Bare metal GPIO driver for ESP32

Bare metal GPIO driver for ESP32 | Toggling an LED

Рет қаралды 6,317

Жыл бұрын

In this video, I write my own GPIO driver for the ESP32 microcontroller, instead of using the provided ESP-IDF headers. All memory addresses are pulled directly from the Technical Reference Manual.
[Technical Reference Manual]
www.espressif.com/sites/defau...
[Source Code]
github.com/JoshMarangoni/bare...

Пікірлер: 15

@turboimport95 5 ай бұрын

Man this was dope, explanation was great. Most people just blow right over stuff like this like its nothing.

@zaca211 2 ай бұрын

Holy crap that was simple. I just switched over the Espressif framework from Arduino and I've been messing around with their GPIO driver for a couple of hours now. Considering all I needed to do was toggle the internal LED, this saves so much hassle.

@alexclarosfernandez8467 5 ай бұрын

Your videos are great!!! Thanx a lot for your time and effort!!!

@tjwatts100 6 ай бұрын

Very useful: thanks. Great for ULP programming where there's no other option.

@aslambasha539 6 ай бұрын

Can anyone give insight on how to read GPIO pin such as button and control LED foe ESP32.

@jakewasowski1353 Ай бұрын

Thanks bro

@fadieid5638 8 ай бұрын

Great stuff, arw you willing to continue the series? I am looking for a bate metal approach to the ESP32 instead of the typical arduino core use. What topics are you looking to cover?

@Mankindux 5 ай бұрын

this is not bare metal as the dev uses esp-idf which incorporates bootloader, start linker script and so on. a bare metal approach would be to write a main, assembly file and use clang directly.

@matsvandamme1 8 ай бұрын

Nice video. Please note that GPIO_OUT_W1TS_REG and GPIO_OUT_W1TC_REG are exposed in soc/gpio_reg.h so a simple #include is sufficient, no need to define these registers inside your code. Please also note that GPIO pin numbers are exposed in hal/gpio_types.h. Same comment, no need to define GPIO5 macro again.

@PatrioticGestalt 11 ай бұрын

I tried reading the same document to see how you came about your awesome simplicity. What made you decide to avoid setting the GPIO_FUNCx_OUT_SEL register?

@EV_engineer 11 ай бұрын

For simply toggling an LED, GPIO_OUT_W1TS_REG and GPIO_OUT_W1TC_REG are generally easier to set up and offer greater flexibility. But if you have a specific hardware event that you want to use to trigger the LED, and you want to minimize CPU overhead, then GPIO_FUNCx_OUT_SEL might be more appropriate.

@jeanfernandeseng 7 күн бұрын

When this code is executed on ESP32, Is there some FreeRTOS tasks at under kernel ? I am trying to check a gpio from external source and send to serial, and the FreeRTOS under IDF sometimes run task like IPC and move the context of execution. I watched the video and I dont understand why you move to linux. Does it possible under windows create a Real Bare Bone code ? Thanks in Advance.