基于以上外部函数，编写的STM32103开发板103和GT9147触摸屏模块实现的程序，要求能够再PC9引脚接收到高电平后，能在4.3寸触摸屏显示收到高电平的次数。其中PC9引脚已定义为echo

#include "stm32f10x.h" #include "delay.h" #include "usart.h" #include "lcd.h" #include "gt9147.h" int main(void) { u16 times = 0; u8 flag = 0; NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2); delay_init(); uart_init(115200); LCD_Init(); GT9147_Init(); while (1) { if (GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_9) == 1 && flag == 0) { times++; flag = 1; LCD_ShowNum(30, 50, times, 5, 16); } else if (GPIO_ReadInputDataBit(GPIOC, GPIO_Pin_9) == 0) { flag = 0; } GT9147_Scan(0); delay_ms(10); } }