Tiva C CAN does not receive message

madoka

Other Parts Discussed in Thread: EK-TM4C1294XL

Hi all,

I migrate project from stellaris to Tiva C. I test CAN module. but it does not work. neither receive nor transmit.

I am running CCS 6.0, TI-RTOS 2.0.2.36, Tiva C 2.1.0.12573c

CAN transceiver is installed. I set a break point at CAN0_IntHandler(). no expect object received.

I followed migration from stellaris to Tiva C doc.

What I suppose to check?

Please help !

Thanks in advance

0 madoka over 10 years ago

BTW, i am using EK-TM4C1294XL lauchpad evaluation board

I realized Can0 interrupt vector is 54 which is different in stellaris 55.

I checked pins as well. I am using PortA0, PortA1 for Can0.

what I missed or messed up?

0 Amit Ashara over 10 years ago in reply to madoka

Hello Madoka,

Did you change the jumper position on the EK-TM4C129 so that CAN function can be accessed instead of being connected to the ICDI-COM?

Regards

Amit

0 madoka over 10 years ago in reply to Amit Ashara

I changed jumper(JP4, JP5) for UART and CAN option.

In CAN0_IntHandler() function, I have ulStatus = CANIntStatus(CAN0_BASE, CAN_INT_STS_CAUSE),

ulStatus is always CAN_INT_INTID_STATUS.

any clue?

0 Amit Ashara over 10 years ago in reply to madoka

Hello Madoka,

Can you please share the updated CCS project for TM4C129?

Regards

Amit

0 madoka over 10 years ago in reply to Amit Ashara

SysCtlClockFreqSet((SYSCTL_XTAL_16MHZ | SYSCTL_OSC_INT | SYSCTL_USE_PLL | SYSCTL_CFG_VCO_480), 120000000);

set the clock frequency will resolve the issue.

Dont understand why in stellaris series do not need to set the frequency. it automatically runs at 80MHz

Thanks Amit

Madoka

Arm-based microcontrollers forum