TMS570LS3137: CAN Bus Receive interrupt only once entered to low level interrupt.

Furkan Gungor

Part Number: TMS570LS3137
Other Parts Discussed in Thread: HALCOGEN

Hi ,

I encountered with interrupt issues during these days. I developed a driver according to halcogen output but i want to improve this software more generic. So my assigments to variables different then Halcogen output.

When I want to use low level interrupt for receive message from can bus i got this issue. Here canREG1->INT value equal to 0x036 but if i try with halcogen output i encountered 0xD800000 which equal to 36 shifted by 16. I checked my code many times but i couldnt see any hint to solve.

here my first assigments to INTMUXx[0] and INTMUXx[1]

after that i enabled 55 message box as rx. I shifted related part of register according to message box number. Shift operations shown below.

where these issues occured ?

Note: Only IF1 Registers used during initialization.

Best Regards,

Furkan

over 1 year ago

0 jagadish gundavarapu over 1 year ago

TI__Guru 70241 points

Hi Furkan,

Furkan Gungor said:
Here canREG1->INT value equal to 0x036 but if i try with halcogen output i encountered 0xD800000 which equal to 36 shifted by 16.

I can't point out exactly what is the mistake but i can give you clarification of results.

If you enabled the High priority interrupt in HALCoGen then the message box number should be in 0-15 bits of INT register.

If you enabled the Low priority interrupt in HALCoGen then the message box number should be in 16-31 bits of INT register.

And i did the same testings at my end. I enabled two message boxes 53 and 54, 53 for transmitting and 54 is for receiving with interrupt.

Here is the result i got after enabling High priority interrupt in HALCoGen:

Here is the result i got after enabling Low priority interrupt in HALCoGen

And i am attaching my code for your reference, as i don't have LS3137 device i did this test on my LC4357 board but both have same CAN module in Hardware.

CAN_LoopBack_TEST_LC4357.zip

You can take this as a reference and verify with your project.

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Thanks & regards,
Jagadish.