How can I speed this code up? SHIFTOUT is slowing it down and I need a faster way.

[wolwil]

Hi,
However, BIT 1 as you've specified means it tries to map it to PORTB.1 which isn't valid.

/Henrik.

See I was confused because in the manual it said:

bit 3-0 CCP1M<3:0>: CCP1 Mode Select bits
0000 = Capture/Compare/PWM disabled (resets CCP1 module)
0100 = Capture mode, every falling edge
0101 = Capture mode, every rising edge
0110 = Capture mode, every 4th rising edge
0111 = Capture mode, every 16th rising edge
1000 = Compare mode, set output on match (CCP1IF bit is set)
1001 = Compare mode, clear output on match (CCP1IF bit is set)
1010 = Compare mode, generate software interrupt on match (CCP1IF bit is set, CCP1 pin is
unaffected)
1011 = Compare mode, trigger special event (CCP1IF bit is set, CCP1 pin is unaffected); CCP1
resets TMR1 and starts an A/D conversion (if A/D module is enabled)
11xx = PWM mode

So I was thinking the xx was what I was setting so I figured the LSB was 1 for port B0 and 2 for B3. Like I said I was confused

So you are saying all I need to do is say 0 and not 1, right?

Hi Wolwil,

You could replace PBP SHIFTOUT with attached ASM code example and reduce time spend in SHIFTOUT + loop to ~1/8. This is kind of tested, but no promises ... Check if it is usefull for you.

PBP_shiftout execution time was around 814uS, but ASM_shiftout took only 104uS to do the same.

BR,
-Gusse-

Thanks I will try this out tonight!