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ESP32 PWM!
Posted: Mon Apr 01, 2024 6:25 pm
by jgu1
HI all!
I need to control a PWM via potentiameter in anothe project. First I test it in a simple testprogram. When I simulate the program it doesn´t work, I don´t see the PWM on the Graph. I have not test in real word yet, so I don´t know if it work,
What am I do wrong, please?
Br Jorgen
Re: ESP32 PWM!
Posted: Mon Apr 01, 2024 7:02 pm
by chipfryer27
Hi Jorgen
The PWM component needs to have a PWM Timer selected and has a period overflow of 255 for 8-bit devices and 65535 for 16-bit devices which also needs to be set according to your device.
I see your slider has a range of 0-4095 so you could perhaps use the Map component to scale to 0-255 for your Duty?
Hope this helps.
Regards
Re: ESP32 PWM!
Posted: Mon Apr 01, 2024 7:42 pm
by jgu1
Hi chipfryer27
Many thank´s for your help. Yes I managed to get it work in simulation after your advice. I have compile to chip, no uotput
I use theanalog (warm ) Analog 4 = pin 32 and for the PWM out I use CH4 with pin B3 = D11
Do you have any advice?
Re: ESP32 PWM!
Posted: Mon Apr 01, 2024 8:08 pm
by chipfryer27
Hi Jorgen
I don't use the ESP32 that much but from what I see with View > Target (showing pins)
I agree that the Slider is connected to IO32 / ADC4 PortB.0 but I'm unsure where you get D11 for the PWM. Is that a typing error?
How are you measuring the output? You will need a scope or an analyser on the pin to see the duty change.
Regards
Re: ESP32 PWM!
Posted: Mon Apr 01, 2024 8:31 pm
by jgu1
Hi again!
I disvoverd that if I change the channel I saw that Pin was changing Timer A and B so I try to use Channel 1 and pin A15 then I get fine PWM out
I not managed it by any of the BPins. But anyway, by help from you I can continue my project.
I think it is tricky with pinnumbers with ESP32, no logig
Again thank´s
Br Jorgen
Re: ESP32 PWM!
Posted: Mon Apr 01, 2024 8:40 pm
by chipfryer27
Hi
I think it is tricky with pinnumbers with ESP32, no logig
It certainly seems that way
Glad you have it working now.
Regards
Re: ESP32 PWM!
Posted: Tue Aug 20, 2024 5:09 pm
by MJU20
I've downloaded the file in
https://flowcode.co.uk/forums/viewtopic ... 423#p15423 and changed the target to the ESP32C3_super-mini (compiled it using EDF5.3x).
This gives an error.
According to the schematic and specifications:
https://www.sudo.is/docs/esphome/boards ... supermini/ the GPIO's all have PWM capabilities.
But when I compile it I get this error..
Code: Select all
[3/7] Linking C static library esp-idf\main\libmain.a
[4/7] Generating ld/sections.ld
[5/7] Linking CXX executable esp-project.elf
FAILED: esp-project.elf
cmd.exe /C "cd . && C:\Espressif\tools\riscv32-esp-elf\esp-13.2.0_20240530\riscv32-esp-elf\bin\riscv32-esp-elf-g++.exe -march=rv32imc_zicsr_zifencei -nostartfiles -march=rv32imc_zicsr_zifencei --specs=nosys.specs -Wl,--cref -Wl,--defsym=IDF_TARGET_ESP32C3=0 -Wl,--Map=D:/FC10/ESP/SuperminiPWM/PWM_ESP/build/esp-project.map -Wl,--no-warn-rwx-segments -fno-rtti -fno-lto -Wl,--gc-sections -Wl,--warn-common -T rom.api.ld -T esp32c3.peripherals.ld -T esp32c3.rom.ld -T esp32c3.rom.api.ld -T esp32c3.rom.libgcc.ld -T esp32c3.rom.version.ld -T esp32c3.rom.eco3.ld -T esp32c3.rom.newlib.ld -T memory.ld -T sections.ld @CMakeFiles\esp-project.elf.rsp -o esp-project.elf && cd ."
C:/Espressif/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/13.2.0/../../../../riscv32-esp-elf/bin/ld.exe: esp-idf/main/libmain.a(esp-project.c.obj): in function `FC_CAL_PWM_Enable_1':
C:\ProgramData\MatrixTSL\FlowcodeV10\CAL\ESP/ESP_CAL_PWM.c:221:(.text.FC_CAL_PWM_Enable_1+0x26): undefined reference to `mcpwm_gpio_init'
C:/Espressif/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/13.2.0/../../../../riscv32-esp-elf/bin/ld.exe: C:\ProgramData\MatrixTSL\FlowcodeV10\CAL\ESP/ESP_CAL_PWM.c:223:(.text.FC_CAL_PWM_Enable_1+0x3a): undefined reference to `mcpwm_init'
C:/Espressif/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/13.2.0/../../../../riscv32-esp-elf/bin/ld.exe: C:\ProgramData\MatrixTSL\FlowcodeV10\CAL\ESP/ESP_CAL_PWM.c:225:(.text.FC_CAL_PWM_Enable_1+0x46): undefined reference to `mcpwm_start'
C:/Espressif/tools/riscv32-esp-elf/esp-13.2.0_20240530/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/13.2.0/../../../../riscv32-esp-elf/bin/ld.exe: esp-idf/main/libmain.a(esp-project.c.obj): in function `FC_CAL_PWM_SetDuty8Bit_1':
C:\ProgramData\MatrixTSL\FlowcodeV10\CAL\ESP/ESP_CAL_PWM.c:268:(.text.FC_CAL_PWM_SetDuty8Bit_1+0x40): undefined reference to `mcpwm_set_duty'
collect2.exe: error: ld returned 1 exit status
ninja: build stopped: subcommand failed.
ninja failed with exit code 1
Executing action: all (aliases: build)
Running ninja in directory D:\FC10\ESP\SuperminiPWM\PWM_ESP\build
Executing "ninja all"...
Build Failed
Autoclose turned off
What am I doing wrong? Use the wrong pin? Need to choose another pint in the PWM settings?
This example uses the PWM channel 1 component, I don't find that in my component library.
How can I make pin 9 (or any other pin), work as a PWM signal?
At this moment the board is flashing a LED on pin 9 so I know it works and compiles..
Re: ESP32 PWM!
Posted: Wed Aug 28, 2024 5:14 pm
by MJU20
Bump
Re: ESP32 PWM!
Posted: Wed Aug 28, 2024 5:54 pm
by BenR
Hello,
Thanks for letting us know. I'll upgrade my IPE to v5.3 and see if I can solve the problem for you. Likely the PWM API has changed slightly in the latest version of the IPE.
Re: ESP32 PWM!
Posted: Sun Sep 15, 2024 5:09 pm
by MJU20
Bump...
Any news on this yet?