Added Pimoroni Inkyphat B/W 2.13 example

rpi/examples/pimoroni_213/Makefile

@@ -0,0 +1,13 @@
+CFLAGS=-D__LINUX__ -Wall -O2 -I../../
+LIBS=-lbb_epaper -lgpiod
+
+all: pimoroni_213
+
+pimoroni_213: main.o
+	$(CXX) main.o $(LIBS) -o pimoroni_213 
+
+main.o: main.cpp
+	$(CXX) $(CFLAGS) -c main.cpp
+
+clean:
+	rm -rf *.o pimoroni_213

rpi/examples/pimoroni_213/main.cpp

@@ -0,0 +1,39 @@
+//
+// C++ example for bb_epaper library
+// written by Larry Bank (bitbank@pobox.com)
+// Project started 9/23/2024
+// Copyright (c) 2024 BitBank Software, Inc.
+//
+#include <bb_epaper.h>
+BBEPAPER bbep(EP213_122x250);
+// BCM GPIO numbers used by Pimoroni e-paper "HATs"
+#define PIN_DC 22
+#define PIN_RST 27
+#define PIN_BUSY 17
+#define PIN_CS 8
+#define SPI_BUS 0
+
+int main(int argc, const char * argv[]) {
+
+  bbep.initIO(PIN_DC, PIN_RST, PIN_BUSY, PIN_CS, SPI_BUS, 8000000);
+  bbep.allocBuffer(); // draw into RAM first
+  if (bbep.width() < bbep.height()) { // rotate to landscape mode
+      bbep.setRotation(90);
+  }
+  bbep.fillScreen(BBEP_WHITE);
+  bbep.setFont(FONT_12x16);
+  bbep.setTextColor(BBEP_BLACK);
+  bbep.setCursor(0,0);
+  bbep.println("arrrrrgh Pimoroni");
+  bbep.println("Inkyphat is easy to");
+  bbep.println("use in bb_epaper!");
+  for (int i=20; i<50; i += 5) {
+     bbep.drawRoundRect(bbep.width()/2 - i, bbep.height()/2, i*2, i, 10, BBEP_BLACK);
+  }
+  bbep.writePlane(); // push the pixels from our RAM buffer to the e-epaper
+  bbep.refresh(REFRESH_FULL); // do a full refresh (only type possible on B/W/R)
+  bbep.sleep(DEEP_SLEEP); // turn off the epaper power circuit
+  return 0;
+} /* main() */
+
+