Diff: SysClockConf.cpp

Revision:

0:0ced269d2669

Child:

1:7b9d53d8e473

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/SysClockConf.cpp	Sun Jul 17 08:44:20 2016 +0000
@@ -0,0 +1,96 @@
+/*
+  ******************************************************************************
+  * @file    SysClockConf.c
+  * @author  Zoltan Hudak
+  * @version 
+  * @date    05-July-2016
+  * @brief   System Clock configuration for STM32F103C8T6
+  ******************************************************************************
+  * @attention
+  *
+  * <h2><center>&copy; COPYRIGHT(c) 2016 Zoltan Hudak <hudakz@inbox.com>
+  *
+  * All rights reserved.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation, either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program.  If not, see <http://www.gnu.org/licenses/>.
+  */
+
+#include "SysClockConf.h"
+#include "mbed.h"
+
+bool HSE_SystemClock_Config(int freq) {
+    RCC_OscInitTypeDef RCC_OscInitStruct;
+
+    RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
+    RCC_OscInitStruct.HSEState = RCC_HSE_ON;
+    RCC_OscInitStruct.HSEPredivValue = RCC_HSE_PREDIV_DIV1;
+    RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
+    RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
+    switch(freq) {
+    case 36:
+        RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
+        break;
+    case 48:
+        RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL6;
+        break;
+    default:
+        RCC_OscInitStruct.PLL.PLLMUL = RCC_PLL_MUL9;
+    }
+
+    if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
+        return false;
+    }
+
+    RCC_ClkInitTypeDef RCC_ClkInitStruct;
+
+    RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
+                                |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;
+    if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK) {
+        return false;
+    }
+
+    RCC_PeriphCLKInitTypeDef PeriphClkInit;
+
+    PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_ADC|RCC_PERIPHCLK_USB;
+    switch(freq) {
+    case 36:
+        PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
+        break;
+    case 48:
+        PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV4;
+        break;
+    default:
+        PeriphClkInit.AdcClockSelection = RCC_ADCPCLK2_DIV6;
+    }
+    PeriphClkInit.UsbClockSelection = RCC_USBPLLCLK_DIV1;
+    if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
+        return false;
+    }
+    return true;
+}
+
+bool confSysClock(int freq) {
+    HAL_RCC_DeInit();
+    if (!HSE_SystemClock_Config(freq)) {
+        return false;
+    }
+    SystemCoreClockUpdate();
+    return true;
+}
+
+