Just tested the jallib blink sample (which is running at 4 MHz). At pin_A4 see a freq. of 0.998 MHz. So it seems like you have a hardware/wiring problem..

On 14-12-2024 12:15, vsurducan wrote:
Hi Rob,
I'm trying to understand the PWM in PIC12F1572, for which the pwm library can not be used.

I need to see the system clock.
The problem is that I can not make it visible on clockout pin. The following code should do it?

include 12f1572                     -- target PICmicro
--
;pragma target clock    32_000_000       -- oscillator frequency
pragma target clock    8_000_000       -- oscillator frequency
--
pragma target OSC      INTOSC_NOCLKOUT           -- internal oscillator
pragma target PLLEN    DISABLED                  -- PLL off
pragma target CLKOUTEN ENABLED                  -- clock output enabled
pragma target WDT      DISABLED                  -- watchdog
pragma target BROWNOUT DISABLED                  -- no brownout reset
pragma target LVP      ENABLED                   -- low voltage programming
pragma target MCLR     EXTERNAL                  -- external reset
--

OSCCON_SCS = 0                      -- select primary oscillator
OSCCON_IRCF = 0b1110                -- 8 MHz
;OSCCON_SPLLEN = ENABLED               -- software PLL on 8x4=32MHz
OSCCON_SPLLEN = DISABLED    - 8Mhz OSC
--
enable_digital_io()                 -- make all pins digital I/O
pin_A4_direction = output ; output osc/4
--
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--
*Rob H*amerling, Vianen, NL

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