How to use DAC dual Channels simultaneously using DMA

DAC has registers to load both channels in one operation, so direct DMA to one of those registers instead of the data register of the one channel.

Read the Dual DAC channel conversion subchapter in DAC chapter in RM.

JW

PS> Coincidence? https://community.st.com/s/question/0D53W00000HLMJ0SAP/how-to-use-two-dac-channels-simultaneously

Thanks for your quick response.

I gone through the RM and found that I can use DAC_DHR12RD register but I don't know how to direct this data to DMA. In drivers there is an API for DMA as shown below,

"HAL_DAC_Start_DMA (&hdac,DAC_CHANNEL_1,(uint32_t*)Audio.AudioBuffer1,(uint32_t)Audio.TotalSize,DAC_ALIGN_12B_R);

Using this API, I can transmit the data over DAC through channel1 and same for channel -2. But there is no provision for both channels using DMA means I can found such API for both the channels simultaneously. Please give some suggestion.

Waiting for your response.

Regards,

Lalabhai

Maybe there is no provision for dual conversions using DMA in Cube/HAL, I don't know, I don't use Cube.

JW