Pico 2 and Pico 1 Touch Macropad fixes

[TobiasVanDyk]

• Pico 2's have now been acquired from the local Pishop.co.za
  Look here or here, but note this RP2350 Errata E9 - Pull-down lock-up. Currently testing 640x480 (two 480x320 screens mounted side-by-side) as touch macropads.

• Also note issue #3465 regarding resistive touchscreens here. The Bodmer Keypad_240x320.ino example runs on the Waveshare IPS ST7789 LCD Pico Board 320x240 2.8 inch with touch working - but use one of the four 2.5.43 fixes described below.
  The Pico 2 seems to work with this LCD's resistive touch panel if its calData[5] are about 4388 3451 4492 3465 t. But sometimes parameter 1 and 3 change and are then very large > 10k values (61874 and 61733 have been observed which could be overflow values from the 16-bit variables used in calData), appear, and there is then no touch response.

• Similarly the Waveshare LCD Type C (125MHz) was constructed on a breadboard and compiled with Pico SDK 2.1.0, Arduino Pico 4.3 and the included Adafruit_TinyUSB_Arduino 3.3.4, and TFTeSPI 2.5.43. The sourcecode removed PicoSDK RTC functions and PicoSDK includes. This yielded a fully working touchpad with correct calibration data calData[5] = { 288, 3625, 270, 3548, 5 }. BUT using the exact same code, the same Pico 2 and the same LCD, but constructing it on stripboard, was non touch-responsive and yielded incorrect calibration data: calData[5] = { 61745, 3595, 61707, 3444, 5 }. The code and build file used are attached below.

VolumeMacroPad201.zip

• ST7789 LCD Macropad and TFT_eSP V2.5.43 fix:
  Recommended fix: Replace line 52 in the file Processors/TFT_eSPI_RP2040.h with the line as below:

  // Processor specific code used by SPI bus transaction begin/end_tft_write functions
  #define SET_BUS_WRITE_MODE spi_set_format(SPI_X,  8, (spi_cpol_t)(TFT_SPI_MODE >> 1), (spi_cpha_t)(TFT_SPI_MODE & 0x1), SPI_MSB_FIRST)
  // Old line
  //#define SET_BUS_READ_MODE  spi_set_format(SPI_X,  8, (spi_cpol_t)0, (spi_cpha_t)0, SPI_MSB_FIRST)
  // New line see https://github.com/Bodmer/TFT_eSPI/discussions/3561
  #define SET_BUS_READ_MODE  spi_set_format(SPI_X,  8, (spi_cpol_t)(TFT_SPI_MODE >> 1), (spi_cpha_t)(TFT_SPI_MODE & 0x1), SPI_MSB_FIRST)

Also try adding: #define TFT_SPI_MODE SPI_MODE0 to TFT_eSPI.h refer to:

https://github.com/Bodmer/TFT_eSPI/issues/3564
It seems that the problem with the black screen depends on this option:
// Some ST7789 boards do not work with Mode 0
#ifndef TFT_SPI_MODE
  #if defined(ST7789_DRIVER) || defined(ST7789_2_DRIVER)
    #define TFT_SPI_MODE SPI_MODE3
  #else
    #define TFT_SPI_MODE SPI_MODE0
  #endif
#endif
The display works only if SPI_MODE0 mode is selected

Newer fixes: Use the 3files or 2files fix when using TFT_eSPI-Bodmer version 2.5.43 and also read this

Working2Files.zip
WorkingFiles3Files.zip

Old fix: To obtain a working Touch-Macropad for the the Waveshare IPS ST7789 LCD Pico Board 320x240 2.8 inch using Bodmer TFT_eSPI version 2.5.43 replace the file Processors/TFT_eSPI_RP2040.h with the same file from the previous version V2.5.34.

Also see the comment Bodmer/TFT_eSPI/issues/3476: For file TFT_eSPI_RP2040.h

Replace:
2.5.43 #define SET_BUS_READ_MODE  spi_set_format(SPI_X,  8, (spi_cpol_t)0, (spi_cpha_t)0, SPI_MSB_FIRST)
With:
2.5.34 #define SET_BUS_READ_MODE  // spi_set_format(SPI_X,  8, (spi_cpol_t)0, (spi_cpha_t)0, SPI_MSB_FIRST)

• Choosing an LCD Touch Display: Of the 5 different LCD displays tested here, with the firmware as attached below, my favourite is the fast Waveshare 3.5 inch Type C 125MHz LCD display (even though it is not an IPS screen). It is available here.

• Win11 24H2 new icon-bar with labels is good! - but you do not need icons here - they could have used buttons labelled Cut-Copy-Rename-Delete.

Old Win11 22H2:

New Win11 24H2:

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