analogWriteResolution not working #11670
Description
Related area
analogWriteResolution and analogWriteFrequency only output errors
Hardware specification
ESP Wroom32
Is your feature request related to a problem?
I Initially posted this here: pioarduino/platform-espressif32#230 (comment)
But I was told I should open an issue here.
PROBLEM DESCRIPTION
I try to setup a 10bit pwm with analogWriteResolution(LED_R, 10); but I get the following output:
[esp32-hal-ledc.c:793] analogWriteResolution(): analogWrite resolution cant be set due to selected frequency! Try to adjust frequency first
then I tried to explicitely set the frequency analogWriteFrequency(LED_R,1000);
then I get an additional message:
[esp32-hal-ledc.c:785] analogWriteFrequency(): analogWrite frequency cant be set due to selected resolution! Try to adjust resolution first
void setup() {
ledcSetClockSource(LEDC_USE_APB_CLK);
analogWriteFrequency(LED_R,1000);
analogWriteResolution(LED_R, 10);
}
I really do not understand the problem. 10bit @ 1khz requires a timerfrequency of 1Mhz which should be achievable without problems.
my platormio.ini
[env:esp32]
platform = https://github.com/pioarduino/platform-espressif32/releases/download/stable/platform-espressif32.zip
board = upesy_wroom
board_build.mcu = esp32
board_build.f_cpu = 240000000L
framework = arduino
monitor_speed = 115200
monitor_filters = esp32_exception_decoder
#build_type = debug
#upload_port = COM6
board_build.filesystem = littlefs
build_unflags = -std=gnu++11
-std=c++11
build_flags =
-std=c++17
-std=gnu++17
The (start of the) build output (used Packages)
Processing esp32 (platform: https://github.com/pioarduino/platform-espressif32/releases/download/stable/platform-espressif32.zip; board: upesy_wroom; framework: arduino)
-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Verbose mode can be enabled via `-v, --verbose` option
CONFIGURATION: https://docs.platformio.org/page/boards/espressif32/upesy_wroom.html
PLATFORM: Espressif 32 (54.3.21) > uPesy ESP32 Wroom DevKit
HARDWARE: ESP32 240MHz, 320KB RAM, 4MB Flash
DEBUG: Current (cmsis-dap) External (cmsis-dap, esp-bridge, esp-prog, iot-bus-jtag, jlink, minimodule, olimex-arm-usb-ocd, olimex-arm-usb-ocd-h, olimex-arm-usb-tiny-h, olimex-jtag-tiny, tumpa)
PACKAGES:
- framework-arduinoespressif32 @ 3.2.1
- framework-arduinoespressif32-libs @ 5.4.0+sha.858a988d6e
- tool-esptoolpy @ 5.0.0
- toolchain-xtensa-esp-elf @ 14.2.0+20241119
LDF: Library Dependency Finder -> https://bit.ly/configure-pio-ldf
LDF Modes: Finder ~ chain, Compatibility ~ soft
TO REPRODUCE
see code above
EXPECTED BEHAVIOUR
correct pwm setup
SCREENSHOTS
n.a.
ADDITIONAL CONTEXT
A sugestion was to set resolution and frequency by directly using ledcAttach. this works as expecteds - so we came to the conclusion that most probably this is a library bug.
(Please, remember to close the issue when the problem has been addressed)
Describe the solution you'd like
working arduino api functions
Describe alternatives you've considered
No response
Additional context
No response
I have checked existing list of Feature requests and the Contribution Guide
- I confirm I have checked existing list of Feature requests and Contribution Guide.