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After checking other parts of the code (trng_api.c and a few other board platforms (NUCLEO_F413ZH, ...)) it appears that even though the reset value defaults correctly it may be good practice to keep the HAL_RCCEx_PeriphCLKConfig statement that selects the HSI48CLK as source for USB/RNG.

pull/13979/head
Tauno Magnusson 2021-01-26 03:51:49 +01:00
parent 21176e903a
commit dc969ba1d9
1 changed files with 18 additions and 0 deletions
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18
targets/TARGET_STM/TARGET_STM32G4/TARGET_STM32G431xB/system_clock.c
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@ -121,6 +121,15 @@ MBED_WEAK uint8_t SetSysClock_PLL_HSE(uint8_t bypass)
return 0; // FAIL return 0; // FAIL
} }
#if defined(DEVICE_USBDEVICE)
// Connect the HSI48 Clock to drive the USB & RNG Clocks @ 48 MHz (CK48 Clock Mux)
RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
RCC_PeriphCLKInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct) != HAL_OK) {
return 0; // FAIL
}
#endif
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
@ -175,6 +184,15 @@ uint8_t SetSysClock_PLL_HSI(void)
return 0; // FAIL return 0; // FAIL
} }
#if defined(DEVICE_USBDEVICE)
// Connect the HSI48 Clock to drive the USB & RNG Clocks @ 48 MHz (CK48 Clock Mux)
RCC_PeriphCLKInitStruct.PeriphClockSelection = RCC_PERIPHCLK_USB;
RCC_PeriphCLKInitStruct.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphCLKInitStruct) != HAL_OK) {
return 0; // FAIL
}
#endif
RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_SYSCLK
| RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2; | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2;
RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;