树莓派3路继电器扩展板代码

/**************************************************** P26 ----> Relay_Ch1 P20 ----> Relay_Ch2 P21 ----> Relay_Ch3 ****************************************************/ #include "bcm2835.h" #include "stdio.h" #define Relay_Ch1 26 #define Relay_Ch2 20 #define Relay_Ch3 21 int main(int argc,char **argv) { if(!bcm2835_init()) return 1; bcm2835_gpio_fsel(Relay_Ch1,BCM2835_GPIO_FSEL_OUTP); bcm2835_gpio_fsel(Relay_Ch2,BCM2835_GPIO_FSEL_OUTP); bcm2835_gpio_fsel(Relay_Ch3,BCM2835_GPIO_FSEL_OUTP); printf("Setup The Relay Module is [success]!\n"); while(1) { //Control The Channel 1 bcm2835_gpio_write(Relay_Ch1,LOW); printf("Channel 1:The Common Contact is access to the Normal Open Contact!\n"); bcm2835_delay(1000); bcm2835_gpio_write(Relay_Ch1,HIGH); printf("Channel 1:The Common Contact is access to the Normal Closed Contact!\n\n"); bcm2835_delay(1000); //Control The Channnel 2 bcm2835_gpio_write(Relay_Ch2,LOW); printf("Channel 2:The Common Contact is access to the Normal Open Contact!\n"); bcm2835_delay(1000); bcm2835_gpio_write(Relay_Ch2,HIGH); printf("Channel 2:THe Common Contact is access to the Normal Closed Contact!\n\n"); bcm2835_delay(1000); //Control The Channel 3 bcm2835_gpio_write(Relay_Ch3,LOW); printf("Channel 3:The Common Contact is access to the Normal Open Contact!\n"); bcm2835_delay(1000); bcm2835_gpio_write(Relay_Ch3,HIGH); printf("Channel 3:the Common Contact is access to the Normal Closed Contact!\n\n"); bcm2835_delay(1000); } bcm2835_close(); return 0; }