C Examples 1

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LED ON

main () { TRISB=0b11111101; while(1) { PORTB.F1=1; } }

Blinking LED - 1

main () { ADPCFG = 0xFFFF; TRISB=0b11111101; PORTB.F1=1; while(1) { Delay_ms(1000); PORTB.F1=PORTB.F1^1; } }

Blinking LED - 2

main () { ADPCFG = 0xFFFF; TRISB=0b11111101; PORTB.F1=1; while(1) { Delay_ms(1000); PORTB=PORTB^0x02; } }

Timer 1

16-bit Timer Mode: In the 16-bit Timer mode, the timer increments on every instruction cycle up to a match value, preloaded into the Period register, PR1, then resets to 0 and continues to count.

When the CPU goes into the Idle mode, the timer will stop incrementing unless the TSIDL (T1CON<13>) bit 0. If TSIDL 1, the timer module logic will resume the incrementing sequence upon termination of the CPU Idle mode.

16-bit Synchronous Counter Mode: In the 16-bit Synchronous Counter mode, the timer increments on the rising edge of the applied external clock signal, which is synchronized with the internal phase clocks. The timer counts up to a match value preloaded in PR1, then resets to 0 and continues.

When the CPU goes into the Idle mode, the timer will stop incrementing unless the respective TSIDL bit o. If TSIDL 1, the timer module logic will resume the incrementing sequence upon termination of the CPU Idle mode.

Blinking LED - 3

main () { T2CON=0x8030; // Enable Timer 2 Prescaler=256 IEC0=0x0040; // Enable Interrupt for Timer 2 PR2=0xFFFF; ADPCFG = 0xFFFF; TRISB=0b11111101; PORTB=PORTB|0b00000010; while(1) { } } void interrupt_T2() org 0x000020 { PORTB=PORTB^0x02; IFS0=0x0000; }

Blinking LED - 3

main () { T2CON=0b1000000000001000; // Enable Timer 2/3 IEC0=0x0080; // Enable Interrupt for Timer 3 PR2=0xFFFF; PR3=0x0AFF; ADPCFG = 0xFFFF; TRISB=0b11111101; PORTB=0x00; while(1) { } } void interrupt_T2() org 0x000022 { PORTB=PORTB^0x02; IFS0=0x0000; }

Switch + LED

main () { ADPCFG = 0xFFFF; TRISB=0b11111101; TRISE=0b000001; PORTB=0x00; PORTE=0x1F; while(1) { if((PORTE&0b000001)==0) {PORTE.F1=PORTE.F1^1;} } }

Key DEBOUNCING - 1

main () { int i; const int Twentyms = 4210; ADPCFG = 0xFFFF; TRISB=0b11111101; TRISE=0b000001; PORTB=0x00; PORTE=0x1F; while(1) { i = 0; // Wait 20 ms for Button Up while (i < Twentyms) { if (0 == PORTE.F0) // Button Down/Start over { i = 0; } else // Button Up/Increment Count { i = i + 1; } // } //

i = 0; // Wait 20 ms for Button Down while (i < Twentyms) if (1 == PORTE.F0) // Button Up/Start over i = 0; else // Button Down/Increment Count i = i + 1;

PORTE.F1=PORTE.F1^1; // Toggle LED to Turn ON/OFF LED

} }

Key DEBOUNCING - 2

int function_key(void) { int i,m; const int Twentyms = 4210; m=1; if (1 == PORTE.F0) {return(m);} while(1) { i = 0; // Wait 20 ms for Button Up while (i < Twentyms) { if (0 == PORTE.F0) // Button Down/Start over { i = 0; } else // Button Up/Increment Count { i = i + 1; } // } //

i = 0; // Wait 20 ms for Button Down while (i < Twentyms) if (1 == PORTE.F0) // Button Up/Start over i = 0; else // Button Down/Increment Count i = i + 1;

m=0; // Toggle LED to Turn ON/OFF LED return(m); } }

Key DEBOUNCING - 2

main () { int s=1; ADPCFG = 0xFFFF; TRISB=0b11111101; PORTB=0x00; TRISE=0b000001; PORTE=0x1F; while(1) { s=function_key(); if (s==0) PORTE.F1=PORTE.F1^1; S=1; } }

Key DEBOUNCING - 3

main () { int s=1; ADPCFG = 0xFFFF; TRISB=0b11111101; PORTB=0x00; TRISE=0b000001; PORTE=0x1F; while(1) { Delay_ms(5000); PORTB=~PORTB; s=function_key(); if (s==0) PORTE.F1=PORTE.F1^1; S=1; } }

Key DEBOUNCING - 4 main () { int s=1; T2CON=0x8030; // Enable Timer 2 Prescaler=256 IEC0=0x0040; // Enable Interrupt for Timer 2 PR2=0xFFFF; ADPCFG = 0xFFFF; TRISB=0b11111101; PORTB=0x00; TRISE=0b000001; PORTE=0x1F; while(1) { s=function_key(); if (s==0) PORTE.F1=PORTE.F1^1; S=1; } } void interrupt_T2() org 0x000020 { PORTB=PORTB^0x02; IFS0=0x0000; }

UART1

UART1

unsigned rx1; unsigned char uc1;

void main() {

Uart1_Init(19200); U1MODE = 0x8400; delay_ms(200); TRISE=0b000001; PORTE=0x1F;

Uart1_Write_Char('a'); while(1) { if (Uart1_Data_Ready()) { rx1 = Uart1_Read_Char(); Uart1_Write_Char(++rx1); PORTE=~PORTE; } } }//~!

UART2

unsigned rx1; unsigned adcRes; unsigned char uc1;

void main() {

PORTB = 0x0000; TRISB = 0xFFFF; Uart1_Init(19200); U1MODE = 0x8400; delay_ms(200); TRISE=0b000001; PORTE=0x1F;

Uart1_Write_Char('a'); while(1) { adcRes = Adc_Read(3); Uart1_Write_Char(adcRes); PORTE=~PORTE; delay_ms(1000); } }//~!