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--- en:odroid-c-io [2014/12/06 19:07]
odroid
+++ en:odroid-c-io [2014/12/06 19:12] (current)
odroid
@@ Line 1: / Line 1: @@
+=== ODROID-C1 16x2 LCD + IO Shield ===
+<code>
+//------------------------------------------------------------------------------------------------------------
+//
+// ODROID-C 16x2 LCD / LED / Button Test Application.
+//
+// Defined port number is wiringPi port number.
+//
+// Compile : gcc -o <create excute file name> <source file name> -lwiringPi -lwiringPiDev -lpthread
+// Run : sudo ./<created excute file name>
+//
+//------------------------------------------------------------------------------------------------------------
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <time.h>
+#include <wiringPi.h>
+#include <wiringPiI2C.h>
+#include <wiringSerial.h>
+#include <lcd.h>
+//------------------------------------------------------------------------------------------------------------
+//
+// Global handle Define
+//
+//------------------------------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------------------------------
+//
+// LCD:
+//
+//------------------------------------------------------------------------------------------------------------
+#define LCD_ROW             2   // 16 Char
+#define LCD_COL             16  // 2 Line
+#define LCD_BUS             4   // Interface 4 Bit mode
+#define LCD_UPDATE_PERIOD   300 // 300ms
+static unsigned char lcdFb[LCD_ROW][LCD_COL] = {0, };
+static int lcdHandle  = 0;
+static int lcdDispPos = 0;
+#define PORT_LCD_RS     7   // GPIOY.BIT3(#83)
+#define PORT_LCD_E      0   // GPIOY.BIT8(#88)
+#define PORT_LCD_D4     2   // GPIOX.BIT19(#116)
+#define PORT_LCD_D5     3   // GPIOX.BIT18(#115)
+#define PORT_LCD_D6     1   // GPIOY.BIT7(#87)
+#define PORT_LCD_D7     4   // GPIOX.BIT7(#104)
+const unsigned char lcdDispString[LCD_ROW][LCD_COL] = {
+    //1234567890123456
+     " Hello! ODROID! ",
+     " - HardKernel - ",
+};
+//------------------------------------------------------------------------------------------------------------
+//
+// Button:
+//
+//------------------------------------------------------------------------------------------------------------
+#define PORT_BUTTON1    5   // GPIOX.BIT5(#102)
+#define PORT_BUTTON2    6   // GPIOX.BIT6(#103)
+//------------------------------------------------------------------------------------------------------------
+//
+// LED:
+//
+//------------------------------------------------------------------------------------------------------------
+static int ledPos = 0;
+const int ledPorts[] = {
+, // GPIOX.BIT4(#101)
+, // GPIOX.BIT3(#100)
+, // GPIOX.BIT11(#108):PWM_B
+, // GPIOX.BIT0(#97)
+, // GPIOX.BIT21(#118)
+, // GPIOX.BIT2(#99)
+, // GPIOX.BIT1(#98)
+};
+#define MAX_LED_CNT sizeof(ledPorts) / sizeof(ledPorts[0])
+//------------------------------------------------------------------------------------------------------------
+//------------------------------------------------------------------------------------------------------------
+//
+// LCD Update Function:
+//
+//------------------------------------------------------------------------------------------------------------
+static void lcd_update (void)
+{
+    int i, j;
+    memset((void *)&lcdFb, ' ', sizeof(lcdFb));
+    if(lcdDispPos)    lcdDispPos %= LCD_COL;
+    // LCD Display Shift
+    if(lcdDispPos < 0)  {
+        strncpy(&lcdFb[0][abs(lcdDispPos)], &lcdDispString[0][0], LCD_COL - abs(lcdDispPos));
+        strncpy(&lcdFb[1][abs(lcdDispPos)], &lcdDispString[1][0], LCD_COL - abs(lcdDispPos));
+    }
+    else    {
+        strncpy(&lcdFb[0][0], &lcdDispString[0][lcdDispPos], LCD_COL - lcdDispPos);
+        strncpy(&lcdFb[1][0], &lcdDispString[1][lcdDispPos], LCD_COL - lcdDispPos);
+    }
+    for(i = 0; i < LCD_ROW; i++)    {
+        lcdPosition (lcdHandle, 0, i);
+        for(j = 0; j < LCD_COL; j++)    lcdPutchar(lcdHandle, lcdFb[i][j]);
+    }
+}
+//------------------------------------------------------------------------------------------------------------
+//
+// system init
+//
+//------------------------------------------------------------------------------------------------------------
+int system_init(void)
+{
+    int i;
+    // LCD Init
+    lcdHandle = lcdInit (LCD_ROW, LCD_COL, LCD_BUS,
+                         PORT_LCD_RS, PORT_LCD_E,
+                         PORT_LCD_D4, PORT_LCD_D5, PORT_LCD_D6, PORT_LCD_D7, 0, 0, 0, 0);
+    if(lcdHandle < 0)   {
+        fprintf(stderr, "%s : lcdInit failed!\n", __func__);    return -1;
+    }
+    // GPIO Init(LED Port ALL Output)
+    for(i = 0; i < MAX_LED_CNT; i++)    {
+        pinMode (ledPorts[i], OUTPUT);  pullUpDnControl (PORT_BUTTON1, PUD_OFF);
+    }
+    // Button Pull Up Enable.
+    pinMode (PORT_BUTTON1, INPUT);    pullUpDnControl (PORT_BUTTON1, PUD_UP);
+    pinMode (PORT_BUTTON2, INPUT);    pullUpDnControl (PORT_BUTTON2, PUD_UP);
+    return  0;
+ }
+//------------------------------------------------------------------------------------------------------------
+//
+// board data update
+//
+//------------------------------------------------------------------------------------------------------------
+void boardDataUpdate(void)
+{
+    int i;
+    //  LED Control
+    for(i = 0; i < MAX_LED_CNT; i++)    digitalWrite (ledPorts[i], 0); // LED All Clear
+    digitalWrite(ledPorts[ledPos++], 1);
+    if(ledPos)  ledPos %= MAX_LED_CNT;
+    // button status read
+    if(!digitalRead (PORT_BUTTON1)) lcdDispPos++;
+    if(!digitalRead (PORT_BUTTON2)) lcdDispPos--;
+}
+//------------------------------------------------------------------------------------------------------------
+//
+// Start Program
+//
+//------------------------------------------------------------------------------------------------------------
+int main (int argc, char *argv[])
+{
+    int timer = 0 ;
+    wiringPiSetup ();
+    if (system_init() < 0)
+    {
+        fprintf (stderr, "%s: System Init failed\n", __func__);     return -1;
+    }
+    for(;;)    {
+        if (millis () < timer)  continue ;
+        timer = millis () + LCD_UPDATE_PERIOD;
+        // All Data update
+        boardDataUpdate();
+        // lcd update
+        lcd_update();
+    }
+    return 0 ;
+}
+</code>