16F1789 16 bit PWM

[Mikam]

Hi all
i'm getting an 8 bit output but not 16bit.
`

 ;Chip Settings
#chip 16F1789,32

'------------------------
'GCB v0.98.03  2018-10-20
'------------------------
'cccp1 out
dir portc.2 out

#define HPWM16_1_Freq 10
#define HPWM16_1_Duty 50
HPWM16On ( 1 )

'HPWM 1, 10, 255

Main:
goto Main

`

[Anobium]

You have a bit of mixtur of commands... hence the confusion.

This code will work. But, as the CCP duty constant is essentially a 8-bit number in the range of 0 to 100 I am not sure the revalance of the 16bit.

;Chip Settings
#chip 16F1789,32
'cccp1 out
dir portc.2 out

#define PWM_Freq 10       'Frequency of PWM in KHz
#define PWM_Duty 50       'Duty cycle of PWM
PWMOn

Main:
goto Main

This device is not really 16bit PWM module, they simply compare a 16bit timer. There is is a specific 16bit PWM that is really 16bit. The 16f1789 is CCP fixed on the imer 2 - not a true 16bit PWM module.

For this device this works for variable PWM and duty.

'Main code
'freq 40khz
'variable duty from 0% to 100%
do
    'Turn up brightness over 2.5 seconds
    For Bright = 1 to 255
        HPWM 1, 40, Bright
        wait 10 ms
    next
    'Turn down brightness over 2.5 seconds
    For Bright = 255 to 1
        HPWM 1, 40, Bright
        wait 10 ms
    next
loop

end

[Mikam]

Thanks for clearing up.

[Anobium]

And, the datasheet is 100% incorrect.

High-Performance PWM Controller:
• Four Programmable Switch Mode Controller
(PSMC) modules:
- Digital and/or analog feedback control of
PWM frequency and pulse begin/end times
- 16-bit Period, Duty Cycle and Phase
- 16 ns clock resolution
- Supports Single PWM, Complementary,
Push-Pull and 3-phase modes of operation
- Dead-band control with 8-bit counter
- Auto-shutdown and restart
- Leading and falling edge blanking
- Burst mode

Should read....not PWM but PSMC

High-Performance PSMC Controller:
• Four Programmable Switch Mode Controller
(PSMC) modules:
- Digital and/or analog feedback control of
PWM frequency and pulse begin/end times
- 16-bit Period, Duty Cycle and Phase
- 16 ns clock resolution
- Supports Single PWM, Complementary,
Push-Pull and 3-phase modes of operation
- Dead-band control with 8-bit counter
- Auto-shutdown and restart
- Leading and falling edge blanking
- Burst mode

As later in the datasheet .. it states...

Two Capture/Compare/PWM modules (CCP):
- 16-bit capture, maximum resolution 12.5 ns
- 16-bit compare, max resolution 31.25 ns
- 10-bit PWM, max frequency 32 kHz

No wonder.. people get confused.

[Anobium]

And, in the very latest release we have included the PSMC software... so, if you have a year or two to learn PSMC then you could generate a 16bit PWM signal via the PSMC module.

[William Roth]

I tried the PSMC tool and got an exception error when I tried to change a value. Using Win 10
Will investigate further