Merge pull request #391 from kasjer/kasjer/stm32l476disco-clock-configuration

stm32l476disco clock configuration

1 files changed, 6 insertions, 1 deletions

diff --git a/hw/bsp/stm32l476disco/stm32l476disco.c b/hw/bsp/stm32l476disco/stm32l476disco.c
index 2d4a4e3de..b18846685 100644
--- a/hw/bsp/stm32l476disco/stm32l476disco.c
+++ b/hw/bsp/stm32l476disco/stm32l476disco.c
@@ -86,14 +86,19 @@ static void SystemClock_Config(void)
   RCC_OscInitTypeDef RCC_OscInitStruct;
   RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
 
-  /* Enable the LSE Oscilator */
+  /* Enable the LSE Oscillator */
   RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
   RCC_OscInitStruct.LSEState = RCC_LSE_ON;
+  RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
   HAL_RCC_OscConfig(&RCC_OscInitStruct);
 
   /* Enable the CSS interrupt in case LSE signal is corrupted or not present */
   HAL_RCCEx_DisableLSECSS();
 
+  /* Set tick interrupt priority, default HAL value is intentionally invalid
+     and that prevents PLL initialization in HAL_RCC_OscConfig() */
+  HAL_InitTick((1UL << __NVIC_PRIO_BITS) - 1UL);
+
   /* Enable MSI Oscillator and activate PLL with MSI as source */
   RCC_OscInitStruct.OscillatorType      = RCC_OSCILLATORTYPE_MSI;
   RCC_OscInitStruct.MSIState            = RCC_MSI_ON;