[应用相关] 手机红外遥控器发送红外信号到STM32【HAL库】

            void delay_us(uint32_t i)



            {



                uint32_t temp;



                SysTick->LOAD=9*i;



                SysTick->CTRL=0X01;



                SysTick->VAL=0;



          do



                {



                    temp=SysTick->CTRL;



                }



              while((temp&0x01)&&(!(temp&(1<<16))));



              SysTick->CTRL=0;



              SysTick->VAL=0;



          }

/*Configure GPIO pin : PG15 */



GPIO_InitStruct.Pin = GPIO_PIN_15;



GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING;  //下降沿触发



GPIO_InitStruct.Pull = GPIO_PULLUP;  //上拉模式



HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);

#ifdef __GNUC__



/* With GCC/RAISONANCE, small printf (option LD Linker->Libraries->Small printf



set to 'Yes') calls __io_putchar() */



#define PUTCHAR_PROTOTYPE int __io_putchar(int ch)



#else



#define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)



#endif /* __GNUC__ */



/**



* @brief  Retargets the C library printf function to the USART.



* @param  None



* @retval None



*/



PUTCHAR_PROTOTYPE



{



/* Place your implementation of fputc here */



/* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */



HAL_UART_Transmit(&huart1, (uint8_t *)&ch, 1, 0xFFFF);



return ch;



}