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feat(ledc): max resolution review #11226

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@SuGlider SuGlider commented Apr 7, 2025

Description of Change

LEDC says that maximum duty value is 2^resolution_bits
Arduino analogWrite() says taht the maximum duty is (2^resolution_bits) - 1
Example for 8 bits resolution, LEDC max duty is 256 and Arduino analogWrite() is 255.

This PR changes the code to reflec exactly that.
When using LEDC functions, it will allow max duty to go to 2^resolution_bits.
When using Arduino API analogWrite(), it will map duty (2^resolution_bits) - 1 to maximum value in LEDC before calling its function.

By this way both are compatible to its own specification and allows all valid values to be used.

Tests scenarios

ESP32 and ESP32C6 using digital Logic Analyzer.

Related links

Fix #11049

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github-actions bot commented Apr 7, 2025

Test Results

 76 files   76 suites   12m 43s ⏱️
 38 tests  38 ✅ 0 💤 0 ❌
241 runs  241 ✅ 0 💤 0 ❌

Results for commit cdd04b1.

♻️ This comment has been updated with latest results.

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github-actions bot commented Apr 7, 2025

Memory usage test (comparing PR against master branch)

The table below shows the summary of memory usage change (decrease - increase) in bytes and percentage for each target.

MemoryFLASH [bytes]FLASH [%]RAM [bytes]RAM [%]
TargetDECINCDECINCDECINCDECINC
ESP32P4💚 -1200.000.00000.000.00
ESP32S3💚 -20⚠️ +28💚 -0.010.00000.000.00
ESP32S2💚 -20⚠️ +28💚 -0.010.00000.000.00
ESP32C3💚 -12⚠️ +320.000.00000.000.00
ESP32C6💚 -12⚠️ +320.000.00000.000.00
ESP32H2💚 -1200.000.00000.000.00
ESP32💚 -24⚠️ +24💚 -0.010.00000.000.00
Click to expand the detailed deltas report [usage change in BYTES]
TargetESP32P4ESP32S3ESP32S2ESP32C3ESP32C6ESP32H2ESP32
ExampleFLASHRAMFLASHRAMFLASHRAMFLASHRAMFLASHRAMFLASHRAMFLASHRAM
ArduinoOTA/examples/BasicOTA0000000000--00
AsyncUDP/examples/AsyncUDPClient0000000000--00
AsyncUDP/examples/AsyncUDPMulticastServer0000000000--00
AsyncUDP/examples/AsyncUDPServer0000000000--00
DNSServer/examples/CaptivePortal0000000000--00
EEPROM/examples/eeprom_class00000000000000
EEPROM/examples/eeprom_extra00000000000000
EEPROM/examples/eeprom_write00000000000000
ESP32/examples/AnalogOut/LEDCFade💚 -120💚 -200💚 -200💚 -120💚 -120💚 -120💚 -240
ESP32/examples/AnalogOut/LEDCSingleChannel💚 -100💚 -40💚 -40💚 -100💚 -100💚 -10000
ESP32/examples/AnalogOut/LEDCSoftwareFade💚 -40💚 -40💚 -40💚 -40💚 -40💚 -4000
ESP32/examples/AnalogOut/SigmaDelta00000000000000
ESP32/examples/AnalogOut/ledcFrequency00⚠️ +40⚠️ +4000000000
ESP32/examples/AnalogOut/ledcWrite_RGB💚 -40💚 -40💚 -40💚 -40💚 -40💚 -4000
ESP32/examples/AnalogRead00000000000000
ESP32/examples/AnalogReadContinuous00000000000000
ESP32/examples/ArduinoStackSize00000000000000
ESP32/examples/CI/CIBoardsTest00000000000000
ESP32/examples/ChipID/GetChipID00000000000000
ESP32/examples/DeepSleep/TimerWakeUp0000000000--00
ESP32/examples/DeepSleep/TouchWakeUp000000------00
ESP32/examples/FreeRTOS/BasicMultiThreading00000000000000
ESP32/examples/FreeRTOS/Mutex00000000000000
ESP32/examples/FreeRTOS/Queue00000000000000
ESP32/examples/FreeRTOS/Semaphore00000000000000
ESP32/examples/GPIO/BlinkRGB00000000000000
ESP32/examples/GPIO/FunctionalInterrupt00000000000000
ESP32/examples/GPIO/FunctionalInterruptStruct00000000000000
ESP32/examples/GPIO/GPIOInterrupt00000000000000
ESP32/examples/HWCDC_Events0000--000000--
ESP32/examples/MacAddress/GetMacAddress00000000000000
ESP32/examples/RMT/Legacy_RMT_Driver_Compatible00000000000000
ESP32/examples/RMT/RMTCallback00000000000000
ESP32/examples/RMT/RMTLoopback00000000000000
ESP32/examples/RMT/RMTReadXJT00000000000000
ESP32/examples/RMT/RMTWrite_RGB_LED00000000000000
ESP32/examples/RMT/RMT_CPUFreq_Test00000000000000
ESP32/examples/RMT/RMT_EndOfTransmissionState00000000000000
ESP32/examples/RMT/RMT_LED_Blink00000000000000
ESP32/examples/ResetReason/ResetReason00000000000000
ESP32/examples/ResetReason/ResetReason200000000000000
ESP32/examples/Serial/BaudRateDetect_Demo00000000000000
ESP32/examples/Serial/OnReceiveError_BREAK_Demo00000000000000
ESP32/examples/Serial/OnReceive_Demo00000000000000
ESP32/examples/Serial/RS485_Echo_Demo00000000000000
ESP32/examples/Serial/RxFIFOFull_Demo00000000000000
ESP32/examples/Serial/RxTimeout_Demo00000000000000
ESP32/examples/Serial/Serial_All_CPU_Freqs00000000000000
ESP32/examples/Serial/Serial_STD_Func_OnReceive00000000000000
ESP32/examples/Serial/onReceiveExample00000000000000
ESP32/examples/TWAI/TWAIreceive00000000000000
ESP32/examples/TWAI/TWAItransmit00000000000000
ESP32/examples/Template/ExampleTemplate00000000000000
ESP32/examples/Time/SimpleTime0000000000--00
ESP32/examples/Timer/RepeatTimer00000000000000
ESP32/examples/Timer/WatchdogTimer00000000000000
ESP32/examples/Touch/TouchInterrupt000000------00
ESP32/examples/Touch/TouchRead000000------00
ESP32/examples/Utilities/HEXBuilder00000000000000
ESP32/examples/Utilities/MD5Builder00000000000000
ESP32/examples/Utilities/SHA1Builder00000000000000
ESP_I2S/examples/ES8388_loopback00000000000000
ESP_I2S/examples/Record_to_WAV0000--------00
ESP_I2S/examples/Simple_tone00000000000000
ESPmDNS/examples/mDNS-SD_Extended0000000000--00
ESPmDNS/examples/mDNS_Web_Server0000000000--00
Ethernet/examples/ETH_TLK11000----------00
Ethernet/examples/ETH_W5500_Arduino_SPI00000000000000
Ethernet/examples/ETH_W5500_IDF_SPI00000000000000
Ethernet/examples/ETH_WIFI_BRIDGE0000000000--00
FFat/examples/FFat_Test00000000000000
FFat/examples/FFat_time0000000000--00
HTTPClient/examples/Authorization0000000000--00
HTTPClient/examples/BasicHttpClient0000000000--00
HTTPClient/examples/BasicHttpsClient0000000000--00
HTTPClient/examples/ReuseConnection0000000000--00
HTTPClient/examples/StreamHttpClient0000000000--00
HTTPUpdate/examples/httpUpdate0000000000--00
HTTPUpdate/examples/httpUpdateSPIFFS0000000000--00
HTTPUpdate/examples/httpUpdateSecure0000000000--00
HTTPUpdateServer/examples/WebUpdater0000000000--00
LittleFS/examples/LITTLEFS_test00000000000000
LittleFS/examples/LITTLEFS_time0000000000--00
NetBIOS/examples/ESP_NBNST0000000000--00
NetworkClientSecure/examples/WiFiClientInsecure0000000000--00
NetworkClientSecure/examples/WiFiClientPSK0000000000--00
NetworkClientSecure/examples/WiFiClientSecure0000000000--00
NetworkClientSecure/examples/WiFiClientSecureProtocolUpgrade00💚 -160000000--00
NetworkClientSecure/examples/WiFiClientShowPeerCredentials0000000000--00
NetworkClientSecure/examples/WiFiClientTrustOnFirstUse0000000000--00
PPP/examples/PPP_Basic00000000000000
PPP/examples/PPP_WIFI_BRIDGE0000000000--00
Preferences/examples/Prefs2Struct00000000000000
Preferences/examples/StartCounter00000000000000
SD/examples/SD_Test00000000000000
SD/examples/SD_time0000000000--00
SD_MMC/examples/SD2USBMSC0000----------
SD_MMC/examples/SDMMC_Test0000--------00
SD_MMC/examples/SDMMC_time0000--------00
SPI/examples/SPI_Multiple_Buses00000000000000
SPIFFS/examples/SPIFFS_Test00000000000000
SPIFFS/examples/SPIFFS_time0000000000--00
TFLiteMicro/examples/hello_world00000000000000
Ticker/examples/Blinker00000000000000
Ticker/examples/TickerBasic00000000000000
Ticker/examples/TickerParameter00000000000000
USB/examples/CompositeDevice000000--------
USB/examples/ConsumerControl000000--------
USB/examples/CustomHIDDevice000000--------
USB/examples/FirmwareMSC000000--------
USB/examples/Gamepad000000--------
USB/examples/HIDVendor000000--------
USB/examples/Keyboard/KeyboardLogout000000--------
USB/examples/Keyboard/KeyboardMessage000000--------
USB/examples/Keyboard/KeyboardReprogram000000--------
USB/examples/Keyboard/KeyboardSerial000000--------
USB/examples/KeyboardAndMouseControl000000--------
USB/examples/MIDI/MidiController000000--------
USB/examples/MIDI/MidiInterface000000--------
USB/examples/MIDI/MidiMusicBox000000--------
USB/examples/MIDI/ReceiveMidi000000--------
USB/examples/Mouse/ButtonMouseControl000000--------
USB/examples/SystemControl000000--------
USB/examples/USBMSC000000--------
USB/examples/USBSerial000000--------
USB/examples/USBVendor000000--------
Update/examples/AWS_S3_OTA_Update0000000000--00
Update/examples/HTTPS_OTA_Update0000000000--00
Update/examples/HTTP_Client_AES_OTA_Update0000000000--00
Update/examples/HTTP_Server_AES_OTA_Update0000000000--00
Update/examples/OTAWebUpdater0000000000--00
Update/examples/SD_Update00000000000000
WebServer/examples/AdvancedWebServer0000000000--00
WebServer/examples/FSBrowser0000000000--00
WebServer/examples/Filters0000000000--00
WebServer/examples/HelloServer0000000000--00
WebServer/examples/HttpAdvancedAuth0000000000--00
WebServer/examples/HttpAuthCallback0000000000--00
WebServer/examples/HttpAuthCallbackInline0000000000--00
WebServer/examples/HttpBasicAuth0000000000--00
WebServer/examples/HttpBasicAuthSHA10000000000--00
WebServer/examples/HttpBasicAuthSHA1orBearerToken0000000000--00
WebServer/examples/MultiHomedServers0000000000--00
WebServer/examples/PathArgServer0000000000--00
WebServer/examples/SDWebServer0000000000--00
WebServer/examples/SimpleAuthentification0000000000--00
WebServer/examples/UploadHugeFile0000000000--00
WebServer/examples/WebServer0000000000--00
WebServer/examples/WebUpdate0000000000--00
WiFi/examples/FTM/FTM_Initiator0000000000--00
WiFi/examples/FTM/FTM_Responder0000000000--00
WiFi/examples/SimpleWiFiServer0000000000--00
WiFi/examples/WiFiAccessPoint0000000000--00
WiFi/examples/WiFiClient00💚 -160000000--00
WiFi/examples/WiFiClientBasic0000000000--00
WiFi/examples/WiFiClientConnect0000000000--00
WiFi/examples/WiFiClientEvents0000000000--00
WiFi/examples/WiFiClientStaticIP0000000000--00
WiFi/examples/WiFiExtender0000000000--00
WiFi/examples/WiFiIPv60000000000--00
WiFi/examples/WiFiMulti0000000000--00
WiFi/examples/WiFiMultiAdvanced0000000000--00
WiFi/examples/WiFiScan0000000000--00
WiFi/examples/WiFiScanAsync0000000000--00
WiFi/examples/WiFiScanDualAntenna0000000000--00
WiFi/examples/WiFiScanTime0000000000--00
WiFi/examples/WiFiTelnetToSerial0000000000--00
WiFi/examples/WiFiUDPClient0000000000--⚠️ +160
Wire/examples/WireMaster00000000000000
Wire/examples/WireScan00000000000000
Wire/examples/WireSlave00000000000000
BLE/examples/BLE5_extended_scan--00--000000--
BLE/examples/BLE5_multi_advertising--00--000000--
BLE/examples/BLE5_periodic_advertising--00--000000--
BLE/examples/BLE5_periodic_sync--00--000000--
BLE/examples/Beacon_Scanner--00--00000000
BLE/examples/Client--00--00000000
BLE/examples/EddystoneTLM_Beacon--00--00000000
BLE/examples/EddystoneURL_Beacon--00--00000000
BLE/examples/Notify--00--00000000
BLE/examples/Scan--00--00000000
BLE/examples/Server--00--00000000
BLE/examples/Server_multiconnect--00--00000000
BLE/examples/UART--00--00000000
BLE/examples/Write--00--00000000
BLE/examples/iBeacon--00--00000000
ESP32/examples/Camera/CameraWebServer (1)--00💚 -40------00
ESP32/examples/Camera/CameraWebServer (2)--💚 -40💚 -40------00
ESP32/examples/Camera/CameraWebServer (3)--💚 -40----------
ESP32/examples/DeepSleep/ExternalWakeUp--0000------00
ESP_NOW/examples/ESP_NOW_Broadcast_Master--00000000--00
ESP_NOW/examples/ESP_NOW_Broadcast_Slave--00000000--00
ESP_NOW/examples/ESP_NOW_Network--00000000--00
ESP_NOW/examples/ESP_NOW_Serial--00000000--00
ESP_SR/examples/Basic--00----------
HTTPClient/examples/HTTPClientEnterprise--00000000--00
Insights/examples/DiagnosticsSmokeTest--00000000--00
Insights/examples/MinimalDiagnostics--00000000--00
Matter/examples/MatterColorLight--00000000--⚠️ +240
Matter/examples/MatterCommissionTest--00000000--00
Matter/examples/MatterComposedLights--00000000--00
Matter/examples/MatterContactSensor--00000000--00
Matter/examples/MatterDimmableLight--00000000--⚠️ +160
Matter/examples/MatterEnhancedColorLight--00000000--⚠️ +240
Matter/examples/MatterFan--00000000--⚠️ +240
Matter/examples/MatterHumiditySensor--00000000--00
Matter/examples/MatterMinimum--00000000--00
Matter/examples/MatterOccupancySensor--00000000--00
Matter/examples/MatterOnIdentify--00000000--00
Matter/examples/MatterOnOffLight--00000000--00
Matter/examples/MatterOnOffPlugin--00000000--00
Matter/examples/MatterPressureSensor--00000000--00
Matter/examples/MatterSmartButon--00000000--00
Matter/examples/MatterTemperatureLight--00000000--⚠️ +240
Matter/examples/MatterTemperatureSensor--00000000--00
Matter/examples/MatterThermostat--00000000--00
Matter/examples/WiFiProvWithinMatter--00000000--00
NetworkClientSecure/examples/WiFiClientSecureEnterprise--00000000--00
RainMaker/examples/RMakerCustom--00000000----
RainMaker/examples/RMakerCustomAirCooler--⚠️ +280⚠️ +280⚠️ +320⚠️ +320----
RainMaker/examples/RMakerSonoffDualR3--00000000----
RainMaker/examples/RMakerSwitch--00000000----
SimpleBLE/examples/SimpleBleDevice--00--00000000
WebServer/examples/Middleware--00000000--00
WiFi/examples/WPS--00000000--00
WiFi/examples/WiFiBlueToothSwitch--00--0000--00
WiFi/examples/WiFiClientEnterprise--00000000--00
WiFi/examples/WiFiSmartConfig--⚠️ +160000000--00
WiFiProv/examples/WiFiProv--00000000--00
Zigbee/examples/Zigbee_Color_Dimmer_Switch--000000000000
Zigbee/examples/Zigbee_Gateway--000000----00
Zigbee/examples/Zigbee_On_Off_Switch--000000000000
Zigbee/examples/Zigbee_Range_Extender--000000000000
Zigbee/examples/Zigbee_Thermostat--000000000000
OpenThread/examples/COAP/coap_lamp--------0000--
OpenThread/examples/COAP/coap_switch--------0000--
OpenThread/examples/SimpleCLI--------0000--
OpenThread/examples/SimpleNode--------0000--
OpenThread/examples/SimpleThreadNetwork/ExtendedRouterNode--------0000--
OpenThread/examples/SimpleThreadNetwork/LeaderNode--------0000--
OpenThread/examples/SimpleThreadNetwork/RouterNode--------0000--
OpenThread/examples/ThreadScan--------0000--
OpenThread/examples/onReceive--------0000--
Zigbee/examples/Zigbee_Analog_Input_Output--------0000--
Zigbee/examples/Zigbee_CarbonDioxide_Sensor--------0000--
Zigbee/examples/Zigbee_Color_Dimmable_Light--------0000--
Zigbee/examples/Zigbee_Contact_Switch--------0000--
Zigbee/examples/Zigbee_Dimmable_Light--------0000--
Zigbee/examples/Zigbee_Illuminance_Sensor--------0000--
Zigbee/examples/Zigbee_OTA_Client--------0000--
Zigbee/examples/Zigbee_Occupancy_Sensor--------0000--
Zigbee/examples/Zigbee_On_Off_Light--------0000--
Zigbee/examples/Zigbee_PM25_Sensor--------0000--
Zigbee/examples/Zigbee_Pressure_Flow_Sensor--------0000--
Zigbee/examples/Zigbee_Scan_Networks--------0000--
Zigbee/examples/Zigbee_Temp_Hum_Sensor_Sleepy--------0000--
Zigbee/examples/Zigbee_Temperature_Sensor--------0000--
Zigbee/examples/Zigbee_Vibration_Sensor--------0000--
Zigbee/examples/Zigbee_Wind_Speed_Sensor--------0000--
Zigbee/examples/Zigbee_Window_Covering--------0000--
BluetoothSerial/examples/DiscoverConnect------------00
BluetoothSerial/examples/GetLocalMAC------------00
BluetoothSerial/examples/SerialToSerialBT------------00
BluetoothSerial/examples/SerialToSerialBTM------------00
BluetoothSerial/examples/SerialToSerialBT_Legacy------------00
BluetoothSerial/examples/SerialToSerialBT_SSP------------00
BluetoothSerial/examples/bt_classic_device_discovery------------00
BluetoothSerial/examples/bt_remove_paired_devices------------00
ESP32/examples/DeepSleep/SmoothBlink_ULP_Code------------00
Ethernet/examples/ETH_LAN8720------------00

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ledc_write max_duty bug
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