merged experimental code into master branch

Author: Laurence Bank

examples/obd_cmd_demo/obd_cmd_demo.ino

@@ -0,0 +1,46 @@
+//
+// OneBitDisplay command example
+// shows how to create and play back a buffer of bytewise display commands
+// written by Larry Bank 1/23/2022
+//
+#include <OneBitDisplay.h>
+OBDISP obd, obdCMD;
+uint8_t ucBuffer[1024], ucBackBuffer[1024];
+// 16x16 X image
+uint8_t ucSprite[32] = {0x80,0x01,0x40,0x02,0x20,0x04,0x10,0x08,
+                        0x08,0x10,0x04,0x20,0x02,0x40,0x01,0x80,
+                        0x01,0x80,0x02,0x40,0x04,0x20,0x08,0x10,
+                        0x10,0x08,0x20,0x04,0x40,0x02,0x80,0x01};
+void setup() {
+  int rc;
+  char szTemp[32];
+//  int obdI2CInit(OBDISP *pOBD, int iType, int iAddr, int bFlip, int bInvert, int bWire, int iSDAPin, int iSCLPin, int iResetPin, int32_t iSpeed);
+  rc = obdI2CInit(&obd, OLED_128x64, -1, 0, 0, 1, -1, -1, -1, 800000);
+  obdSetBackBuffer(&obd, ucBackBuffer);
+  obdFill(&obd, 0, 1);
+  memset(&obdCMD, 0, sizeof(obdCMD)); // ready for commands
+  obdSetBackBuffer(&obdCMD, ucBuffer); // give it a memory space to save the commands
+  
+  obdWriteString(&obd, 0,0,0, (char *)"OBD Command test", FONT_8x8, 0, 1);
+  obdWriteString(&obd, 0,0,1, (char *)"Executing...", FONT_8x8, 0, 1);
+  obdFill(&obdCMD, 0, 1);
+  obdWriteString(&obdCMD, 0,0,0,(char *)"The OBD lib functions", FONT_6x8, 0, 1);
+  obdWriteString(&obdCMD, 0,0,1,(char *)"become byte codes", FONT_6x8, 0, 1);
+  obdWriteString(&obdCMD, 0,0,2,(char *)"written into memory", FONT_6x8, 0, 1);
+  obdWriteString(&obdCMD, 0,0,3,(char *)"and then played back", FONT_6x8, 0, 1);
+  obdEllipse(&obdCMD, 32, 48, 31, 15, 1, 1);
+  obdEllipse(&obdCMD, 32, 48, 15, 12, 0, 1);
+  obdDrawSprite(&obdCMD, ucSprite, 16, 16, 2, 96,40, 1);
+//  obdEllipse(&obdCMD, 96, 48, 31, 15, 1, 1);
+//  obdEllipse(&obdCMD, 96, 48, 15, 12, 0, 1);
+  sprintf(szTemp, "%d bytes generated", obdGetCommandLen(&obdCMD));
+  obdWriteString(&obd, 0,0,2, szTemp, FONT_6x8, 0, 1);
+  delay(4000);
+  obdExecCommands(ucBuffer, obdGetCommandLen(&obdCMD), &obd, 0);
+  obdDumpBuffer(&obd, NULL);
+} /* setup() */
+
+void loop() {
+  // put your main code here, to run repeatedly:
+
+}