Issues while using ADC with DMA(Photon Audio3 example) on E Series

[dreamER]

Hi, here is some awesome approach on how to read analog data as fast as possible without involving DMA maybe can help you somehow

Fast ADC readings

Thats normal, because i measured 10 us for one analogRead() and millis() allso takes some time. There are also interrupts from the system… I found now a solution myself. I was using the wrong commands from the STM32_StdPeriph_Driver lib because i tried to use some from STM32F1xx-generation. Photon is based on STM32F2xx! My working Code with 1.2 µs reading time! /* * returns the counts of a given ADC (ADC1 and AD2, ADC3 wans't working) * takes approx. 1.2 µs */ uint16_t readADCx(ADC_TypeDef*…