Arduino library for XPT2046 / ADS7843 touchscreen driver updated for Maple Leaf Mini (STM32F1) and multiple SPI port selection, on the Arduino IDE 1.6.5 (or later).
Forked from Spiros Papadimitriou's excellent XPT2046 library repo spapadim/XPT2046.
Trying to get the TJCTM24024-SPI touch (XPT2046/ADS7843) and TFT (ILI9341) to work together on a Maple Leaf Mini STM32F1 doesn't work using the same HW SPI interface. The Adafruit_ILI9341_STM library in the Maple Leaf Arduino STM32 libraries runs the Hardware SPI too fast for the Touch SPI interface. Also, the Arduino STM32 SPI library doesn't support the transfer16(uint16_t value) function available in newer, standard Arduino IDE installations for Arduino boards.
In addition to the original class constructor, I have added a new one that let's you select the SPI port to use.
XPT2046 (uint8_t cs_pin, uint8_t irq_pin); // Original
XPT2046 (uint8_t cs_pin, uint8_t irq_pin, uint32_t spiPortNumber); // New
Using the original constructor will result in SPI Port 1 on the Maple Leaf Mini STM32F1 being selected, as in Spiros' original implementation.
Using the second constructor, a different Hardware SPI port can be selected. I have tested it with SPI Port 2.
The Examples included with the library have also now been updated. For example, here is XPTPaint:
