led.h

基於MCU c51/8051 讀寫SD/MMC card 再以USB 傳回電腦的範例程序

/* ELEC254 Group32 USB SD Card Reader */

#define LED_DDR  DDRE
#define LED_PORT PORTE
#define LED_BIT  3

#define LED_OFF()  LED_PORT |=  1<<LED_BIT
#define LED_ON() LED_PORT &= ~(1<<LED_BIT)