情人節快樂!
PIC18F4550 LED 的程式是用 Delay Loop 來作時間的廷遲,將 PORTA RA0 的狀態由OFF 至 ON 改變,然後再由 ON 至 OFF 改變,循環不息,LED 燈便會閃動不停。
▲LED程式流程圖 |
//***** Include ****** #include //***** Define ***** #define LED0 PORTAbits.RA0 // LED0 is PORTA RA0 void delay(void) { unsigned int i; // max i=65535 for(i=0; i<50000; ++i); // 50000 90ms } //***** Program Start Here ***** void main(void) { TRISA = 0b00000000; // Setup PORTA Output while(1) { LED0=0; // LED OFF delay(); // Call Delay LED0=1; // LED ON delay(); // Call Delay } } |
//***** Configuration bits ****** // Oscillator 20MHz, CPU=48MHz, USB=48MHz #pragma config PLLDIV=5 // PLL Prescaler Selection bits 20MHz/5 #pragma config CPUDIV=OSC1_PLL2 // CPU System clock postscaler OSC1/PLL2 #pragma config USBDIV=2 // USB Clock Selectiob bit From 96MHz/2 #pragma config FOSC=HSPLL_HS // Oscillator Selection bit HS,PLL,USB #pragma config FCMEN=OFF // Fail-Safe Clock Monitor Enable bit #pragma config IESO=OFF // Int/Ext Oscillator Switchover bit #pragma config PWRT=ON // Power-up Timer Enable bit #pragma config BOR=OFF // Brown-out Reset Enable bits #pragma config BORV=0 // Brown-out Voltage bits 0=Max 3=Min #pragma config VREGEN=ON // USB Voltage Regulator Enable bit #pragma config WDT=OFF // Watchdog Timer Enable bit //#pragma config WDTPS=32768 // Watchdog Timer Postscale Select bit 1:32768 //#pragma config MCLRE=ON // MCLR Pin Enable bit ON=RE3 disable,MCLR //#pragma config LPT1OSC=ON // Low-power Timer 1 Oscillator Enable bit #pragma config PBADEN=OFF // PORTB A/D Enable bit OFF=Digital #pragma config STVREN=OFF // Stack Full/Underflow Reset Enable bit #pragma config LVP=OFF // Single-Supply ICSP Enable bit //#pragma config ICPRT=OFF // Dedicated ICSP Enable bit //#pragma config XINST=OFF // Extended Instruction Set Enable bit #pragma config DEBUG=OFF // Background Debugger Enable bit |
如果程式編譯後,沒有錯誤,程式便可以通過 MCD2 至QL1201燒寫在 MCU 上。
2011 年 02 月 14 日 天氣報告
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