Dear All,
I develop my project on the:
- Nculeo-L432
- mbed-os-5.13 and v5.12
I try do to use the polling and DMA to read the multiple analog input, from PA_0 and PA_1.
The DMA and Polling got the same result as below:
- The PA_0 value is valid 0v - 3.3v (0 - FFFh) when PA_1 connect to GND.
- The PA_0 value is invalid 0v - 3.3v ( 478h-BB8h) when PA_1 disconnect (floating).
Why PA_1 impact the PA_0 ?
If I try to read the PA_0 and VREFINT (without PA_1), and work well to read the PA_0 and VREFINT.
Can any one help me to solve this problem ?
