John Larkin / TextLCD

TextLCD library for controlling various LCD panels based on the HD44780 4-bit interface. Updated for Mbed OS 6.

Files at this revision

API Documentation at this revision

Revision 9:d3875959a370, committed 2021-01-10

Comitter:
JLarkin
Date:
Sun Jan 10 20:28:36 2021 +0000
Parent:
8:308d188a2d3a
Commit message:
Updated for Mbed OS 6: short wait to wait_us and long wait to sleep_for

Changed in this revision

TextLCD.cpp Show annotated file Show diff for this revision Revisions of this file
TextLCD.h Show annotated file Show diff for this revision Revisions of this file 
diff -r 308d188a2d3a -r d3875959a370 TextLCD.cpp
--- a/TextLCD.cpp	Thu Jan 02 21:07:01 2014 +0000
+++ b/TextLCD.cpp	Sun Jan 10 20:28:36 2021 +0000
@@ -1,4 +1,13 @@
 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2021 jlarkin, <jlarkin@whitworth.edu>
+ *
+ * Modified for compatibility under Mbed OS 6
+ *   - explicit import of Stream.h
+ *   - wait statements longer than 1 ms converted to ThisThread::sleep_for
+ *     and rounded up to nearest ms
+ *   - wait statements shorter than 1 ms converted to wait_us
+ * 
+ * A fork of Simon Ford's mbed TextLCD library
  * Copyright (c) 2007-2010, sford, http://mbed.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -31,15 +40,15 @@
     _e  = 1;
     _rs = 0;            // command mode
 
-    wait(0.015);        // Wait 15ms to ensure powered up
+    ThisThread::sleep_for(15ms);        // Wait 15ms to ensure powered up
 
     // send "Display Settings" 3 times (Only top nibble of 0x30 as we've got 4-bit bus)
     for (int i=0; i<3; i++) {
         writeByte(0x3);
-        wait(0.00164);  // this command takes 1.64ms, so wait for it
+        ThisThread::sleep_for(2ms);  // this command takes 1.64ms, so wait for it
     }
     writeByte(0x2);     // 4-bit mode
-    wait(0.000040f);    // most instructions take 40us
+    wait_us(40);        // most instructions take 40us
 
     writeCommand(0x28); // Function set 001 BW N F - -
     writeCommand(0x0C);
@@ -55,7 +64,7 @@
 
 void TextLCD::cls() {
     writeCommand(0x01); // cls, and set cursor to 0
-    wait(0.00164f);     // This command takes 1.64 ms
+    ThisThread::sleep_for(2ms);     // This command takes 1.64 ms
     locate(0, 0);
 }
 
@@ -91,14 +100,14 @@
 
 void TextLCD::writeByte(int value) {
     _d = value >> 4;
-    wait(0.000040f); // most instructions take 40us
+    wait_us(40); // most instructions take 40us
     _e = 0;
-    wait(0.000040f);
+    wait_us(40);
     _e = 1;
     _d = value >> 0;
-    wait(0.000040f);
+    wait_us(40);
     _e = 0;
-    wait(0.000040f);  // most instructions take 40us
+    wait_us(40);  // most instructions take 40us
     _e = 1;
 }
 

diff -r 308d188a2d3a -r d3875959a370 TextLCD.h
--- a/TextLCD.h	Thu Jan 02 21:07:01 2014 +0000
+++ b/TextLCD.h	Sun Jan 10 20:28:36 2021 +0000
@@ -1,4 +1,13 @@
 /* mbed TextLCD Library, for a 4-bit LCD based on HD44780
+ * Copyright (c) 2021 jlarkin, <jlarkin@whitworth.edu>
+ *
+ * Modified for compatibility under Mbed OS 6
+ *   - explicit import of Stream.h
+ *   - wait statements longer than 1 ms converted to ThisThread::sleep_for
+ *     and rounded up to nearest ms
+ *   - wait statements shorter than 1 ms converted to wait_us
+ * 
+ * A fork of Simon Ford's mbed TextLCD library
  * Copyright (c) 2007-2010, sford, http://mbed.org
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy
@@ -23,7 +32,8 @@
 #ifndef MBED_TEXTLCD_H
 #define MBED_TEXTLCD_H
 
-#include "mbed.h"
+#include <mbed.h>
+#include <platform/Stream.h>
 
 /**  A TextLCD interface for driving 4-bit HD44780-based LCDs
  *