stm32 低功耗设计[操作寄存器+库函数]

时间：11-25 来源：互联网点击：

125
126 //RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA1, ENABLE);
127
128 RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR,ENABLE);
129 //RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR|RCC_APB1Periph_BKP|RCC_APB1Periph_WWDG, ENABLE);
130
131 }
132
133
134 voidUSART_Configuration(void)
135 {
136 USART_InitTypeDef USART_InitStructure;
137 USART_ClockInitTypeDef USART_ClockInitStructure;
138
139 USART_ClockInitStructure.USART_Clock = USART_Clock_Disable;
140 USART_ClockInitStructure.USART_CPOL = USART_CPOL_Low;
141 USART_ClockInitStructure.USART_CPHA = USART_CPHA_2Edge;
142 USART_ClockInitStructure.USART_LastBit = USART_LastBit_Disable;
143 USART_ClockInit(USART1 , &USART_ClockInitStructure);
144
145 USART_InitStructure.USART_BaudRate = 9600;
146 USART_InitStructure.USART_WordLength = USART_WordLength_8b;
147 USART_InitStructure.USART_StopBits = USART_StopBits_1;
148 USART_InitStructure.USART_Parity = USART_Parity_No;
149 USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
150 USART_InitStructure.USART_Mode = USART_Mode_Rx|USART_Mode_Tx;
151 USART_Init(USART1,&USART_InitStructure);
152
153 USART_Cmd(USART1,ENABLE);
154 }
155
156 voidEXTI_Configuration(void)
157 {
158 EXTI_InitTypeDef EXTI_InitStructure;
159
160 EXTI_InitStructure.EXTI_Line = EXTI_Line0;
161 EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
162 EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Falling;
163 EXTI_InitStructure.EXTI_LineCmd = ENABLE;
164
165 EXTI_Init(&EXTI_InitStructure);
166
167 }
168
169 voidNVIC_Configuration(void)
170 {
171 NVIC_InitTypeDef NVIC_InitStructure;
172
173 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);
174
175 NVIC_InitStructure.NVIC_IRQChannel = EXTI0_IRQn;
176 NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
177 NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
178 NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
179 NVIC_Init(&NVIC_InitStructure);
180 }
181
182 #if PRINTF_ON
183
184 intfputc(intch,FILE*f)
185 {
186 USART_SendData(USART1,(u8) ch);
187 while(USART_GetFlagStatus(USART1,USART_FLAG_TC) == RESET);
188 returnch;
189 }
190
191 #endif
stm32f10x_it.c
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01 #include "stm32f10x_it.h"
02
03 #include "stdio.h"
04
05
06 voidEXTI0_IRQHandler(void)
07 {
08 GPIO_WriteBit(GPIOA,GPIO_Pin_7,Bit_SET);
09
10 //EXTI_ClearFlag(EXTI_Line0); //清除此中断标志位，系统由于唤醒将直接复位
11
12 }
13
14 voidSysTick_Handler(void)
15 {
16 GPIO_WriteBit(GPIOA,GPIO_Pin_4,(BitAction)(1-GPIO_ReadOutputDataBit(GPIOA,GPIO_Pin_4)));
17 }

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