topic I receive the correct temperature from one LM35, while receive a constant number from the other one in LPC Microcontrollers

I receive the correct temperature from one LM35, while receive a constant number from the other one

Alex_2221 — Thu, 13 May 2021 19:46:15 GMT

Hello everyone, I'm using adcs of LPC1768 to read 2 temperatures of two LM35 sensors. I receive the correct temperature from one of the sensors, but keep receiving a constant number like 151 from the other one. My code used to work fine before, but I had to reprogram my board with another computer and all of a sudden this problem showed up. I added the C files of keil. I was wondering if you you'd mind helping me resolve this issue

Thanks in advance

Re: I receive the correct temperature from one LM35, while receive a constant number from the other

Alex_2221 — Fri, 14 May 2021 18:30:05 GMT

@xiangjun_rong What do you think about this? Last time you helped me with this code and it worked

Re: I receive the correct temperature from one LM35, while receive a constant number from the other

FelipeGarcia — Mon, 17 May 2021 17:01:24 GMT

Hi Alex,

If there was no modification to the code then software should not be an issue. I would check hardware connections, if sensor is appropriately connected or even testing with an external power supply instead of sensor.

If you think code maybe was modified then I recommend you to compare register configuration for each channel and see if there is any difference.

Best regards,

Felipe

Re: I receive the correct temperature from one LM35, while receive a constant number from the other

Alex_2221 — Tue, 18 May 2021 08:46:23 GMT

Thanks for the reply, yeah there was a hardware issue and I resolved it. Thank you so much