LAUNCHXL2-RM57L: Making the LIN2/SCI2 work as SCI2 (UART) with interrupts

Tien Le

Part Number: LAUNCHXL2-RM57L
Other Parts Discussed in Thread: HALCOGEN

Hi,

I am trying to make the LIN2/SCI2 work as SCI2 (UART) with interrupts. I got something running but only partial success. When transmitting, only got interrupts for the first few bytes and then everything stops. For longer data size, the transmission never get to completion. Receiving data behaves similarly, only receive interrupts for the first few bytes, then stops.

HALCOGEN (4.7.1) is used to configure the LIN2. Here are the steps:

1. Enable the drivers:

2. Configure the SCI2 for interrupts

3. Enable the LIN2 high interrupt

4. Set up the PINMUX

5. Generate code.

Functions sciSend() and sciReceive() are used to transmit and receive data. Note that I have enabled SCI3 in a similar way and it works ok. Please advise on what I missed.

Thank you.

over 1 year ago

0 jagadish gundavarapu over 1 year ago

TI__Mastermind 49710 points

Hi Tien,

Can i get your code for easy verification?

--
Thanks & regards,
Jagadish.

0 Tien Le over 1 year ago in reply to jagadish gundavarapu

Prodigy 20 points

Hi Jagadish, please see the attached zip file.

Thanks

uart_test_sci2_20230606.zip

0 jagadish gundavarapu over 1 year ago in reply to Tien Le

TI__Mastermind 49710 points

Hi Tien,

I did some progress on this issue:

Actually, when communication stop working i could see the ESM2.3 error.

And ESM2.3 is a fatal bus error

And when i verify the linker register after getting this error, it is pointing to the " internal_div0" or __aeabi_idiv0

And this error must be due to integer division by zero

But not sure exactly which instruction in code causing this error.

Thanks & regards,
Jagadish.

0 Tien Le over 1 year ago in reply to jagadish gundavarapu

Prodigy 20 points

Thank you, Jagadish, for your investigation into this issue.

I followed your suggestion but unfortunately was unable to get the running code to break at the offending div-by-0 instruction. I created a new simpler project (without using an RTOS) which included both SCI3 and LIN2/SCI2 peripherals and found that they performed ok together. This led me to believe that the RTOS port may contain defects. I will mark this issue as resolved and will focus on the RTOS side of things.

Arm-based microcontrollers

Arm-based microcontrollers forum

LAUNCHXL2-RM57L: Making the LIN2/SCI2 work as SCI2 (UART) with interrupts