BQ79600EVM: Uart receive error during autoaddress

Priya Nadathur

Part Number: BQ79600EVM
Other Parts Discussed in Thread: MSP-EXP430FR5994

I have the MSP-EXP430FR5994 setup to receive uart data on interrupt:

MSP-EXP430FR5994: Uart receive overrun error flag - MSP low-power microcontroller forum - MSP low-power microcontrollers - TI E2E support forums

BQ wake up completes successfully. During auto-addressing, the dummy read sequence finishes without receive errors.

When I do the single device reads to read back all device addresses and the register address 0x2001, the uart receive interupt is firing soon after the ReadReg command.

I have the TX_HOLDOFF register set to a 100 bit delay. Regardless of this delay, the UCOE error is happening. Are there any other delays to be used when receiving data from the BQ UART?

over 3 years ago

0 Geoffrey Grimmer over 3 years ago

TI__Intellectual 1760 points

Hi Priya,

Can you describe a little bit more what you mean by "the uart receive interupt is firing soon after the ReadReg command". I guess I don't understand why you want additional delays on the BQ UART? Our expectation from an IC perspective is that the device will transmit data back as soon as the single device read is processed by the target device.

Thanks,

Geoff

0 Priya Nadathur over 3 years ago in reply to Geoffrey Grimmer

Intellectual 545 points

This problem was discussed and resolved in this thread:

MSP-EXP430FR5994: Spurious UART receive - MSP low-power microcontroller forum - MSP low-power microcontrollers - TI E2E support forums

You can close this question.

Thanks

0 Geoffrey Grimmer over 3 years ago in reply to Priya Nadathur

TI__Intellectual 1760 points

Great. Thanks for the update.

Thanks,

Geoff

Power management

Power management forum

BQ79600EVM: Uart receive error during autoaddress