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/*
* File : board.c
* This file is part of RT-Thread RTOS
* COPYRIGHT (C) 2009, RT-Thread Development Team
*
* The license and distribution terms for this file may be
* found in the file LICENSE in this distribution or at
* http://www.rt-thread.org/license/LICENSE
*
* Change Logs:
* Date Author Notes
* 2009-09-22 Bernard add board.h to this bsp
* 2017-12-29 ZYH Correctly generate the 48M clock
*/
#include <rtthread.h>
#include "board.h"
/**
* @addtogroup STM32
*/
/*@{*/
#ifdef RT_USING_HSI
#error Can not using HSI on this bsp
#endif
#if defined(RCC_PERIPHCLK_SDIO) || defined(RCC_PERIPHCLK_CEC) || defined(RCC_PERIPHCLK_LTDC)\
|| defined(RCC_PERIPHCLK_SPDIFRX) || defined(RCC_PERIPHCLK_FMPI2C1) || defined(RCC_PERIPHCLK_LPTIM1)
#warning Please give priority to the correctness of the clock tree when the peripherals are abnormal
#endif
static void SystemClock_Config(void)
{
rt_uint32_t hse_clk,sys_clk;
#if (RT_HSE_VALVE % 1000000 != 0)
#error HSE must be integer of MHz
#endif
hse_clk = HSE_VALUE/1000000UL;
sys_clk = HCLK_VALUE/1000000UL;
RCC_OscInitTypeDef RCC_OscInitStruct;
RCC_ClkInitTypeDef RCC_ClkInitStruct;
#if defined(RT_USING_RTC) || defined(RCC_PERIPHCLK_CLK48)
RCC_PeriphCLKInitTypeDef PeriphClkInitStruct;
#endif
/**Configure the main internal regulator output voltage
*/
__HAL_RCC_PWR_CLK_ENABLE();
__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);
/**Initializes the CPU, AHB and APB busses clocks
*/
RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
#ifdef RT_USING_RTC
RCC_OscInitStruct.OscillatorType |= RCC_OSCILLATORTYPE_LSI;
RCC_OscInitStruct.LSIState = RCC_LSI_ON;
#endif
RCC_OscInitStruct.HSEState = RCC_HSE_ON;
RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
if(hse_clk % 2 == 0)
{
RCC_OscInitStruct.PLL.PLLM = hse_clk/2;//Get 2M clock
if((sys_clk * 2) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk;//Get 2*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;//Get HCLK_VALUE
}
else if((sys_clk * 4) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk * 2;//Get 4*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;//Get HCLK_VALUE
}
else if((sys_clk * 6) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk * 3;//Get 6*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV6;//Get HCLK_VALUE
}
else if((sys_clk * 8) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk * 4;//Get 8*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8;//Get HCLK_VALUE
}
}
else
{
RCC_OscInitStruct.PLL.PLLM = hse_clk;//Get 1M clock
if((sys_clk * 2) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk * 2;//Get 2*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV2;//Get HCLK_VALUE
}
else if((sys_clk * 4) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk * 4;//Get 4*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV4;//Get HCLK_VALUE
}
else if((sys_clk * 6) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk * 6;//Get 6*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV6;//Get HCLK_VALUE
}
else if((sys_clk * 8) % 48 == 0)
{
RCC_OscInitStruct.PLL.PLLN = sys_clk * 8;//Get 8*HCLK_VALUE
RCC_OscInitStruct.PLL.PLLP = RCC_PLLP_DIV8;//Get HCLK_VALUE
}
}
RCC_OscInitStruct.PLL.PLLQ = hse_clk / RCC_OscInitStruct.PLL.PLLM * RCC_OscInitStruct.PLL.PLLN/48;//Get 48M Clock
if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
{
while(1)
{}
}
/**Initializes the CPU, AHB and APB busses clocks
*/
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;
#if (RT_HSE_HCLK <= 42000000UL)
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
{
while(1)
{}
}
#elif (RT_HSE_HCLK <= 84000000UL)
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV2;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_2) != HAL_OK)
{
while(1)
{}
}
#elif (RT_HSE_HCLK <= 168000000UL)
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV4;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV2;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_5) != HAL_OK)
{
while(1)
{}
}
#else
RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV8;
RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV4;
if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_7) != HAL_OK)
{
while(1)
{}
}
#endif
#if defined(RT_USING_RTC) || defined(RCC_PERIPHCLK_CLK48)
PeriphClkInitStruct.PeriphClockSelection = 0;
#ifdef RT_USING_RTC
PeriphClkInitStruct.PeriphClockSelection |= RCC_PERIPHCLK_RTC;
PeriphClkInitStruct.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
#endif
#ifdef RCC_PERIPHCLK_CLK48
PeriphClkInitStruct.PeriphClockSelection |= RCC_PERIPHCLK_CLK48;
PeriphClkInitStruct.Clk48ClockSelection = RCC_CLK48CLKSOURCE_PLLQ;
#endif
if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInitStruct) != HAL_OK)
{
while(1)
{}
}
#endif
}
/**
* This is the timer interrupt service routine.
*
*/
void SysTick_Handler(void)
{
/* enter interrupt */
rt_interrupt_enter();
/* tick for HAL Library */
HAL_IncTick();
rt_tick_increase();
/* leave interrupt */
rt_interrupt_leave();
}
/* re-implementat tick interface for STM32 HAL */
HAL_StatusTypeDef HAL_InitTick(uint32_t TickPriority)
{
/*Configure the SysTick to have interrupt in 1ms time basis*/
HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq() / RT_TICK_PER_SECOND);
/*Configure the SysTick IRQ priority */
HAL_NVIC_SetPriority(SysTick_IRQn, TickPriority , 0);
/* Return function status */
return HAL_OK;
}
void HAL_Delay(__IO uint32_t Delay)
{
rt_thread_delay(Delay);
}
void HAL_SuspendTick(void)
{
/* we should not suspend tick */
}
void HAL_ResumeTick(void)
{
/* we should not resume tick */
}
void HAL_MspInit(void)
{
HAL_NVIC_SetPriorityGrouping(NVIC_PRIORITYGROUP_4);
/* System interrupt init*/
/* MemoryManagement_IRQn interrupt configuration */
HAL_NVIC_SetPriority(MemoryManagement_IRQn, 0, 0);
/* BusFault_IRQn interrupt configuration */
HAL_NVIC_SetPriority(BusFault_IRQn, 0, 0);
/* UsageFault_IRQn interrupt configuration */
HAL_NVIC_SetPriority(UsageFault_IRQn, 0, 0);
/* SVCall_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SVCall_IRQn, 0, 0);
/* DebugMonitor_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DebugMonitor_IRQn, 0, 0);
/* PendSV_IRQn interrupt configuration */
HAL_NVIC_SetPriority(PendSV_IRQn, 15, 0);
/* SysTick_IRQn interrupt configuration */
HAL_NVIC_SetPriority(SysTick_IRQn, 15, 0);
}
/**
* This function will initial STM32 board.
*/
void rt_hw_board_init()
{
/* Configure the system clock @ 84 Mhz */
SystemClock_Config();
HAL_Init();
#ifdef RT_USING_HEAP
rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif
#ifdef RT_USING_COMPONENTS_INIT
rt_components_board_init();
#endif
#ifdef RT_USING_CONSOLE
rt_console_set_device(RT_CONSOLE_DEVICE_NAME);
#endif
}
/*@}*/
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