TDA4VM: MCU2_0 failed to create udma channel

Hi,

One of them might be used/created in the udma-test functionality. You can probably try disabling ENABLE_UDMA_COPY for the mcu2_0 core.

Regards,

Brijesh

I have commented out the default channel creation code

Hi,

Are you using any of the VPAC modules? It might be used in one of these modules. You can keep breakpoing on Udma_chOpen API to figure out module using this additional block copy channel.

Regards,

Brijesh

Thank you for your guidance. The VPAC module does occupy a block copy channel.
Another question, please give me some guidance. Why is the channel for creating DRU blocked in Udma_chConfigUtc?

The program hangs at utcInfo->druRegs->CHRT[utcChNum].CHRT_CTL, but the printed information looks normal.

wllen said:

Why is the channel for creating DRU blocked in Udma_chConfigUtc?

This should not block, UTC has dedicated channels. Do you mean this blocked after changing number of block copy channels on mcu2_0? UTC is primarily used for VPAC drivers on muc2_0. So have you made any changes in the VPAC drivers? 

Regards,

Brijesh

I allocated 4 block copy channels and 2 DRU channels to MCU2_0. After #undef ENABLE_VHWA_VPAC, the four blocks copy channels can be created normally.
The channel Udma_chOpen of type DMA_UTC_ID_MSMC_DRU0 was successful. After executing Udma_chConfigUtc, it stopped printing, as if the program crashed. I printed the register address information, but everything seemed normal; You can refer to the pictures I posted
VPAC uses UDMA_UTC_ID_VPAC_TC1, but what I currently create is DMA_UTC_ID_MSMC_DRU0 and it fails.

OK, thanks