How to change the number of ranks after ADC initialization

[overthere]

I use 6 ADCs.

I use 3 channels(Ch1, Ch3, Ch13) for ADC1.

I use 3 channels(Ch2, Ch4, Ch15) for ADC2.

Use DMA1 Channel1, DMA1 Channel2 respectively.

DMA1 Channel1 is used by ADC1,

Number Of Conversion is 3, Rank 1 = Ch1, Rank 2 = Ch3, Rank3 = Ch13.

When using 3 channels in DMA1 and during use DMA1 want to receive only one channel as DMA, please inquire how to change it.

ex)

step 1. DMA1 Ch1 - ADC1 Ch1, Ch3, Ch13

step 2. DMA1 Ch1 - ADC1 Ch1,

step 3. DMA1 Ch1 - ADC1 Ch1, Ch3, Ch13

step 4. DMA1 Ch1 - ADC1 Ch1,

step 5. DMA1 Ch1 - ADC1 Ch1, Ch3, Ch13

......

.....

.....

[raptorhal2]

The hard way: change the DMA and ADC registers to the next configuration after each step.

The easy way: When saving conversion results, don't save Ch3 and Ch13 when you don't need them.

Cheers, Hal