arduino-esp32
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espressif
ESP32C3 undefined reference to `esp_sleep_enable_ext0_wakeup'
Board
ESP32C3 Dev Module
Device Description
ESP32C3 Dev Module
Hardware Configuration
GPIO
Version
latest master (checkout manually)
IDE Name
Arduino
Operating System
Windows 10
Flash frequency
80MHz
PSRAM enabled
no
Upload speed
921600
Description
When build the example "ExternalWakeup" , undefined reference to `esp_sleep_enable_ext0_wakeup'
Sketch
/*
Deep Sleep with External Wake Up
=====================================
This code displays how to use deep sleep with
an external trigger as a wake up source and how
to store data in RTC memory to use it over reboots
This code is under Public Domain License.
Hardware Connections
======================
Push Button to GPIO 33 pulled down with a 10K Ohm
resistor
NOTE:
======
Only RTC IO can be used as a source for external wake
source. They are pins: 0,2,4,12-15,25-27,32-39.
Author:
Pranav Cherukupalli <[email protected]>
*/
#define BUTTON_PIN_BITMASK 0x200000000 // 2^33 in hex
extern "C" esp_err_t esp_sleep_enable_ext0_wakeup(gpio_num_t gpio_num, int level);
RTC_DATA_ATTR int bootCount = 0;
/*
Method to print the reason by which ESP32
has been awaken from sleep
*/
void print_wakeup_reason(){
esp_sleep_wakeup_cause_t wakeup_reason;
wakeup_reason = esp_sleep_get_wakeup_cause();
switch(wakeup_reason)
{
case ESP_SLEEP_WAKEUP_EXT0 : Serial.println("Wakeup caused by external signal using RTC_IO"); break;
case ESP_SLEEP_WAKEUP_EXT1 : Serial.println("Wakeup caused by external signal using RTC_CNTL"); break;
case ESP_SLEEP_WAKEUP_TIMER : Serial.println("Wakeup caused by timer"); break;
case ESP_SLEEP_WAKEUP_TOUCHPAD : Serial.println("Wakeup caused by touchpad"); break;
case ESP_SLEEP_WAKEUP_ULP : Serial.println("Wakeup caused by ULP program"); break;
default : Serial.printf("Wakeup was not caused by deep sleep: %d\n",wakeup_reason); break;
}
}
void setup(){
Serial.begin(115200);
delay(1000); //Take some time to open up the Serial Monitor
//Increment boot number and print it every reboot
++bootCount;
Serial.println("Boot number: " + String(bootCount));
//Print the wakeup reason for ESP32
print_wakeup_reason();
/*
First we configure the wake up source
We set our ESP32 to wake up for an external trigger.
There are two types for ESP32, ext0 and ext1 .
ext0 uses RTC_IO to wakeup thus requires RTC peripherals
to be on while ext1 uses RTC Controller so doesnt need
peripherals to be powered on.
Note that using internal pullups/pulldowns also requires
RTC peripherals to be turned on.
*/
esp_sleep_enable_ext0_wakeup(GPIO_NUM_9,1); //1 = High, 0 = Low
//If you were to use ext1, you would use it like
//esp_sleep_enable_ext1_wakeup(BUTTON_PIN_BITMASK,ESP_EXT1_WAKEUP_ANY_HIGH);
//Go to sleep now
Serial.println("Going to sleep now");
esp_deep_sleep_start();
Serial.println("This will never be printed");
}
void loop(){
//This is not going to be called
}
Debug Message
e:/documents/arduino/hardware/arduino-esp32/arduino-esp32/tools/riscv32-esp-elf/bin/../lib/gcc/riscv32-esp-elf/8.4.0/../../../../riscv32-esp-elf/bin/ld.exe: C:\Users\Heltec\AppData\Local\Temp\arduino_build_525227\sketch\ExternalWakeUp.ino.cpp.o: in function `setup()':
C:\Users\Heltec\AppData\Local\Temp\arduino_modified_sketch_258584/ExternalWakeUp.ino:54: undefined reference to `esp_sleep_enable_ext0_wakeup'
collect2.exe: error: ld returned 1 exit status
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- [X] I confirm I have checked existing issues, online documentation and Troubleshooting guide.
If you redefine the function by calling extern "C" esp_err_t esp_sleep_enable_ext0_wakeup(gpio_num_t gpio_num, int level);, it probably isn't going to find the code. The example as included in the repo compiles.
with out "extern "C" esp_err_t esp_sleep_enable_ext0_wakeup(gpio_num_t gpio_num, int level);", It shows "ExternalWakeUp:69:3: error: 'esp_sleep_enable_ext0_wakeup' was not declared in this scope"
Ah, esp32-c3 does not support rtc wakeup. esp_deep_sleep_enable_gpio_wakeup should work:
esp_deep_sleep_enable_gpio_wakeup(1 << 9,ESP_GPIO_WAKEUP_GPIO_HIGH);
Ah, esp32-c3 does not support rtc wakeup. esp_deep_sleep_enable_gpio_wakeup should work:
esp_deep_sleep_enable_gpio_wakeup(1 << 9,ESP_GPIO_WAKEUP_GPIO_HIGH);
thanks!!
