Added partial update clock example

2026-04-29 13:43:26 -07:00 · 2024-11-03 13:49:31 +00:00
parent 6e2819bbd3
commit b6739e131c
4 changed files with 184 additions and 0 deletions
@@ -0,0 +1,16 @@
+CFLAGS=-D_LINUX_ -Wall -O2 -I../../
+LIBS=-lgpiod 
+
+all: pu_clock
+
+pu_clock: main.o bb_epaper.o
+	$(CXX) main.o bb_epaper.o $(LIBS) -o pu_clock 
+
+main.o: main.cpp
+	$(CXX) $(CFLAGS) -c main.cpp
+
+bb_epaper.o: ../../../src/bb_epaper.cpp ../../../src/bb_epaper.h
+	$(CXX) $(CFLAGS) -c ../../../src/bb_epaper.cpp
+
+clean:
+	rm -rf *.o pu_clock
@@ -0,0 +1,90 @@
+// Created with image_to_c
+// https://github.com/bitbank2/image_to_c
+//
+// Roboto_Black_78
+// Data size = 1262 bytes
+//
+// for non-Arduino builds...
+#ifndef PROGMEM
+#define PROGMEM
+#endif
+const uint8_t Roboto_Black_78[] PROGMEM = {
+	0xff,0xbb,0x30,0x00,0x3a,0x00,0xb3,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x4b,0x59,
+	0x70,0x00,0x07,0x00,0x93,0xff,0x6a,0x00,0x32,0x59,0x6d,0x00,0x0c,0x00,0x94,0xff,
+	0xa7,0x00,0x4e,0x59,0x6e,0x00,0x05,0x00,0x93,0xff,0x12,0x01,0x4f,0x59,0x70,0x00,
+	0x04,0x00,0x93,0xff,0x95,0x01,0x4f,0x59,0x6d,0x00,0x05,0x00,0x94,0xff,0xe9,0x01,
+	0x4c,0x59,0x6f,0x00,0x06,0x00,0x94,0xff,0x5d,0x02,0x4f,0x59,0x70,0x00,0x06,0x00,
+	0x93,0xff,0xe6,0x02,0x4e,0x59,0x6d,0x00,0x04,0x00,0x94,0xff,0x2c,0x03,0x4c,0x59,
+	0x70,0x00,0x06,0x00,0x93,0xff,0xb7,0x03,0x4c,0x59,0x70,0x00,0x06,0x00,0x93,0xff,
+	0x3b,0x04,0x1c,0x2e,0x55,0x00,0x09,0x00,0xad,0xff,0x28,0x3c,0x71,0xc9,0x27,0x34,
+	0x5f,0x04,0x0f,0x04,0x0f,0x09,0xe8,0x3c,0x20,0xf4,0xf4,0xf4,0xf4,0xf4,0xf4,0xf4,
+	0xff,0x4f,0x4f,0xf4,0xf9,0x8e,0xfe,0x82,0x0d,0xf0,0x83,0xe9,0x3f,0xdf,0x4f,0xa5,
+	0x7e,0xff,0xe9,0x3f,0xdf,0xff,0xf5,0xc6,0xfd,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+	0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xf5,0x20,0x35,0xef,0xff,0xff,0xad,
+	0xb5,0xff,0xd7,0x6e,0xbb,0x5f,0xf6,0xd2,0xe1,0x85,0xd8,0x61,0x2e,0x3d,0xaf,0xda,
+	0xda,0xfd,0xad,0xad,0xad,0xad,0xad,0xad,0xac,0x30,0xb6,0xb0,0xc2,0xc1,0x82,0xc1,
+	0x82,0xce,0x7c,0x74,0x28,0xbf,0x05,0x82,0xc1,0x60,0xb0,0xb0,0x58,0x2c,0x16,0x0b,
+	0x0b,0x05,0x82,0xc1,0x60,0xb0,0xb0,0x51,0xff,0xf3,0x2c,0xe0,0xb0,0x59,0xcc,0x36,
+	0x0b,0x05,0x95,0x2f,0x0b,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+	0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+	0x00,0x28,0x40,0x71,0xe8,0x67,0x36,0x67,0x04,0x0f,0x04,0x0f,0x08,0x3c,0x20,0xf4,
+	0xf0,0x83,0xd3,0xd3,0xd3,0xd3,0xd3,0xd7,0x4f,0x5d,0x3f,0xd3,0xe7,0x3c,0x23,0xa0,
+	0x83,0x7d,0x3e,0x93,0xf4,0xfd,0x3e,0x95,0xfb,0xff,0x15,0xfd,0x3f,0xff,0xff,0xca,
+	0x18,0xfa,0xfd,0x7f,0xad,0x7f,0x4b,0x5f,0xd2,0xd7,0xad,0x2d,0x74,0xba,0xd7,0x4b,
+	0x4b,0x5d,0x2d,0x2d,0x2e,0xb5,0xd2,0xd2,0xd2,0xd2,0xd2,0xd2,0xd2,0xd2,0xd2,0xd2,
+	0xd2,0xd2,0xd2,0xd2,0xd7,0x4b,0x4b,0xad,0x2d,0x2d,0x2d,0x74,0xb4,0xb4,0xb4,0xb4,
+	0xb4,0xb4,0x69,0x4a,0xb5,0xff,0xff,0xff,0xff,0xff,0xff,0x00,0x28,0x3e,0x72,0x08,
+	0x67,0x34,0x6b,0x04,0x74,0x26,0x20,0x83,0xc2,0x07,0x84,0x1e,0x13,0xd0,0x78,0x4f,
+	0x4f,0x4f,0x4f,0x4f,0xbd,0x74,0xfb,0xd7,0xbd,0x1d,0x00,0x8f,0x04,0x0f,0xa4,0xdf,
+	0x41,0xfa,0xfa,0x7e,0x9b,0xff,0x5f,0xdf,0x1f,0xff,0xff,0xf5,0xeb,0xf5,0xeb,0x5d,
+	0x2d,0x74,0xb0,0x4b,0x39,0xa5,0xdd,0x75,0xd7,0x5c,0x2e,0xb8,0x5d,0x75,0xc3,0xe1,
+	0xf0,0xfb,0xe1,0xf7,0xdf,0x7d,0xe7,0x56,0x7f,0x06,0xf0,0xde,0xfb,0x7b,0xef,0xde,
+	0xff,0xff,0xdf,0xbf,0x39,0x93,0xba,0xfe,0xeb,0x5b,0xf5,0x90,0x16,0xbd,0xa5,0xc3,
+	0x5d,0xb0,0xbc,0x18,0x25,0xb1,0xf5,0xbf,0x5b,0x5b,0x5d,0x6f,0xb0,0xb6,0xb0,0xd6,
+	0xd6,0x18,0x5b,0x0b,0x0d,0x60,0xc1,0x61,0x82,0xce,0x68,0xd6,0x73,0xe4,0x20,0x28,
+	0x56,0x73,0x23,0x2b,0xfa,0xeb,0xfa,0xfe,0xba,0xfe,0xba,0xfe,0xbf,0xae,0xbf,0xae,
+	0xbf,0xaf,0xeb,0xaf,0xeb,0xaf,0xeb,0xfa,0xeb,0xcc,0x50,0xf5,0xf4,0xbe,0xbd,0x7e,
+	0xbd,0x7d,0x2f,0xaf,0x5f,0x4b,0xff,0x4b,0xeb,0xd7,0xd2,0xff,0xd2,0xf5,0xfa,0xf4,
+	0xbf,0xf4,0xbd,0x7e,0xbd,0x2f,0x5f,0xaf,0x5f,0xaf,0x4b,0xd7,0xe2,0x64,0x86,0xa3,
+	0xff,0xc8,0x0f,0xff,0xfc,0xea,0xcc,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,0xff,
+	0xff,0xff,0xfc,0x28,0x12,0x08,0x7f,0xfe,0xbf,0xff,0xff,0xff,0xaf,0xff,0xff,0xff,
+	0x39,0x66,0x7f,0x5f,0xff,0xff,0xfe,0xb5,0xff,0xff,0xff,0xfd,0x23,0x8a,0x1b,0xe5,
+	0xc5,0x7c,0x10,0x3f,0x08,0x3e,0x21,0xf0,0xfb,0xef,0xbd,0x3e,0xfb,0xef,0xfb,0xef,
+	0xf4,0x73,0xa2,0x5e,0xc1,0x03,0xe7,0x10,0x48,0x3e,0x71,0x83,0x5b,0xce,0x40,0x43,
+	0xe6,0x28,0xdf,0x16,0xff,0xf7,0xfe,0xef,0xff,0xff,0xff,0xff,0x39,0xa3,0x3a,0xff,
+	0xa9,0x01,0xfd,0xaf,0xfd,0xa5,0xb7,0xf6,0xbd,0xa5,0xb6,0x17,0x83,0x09,0x6c,0x7d,
+	0x6f,0xb5,0xfb,0x5b,0x5b,0x5b,0x5b,0x5b,0x58,0x6b,0x6b,0x0c,0x2c,0x30,0xb0,0xc2,
+	0xc1,0x85,0x83,0x05,0x9c,0xf8,0xf8,0x28,0x64,0x71,0x84,0xa7,0x58,0x4b,0x3a,0x82,
+	0xd8,0x2e,0x17,0x05,0xc2,0xe1,0x75,0xc2,0xeb,0x85,0xd7,0x5d,0x75,0xd7,0x5d,0x74,
+	0x74,0xe6,0xe8,0xe9,0x0f,0xd0,0x2d,0x02,0xe1,0x68,0x2d,0x2e,0xb4,0xb8,0x5a,0xf5,
+	0xa5,0xd6,0x97,0xe9,0x7f,0x47,0x1c,0x33,0x53,0x8a,0x29,0xe0,0x83,0xe8,0x20,0xfc,
+	0x20,0xf5,0x4f,0xc2,0x7d,0x20,0xf8,0xbd,0x7b,0xef,0xbf,0xef,0xbf,0xee,0x39,0xd1,
+	0x88,0xc1,0x06,0xe1,0x07,0xa6,0xe9,0xe9,0xfe,0x9b,0xfd,0xff,0xf7,0xff,0xf9,0x01,
+	0xdf,0xff,0xff,0x5f,0xff,0xfe,0xff,0x6b,0xff,0xfb,0xa5,0xdf,0xeb,0xb7,0x5d,0xae,
+	0xda,0xf6,0x96,0xd8,0x5e,0x0c,0x25,0xb1,0xf5,0xb5,0xbf,0x5b,0x5b,0x5b,0x5b,0xed,
+	0x6c,0x2d,0xac,0x35,0xb0,0xb0,0xc2,0xc3,0x0b,0x06,0x16,0x0c,0x16,0x74,0x23,0xa0,
+	0xff,0xfe,0xba,0xe5,0x0c,0xfd,0x7e,0x97,0xe9,0x7e,0xbd,0x6b,0xd7,0xe9,0x7e,0xbd,
+	0x6b,0xd6,0xbf,0xa5,0xfd,0x6b,0xd6,0xbf,0xa5,0xfa,0x5f,0xa5,0xff,0xa5,0xfa,0x5f,
+	0xa5,0xfa,0xf5,0xaf,0x5f,0xa5,0xfa,0xf5,0xaf,0x5a,0xff,0x5a,0xf5,0xaf,0x5a,0xfe,
+	0x97,0xe9,0x7f,0x5a,0xfe,0x97,0xe9,0x7e,0x97,0xeb,0xd7,0xe9,0x7e,0xbd,0x6b,0xd6,
+	0xbd,0x6b,0xfd,0x6b,0xd6,0xb0,0x28,0x3e,0x71,0xe8,0xa7,0x34,0x67,0x39,0x64,0x38,
+	0x41,0xe1,0x07,0x84,0x1e,0x9e,0x10,0x7a,0x7a,0x7a,0x7a,0x7a,0x7f,0xa7,0xa7,0xfa,
+	0x7f,0xcc,0x7b,0xf4,0x10,0x6f,0xa7,0xe9,0xf4,0x9b,0xe9,0xff,0xff,0xa7,0xff,0xff,
+	0xff,0xff,0xff,0xff,0xed,0x77,0xaf,0xfb,0x5d,0xeb,0xb5,0xdb,0x4b,0xb5,0xd8,0x61,
+	0x2e,0x3d,0xad,0xad,0xad,0xad,0xad,0xac,0x30,0xb6,0xb6,0xb0,0x83,0xc2,0x0f,0x4f,
+	0x4f,0x09,0xe9,0xf7,0xa7,0xa7,0xa3,0x1e,0xef,0x40,0x81,0xfa,0x6f,0x49,0xfa,0x6f,
+	0x49,0xfa,0xbf,0x7d,0x7e,0x9b,0xff,0xff,0xf1,0xff,0xf2,0x03,0xff,0xb5,0xfe,0xd7,
+	0xfb,0x4b,0x6d,0x7b,0x5e,0xd7,0x60,0xc1,0x2e,0x3e,0xb7,0xda,0xfd,0xad,0xad,0xad,
+	0xad,0xad,0xad,0xad,0xac,0x30,0xb0,0xc2,0xc3,0x0b,0x06,0x0b,0x06,0x0b,0x39,0xf2,
+	0x10,0x28,0x40,0x71,0x89,0x27,0x36,0x5b,0x04,0x1e,0x10,0x3c,0x20,0xf0,0x9e,0x10,
+	0x7a,0x7a,0x7a,0x0f,0x4f,0x4f,0x5d,0x3d,0x3d,0x3f,0xd3,0xd3,0xe6,0x3d,0xba,0x08,
+	0x37,0xc2,0x0f,0xa4,0xdf,0xbe,0x97,0xd3,0x7f,0xe9,0x3f,0xdf,0x4f,0xff,0xf1,0xdf,
+	0xd7,0xfb,0xff,0x7f,0xfe,0xff,0xfb,0xc8,0x0f,0xfe,0xd7,0xf6,0xd7,0x6b,0xb5,0xc3,
+	0x0b,0x61,0x85,0xc7,0x7f,0x6b,0xf7,0xdf,0xf7,0xdf,0x7d,0xad,0x99,0x29,0xed,0x78,
+	0x6b,0xc3,0x09,0x2c,0x30,0xbc,0x30,0xbc,0xe6,0x85,0xf8,0xa5,0xfa,0x5f,0xae,0x97,
+	0xe9,0x6b,0xa5,0x85,0xd2,0xc2,0x58,0x2e,0x09,0x67,0x34,0x9b,0x39,0x15,0xdf,0xd7,
+	0x5d,0x75,0xd7,0x5c,0x2e,0xba,0xe1,0x70,0xba,0xe0,0xb8,0x5c,0x2e,0x72,0x8a,0xf3,
+	0x90,0x5f,0x9c,0x53,0x50,0x28,0x49,0xd2,0xe8,0x40,0xf0,0x9e,0x83,0xd3,0xd7,0x4f,
+	0xb8,0xff,0xb5,0xfc,0x80,0xfa,0xda,0xdf,0x6b,0x61,0x61,0xac,0x30,0x58,0xff,0xff,
+	0xff,0xff,0xff,0xff,0xff,0xff,0xfe,0x74,0xa7,0x08,0x1e,0x13,0xd0,0x7a,0x7a,0xe9,
+	0xf7,0x1f,0xf6,0xbf,0x90,0x1f,0x5b,0x5b,0xed,0x6c,0x2c,0x35,0x86,0x0a};
@@ -0,0 +1,78 @@
+//
+// C++ example for bb_epaper library
+// written by Larry Bank (bitbank@pobox.com)
+// This example shows how to do partial updates for any type of
+// black and white epaper display even if the original pixels are
+// lost (e.g. deep deep sleep or power failure)
+// The target display is a 400x300 4.2" B/W UC8151
+// You can easily select a different display by adjusting the
+// coordinates and using a different font size
+//
+// Project started 9/23/2024
+// Copyright (c) 2024 BitBank Software, Inc.
+//
+#include "../../../src/bb_epaper.h"
+#include "Roboto_Black_78.h"
+#include <time.h>
+BBEPAPER bbep(EPD42_400x300); // 4.2" UC81xx controller
+// 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
+struct tm myTime;
+time_t t;
+int iFrame = 0;
+
+void UpdateDisplay(int iFrame)
+{
+char szTemp[16];
+    bbep.fillScreen(BBEP_WHITE);
+    bbep.setFont(Roboto_Black_78);
+    bbep.setTextColor(BBEP_BLACK);
+    if (iFrame & 0xf) { // partial updates for 15 out of 16 frames
+        // write the old pixels (old time) into the old 1-bit plane
+	bbep.setPlane(PLANE_1);
+	sprintf(szTemp, "%02d:%02d", myTime.tm_hour, myTime.tm_min);
+	bbep.drawString(szTemp, 0, 200);
+	bbep.writePlane(PLANE_1);
+	bbep.setPlane(PLANE_0);
+	bbep.fillScreen(BBEP_WHITE);
+	t = time(NULL);
+	myTime = *localtime(&t);
+	sprintf(szTemp, "%02d:%02d", myTime.tm_hour, myTime.tm_min);
+	bbep.drawString(szTemp, 0, 200);
+	bbep.writePlane(PLANE_0); // write the new pixels
+	bbep.refresh(REFRESH_PARTIAL);
+    } else { // full update, just display the current time
+        t = time(NULL);
+	myTime = *localtime(&t);
+        sprintf(szTemp, "%02d:%02d", myTime.tm_hour, myTime.tm_min);
+	bbep.drawString(szTemp, 0, 200);
+	bbep.writePlane();
+	bbep.refresh(REFRESH_FULL);
+    }
+    bbep.sleep(DEEP_SLEEP); // extends the life of the display
+} /* UpdateDisplay() */
+
+int main(int argc, const char * argv[]) {
+
+  bbep.initIO(PIN_DC, PIN_RST, PIN_BUSY, PIN_CS, SPI_BUS, 8000000);
+  bbep.allocBuffer(); // Use RAM since we have plenty
+  while (1) { // loop forever
+      time_t tt;
+      struct tm testTime;
+
+      UpdateDisplay(iFrame++); // show the latest time
+      testTime.tm_min = myTime.tm_min;
+      // On a system with power saving features, you would sleep here
+      while (testTime.tm_min == myTime.tm_min) { // wait for minute to change
+          tt = time(NULL);
+          testTime = *localtime(&tt);
+      }
+  }
+  return 0; // it never gets here
+} /* main() */
+
+