HPR4497: fixing 328eforth

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Table of Contents

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1. 
   

   greetings

   
   


2. 
   

   links to software

   
   


3. 
   

   hardware

   
   


4. 
   

   install

   
   


5. 
   

   check it works

   
   


6. 
   

   now the fix

   
   


7. 
   

   outro

   
   

0 greetings

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continuation from episode 4388, review of the book the Arduino
controlled by eforth by dr chen-hanson ting

1 links to software

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https://github.com/PeterForth/DR-TING-OFFETE-SVFIG-MIRROR,
328eforth source code

https://github.com/Ro5bert/avra,
opensource assembler

https://www.engbedded.com/fusecalc/,
configuration fuse calculator

https://github.com/avrdudes/avrdude,
flashing software

https://github.com/oh2aun/flashforth,
terminal shell programs

2 hardware

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programmer, avrisp2 recommended, build your own

https://www.hackerpublicradio.org/eps/hpr2799/index.html

Arduino UNO R3, Arduino Nano

3 install

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download 2159_328eforth.zip unzip that file then cd into it

build assembler file, avra 328eforth220.asm

50+ warnings that avra generates because it pads out the words

with null characters in order to get the write size for each
word

an over view of whats going on in the build process

flashing process from the book,

avrdude -p m328p -c avrisp2 -e -U flash:w:328eforth220.hex:i -U
lfuse:w:0xff:m -U hfuse:w:0xd8:m -U efuse:w:0xfd:m

what i use,

avrdude -p m328p -c avrisp2 -e -U flash:w:328eforth220.hex:i -U
lfuse:w:0xe2:m -U hfuse:w:0xd8:m -U efuse:w:0xfd:m

4 check it works

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open terminal and plug in board, or reset board you should see,

328eforth v2.20 if you hit the return key you'll get an ok

5 now the fix

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clues from turnkey

flush+

: flush+ ( -- )

context @ context i!

cp @ cp i!

dp @ dp i!

last @ last i!

flush

;

\ flush+ at the terminal prompt saves words,updates the memory
pointers

\ saving words across reboots

now you can save newly defined words across reboots

6 outro

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