2024-09-01 02:22 PM
Hello...
I am using a Nucleo-L476RG dev board along with https://github.com/STMicroelectronics/STM32CubeL4 . I have built the code for PWR_STOP1_RTC and am trying to measure ground current. I have a 10 ohm resistor on the ground side of 3.2V battery. I have removed JP6 and JP5 on the board. I am using a USB PicoScope. At the moment I have two issues:
1. I load the FW onto the target but I don't understand why this FW does NOT seem to run if I don't keep the usb connected to the nucleo? Why is this? I would like to disconnect this as it is just a source of noise and I am getting no where near the approx. 4 uA - 20 uA the datasheet specifies.
2. For some reason the ground current (when 1. above is connected) measures negative? I can plug into a traditional scope and it is not negative. I did calibrate probe and when connected to picoscope I did the autozero...Any thoughts here?
Thanks