AM6442: FSI with DMA support in MCU-PLUS-SDK for AM6442

Alexander Kurpiers

Part Number: AM6442

I wonder if DMA works with FSI on AM6442.

For other similar chips, it is supported in MCU-PLUS-SDK (e.g. AM263x - fsi_loopback_dma.c), there I see it is using source/drivers/fsi/v1/fsi_tx.c with additional functions FSI_enableTxDMAEvent(), FSI_disableTxDMAEvent() and FSI_enableAndConfigTxTDMMode().

For AM6442 what gets included is source/drivers/fsi/v0/fsi_tx.c - which misses these functions.

However if I check the TRM, the corresponding registers should be there, too - "14.9.4.5 FSITX"

Is this just a software issue in the current version of the MCU-PLUS-SDK and DMA support will come later? Or is there a hardware limitation on AM6442? I did not find anything in the Errata, but indeed the TRM lists in "12.4.5.1.2 FSI Not Supported Featurs ": "External DMA Transfers" and Table 12-434/5 says "Module does not support device DMA Events". Is this the reason?

Regards,

Alexander

3 months ago

0 Swargam Anil 3 months ago

TI__Guru 55158 points

Hello Alexander,

I am looking at your query, and you may expect reply in one or two days.

Regards,

Anil.

0 Swargam Anil 3 months ago in reply to Swargam Anil

TI__Guru 55158 points

Hello Alexander,

AM263x: FSI supports DMA. The TRM lists "DMA support" as a core FSI feature , with dedicated DMA control registers (TX_DMA_CTRL.DMA_EVT_EN and RX_DMA_CTRL.DMA_EVT_EN) for enabling DMA triggers on data frame completion . An SDK example (fsi_loopback_dma) is also available

AM64x: FSI does not support DMA. The AM64x TRM explicitly lists "External DMA Transfers" as a not-supported feature for FSI .

The DMA event tables confirm that neither FSI_TX nor FSI_RX modules support device DMA events on this device .

Regards,

Anil.

0 Alexander Kurpiers 3 months ago in reply to Swargam Anil

Prodigy 30 points

Thanks for the confirmation!

Regards,

Alexander

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AM6442: FSI with DMA support in MCU-PLUS-SDK for AM6442