From 8462e8ce52a63af0d735b6ff605fc8ed27859716 Mon Sep 17 00:00:00 2001
From: Jon Trulson <jtrulson@ics.com>
Date: Thu, 9 Jul 2015 14:12:20 -0600
Subject: [PATCH] jhd1313m1: add createChar() method, as it should be supported
 by this device

Signed-off-by: Jon Trulson <jtrulson@ics.com>
Signed-off-by: Mihai Tudor Panu <mihai.tudor.panu@intel.com>
---
 src/lcd/jhd1313m1.cxx | 15 +++++++++++++++
 src/lcd/jhd1313m1.h   |  9 +++++++++
 2 files changed, 24 insertions(+)

diff --git a/src/lcd/jhd1313m1.cxx b/src/lcd/jhd1313m1.cxx
index 398a8a1a..86e8b636 100644
--- a/src/lcd/jhd1313m1.cxx
+++ b/src/lcd/jhd1313m1.cxx
@@ -125,6 +125,21 @@ Jhd1313m1::scroll(bool direction)
     }
 }
 
+mraa_result_t
+Jhd1313m1::createChar(uint8_t charSlot, uint8_t charData[])
+{
+    mraa_result_t error = MRAA_SUCCESS;
+    charSlot &= 0x07; // only have 8 positions we can set
+    error = m_i2c_lcd_control.writeReg(LCD_CMD, LCD_SETCGRAMADDR | (charSlot << 3));
+    if (error == MRAA_SUCCESS) {
+        for (int i = 0; i < 8; i++) {
+            error = m_i2c_lcd_control.writeReg(LCD_DATA, charData[i]);
+        }
+    }
+
+    return error;
+}
+
 /*
  * **************
  *  virtual area
diff --git a/src/lcd/jhd1313m1.h b/src/lcd/jhd1313m1.h
index bd8a5f4e..687a3109 100644
--- a/src/lcd/jhd1313m1.h
+++ b/src/lcd/jhd1313m1.h
@@ -111,6 +111,15 @@ class Jhd1313m1 : public LCD
      */
     mraa_result_t home();
 
+    /**
+     * Create a custom character
+     *
+     * @param charSlot the character slot to write, only 8 are available
+     * @param charData The character data (8 bytes) making up the character
+     * @return Result of operation
+     */
+    mraa_result_t createChar(uint8_t charSlot, uint8_t charData[]);
+
   private:
     int m_rgb_address;
     mraa::I2c m_i2c_lcd_rgb;