Part Number: TMS320F280039C
Dear Champs,
I am asking this for our customer.
F28039 is used as an I2C slave.
We observed that the I2C my hang and SCL cannot be released (stuck low).
The F280039 I2C is hang by the SCL go low.
In this case, the F280039 does not response as expected.
May I know whether toggling I2CMDR.IRS from 0 to 1 is the only way to reset the I2C module or if there are other recommended recovery methods.
I2CMDR.IRS= 0
I2CMDR.IRS=1
Thank you for your support
Best Regards,
Clark
Hi Clark,
Perhaps try adding some 50µs delay into the I2C R/W interrupt loops. The x39c 120MHz SYSCLK seemingly has race conditions noticed in the serial peripherals latching up.in CCS debug. Especially noticed SPI, SCI FIFO signals PZ silicon not behaving as expected. Seemingly local bus arbiter may be stalling in the data pipe to the CPU accumulator or other registers. Certain flags are being ignored or hang in a race condition, CPU 16-bit transparent address latches seem to latch up at times.
DEVICE_DELAY_US(50);
We observed that the I2C my hang and SCL cannot be released (stuck low).
