The MPLABX v5.50 IDE is still has a lot of problems.
The pic-as(v2.20) tool chain is a nightmare.
This is the code I could get to work:
;
; File: main.S
; Target: PIC10F206
; Author: dan1138
; Date: 2020-08-14
; Compiler: pic-as(v2.20)
; IDE: MPLABX v5.40
;
; Depends on files:
; <InstallPathVaries>\xc8\v2.20\pic\include\xc.inc
; <InstallPathVaries>\xc8\v2.20\pic\include\pic.inc
; <InstallPathVaries>\xc8\v2.20\pic\include\pic_as_chip_select.inc
; <InstallPathVaries>\xc8\v2.20\pic\include\proc\pic10f206.inc
;
; Description:
;
; Example project for the PIC10F206 controller using the pic-as(v2.20) tool chain.
;
; Add this line in the project properties box "pic-as Global Options -> Additional options":
;
; -Wa,-a -Wl,-pStartCode=0h,-pOscCalVec=1ffh
;
PROCESSOR 10F206
PAGEWIDTH 132
RADIX dec
;
; Include target specific definitions for special function registers
;
#include <xc.inc>
;
; Set the configuration word
;
config MCLRE = OFF, CP = OFF, WDTE = ON
;
;
;
#define LED_GPIO 1
;
; Declare one byte in RAM
;
PSECT MainData,global,class=RAM,space=1,delta=1,noexec
global Counter
Counter: DS 1
;
; Simple test application that toggles
; GPIO bit x on every wake from sleep.
;
; The WDT timeout is at least 1280 milliseconds
; and at most 3968 milliseconds, will typically
; be about 2300 milliseconds. It depends on the
; temperature and the VDD voltage.
;
PSECT StartCode,class=CODE,delta=2
global Start
Start:
btfss STATUS,STATUS_nPD_POSITION
btfsc STATUS,STATUS_nTO_POSITION
clrf Counter
movlw 0xDF ; TIMER0 clock is FOSC/4
option
clrf CMCON0 ; turn off comparator
bcf OSCCAL,OSCCAL_FOSC4_POSITION; Do not drive GPIO2 with FOSC/4
movlw ~(1<<LED_GPIO)
tris GPIO
andwf GPIO,F ; set all output bits to zero
movlw (1<<LED_GPIO)
btfsc Counter,0
xorwf GPIO,F ; Turn on LED
incf Counter,F ; Increment the Counter value
movf GPIO,W
sleep ; Wake from sleep results in a reset
nop
;
Loop:
goto Loop ; Hang here waiting for a reset
;
; In the PIC10F206 the factory calibration for
; the onchip oscillator is stored as a MOVLW 0xnn
; opcode as the last instruction of code space.
; On RESET the PC is set to all ones and this
; opcode is executed, then the PC rolls over
; to zero and the first opcode of the application
; will execute.
;
PSECT OscCalVec,class=CODE,delta=2
global OscCal
OscCal:
end OscCal
