00. 目录
文章目录
- 00. 目录
- 01. PWR简介
- 02. 修改主频接线图
- 03. 修改主频相关API
- 04. 修改主频程序示例
- 05. 睡眠模式接线图
- 06. 睡眠模式相关API
- 07. 睡眠模式程序示例
- 08. 停止模式接线图
- 09. 停止模式相关API
- 10. 停止模式程序示例
- 11. 待机模式接线图
- 12. 待机模式相关API
- 13. 待机模式程序示例
- 14. 示例程序下载
- 15. 附录
01. PWR简介
-
PWR（Power Control）电源控制
-
PWR负责管理STM32内部的电源供电部分，可以实现可编程电压监测器和低功耗模式的功能
-
可编程电压监测器（PVD）可以监控VDD电源电压，当VDD下降到PVD阀值以下或上升到PVD阀值之上时，PVD会触发中断，用于执行紧急关闭任务
-
低功耗模式包括睡眠模式（Sleep）、停机模式（Stop）和待机模式（Standby），可在系统空闲时，降低STM32的功耗，延长设备使用时间
02. 修改主频接线图
03. 修改主频相关API
/******************************************************************************
* @file system_stm32f10x.c
* @author MCD Application Team
* @version V3.5.0
* @date 11-March-2011
* @brief CMSIS Cortex-M3 Device Peripheral Access Layer System Source File.
*
* 1. This file provides two functions and one global variable to be called from
* user application:
* - SystemInit(): Setups the system clock (System clock source, PLL Multiplier
* factors, AHB/APBx prescalers and Flash settings).
* This function is called at startup just after reset and
* before branch to main program. This call is made inside
* the "startup_stm32f10x_xx.s" file.
*
* - SystemCoreClock variable: Contains the core clock (HCLK), it can be used
* by the user application to setup the SysTick
* timer or configure other parameters.
*
* - SystemCoreClockUpdate(): Updates the variable SystemCoreClock and must
* be called whenever the core clock is changed
* during program execution.
*
* 2. After each device reset the HSI (8 MHz) is used as system clock source.
* Then SystemInit() function is called, in "startup_stm32f10x_xx.s" file, to
* configure the system clock before to branch to main program.
*
* 3. If the system clock source selected by user fails to startup, the SystemInit()
* function will do nothing and HSI still used as system clock source. User can
* add some code to deal with this issue inside the SetSysClock() function.
*
* 4. The default value of HSE crystal is set to 8 MHz (or 25 MHz, depedning on
* the product used), refer to "HSE_VALUE" define in "stm32f10x.h" file.
* When HSE is used as system clock source, directly or through PLL, and you
* are using different crystal you have to adapt the HSE value to your own
* configuration.
*
******************************************************************************/
修改主频的方法
system_stm32f10x.c 106行
#if defined (STM32F10X_LD_VL) || (defined STM32F10X_MD_VL) || (defined STM32F10X_HD_VL)
/* #define SYSCLK_FREQ_HSE HSE_VALUE */
#define SYSCLK_FREQ_24MHz 24000000
#else
/* #define SYSCLK_FREQ_HSE HSE_VALUE */
/* #define SYSCLK_FREQ_24MHz 24000000 */
#define SYSCLK_FREQ_36MHz 36000000
/* #define SYSCLK_FREQ_48MHz 48000000 */
/* #define SYSCLK_FREQ_56MHz 56000000 */
//#define SYSCLK_FREQ_72MHz 72000000
#endif
04. 修改主频程序示例
main.c
#include "stm32f10x.h"
#include "delay.h"
#include "oled.h"
int main(void)
{
//初始化
OLED_Init();
#if 0
//显示一个字符
OLED_ShowChar(1, 1, 'A');
//显示字符串
OLED_ShowString(1, 3, "HelloWorld!");
//显示十进制数字
OLED_ShowNum(2, 1, 12345, 5);
//显示有符号十进制数
OLED_ShowSignedNum(2, 7, -66, 2);
//显示十六进制
OLED_ShowHexNum(3, 1, 0xAA55, 4);
//显示二进制数字
OLED_ShowBinNum(4, 1, 0xAA55, 16);
#endif
OLED_ShowString(1, 1, "SYSCLK:");
OLED_ShowNum(1, 8, SystemCoreClock, 8);
while(1)
{
OLED_ShowString(2, 1, "Running");
delay_ms(500);
OLED_ShowString(2, 1, " ");
delay_ms(500);
}
return 0;
}
05. 睡眠模式接线图
06. 睡眠模式相关API
#define __NOP __nop
#define __WFI __wfi
#define __WFE __wfe
07. 睡眠模式程序示例
main.c
#include "stm32f10x.h"
#include <stdio.h>
#include "delay.h"
#include "oled.h"
#include "uart.h"
int main(void)
{
uint16_t data = 0;
OLED_Init();
uart_init();
//中断分组
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
OLED_ShowChar(1, 1, 'A');
while(1)
{
if (1 == uart_getRxFlag())
{
data = uart_getRxData();
uart_send_byte(data);
OLED_ShowHexNum(1, 1, data, 2);
}
OLED_ShowString(2, 1, "Running");
delay_ms(100);
OLED_ShowString(2, 1, " ");
delay_ms(100);
//进入睡眠模式
__WFI();
}
return 0;
}
08. 停止模式接线图
09. 停止模式相关API
RCC_APB1PeriphClockCmd函数
/**
* @brief Enables or disables the Low Speed APB (APB1) peripheral clock.
* @param RCC_APB1Periph: specifies the APB1 peripheral to gates its clock.
* This parameter can be any combination of the following values:
* @arg RCC_APB1Periph_TIM2, RCC_APB1Periph_TIM3, RCC_APB1Periph_TIM4,
* RCC_APB1Periph_TIM5, RCC_APB1Periph_TIM6, RCC_APB1Periph_TIM7,
* RCC_APB1Periph_WWDG, RCC_APB1Periph_SPI2, RCC_APB1Periph_SPI3,
* RCC_APB1Periph_USART2, RCC_APB1Periph_USART3, RCC_APB1Periph_USART4,
* RCC_APB1Periph_USART5, RCC_APB1Periph_I2C1, RCC_APB1Periph_I2C2,
* RCC_APB1Periph_USB, RCC_APB1Periph_CAN1, RCC_APB1Periph_BKP,
* RCC_APB1Periph_PWR, RCC_APB1Periph_DAC, RCC_APB1Periph_CEC,
* RCC_APB1Periph_TIM12, RCC_APB1Periph_TIM13, RCC_APB1Periph_TIM14
* @param NewState: new state of the specified peripheral clock.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void RCC_APB1PeriphClockCmd(uint32_t RCC_APB1Periph, FunctionalState NewState)
功能:
使能或者失能 APB1 外设时钟
参数:
RCC_APB1Periph: 门控 APB1 外设时钟
NewState：指定外设时钟的新状态,这个参数可以取：ENABLE 或者 DISABLE
返回值:
无
PWR_EnterSTOPMode函数
/**
* @brief Enters STOP mode.
* @param PWR_Regulator: specifies the regulator state in STOP mode.
* This parameter can be one of the following values:
* @arg PWR_Regulator_ON: STOP mode with regulator ON
* @arg PWR_Regulator_LowPower: STOP mode with regulator in low power mode
* @param PWR_STOPEntry: specifies if STOP mode in entered with WFI or WFE instruction.
* This parameter can be one of the following values:
* @arg PWR_STOPEntry_WFI: enter STOP mode with WFI instruction
* @arg PWR_STOPEntry_WFE: enter STOP mode with WFE instruction
* @retval None
*/
void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry)
功能:
进入停止（STOP）模式
参数:
PWR_Regulator: 电压转换器在停止模式下的状态
PWR_STOPEntry: 选择使用指令 WFE 还是 WFI 来进入停止模式
返回值:
无
10. 停止模式程序示例
main.c
#include "stm32f10x.h"
#include "delay.h"
#include "oled.h"
#include "CountSensor.h"
int main(void)
{
//初始化
OLED_Init();
//开启PWR时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
OLED_ShowString(1, 1, "Count:");
NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
count_sensor_init();
while(1)
{
OLED_ShowNum(1 , 7, CountSensor_Get(), 5);
OLED_ShowString(2, 1, "Running");
delay_ms(100);
OLED_ShowString(2, 1, " ");
delay_ms(100);
//进入停止模式
PWR_EnterSTOPMode(PWR_Regulator_ON, PWR_STOPEntry_WFI);
//系统重新初始化
SystemInit();
}
return 0;
}
11. 待机模式接线图
12. 待机模式相关API
PWR_EnterSTANDBYMode函数
/**
* @brief Enters STANDBY mode.
* @param None
* @retval None
*/
void PWR_EnterSTANDBYMode(void)
功能:
进入待机（STANDBY）模式
参数:
返回值:
PWR_WakeUpPinCmd函数
/**
* @brief Enables or disables the WakeUp Pin functionality.
* @param NewState: new state of the WakeUp Pin functionality.
* This parameter can be: ENABLE or DISABLE.
* @retval None
*/
void PWR_WakeUpPinCmd(FunctionalState NewState)
功能:
使能或者失能唤醒管脚功能
参数:
NewState: 唤醒管脚功能的新状态,这个参数可以取：ENABLE 或者 DISABLE
返回值:
13. 待机模式程序示例
main.c
#include "stm32f10x.h"
#include "delay.h"
#include "oled.h"
#include "key.h"
#include "rtc.h"
int main(void)
{
uint32_t alarm = 0;
//初始化
OLED_Init();
key_init();
rtc_init();
//开启PWR时钟
RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR, ENABLE);
OLED_ShowString(1, 1, "CNT: ");
OLED_ShowString(2, 1, "ALR: ");
OLED_ShowString(3, 1, "ALRF: ");
PWR_WakeUpPinCmd(ENABLE);
alarm = RTC_GetCounter() + 10;
RTC_SetAlarm(alarm);
OLED_ShowNum(2, 6, alarm, 10);
while(1)
{
OLED_ShowNum(1, 6, RTC_GetCounter(), 10); //显示32位的秒计数器
OLED_ShowNum(3, 6, RTC_GetFlagStatus(RTC_FLAG_ALR), 1);
OLED_ShowString(4, 1, "Running");
delay_ms(100);
OLED_ShowString(4, 1, " ");
delay_ms(1000);
OLED_ShowString(4, 9, "STANDBY");
delay_ms(100);
OLED_ShowString(4, 9, " ");
delay_ms(100);
OLED_Clear();
PWR_EnterSTANDBYMode();
}
return 0;
}
14. 示例程序下载
34-修改主频.rar
35-睡眠模式-UART发送和接收.rar
36-停止模式-对射式红外传感器计次.rar
37-待机模式-实时时钟.rar
15. 附录
参考: 【STM32】江科大STM32学习笔记汇总
