75 lines
1.8 KiB
C
75 lines
1.8 KiB
C
// led blink example Copyright (C) 2014 Diego Herranz
|
|
|
|
#define NO_BIT_DEFINES
|
|
#include <pic14regs.h>
|
|
#include <stdint.h>
|
|
|
|
// Oscillator Selection bits (INTOSCIO oscillator: I/O function on RA6/OSC2/CLKOUT pin, I/O function on RA7/OSC1/CLKIN),
|
|
// disable watchdog,
|
|
// and DO NOT disable low voltage programming.
|
|
// The rest of fuses are left as default.
|
|
__code uint16_t __at (_CONFIG1) __configword = _FOSC_INTOSC & _CLKOUTEN_OFF & _WDTE_OFF & _BOREN_ON & _CP_OFF;
|
|
|
|
#define LED_PORT PORTCbits.RC5
|
|
#define LED_TRIS TRISCbits.TRISC5
|
|
|
|
// board layout:
|
|
// mosfets clockwise from power feed:
|
|
// RA5, RA4, RC2, RC3
|
|
// 'input' pin: RC5
|
|
|
|
// Uncalibrated delay, just waits a number of for-loop iterations
|
|
void delay(uint16_t iterations)
|
|
{
|
|
uint16_t i, j;
|
|
|
|
for (i = 0; i < iterations; i++) {
|
|
// Prevent this loop from being optimized away.
|
|
//for (j = 0; j < 12; j++) {
|
|
__asm nop __endasm;
|
|
//}
|
|
}
|
|
}
|
|
#define PPSO_PWM1 3
|
|
void main(void)
|
|
{
|
|
OSCCON = 0xf0;
|
|
TRISC = 0;
|
|
//SLRCONC = 0;
|
|
OPTION_REGbits.PSA = 1;
|
|
LED_PORT = 0;
|
|
PWM1CLKCON = 0x00; // From Fosc w/o prescaler
|
|
PWM1PRH = PWM1PRL = 0xFF;
|
|
PWM1PH = 0;
|
|
PWM1DCH = PWM1DCL = 0;
|
|
PWM1OF = 0;
|
|
|
|
|
|
PWM1INTE = 0x00; // no interrupts enabled
|
|
PWM1INTF = 0x00; // clear interrupt flag
|
|
PWM1LDCON = 0x80; // load armed
|
|
PWM1OFCON = 0x00; // independent run mode
|
|
PWM1CON = 0x80; // enable, standard PWM mode, active high output
|
|
|
|
RC5PPS = PPSO_PWM1;
|
|
//PWM1OUT = 1;
|
|
|
|
|
|
|
|
while(1) {
|
|
delay(1);
|
|
while (PWM1DCL < 0xFF || PWM1DCH < 0xFE) {
|
|
if (PWM1DCL == 0xFF) PWM1DCH++;
|
|
PWM1DCL++;
|
|
PWMLD = 1;
|
|
delay(1);
|
|
}
|
|
while (PWM1DCL > 0 || PWM1DCH > 0) {
|
|
if (PWM1DCL == 0) PWM1DCH--;
|
|
PWM1DCL--;
|
|
PWMLD = 1;
|
|
delay(1);
|
|
}
|
|
}
|
|
}
|