Amir Chaudhary / Mbed 2 deprecated STM32_Register_Print

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Dependencies:   mbed

main.cpp@0:882187e7521f, 2018-12-27 (annotated)

Committer:
amirchaudhary
Date:
Thu Dec 27 18:57:19 2018 +0000
Revision:
0:882187e7521f
Successfully set the RCC->CR Register

Who changed what in which revision?

UserRevisionLine numberNew contents of line
amirchaudhary 0:882187e7521f 1 #include "mbed.h"
amirchaudhary 0:882187e7521f 2
amirchaudhary 0:882187e7521f 3 //------------------------------------
amirchaudhary 0:882187e7521f 4 // Hyperterminal configuration
amirchaudhary 0:882187e7521f 5 // 9600 bauds, 8-bit data, no parity
amirchaudhary 0:882187e7521f 6 //------------------------------------
amirchaudhary 0:882187e7521f 7
amirchaudhary 0:882187e7521f 8 Serial pc(SERIAL_TX, SERIAL_RX);
amirchaudhary 0:882187e7521f 9
amirchaudhary 0:882187e7521f 10 // DigitalOut myled(LED1);
amirchaudhary 0:882187e7521f 11 //DigitalOut myled(D8);
amirchaudhary 0:882187e7521f 12
amirchaudhary 0:882187e7521f 13 uint8_t MY_SetSysClock_PLL_HSE(uint8_t bypass)
amirchaudhary 0:882187e7521f 14 {
amirchaudhary 0:882187e7521f 15 RCC_ClkInitTypeDef RCC_ClkInitStruct;
amirchaudhary 0:882187e7521f 16 RCC_OscInitTypeDef RCC_OscInitStruct;
amirchaudhary 0:882187e7521f 17 RCC_PeriphCLKInitTypeDef RCC_PeriphClkInit;
amirchaudhary 0:882187e7521f 18
amirchaudhary 0:882187e7521f 19 /* Used to gain time after DeepSleep in case HSI is used */
amirchaudhary 0:882187e7521f 20 if (__HAL_RCC_GET_FLAG(RCC_FLAG_HSIRDY) != RESET) {
amirchaudhary 0:882187e7521f 21 return 0;
amirchaudhary 0:882187e7521f 22 }
amirchaudhary 0:882187e7521f 23
amirchaudhary 0:882187e7521f 24 /* The voltage scaling allows optimizing the power consumption when the device is
amirchaudhary 0:882187e7521f 25 clocked below the maximum system frequency, to update the voltage scaling value
amirchaudhary 0:882187e7521f 26 regarding system frequency refer to product datasheet. */
amirchaudhary 0:882187e7521f 27 __PWR_CLK_ENABLE();
amirchaudhary 0:882187e7521f 28 __HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
amirchaudhary 0:882187e7521f 29
amirchaudhary 0:882187e7521f 30 /* Enable HSE and HSI48 oscillators and activate PLL with HSE as source */
amirchaudhary 0:882187e7521f 31 RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE|RCC_OSCILLATORTYPE_HSI48;
amirchaudhary 0:882187e7521f 32 if (bypass == 0) {
amirchaudhary 0:882187e7521f 33 RCC_OscInitStruct.HSEState = RCC_HSE_ON; /* External 8 MHz xtal on OSC_IN/OSC_OUT */
amirchaudhary 0:882187e7521f 34 } else {
amirchaudhary 0:882187e7521f 35 RCC_OscInitStruct.HSEState = RCC_HSE_BYPASS; /* External 8 MHz clock on OSC_IN */
amirchaudhary 0:882187e7521f 36 }
amirchaudhary 0:882187e7521f 37 RCC_OscInitStruct.HSIState = RCC_HSI_OFF;
amirchaudhary 0:882187e7521f 38 RCC_OscInitStruct.HSI48State = RCC_HSI48_ON; /* For USB and RNG clock */
amirchaudhary 0:882187e7521f 39 // PLLCLK = (8 MHz * 8)/2 = 32 MHz
amirchaudhary 0:882187e7521f 40 RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
amirchaudhary 0:882187e7521f 41 RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
amirchaudhary 0:882187e7521f 42 RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_8;
amirchaudhary 0:882187e7521f 43 RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_2;
amirchaudhary 0:882187e7521f 44 if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK) {
amirchaudhary 0:882187e7521f 45 return 0; // FAIL
amirchaudhary 0:882187e7521f 46 }
amirchaudhary 0:882187e7521f 47
amirchaudhary 0:882187e7521f 48 /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 clocks dividers */
amirchaudhary 0:882187e7521f 49 RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);
amirchaudhary 0:882187e7521f 50 RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK; // 32 MHz
amirchaudhary 0:882187e7521f 51 RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1; // 32 MHz
amirchaudhary 0:882187e7521f 52 RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; // 32 MHz
amirchaudhary 0:882187e7521f 53 RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; // 32 MHz
amirchaudhary 0:882187e7521f 54 if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK) {
amirchaudhary 0:882187e7521f 55 return 0; // FAIL
amirchaudhary 0:882187e7521f 56 }
amirchaudhary 0:882187e7521f 57
amirchaudhary 0:882187e7521f 58 RCC_PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USB;
amirchaudhary 0:882187e7521f 59 RCC_PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_HSI48;
amirchaudhary 0:882187e7521f 60 if (HAL_RCCEx_PeriphCLKConfig(&RCC_PeriphClkInit) != HAL_OK) {
amirchaudhary 0:882187e7521f 61 return 0; // FAIL
amirchaudhary 0:882187e7521f 62 }
amirchaudhary 0:882187e7521f 63
amirchaudhary 0:882187e7521f 64 return 1; // OK
amirchaudhary 0:882187e7521f 65 }
amirchaudhary 0:882187e7521f 66
amirchaudhary 0:882187e7521f 67 int main()
amirchaudhary 0:882187e7521f 68 {
amirchaudhary 0:882187e7521f 69 // RCC->CR|= (uint32_t)0x03030300U;
amirchaudhary 0:882187e7521f 70
amirchaudhary 0:882187e7521f 71 //RCC->CR &= (uint32_t)0xFCFCFCFFU;
amirchaudhary 0:882187e7521f 72
amirchaudhary 0:882187e7521f 73 //RCC->CR |= RCC_CR_CSSHSEON | RCC_CR_HSEBYP | RCC_CR_HSEON;
amirchaudhary 0:882187e7521f 74
amirchaudhary 0:882187e7521f 75 //RCC->CR |= RCC_CR_CSSHSEON | RCC_CR_HSEON;
amirchaudhary 0:882187e7521f 76
amirchaudhary 0:882187e7521f 77 // RCC->CR &= (uint32_t)0xFEF4FFFFU;
amirchaudhary 0:882187e7521f 78 // RCC->CR |= (uint32_t)0x00000100U;
amirchaudhary 0:882187e7521f 79
amirchaudhary 0:882187e7521f 80
amirchaudhary 0:882187e7521f 81 HAL_RCC_DeInit();
amirchaudhary 0:882187e7521f 82 // RCC->CR |= RCC_CR_CSSHSEON | RCC_CR_HSEON;
amirchaudhary 0:882187e7521f 83 // while(1
amirchaudhary 0:882187e7521f 84 MY_SetSysClock_PLL_HSE(0);
amirchaudhary 0:882187e7521f 85
amirchaudhary 0:882187e7521f 86 pc.printf("\n 2SystemCoreClock of PCB= %d, %08X", SystemCoreClock, RCC->CR);
amirchaudhary 0:882187e7521f 87
amirchaudhary 0:882187e7521f 88
amirchaudhary 0:882187e7521f 89 }