fix(Nucleo-G431KB): LPUART1 clock configuration

Old clock config prevented usage at 9600.

Signed-off-by: Frederic Pillon <frederic.pillon@st.com>

Author: fpistm

variants/STM32G4xx/G431K(6-8-B)(T-U)_G441KB(T-U)/variant_NUCLEO_G431KB.cpp

@@ -66,13 +66,15 @@ WEAK void SystemClock_Config(void)
   /* HSE is available but SB9 and SB10 OFF so not usable per default */
   RCC_OscInitTypeDef RCC_OscInitStruct = {};
   RCC_ClkInitTypeDef RCC_ClkInitStruct = {};
+  RCC_PeriphCLKInitTypeDef PeriphClkInit = {};
 
   /* Configure the main internal regulator output voltage */
   HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1_BOOST);
   /* Initializes the CPU, AHB and APB busses clocks */
-  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI;
+  RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSI | RCC_OSCILLATORTYPE_HSI48;
   RCC_OscInitStruct.HSIState = RCC_HSI_ON;
   RCC_OscInitStruct.HSICalibrationValue = RCC_HSICALIBRATION_DEFAULT;
+  RCC_OscInitStruct.HSI48State = RCC_HSI48_ON;
   RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
   RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSI;
   RCC_OscInitStruct.PLL.PLLM = RCC_PLLM_DIV4;
@@ -94,10 +96,17 @@ WEAK void SystemClock_Config(void)
   if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_8) != HAL_OK) {
     Error_Handler();
   }
+  /* Initializes the peripherals clocks */
+  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_LPUART1 | RCC_PERIPHCLK_USB;
+  PeriphClkInit.Lpuart1ClockSelection = RCC_LPUART1CLKSOURCE_HSI;
+  PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
+  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
+    Error_Handler();
+  }
 }
 
 #ifdef __cplusplus
 } // extern "C"
 #endif
 
-#endif /* ARDUINO_NUCLEO_G431KB */
+#endif /* ARDUINO_NUCLEO_G431KB */

variants/STM32G4xx/G431K(6-8-B)(T-U)_G441KB(T-U)/variant_NUCLEO_G431KB.h

@@ -126,13 +126,17 @@
 
 // UART Definitions
 #ifndef SERIAL_UART_INSTANCE
-  #define SERIAL_UART_INSTANCE  2 //Connected to ST-Link
+  #define SERIAL_UART_INSTANCE  101 //Connected to ST-Link
 #endif
 
 // Default pin used for 'Serial' instance (ex: ST-Link)
 // Mandatory for Firmata
-#define PIN_SERIAL_RX           PA3
-#define PIN_SERIAL_TX           PA2
+#ifndef PIN_SERIAL_RX
+  #define PIN_SERIAL_RX         PA3
+#endif
+#ifndef PIN_SERIAL_TX
+  #define PIN_SERIAL_TX         PA2
+#endif
 
 /* Extra HAL modules */
 #if !defined(HAL_DAC_MODULE_DISABLED)