Question
long pressing can not wakeup stm8l152
/**
******************************************************************************
* @file Project/STM8L15x_StdPeriph_Template/main.c
* @author MCD Application Team
* @version V1.6.1
* @date 30-September-2014
* @brief Main program body
******************************************************************************
* @attention
*
* <h2><center>© COPYRIGHT 2014 STMicroelectronics</center></h2>
*
* Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
* You may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.st.com/software_license_agreement_liberty_v2
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "stm8l15x.h"
/** @addtogroup STM8L15x_StdPeriph_Template
* @{
*/
/* Private typedef -----------------------------------------------------------*/
/* Private define ------------------------------------------------------------*/
/* Private macro -------------------------------------------------------------*/
/* Private variables ---------------------------------------------------------*/
/* Private function prototypes -----------------------------------------------*/
/* Private functions ---------------------------------------------------------*/
void delay_ms(u16 n_ms)
{
CLK_PeripheralClockConfig(CLK_Peripheral_TIM2, ENABLE);
/* Init TIMER 4 prescaler: / (2^6) = /64 */
//TIM2->PSCR = 6;
TIM2->PSCR = 3;
/* HSI div by 1 --> Auto-Reload value: 16M / 64 = 1/4M, 1/4M / 1k = 250*/
TIM2->ARRH = 0;
TIM2->ARRL = 250;
/* Counter value: 2, to compensate the initialization of TIMER*/
TIM2->CNTRH = 0;
TIM2->CNTRL = 2;
/* clear update flag */
TIM2->SR1 &= ~TIM_SR1_UIF;
/* Enable Counter */
TIM2->CR1 |= TIM_CR1_CEN;
while(n_ms--)
{
while((TIM2->SR1 & TIM_SR1_UIF) == 0) ;
TIM2->SR1 &= ~TIM_SR1_UIF;
}
/* Disable Counter */
TIM2->CR1 &= ~TIM_CR1_CEN;
}
void EXTI_setup(void)
{
ITC_DeInit();
ITC_SetSoftwarePriority(EXTI7_IRQn, ITC_PriorityLevel_1);
EXTI_DeInit();
EXTI_SetPinSensitivity(GPIO_Pin_7, EXTI_Trigger_Falling);
//EXTI_SetPinSensitivity(GPIO_Pin_7, EXTI_Trigger_Rising);
//EXTI_SetTLISensitivity(EXTI_TLISENSITIVITY_FALL_ONLY);
enableInterrupts();
}
void usart_setup(void)
{
GPIO_ExternalPullUpConfig(GPIOC, GPIO_Pin_3, ENABLE);
GPIO_ExternalPullUpConfig(GPIOC, GPIO_Pin_2, ENABLE);
CLK_PeripheralClockConfig(CLK_Peripheral_USART1, ENABLE);
USART_DeInit(USART1);
USART_Init(USART1, (uint32_t)9600, USART_WordLength_8b, USART_StopBits_1,
USART_Parity_No, (USART_Mode_TypeDef)(USART_Mode_Tx | USART_Mode_Rx));
USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);
USART_Cmd(USART1, ENABLE);
}
/**
* @brief Main program.
* @param None
* @retval None
*/
void main(void)
{
/* Infinite loop */
CLK_SYSCLKDivConfig(CLK_SYSCLKDiv_8);
GPIO_Init(GPIOE, GPIO_Pin_7, GPIO_Mode_In_PU_IT);
EXTI_setup();
loop:
halt(); // first active
usart_setup();
USART_SendData8(USART1, 'a');
delay_ms(5000);
if(GPIO_ReadInputDataBit(GPIOE, GPIO_Pin_7) == RESET)
{
//i++;
//if(i == 25)
USART_SendData8(USART1, 'n');
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
//USART_SendData8(USART1, 'G');
goto loop;
}
else
{
USART_SendData8(USART1, 'C');
while (USART_GetFlagStatus(USART1, USART_FLAG_TXE) == RESET);
}
USART_SendData8(USART1, 'b');
while (1)
{
}
}
#ifdef USE_FULL_ASSERT
/**
* @brief Reports the name of the source file and the source line number
* where the assert_param error has occurred.
* @param file: pointer to the source file name
* @param line: assert_param error line source number
* @retval None
*/
void assert_failed(uint8_t* file, uint32_t line)
{
/* User can add his own implementation to report the file name and line number,
ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/* Infinite loop */
while (1)
{
}
}
#endif
/**
* @}
*/
/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/key pe7 release , connect to nothing,
when press pe7 connect to GND
when in long press, i can not wakeup, until release
INTERRUPT_HANDLER(EXTI7_IRQHandler,15)
{
/* In order to detect unexpected events during development,
it is recommended to set a breakpoint on the following instruction.
*/
EXTI_ClearITPendingBit(EXTI_IT_Pin7);
}