Fixes for RPI

rpi/README.txt

@@ -0,0 +1,9 @@
+The default Raspberry Pi Linux installation is missing a few tools that are required to build this library. Execute the following in a terminal command line:
+>sudo apt install libgpiod-dev
+
+The SPI bus access is off by default, so to enable it, type the following:
+>sudo raspi-config
+Select option 3 (Interface Options), then option I4 (SPI). Choose yes, then
+finish.
+
+

rpi/examples/hello_epaper/main.cpp

@@ -5,7 +5,8 @@
 // Copyright (c) 2024 BitBank Software, Inc.
 //
 #include "../../../src/bb_epaper.h"
-BBEPAPER bbep(EPD213_104x212); // InkyPHAT 2.13"
+//BBEPAPER bbep(EPD213_104x212); // InkyPHAT 2.13"
+BBEPAPER bbep(EPD295_128x296);
 // BCM GPIO numbers
 #define PIN_DC 22
 #define PIN_RST 27
@@ -14,12 +15,15 @@ BBEPAPER bbep(EPD213_104x212); // InkyPHAT 2.13"
 #define SPI_BUS 0
 
 int main(int argc, const char * argv[]) {
+
   bbep.initIO(PIN_DC, PIN_RST, PIN_BUSY, PIN_CS, SPI_BUS, 4000000);
-  bbep.fillRect(0,0,104,212, BBEP_WHITE);
+//  bbep.allocBuffer();
+  bbep.fillScreen(BBEP_WHITE);
   bbep.setRotation(90);
-  bbep.setFont(FONT_12x16);
-  bbep.setTextColor(BBEP_BLACK, BBEP_WHITE);
+  bbep.setFont(FONT_16x16);
+  bbep.setTextColor(BBEP_BLACK);
   bbep.drawString("Hello World!", 0, 0);
+//  bbep.writePlane();
   bbep.refresh(REFRESH_FULL);
   bbep.sleep(DEEP_SLEEP);
 

rpi/rpi_io.inl

@@ -34,7 +34,9 @@
 #ifndef CONSUMER
 #define CONSUMER "Consumer"
 #endif
-#define pgm_read_byte(a) *(uint8_t *)a
+#define pgm_read_byte(a) (*(uint8_t *)a)
+#define pgm_read_word(a) (*(uint16_t *)a)
+#define pgm_read_dword(a) (*(uint32_t *)a)
 #define memcpy_P memcpy
 struct gpiod_chip *chip = NULL;
 struct gpiod_line *lines[64];