Search found 1655 matches
- Fri Jun 03, 2022 9:11 am
- Forum: General discussion
- Topic: STM32F103C8T6 Reference Voltage READ
- Replies: 15
- Views: 4752
Re: STM32F103C8T6 Reference Voltage READ
your formula looks right, the adc won't get the full 3.3v at the top in part due to the various electronics (e.g. transistors in there) being a little less than 3.3v looks normal. As things I do normally won't need very high precision or accuracy, i'd make do other ways you could verify things is to...
- Fri Jun 03, 2022 7:31 am
- Forum: General discussion
- Topic: STM32F103C8T6 Reference Voltage READ
- Replies: 15
- Views: 4752
Re: STM32F103C8T6 Reference Voltage READ
Vrefint is in the data sheet https://www.st.com/en/microcontrollers-microprocessors/stm32f103c8.html 5.3.4 Embedded reference voltage VREFINT min 1.16, typ 1.2 max 1.24 v that is the adc reading you get for 1.2v so assuming a linear range, and that the top is vdd 3.3v by linear projection : adc read...
- Thu Jun 02, 2022 4:26 am
- Forum: General discussion
- Topic: Problem with data reception after iBus
- Replies: 8
- Views: 2530
Re: Problem with data reception after iBus
Serial monitor is normally Serial.println("hello world"); you can replace that with anything you want to print, so you could print anything to have it sent back to your serial monitor to look at I'd suggest copy that library into the project folder both the include and cpp file, then put t...
- Thu Jun 02, 2022 4:19 am
- Forum: General discussion
- Topic: STM32F103C8T6 Reference Voltage READ
- Replies: 15
- Views: 4752
Re: STM32F103C8T6 Reference Voltage READ
google search for RM0008 stm32f103 you should get this https://www.st.com/resource/en/reference_manual/cd00171190-stm32f101xx-stm32f102xx-stm32f103xx-stm32f105xx-and-stm32f107xx-advanced-arm-based-32-bit-mcus-stmicroelectronics.pdf look in the chapter for ADC, look under temperature sensor section i...
- Wed Jun 01, 2022 2:21 pm
- Forum: General discussion
- Topic: Problem with data reception after iBus
- Replies: 8
- Views: 2530
Re: Problem with data reception after iBus
if you can output to the serial monitor I'd suggest patch Serial.print() statements in the code, to see what is happening there are some things that is a little curious https://github.com/bmellink/IBusBM/blob/master/src/IBusBM.cpp#L84 #if defined(_VARIANT_ARDUINO_STM32_) void IBusBM::begin(HardwareS...
- Tue May 31, 2022 8:42 am
- Forum: General discussion
- Topic: STM32F103C8T6 Reference Voltage READ
- Replies: 15
- Views: 4752
Re: STM32F103C8T6 Reference Voltage READ
check the core you used. it may help to have #include <Arduino.h> in there, normally not needed.
- Tue May 31, 2022 8:14 am
- Forum: General discussion
- Topic: STM32F103C8T6 Reference Voltage READ
- Replies: 15
- Views: 4752
Re: STM32F103C8T6 Reference Voltage READ
that should work for 'official' core, e.g.
on datasheet, section 5.3.4 Embedded reference voltage
https://www.st.com/resource/en/datashee ... f103c8.pdf
that is the adc value you get for the internal voltage 1.2v
Code: Select all
uint16_t value = analogRead(AVREF);
https://www.st.com/resource/en/datashee ... f103c8.pdf
that is the adc value you get for the internal voltage 1.2v
- Tue May 31, 2022 7:52 am
- Forum: General discussion
- Topic: STM32F103C8T6 Reference Voltage READ
- Replies: 15
- Views: 4752
Re: STM32F103C8T6 Reference Voltage READ
stm32(f103) do not use a 'reference voltage' as like the Atmega. the top of the range is 3.3v VDD, bottom is 0v GND if you want to read the internal AVREF in stm32f103 you could try using these https://github.com/stm32duino/wiki/wiki/API#adc-internal-channels look up the specs sheet for what that is...
- Mon May 30, 2022 8:11 am
- Forum: General discussion
- Topic: Linux serial_posix vs. Windows serial_w32
- Replies: 37
- Views: 6810
Re: Linux serial_posix vs. Windows serial_w32
i looked at some codes https://github.com/fsagbuya/variant-acsip/blob/main/ACSIP_S76S/variant.cpp it seemed you are using HSI? i.e. internal on chip oscillator can you try using one of the generic variants? choose one of those boards e.g. Generic L072RBTx or Generic L072RZTx I'm guessing they may wo...
- Mon May 30, 2022 6:48 am
- Forum: General discussion
- Topic: Linux serial_posix vs. Windows serial_w32
- Replies: 37
- Views: 6810
Re: Linux serial_posix vs. Windows serial_w32
While you make the variant there are quite a few dependencies I'd suggest take a look at how others did it with the custom boards here is an entry in boards.txt for Piconomix PX-HER0 board https://github.com/stm32duino/Arduino_Core_STM32/blob/main/boards.txt#L4184 their specific variant files are fo...