1 /**************************************************************************//**
2 * @brief Gpio回调函数
3 * @param pin - pin which triggered interrupt
4 *****************************************************************************/
5 void gpioCallback(uint8_t pin)
6 {
7 if (pin == 9)
8 {
9 BSP_LedToggle(3); //端口翻转，LED亮灭交替
10 }
11 else if (pin == 10)
12 {
13 BSP_LedToggle(0);
14 }
15 }
16
17 /**************************************************************************//**
18 * @brief Gpio setup. Setup button pins to trigger falling edge interrupts.
19 * Register callbacks for that interrupts.
20 *****************************************************************************/
21 void gpioSetup(void)
22 {
23 /* Enable GPIO in CMU */
24 CMU_ClockEnable(cmuClock_GPIO, true);
25
26 /* Initialize GPIO interrupt dispatcher */
27 GPIOINT_Init();
28
29 /* Configure PB9 and PB10 as input */
30 GPIO_PinModeSet(gpioPortB, 9, gpioModeInput, 0);
31 GPIO_PinModeSet(gpioPortB, 10, gpioModeInput, 0);
32
33 /* Register callbacks before setting up and enabling pin interrupt. */
34 GPIOINT_CallbackRegister(9, gpioCallback);
35 GPIOINT_CallbackRegister(10, gpioCallback);
36
37 /* Set falling edge interrupt for both ports */
38 GPIO_IntConfig(gpioPortB, 9, false, true, true);
39 GPIO_IntConfig(gpioPortB, 10, false, true, true);
40 }
41
42 /**************************************************************************//**
43 * @brief Main function
44 *****************************************************************************/
45 int main(void)
46 {
47 /* Chip errata */
48 CHIP_Init();
49
50 /* If first word of user data page is non-zero, enable eA Profiler trace */
51 BSP_TraceProfilerSetup();
52
53 /* Initialize gpio */
54 gpioSetup();
55
56 /* Initialize LED driver */
57 BSP_LedsInit();
58
59 /* Infinite loop */
60 while (1);
61 }
按下板上的按键（PB0、PB1）将会实现LED的亮灭交替。