Infrared HPWM setup

[richard]

why have we shifted?
CPRxL value is the upper 8 bits of the duty cycle word valueCCP1CON bit 4 and 5 are the lower two bits



(011010010) 210>>2 = 00110100 = 52 ;high 8bits
(011010010) 210 & 3 = 00000010 = 2 ;low 2 bits

00000010<<4 = 00100000
CCP1CON = 00100000 |12 to set low bits in pwmmode

C version from microchip

void PWM1_LoadDutyValue(uint16_t dutyValue)
{
   // Writing to 8 MSBs of pwm duty cycle in CCPRL register
    CCPR1L = ((dutyValue & 0x03FC)>>2);
    
   // Writing to 2 LSBs of pwm duty cycle in CCPCON register
    CCP1CON = ((uint8_t)(CCP1CON & 0xCF) | ((dutyValue & 0x0003)<<4));
}