Using UART interrupt Rx and Tx on C6657

Audrey FRISCH

Hello all,

It's the first time I work with a C66xx device. I have to implement a UART communication using interrupt for reception and transmission.

I have created a project with just a main.c file and I expected to enter in the interrupt uart_isr() after a call to write_UART() or read_UART(). And, in fact, I never enter the interrupt.

Please, could you tell me what I did wrong ? I have insert the project zip to this post.

Thanks in advance.

test_uart.zip

over 9 years ago

0 Raja over 9 years ago

TI__Guru* 81335 points

Hi,
I suggest you to go through configuring interrupt on c66xx keystone devices below.

processors.wiki.ti.com/.../Configuring_Interrupts_on_Keystone_Devices

Thank you.

0 Audrey FRISCH over 9 years ago in reply to Raja

Prodigy 250 points

Yes, I knew this wiki and I have already read it to configure the uart interrupt.

Could you have a quick look on my project and tell me what's going wrong with my configuration ?

0 Shankari G over 9 years ago

TI__Mastermind 43955 points

Hi Audrey FRISCH,
We do have UART example projects in latest processor SDK package.
C:\ti\pdk_c665x_2_0_2\packages\MyExampleProjects\UART_BasicExample_C6657_c66xDMATestProject
C:\ti\pdk_c665x_2_0_2\packages\MyExampleProjects\UART_BasicExample_C6657_c66xExampleProject

software-dl.ti.com/.../index_FDS.html

processors.wiki.ti.com/.../Processor_SDK_-_Create_PDK_projects

0 Audrey FRISCH over 9 years ago in reply to Shankari G

Prodigy 250 points

I have installed PDK and I have already see the uart exemples provided by PDK package but there is no uart interrupt exemple.

0 Raja over 9 years ago in reply to Audrey FRISCH

TI__Guru* 81335 points

Yes, We do not have uart interrupt examples for c66xx devices. Please refer below thread for some example,

0 Audrey FRISCH over 9 years ago in reply to Raja

Prodigy 250 points

The examples provided by TI use high-level functions like UART_write() and UART_read() that I don't want to use. I have written my own functions to do the job.

And download another SDK package for C5000 will take me a lot of time.

Please, I would like you to take a look at the project and tell me if you find something wrong.

0 Raja over 9 years ago in reply to Audrey FRISCH

TI__Guru* 81335 points

Please check the Relevant Resources section, no need to download c5000 package.
e2e.ti.com/.../205473

0 Shankari G over 9 years ago in reply to Audrey FRISCH

TI__Mastermind 43955 points

Hi Audrey FRISCH,

UART interrupt is secondary system interrupt in keystone devices, so you have to setup chip level interrupt controller (CIC) and corepac INTC for the UART interrupt.

Please refer to the below TI wiki page (it also has code snippet to configuring the interrupts)
processors.wiki.ti.com/.../Configuring_Interrupts_on_Keystone_Devices

Also refer to the below TI e2e posts.
e2e.ti.com/.../205473
e2e.ti.com/.../795580

0 Audrey FRISCH over 9 years ago in reply to Shankari G

Prodigy 250 points

I have already read this wiki and I have configured the interrupt according to this wiki page.

I have also viewed the 2 posts you suggest but it didn't help.

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Using UART interrupt Rx and Tx on C6657