Lolin-S2 (ESP32S2)

[AndyThirtover]

Hi there. Would it be possible to build firmware for the ESP32S2? My chip gives:

Chip is ESP32-S2FH32 Features: WiFi, Embedded 4MB Flash, 105C temp rating, ADC and temperature sensor calibration in BLK2 of efuse Crystal is 40MHz

I tried flashing with the generic ESP32 firmware - but sadly this failed.

Double regards

Andy

[russhughes]

Micropython has firmware (https://micropython.org/download/?mcu=esp32s2) for several ESP32-S2 based boards. If your board is one of the boards listed, it would be easy for me to compile a firmware with the driver. If not, it will require a custom board definition. Do you have a link to information about the board?

[AndyThirtover]

Hi there.
This is the best reference I can find: https://www.wemos.cc/en/latest/s2/s2_mini.html Because it is so small I believe it will make a great pairing with the 240x240 1.15in displays.

Double Regards

Andy

[russhughes]

Try firmware/LOLIN_S2_MINI/firmware.bin from bfac0c3fd6ea82afa8acf4b16eaf0cafbf5eee7e.

[AndyThirtover]

Here's the results of the first load:

MicroPython v1.18-141-gff9c70850-dirty on 2022-02-22; LOLIN_S2_MINI with ESP32-S2FN4R2 Type "help()" for more information.

I'm about to connect up a TFT screen.

[AndyThirtover]

OK, so I have failed to get a screen working. I'm using this schematic: https://www.wemos.cc/en/latest/_static/files/sch_s2_mini_v1.0.0.pdf and this tft_config: `from machine import Pin, SPI import st7789

TFA = 0 BFA = 0

def config(rotation=0, buffer_size=0, options=0): return st7789.ST7789( SPI(2, baudrate=31250000, sck=Pin(7), mosi=Pin(11)), 240, 240, reset=Pin(12, Pin.OUT), dc=Pin(13, Pin.OUT), backlight=Pin(14, Pin.OUT), rotation=rotation, options=options, buffer_size=buffer_size) ` I also tried the options on pins 33,35. There is less documentation available for the ESP32-S2 so I can't quite work out what the SPI number should be. I've tried both 1 and 2. I've been reading up about SPI Modes and I'm wondering if this is the issue. Cheers

Andy

[AndyThirtover]

And in other news. A 320x240 display with a CS line WORKS (Slap like etc). Now I'll research how to work with a display that does not have CS.

[AndyThirtover]

In extra more news. The screen I'm using seems to requite a few more SPI params:

SPI(2, baudrate=30000000, polarity=1, phase=1, sck=Pin(7), mosi=Pin(11)),

I consider the firmware running and tests - Job Done Tick ;)

[russhughes]

Excellent.