Portenta H7 - Clock configuration

[mmirabel]

Hello everyone,
I'm writing to get more details about the configuration of the 480MHz clock for the Portenta H7.

extern uint8_t SetSysClock_PLL_HSI(void);
uint8_t SetSysClock_Value;

void setup() {
    #ifdef CORE_CM7
    Serial.begin(115200);
    while (!Serial);
    Serial.println("Core M7 Neptune VLC Board");
  
    SetSysClock_Value=SetSysClock_PLL_HSI();
    
    if (SetSysClock_Value == 0) {
        Serial.println("Error: SetSysClock_PLL_HSI");
    } else {
        Serial.println("SetSysClock_PLL_HSI OK");
    }
    Serial.println("Core M7 Neptune VLC Board 2");
    // Codice per riattivare il core M4
    RCC->GCR |= (1<<3);
    #endif
}

This is my setup(). I try to use system_clock_override.c but SetSysClock_PLL_HSE not work correctly and my code not print SetSysClock_PLL_HSI OK.
I've followed other discussions on the forum but I can't get my project to work.

How to set up the Portenta with 480MHz Clock (at least more than 4MHz)

Hi everyone, i would like to use the 480MHz (at least more than 4MHz) System Clock of the STM32H747XI that is the core of the Portenta H7. In normal (Arduino) Setup it just uses the 4MHz Clock. So i used CubeMX to generate a Setup Code. In there i select the HSI as the PLL Source in the PLL Source MUX (64MHz) divided by 4 (because it wants to have max 16MHz at this point) multiplied by 60 => 960MHz at this point. And than devided by 2 (because 2 is the least division in DIVP1) => 480MHz. At …

system_clock_override.c (11,1 KB)

You're welcome!