Receiving HCI HW Error Event from TIWI R2

Paul Stuart62744

Occasionally while sending large data blobs (from TIWI R2 Module to iPad) via bluetooth, I will get an HCI HW Error Event (HCI Packet {0x04 0x10 0x01}) which signals that the TIWI has experienced some sort of HW error and is reporting a code of 0x01.

From what I've read in the HCI spec, the error relates to UART synchronization.

Before I go on a wild goose chase, does anyone know what a HW error code of 0x01 signifies? We are using HW flow control for the UART, so guessing it isn't data overrun. Any insight would be much appreciated.

Thanks,

Paul

over 13 years ago

0 Zahid Haq over 13 years ago

TI__Mastermind 25035 points

HW error code of 0x01 refers to UART_HCI_ERR_NO_BUFFERS_COMMAND error. What is the baud rate you are using? Have you tried changing the HCI UART baud rate to a lower value?

Regards,

0 Paul Stuart62744 over 13 years ago in reply to Zahid Haq

Prodigy 130 points

Hi,

I'm running at 3Mbps, the speed that the TI firmware sets as part of the hciattach initialization.

How do I change the TIWI's baud rate? I've found a copy of an old TI HCI Vendor Specific Commands doc, is there a recent version available?

Do you have any more details about the UART_HCI_ERR_NO_BUFFERS_COMMAND error? I'm not sure how to interpret that.

Thanks!
Paul

0 Zahid Haq over 13 years ago in reply to Paul Stuart62744

TI__Mastermind 25035 points

So what we believe is happpening is that your Bluetooth stack is sending HCI commands without waiting for the command complete event of the previous command.

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Receiving HCI HW Error Event from TIWI R2