Hi Mike,
I used a 10-bit DAC with PIC16F1765 in my Digital Controlled Power Supply:
Digital Controlled Linear Power Supply : 6 Steps (with Pictures) -
Instructables<https://www.instructables.com/Digital-Controlled-Linear-Power-Supply/>
I used two functions.
; Initialize the 10-bit Digital to Analog Converter (DAC)
procedure dac_init() is
; Enable, right justified, output enable, use VDD as reference, VRef- to VSS.
DAC1CON0 = 0b1010_0000 ; VDD reference.
dac_set(MIN_DAC_VALUE) ; Output at minimum
end procedure
; Write the given value to the 10-bit DAC.
procedure dac_set(word in value) is
DAC1REF = value
DACLD_DAC1LD = TRUE
while DACLD_DAC1LD loop
; Wait for DAC to complete transfer.
end loop
end procedure
This was a very fruitful project for JAL since I extracted two JAL libraries
from it, one to control a digital potentiometer and one to write data into HEF
(this PIC does not have EEPROM but HEF instead) 😊
Hope this helps.
Kind regards,
Rob
________________________________
Van: 'Mike' via jallib <[email protected]>
Verzonden: zaterdag 28 november 2020 03:37
Aan: jallib <[email protected]>
Onderwerp: [jallib] PIC16F1778 10-bit DAC, anyone?
I'm trying to get the 10-bit DAC of the PIC16F1778 working and am not being
successful. Has anyone used this, or similar? I'm scoping the output pin and
getting nothing. Below is my code. Any push in the right direction is
appreciated.
Regards,
Mike
--
include 16f1778 -- target PICmicro
--
pragma target clock 8_000_000 -- oscillator frequency
--
pragma target OSC INTOSC_NOCLKOUT -- internal oscillator
pragma target PLLEN DISABLED -- PLL off
pragma target CLKOUTEN DISABLED -- no clock output
pragma target WDT DISABLED -- watchdog off
pragma target BROWNOUT DISABLED -- no brownout reset
pragma target FCMEN DISABLED -- no clock monitoring
pragma target IESO DISABLED -- no int/ext osc switching
pragma target LVP DISABLED -- low voltage programming off
pragma target MCLR INTERNAL -- internal reset
--
--
OSCCON_SCS = 0 -- select primary oscillator
OSCCON_IRCF = 0b1110 -- 8 MHz
OSCCON_SPLLEN = FALSE -- software PLL off
--
enable_digital_io() -- make all pins digital I/O
--
LATA = 0
LATB = 0
LATC = 0
TRISA = 0
TRISB = 0
TRISC = 0
DAC1REFL = 0
DAC1REFH = 0
DAC1CON0 = 0b1010_0000 -- DAC on and output to the pin
--
var byte c = 0
--
forever loop
for 255 using c loop
DAC1REFL = c
DACLD_DAC1LD = true
_usec_delay(100_000)
end loop
end loop
--
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