#Eeprom esp32 how to#
#Eeprom esp32 full#
#Eeprom esp32 verification#
#Eeprom esp32 software#
#Eeprom esp32 code#

#Eeprom esp32 code#

It wasn’t working when I started with the code and I never had a chance to get in to figure out why. When I was working on TinyBasic Plus, I didn’t finish “Input”. I added the “plus” stuff to TinyBasic, but I had no involvement with the ESP32 port of it, so i can’t speak to the specifics of that platform. (not sure if my first reply went through or not) Posted in Hackaday Columns, Microcontrollers, Slider Tagged basic, Basic Language, Basic on ESP32, easter egg, ESP32, rom Post navigation But we had a fun afternoon dredging up BASIC skills. They’re also continuing to work like crazy on development of the C libraries that real programmers will use to run these chips, so it’s probably not a top priority for them to implement peek inside an Easter egg.

#Eeprom esp32 full#

Have fun! These Are Not The Droids…Īnyway, the big news is that the Espressif team has gotten most of the Arduino core up and working, and we have a full review coming out soon. The rest is a simple matter of software.įor what any of these numbers mean, see the memory map in the technical docs (PDF). We toggled input voltage on another GPIO and watched the bits bobble. The following code enables GPIO 4 as output, turns it on and then off again, and then prints out the value of the GPIOs inputs in hex. Indeed, confirms that they did make use of them during the initial chip check-out phase. Peek and poke work! I just didn’t guess the syntax correctly. Peek and poke are the raison d’être for BASIC.

While you don’t often have cause for twiddling individual bits inside your desktop computer, interactively flipping those little silicon switches is a fantastic tool when dealing with a microcontroller with memory-mapped hardware peripherals. It appears that they weren’t implemented, which is a shame because those two commands are practically the best feature of BASIC for exploring around the insides of a new chip in real-time. We couldn’t get peek and poke working for the life of us. Going down the list, we were bummed out to find that many of the functions that we’d like to teach a young child programming just weren’t there. ioget, which should read the logic voltage on a pin, doesn’t seem to work either. There’s an rseed command, and the help lists a rnd but it looks like a syntax error when we try to use it in a function.

#Eeprom esp32 how to#

There is a print command, and an input command, but we couldn’t figure out how to handle strings, so we never got further thanġ00 PRINT 'That’s my favorite number too.' It’s easier than getting started with Arduino! Mysteries and Missingīut that’s also about as far as we got. That means blinking LEDs is just a few words away.Īnd there was looping and blinking. Now, our BASIC is a bit rusty, dating from the Tandy Color Computer days, but we quickly whipped up a few demos and frankly, we had a lot of fun.ĮSP32 ROM Basic (c) 2016 Espressif Shanghaiĭerived from TinyBasic Plus by Mike Field and Scott LawrenceĮspressif was nice enough to add iodir and ioset commands to the BASIC, and they let you set the data direction of any pin (input or output) and either read or write to it. Available commands/functions:” and then lists out everything you need to get started. The ESP32 comes back with “A very Basic ROM console. What’s the first thing you do when faced with a command prompt? Type “help”, right? Well, that works.

Set your terminal program up to send only a linefeed at the end of each line and you’re off! Don’t have an ESP32 on hand to try this? I recorded a screencast of my adventures so at least you can join me for the ride. Falling back to built-in command interpreter. Connect to the ESP32 over serial, and hit enter to stop it from continually rebooting. Don’t ask us.Īnyway, the short version of the story is: pull GPIO 12 high and hit reset. It looks like whatever boot ROM the ESP32 has inside it is testing for a high voltage on GPIO 12.

#Eeprom esp32 verification#

But a little verification with ‘scope and continuity tester verifies that no data is going across this pin at bootup, and the SPI lines for the flash aren’t even broken out from the module. And you’ll absolutely get an LED blinking faster in ESP32 BASIC than you will on an Arduino!Īt first, we thought that the key to getting into the BASIC shell was simply blocking the onboard flash program ROM, because we discovered it by connecting to GPIO 12, labeled as the MOSI pin for “HSPI”. Still, it’s great fun to play around in real-time with the chip.

That’s a cool little hack to find, but we couldn’t find some crucial functions that would have made it a lot more useful. Along the way, we stumbled on an Easter egg: the ESP32 processor has a built-in BASIC interpreter to fall back on.

#Eeprom esp32 software#

We’ve been keeping up with the ongoing software developed for the ESP32 WiFi chip, and that means a lot of flashing, hooking up random wires, and rebooting.