[FAQ] TDA4VM: How to use main dmtimer for MCU1_0 freeRTOS timer

Hi,

Why do you need to use main domain timer on mcu r5f? There are around 10 mcu domain timer, can you use one of the mcu domain timer on mcu r5f?

Regards,

Brijesh

Hi expert，

   Because we used all 10 MCU domain timer for USS capture.

Hi,

If possible, can you free up one of the mcu domain timer and use main domain timer for USS capture? 

We can try using main domain timer, but can take multiple iterations/more time to get it working..

Rgds,

Brijesh

HI expert，

  For USS Capture，we need timers with Timer_IOs.  In fact，we use 10 MCU dmtimers and 2 main dmtimers.  Because we use SD card to debug SW，If move more dmtimer  to main domain，it will conflict  with the  SD pins.

 Rgds,

wl.wang

Hi expert,

    could you give me your email address? I have got the patch from FAE，but it isn't take effect.May you help to check it?

Hi wl.wang,

We are checking this internally and will get back to you as soon as we have solution..

Regards,

Brijesh

Hi wl.wang,

I have shared the changes with Cary Zhang, can you please get the changes and try them on the board?

Regards,

Brijesh

Hi Brijesh,

 I've shared the changes to Wang, but it failed after they applied the patch on the board. could you give some other tips?

Regards,

Cary

Hi Cary,

Where does it fail? Can you please share some error log? Is it failing in running Os_init? 

Regards,

Brijesh

Hi Brijesh，

  After important the patch，it can't run to main() function, below is the log:

Hi wl.wang,

Do you have JTAG and CCS connection on this board? Can you please connect to mcu1_0 and see where it is stuck/halted? I am suspecting timer19 may not be powered on, which is why it might be stuck. Can you please also try to read Timer19 registers from the CCS memory window and see if there are readable. 

Regards,

Brijesh

Hi British,

  In our company's encryption development environment，the CCS tool can't work well.We use serial port to debug software only.  Could you help to test this patch in your EVM？

Regards

wl.wang

Hi Wang,

ok, which exactly example are you running from SBL? 

Regards,

Brijesh

Hi British，

  The exactly example is can_boot_app_mcu_rtos，the work path is ../mcwsw/mcuss_demos/boot_app_mcu_rtos.

Regards

wl.wang

Hi Wang,

Can you please apply attached patch on top of ti-processor-sdk-rtos-j721s2-evm-08_05_00_11\pdk_j721s2_08_05_00_36 folder and check the output? I am able to run one of the PDK example on mcu1_0 with these changes? 

/cfs-file/__key/communityserver-discussions-components-files/791/FreeRTOS_5F00_Timer19_5F00_For_5F00_MCU1_5F00_0.patch

Essentially, we need to make three changes in order to change timer in the FreeRTOS

1, Changed the timer id ie configTIMER_ID in the appropriate config file of the core. 

2, Make sure that this timer parameters are available in the gDmTimerPInfoTbl table in TimerP_default.c file.

3, Any additional configuration like interrupt router or timer enablement or clock selection should be done as part of Os_init API. 

Regards,

Brijesh

Hi Brijesh，

   This patch takes effect.THanks a lot!

    Why dst_host_irq is 191U? How to calculate? Which header file been referred? I have referred to MCAL GPT driver，it seems like should be 187U?

Hi wl.wang,

We can use any free interrupt from 160 to 191, as per below link. This is the first 32 output pins from Main2MCU Interrupt router and their irq numbers on mcu1_0 is from 160 to 191.. so we can use any free irq in this range. 

https://software-dl.ti.com/tisci/esd/latest/5_soc_doc/j721s2/interrupt_cfg.html#main2mcu-lvl-intrtr0-interrupt-router-output-destinations

Regards,

Brijesh