RTOS/AM4376: Linux-RT GPIO interrupt issue

zhang huaiyang

Part Number: AM4376

Tool/software: TI-RTOS

Hi,TI:

I use the interrupt to receive the printer's data. But sometimes will receive more data, and sometimes will receive less data, that is, the number of interrupted wrong. I am using the processor is am4376, the environment is PROCESSOR-SDK-LINUX-RT-AM437X 03_01_00_06.Gpio interrupt pin is gpio4_11. In the case of printing the same data, the count in the interrupt service function is different. I do not know what to do, can you help me? Thank you.

over 6 years ago

0 Biser Gatchev-XID over 6 years ago

TI__Guru**** 393215 points

Hi,

Can you please describe in details what you are doing? What is this printer, how is this interrupt generated, what is the ISR supposed to do?

0 zhang huaiyang over 6 years ago in reply to Biser Gatchev-XID

Prodigy 100 points

hi Biser，

thanks，

I tried to use am4376 through gpio interrupt to receive the parallel data, parallel port data from pc, gpio interrupt pin is the parallel port stb signal line, pc generated, each byte has an interruption. The ISR through gpmc read parallel port data and stores it in buff. then sends the data to the parallel printer in the work queue. I count in ISR and found that the count result is different from the data sent by pc.Pc each time to send and am437x received data,difference between one or two bytes.When I run the qt application, the error will be more obvious.

0 Biser Gatchev-XID over 6 years ago in reply to zhang huaiyang

TI__Guru**** 393215 points

I have asked the software team to look at this. They will respond here.

0 Kemal R. Shakir over 6 years ago in reply to Biser Gatchev-XID

TI__Guru 55345 points

Hello huaiyang,

Please, check if you are not falling into this case.

Best regards,
Kemal

0 zhang huaiyang over 6 years ago in reply to Kemal R. Shakir

Prodigy 100 points

hi Kemal，
In fact, changing the status register can not improve the situation. Is the number of interrupts smaller than the actual number of data can not improve it? Very much hope to get guidance.
Thanks a lot.

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RTOS/AM4376: Linux-RT GPIO interrupt issue