Merge pull request #2286 from hierophect/stm32-speedy-405

STM32: Raise clock speed of F405

Author: dhalbert

ports/stm32f4/peripherals/stm32f4/stm32f405xx/clocks.c

@@ -48,7 +48,7 @@ void stm32f4_peripherals_clocks_init(void) {
     RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
     RCC_OscInitStruct.PLL.PLLM = 12;
     RCC_OscInitStruct.PLL.PLLN = 336;
-    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;
+    RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;
     RCC_OscInitStruct.PLL.PLLQ = 7;
     HAL_RCC_OscConfig(&RCC_OscInitStruct);
 
@@ -57,7 +57,7 @@ void stm32f4_peripherals_clocks_init(void) {
     RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
     RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
     RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
-    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
-    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
+    RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
+    RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
     HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5);
 }