Diff: main.cpp

Revision:

0:0c5df109fd61

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Thu Nov 11 21:26:28 2010 +0000
@@ -0,0 +1,138 @@
+#include "mbed.h"
+
+/*******************************************************************************
+* Module:     BUSI2C.cpp
+* Function:   Controleur de bus I2C por un driver de glcd128x128
+* Author:     Belloula AbdelMalek [31.10.2010]
+*******************************************************************************/
+#include "mbed.h"
+
+I2C i2c(p9, p10); // sda, scl
+//char RD_CMD = 0xF9;
+//char WR_CMD = 0xFA;
+//char RD_DATA = 0xF1;
+//char WR_DATA = 0xF7;
+//char SET = 0xFF;
+//char RESET = 0xEF;
+
+unsigned int adress_PCFcmd = 0x40;
+unsigned int adress_PCFdata = 0x42;
+
+char cmd[10]={0xF7,0xFA,0xF9,0xF1,0xF2,0xFF,0xEF};
+char data[5];
+
+Serial pc(USBTX, USBRX); // tx, rx
+
+
+void reset_lcd_chip(void) /* reset the LCD controller chip */
+    {       
+        i2c.write(adress_PCFcmd,cmd+6, 1); // cmd [1] = 0xEF
+        wait(0.05);
+       	i2c.write(adress_PCFdata,cmd+5, 1);    // cmd [0] = 0xFF
+    }
+
+void lcd_busy_wait(void)// status check
+ {       
+    do
+    {
+        i2c.write(adress_PCFcmd,cmd+2, 1);  // cmd [2] = 0xF9
+        i2c.read(adress_PCFdata,data, 1);   // data 
+        i2c.write(adress_PCFcmd,cmd+5, 1);  // cmd [0] = 0xFF
+    }
+    while((data[0] & 0x03) != 0x03);        /* wait till STA1=1 && STA0=1 */
+    
+ }
+
+ void  write_data_byte (void) // Procedure for sending a data
+    {
+        lcd_busy_wait(); 		                // status check
+        i2c.write(adress_PCFcmd,cmd, 1);        // cmd [2] = 0xF7
+        i2c. write (adress_PCFdata,data, 1);    // data 
+        i2c.write(adress_PCFcmd,cmd+4, 1);      // cmd [2] = 0xF2
+        i2c.write(adress_PCFcmd,cmd, 1);        // cmd [2] = 0xF7
+        i2c.write(adress_PCFcmd,cmd+5, 1);      // cmd [2] = 0xFF
+    }
+
+ void  write_cmd_byte (void) // Procedure for sending a command;
+    {
+        lcd_busy_wait(); // status check
+        i2c. write (adress_PCFdata,data, 1);   //data  (commande)
+        i2c.write(adress_PCFcmd,cmd+4, 1);  // cmd [x] = 0xF2
+        i2c.write(adress_PCFcmd,cmd, 1);  // cmd [x] = 0xF7
+        i2c.write(adress_PCFcmd,cmd+5, 1);  // cmd [x] = 0xFF
+    }
+
+
+
+int main() 
+{
+    int count = 0;
+    //Scan for I2C slave devices (0 => no slave found !0 => address of the slaved device found )
+    printf("I2CU! Searching for I2C devices...\n");
+    for (int address=0; address<256; address+=2)   
+    {
+        if (!i2c.write(address, NULL, 0)) 
+            { // 0 returned is ok
+                printf(" - I2C device found at address 0x%02X\n", address);
+                count++;
+            }
+    }
+    printf("%d devices found\n", count);
+    
+    reset_lcd_chip();
+    
+    lcd_busy_wait();
+    data[0]= 0x00;
+    write_data_byte();
+   
+    lcd_busy_wait();
+    data[0]= 0x00;
+    write_data_byte();
+    
+    lcd_busy_wait();
+    data[0]= 0x42;
+    write_cmd_byte();
+    
+    lcd_busy_wait();
+    data[0]= 0x00;
+    write_data_byte();
+   
+    lcd_busy_wait();
+    data[0]= 0x10;
+    write_data_byte();
+    
+    lcd_busy_wait();
+    data[0]= 0x43;
+    write_cmd_byte();
+    
+    
+    lcd_busy_wait();
+    data[0]= 0x98;
+    write_cmd_byte();
+    
+    lcd_busy_wait();
+    data[0]= 0x00;
+    write_data_byte();
+   
+    lcd_busy_wait();
+    data[0]= 0x00;
+    write_data_byte();
+    
+    lcd_busy_wait();
+    data[0]= 0x24;
+    write_cmd_byte();
+    
+   /*
+    data_write
+    i2c.write(adress_PCF8574,cmd[4], 1);/0xF7
+    i2c.writ(adress_PCF8574+2,data, 1);
+    i2c.write(adress_PCF8574,cmd[4]& 0xF2, 1);
+    i2c.write(adress_PCF8574,cmd[4]& 0xF7, 1);
+    i2c.write(adress_PCF8574,cmd[0], 1);
+   
+    */
+   
+  
+
+}
+