/*
* Power saving mode, mcu runs significantly cooler
* Sysclock 240 Mhz, bus clocks 120 Mhz
*/
void SysClkHalfSpeed();
/*
* Full speed - sysclk from PLL1 P - 480 Mhz
* Sysclock 480 Mhz, bus clocks 240 Mhz
*/
void SysClkFullSpeed();
and in variant_WeActMiniH7xx.cpp
/*
* Power saving mode, mcu runs significantly cooler
* Sysclock 240 Mhz, bus clocks 120 Mhz
*/
void SysClkHalfSpeed()
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = { };
/** Initializes the CPU, AHB and APB buses clocks */
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2 | RCC_CLOCKTYPE_D3PCLK1
| RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV2;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
Error_Handler();
} else {
SystemCoreClockUpdate();
}
}
/*
* Full speed - sysclk from PLL1 P - 480 Mhz
* Sysclock 480 Mhz, bus clocks 240 Mhz
*/
void SysClkFullSpeed()
{
RCC_ClkInitTypeDef RCC_ClkInitStruct = { };
/** Initializes the CPU, AHB and APB buses clocks */
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2 | RCC_CLOCKTYPE_D3PCLK1
| RCC_CLOCKTYPE_D1PCLK1;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
RCC_ClkInitStruct.SYSCLKDivider = RCC_SYSCLK_DIV1;
RCC_ClkInitStruct.AHBCLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB3CLKDivider = RCC_APB3_DIV2;
RCC_ClkInitStruct.APB1CLKDivider = RCC_APB1_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_APB2_DIV2;
RCC_ClkInitStruct.APB4CLKDivider = RCC_APB4_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK) {
Error_Handler();
} else {
SystemCoreClockUpdate();
}
}
It looks it is prepared for full/ half speed clock. The question is: How to switch it to half clock speed?
EDIT.
OK, I added
SysClkHalfSpeed();
to setup and it works
