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Wiki 21: BluePill Adapter wiring. Touchscreen wiring

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prenticedavid
2019-03-27 16:46:07 +00:00
parent f7e0e27d40
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extras/mcufriend_how_to.txt
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@@ -134,4 +134,21 @@ It also runs on NUCLEO-F103 and TEENSY3.2 with Sparkfun Adapter
Mega: Old boards do not have SDA/SCL on AREF header. Only external I2C devices on COMMS header
Due: MAX809 Reset chip interferes with 3.3V RST on SPI header. Manual reset for Upload / Run.
21. BLUEPILL Adapter standard wiring is:
//LCD pins |D7 |D6 |D5 |D4 |D3 |D2 |D1 |D0 | |RD |WR |RS |CS |RST| |SD_SS|SD_DI|SD_DO|SD_SCK|
//STM32 pin |PA7|PA6|PA5|PA4|PA3|PA2|PA1|PA0| |PB0|PB6|PB7|PB8|PB9| |PB12 |PB15 |PB14 |PB13 | **SPI2**
Maple core: to use SPI2 for SPI. edit SPI.cpp for SPIClass SPI(2);
STM Core: to use SPI2 for SPI. edit variant.h to use PB12-PB15 for SPI_SS etc
Touchscreen needs XM, YP to be on Analog capable pins. Measure resistance with DMM to determine X, Y
300R pair is XP, XM. 500R pair is YP, YM. choose XM, YP from PA7, PA6. XP, YM from PB6, PB7
Run the Calibration sketch to get accurate TS_LEFT, TS_RT, TS_TOP, TS_BOT values.
Ignore the XP, XM, ... values. They mean nothing on a BluePill
Adafruit_Touchscreen might need: typedef volatile uint32_t RwReg;
Maple core: use Touchscreen_kbv library
STM Core: regular Touchscreen libraries should be ok.
CHANGE HISTORY: is now in "mcufriend_history.txt"