions & 0 deletions hardware/msp430/cores/msp430/twi.c
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Expand Up @@ -266,6 +266,11 @@ uint8_t twi_readFrom(uint8_t address, uint8_t* data, uint8_t length, uint8_t sen
#ifdef __MSP430_HAS_USCI__
twi_state = TWI_MRX; // Master receive mode
UCB0CTL1 |= UCTXSTT; // I2C start condition

if(length == 1) { // When only receiving 1 byte..
while(UCB0CTL1 & UCTXSTT); // Wait for start bit to be sent
UCB0CTL1 |= UCTXSTP; // Send I2C stop condition after recv
}
#endif
#ifdef __MSP430_HAS_EUSCI_B0__
twi_state = TWI_MRX; // Master receive mode
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