void init_uart() SCON = 0x50; TMOD void send_string(char *s) while(*s) SBUF = *s++; while(!TI); TI = 0;
Add a push button to increment the count manually. Project 3: Digital Dice with 7 LEDs Difficulty: Intermediate Components: 7 LEDs (arranged like a dice face), 7x 220Ω resistors, 1 push button at89c2051 projects
Since the AT89C2051 lacks hardware PWM, we generate it using Timer0 interrupt. unsigned int duty = 1500; // 1.5ms center void timer0_isr() interrupt 1 static bit state = 0; if(state == 0) P1_0 = 1; TH0 = 0xFC; // 1ms? Actually calculate for 1.5ms TL0 = 0x18; state = 1; else P1_0 = 0; TH0 = 0xFE; // 20ms - duty TL0 = 0x??; state = 0; void init_uart() SCON = 0x50; TMOD void send_string(char