Update the GENERIC-7789 firmware

[asherevan]

I updated the GENERIC-7789 firmware

[dusan-zervan]

Thank you, it is working (MicroPython v1.24.0-preview.309.gf1bdac375.dirty on 2024-09-17), but LCD SPI is limited to 26 MHz, there is an error when 40 MHz is set:

E (2261) spi_hal: spi_hal_cal_clock_conf(110): When work in full-duplex mode at frequency > 26.7MHz, device cannot read correct data.
Try to use IOMUX pins to increase the frequency limit, or use the half duplex mode.
Please note the SPI master can only work at divisors of 80MHz, and the driver always tries to find the closest frequency to your configuration.
Specify SPI_DEVICE_NO_DUMMY to ignore this checking. Then you can output data at higher speed, or read data at your own risk.

Then fatal error and reboot.

[asherevan]

I will work on fixing that.

[asherevan]

It should work now.

[dusan-zervan]

Thank you for your work, but it is still not working for me:
spi = SPI(1, baudrate = 40_000_000, sck = Pin(13), mosi = Pin(15), miso = None)

E (92552) spi_master: spi_bus_add_device(427): assigned clock speed not supported

Then the program continues, but crashes. I am using M5StickC Plus, old version was working fine on 40 MHz, some pieces (we have dozens) also on 80 MHz.

[asherevan]

It is working for me with this code:

spi = machine.SPI(1, baudrate=40000000)

It could be the pins you are using. I am not sure.

[jluiscu]

Thank you, everything works very well on the ESP32 TTGO, with the particularity of the frequency being a maximum of 26000000, but perhaps it is due to the fact that this specific board needs something special that the generic one does not have. However, for my projects, it works great. I needed ESPNOW.

[dusan-zervan]

Well, I have found the reason, why the SPI frequency is limited to 26 MHz: there is a check condition in IDF 5 which is not allowing to set higher frequency, if other than ideal pins are used. The condition is in IDF file /opt/esp/idf/components/hal/spi_hal_iram.c. Easy patch is to add this line just after all #include directives:
#undef SPI_LL_SUPPORT_TIME_TUNING

Tested on M5StickC Plus and LILYGO T-Display.

You can download my firmware builder or .bin file with latest MicroPython: https://github.com/dusan-zervan/st7789_mpy-builder