rtc_clk_cpu_freq issue

[Ales Krapez]

Hi.
I have an issue with uploading sketch.

‘rtc_clk_cpu_freq_set’ was not declared in this scope

Is there any solution?
Thank you

[Koray Tuncer]

Yes same problem:
Board ESP-Wroom-32
I try the sketch temparature sensor only.

rtc_clk_cpu_freq_set’ was not declared in this scope

Need an urgent solution if possible.
Sincerely,

[Ales Krapez]

I noticed that the problem is in “slowDownCpu” in Sketch 3.1 this code did not exist and these versions work (at least for me)

[code]
void setup() {
Serial.begin(115200);
slowDownCpu();
pinMode(ONBOARD_LED_PIN, OUTPUT);

pinMode(RELAY_PIN, OUTPUT);

dht.setup(DHT_PIN, DHT_TYPE);

setUpWifi();

lastReceivedRelayCommandMilis = millis();

}

void slowDownCpu() {
rtc_clk_cpu_freq_set(RTC_CPU_FREQ_160M);
uart_tx_wait_idle(0);
int clockspeed = rtc_clk_cpu_freq_get();

char* clockSpeeds[5] = {“XTAL”, “80Mhz”, “160Mhz”, “240Mhz”, “2Mhz”};
Serial.print(“Setting CPU freq to: “);
Serial.println(clockSpeeds[clockspeed]);
Serial.println(“”);
}

[/code]

If you isolate this code in version 3.4, everything works

[Koray Tuncer]

I think it is not the right solution, but i disabled some codes with //

[code]
void setup() {

Serial.begin(115200);
//slowDownCpu();
pinMode(ONBOARD_LED_PIN, OUTPUT);

dht.setup(DHT_PIN, DHT_TYPE);
setUpWifi();
}

//void slowDownCpu() {
//rtc_clk_cpu_freq_set(RTC_CPU_FREQ_160M);
//uart_tx_wait_idle(0);
//int clockspeed = rtc_clk_cpu_freq_get();

//char* clockSpeeds[5] = {“XTAL”, “80Mhz”, “160Mhz”, “240Mhz”, “2Mhz”};
//Serial.print(“Setting CPU freq to: “);
//Serial.println(clockSpeeds[clockspeed]);
//Serial.println(“”);
//}
[/code]

It worked.
Does anyone know the right solution?

[admin]

Hi there!

I would not say, that it is not the right solution. It seems that the board you are using is not exactly the same as the board I used to develop the project, and it behaves differently when it comes to modifying the CPU frequency.

The ‘slowDownCpu’ function is used to slightly slow down the CPU and save energy, as it’s not at all necessary to run at the maximum speed the ESP board can offer. Removing this function will only result in your ESP board consuming a bit more energy, but it will likely be negligible.

Regards!

[Koray Tuncer]

Dear Admin,
Thank You for your reply.
Whats is your ESP32 board model exactly?
Sincerely,

[Ales Krapez]

Now I pasted another code for CPU speed (and it works). I hope the admin won’t be offended.

[code]
#include “esp32-hal-cpu.h”

void setup(void)
{
Serial.begin(115200);

setCpuFrequencyMhz(80); //Set CPU clock from 80MHz to 240MHz for example
Serial.println();
Serial.print(“CPU Frequency is: “);
Serial.print(getCpuFrequencyMhz()); //Get CPU clock
Serial.print(” Mhz”);
Serial.println();
}

[/code]

Please can you look into why the code in the previous post is not working.
Thank you

[Radian Voiculescu]

Solved the above problem by installing a older version of ESP32 in Board Manager (v 1.0.4)

[Author]

Posts