topic MK64 + FreeRTOS + FlexCAN interrupt in Kinetis Software Development Kit

MK64 + FreeRTOS + FlexCAN interrupt

wfwf — Thu, 02 Feb 2017 16:18:18 GMT

Hello,

I'm trying to make the FlexCan (KSDK 1.3.0) driver work under FreeRTOS (8.2.2) on a Kinetis K64 cpu. In order to configure the CAN, I'm succesfully following the example in C:\Freescale\KSDK_1.3.0\examples\twrk64f120m\driver_examples\flexcan\flexcan_network in a baremetal configuration.

The problem arises using instead FreeRTOS since I'm not getting any interrupt on any incoming CAN message. I'm not putting external API inside the "CAN0_ORed_Message_buffer_IRQHandler" interrupt, but just using the standart IRQ handler provided (See FreeRTOS - Open Source RTOS Kernel for small embedded systems , point 5.)

The configuration of the CAN peripheral using is done before the main thread and the scheduler starts, just after the PE_Low_Level.

According to the FreeRTOS FAQ page I set up the

"#define configASSERT( ( x ) ) if( ( x ) == 0 ) { taskDISABLE_INTERRUPTS(); for( ;; ); }"
for debug purposes

Any Idea on it? how can I double check if the interrupt priority is correct?

Is there any tutorial or link on integrating the CAN on FreeRTOS?

Other interesting discussion FreeRTOS and K64 Interrupt Priority

thank you

Walter

Re: MK64 + FreeRTOS + FlexCAN interrupt

wfwf — Fri, 03 Feb 2017 10:59:35 GMT

news: by repeating the full initialization inside the CAN thread, I succeded in receiving a CAN message. I'll further investigate which initialization part in particular must be repeated. Furthermost, even with this second initialization the "SendBlocking" method doesn't work. The "Send" method works outside the thread but doesn't worh IN the thread. Which is the difference between the two methods?

thank you

Re: MK64 + FreeRTOS + FlexCAN interrupt

xiangjun_rong — Sat, 04 Feb 2017 08:40:06 GMT

Hi,

I think all the driver of serial bus have the same architecture in SDK, I suggest you refer to the example in Freertos:

C:\Freescale\SDK2.0_FRDM_K64F\boards\frdmk64f\rtos_examples\freertos_uart\kds

Xiangjun Rong