Diff: main.cpp

Revision:

2:9e757151de9b

Parent:

1:6484448034e3

Child:

3:4d612f16ad84

diff -r 6484448034e3 -r 9e757151de9b main.cpp
--- a/main.cpp	Thu Oct 18 13:09:21 2012 +0000
+++ b/main.cpp	Fri Oct 26 21:25:35 2012 +0000
@@ -1,137 +1,36 @@
-/*
- *   NXP LM75B temperature sensor test
- *   www.nxp.com/pip/LM75B_2.html
- *   
- *   Expecting to use the pins 9 and 10 for I2C bus
- *   these pins should be pulled-up properly. 
+/* Copyright (c) 2012 cstyles, MIT License
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software
+ * and associated documentation files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge, publish, distribute,
+ * sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
  *
- *   The temperature read out will be shown on terminal on the PC screen. 
- *   
- *   In this demo code, two LM75B devices can be driven. 
- *   These two devices should have different I2C address setting 
- *   using its address pins (LM75B's A0 to A2 (pins 5 to 7)). 
- *   One LM75B should have all those pins tied to GND. 
- *   And another should have the pin A0(pin7) pulled-up. 
+ * The above copyright notice and this permission notice shall be included in all copies or
+ * substantial portions of the Software.
  *
- *   From the software, those devices can be accessed by I2C addresses 
- *   "0x90" and "0x92". 
- *   It will not be as "0x90" and "0x91" because the address has 
- *   7 bit only and stuffed to left. So the "A0" setting become 0xX2. 
- *   The LSB does not care because it will be set by I2C libraly when 
- *   it transfer the data for read and write. 
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
+ * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  */
 
 #include "mbed.h"
-
-//  LM75B IIC address
-#define    LM75B_ADDR 0x90
-
-//  LM75B registers
-#define    Conf        0x01
-#define    Temp        0x00
-#define    Tos         0x03
-#define    Thyst       0x02
-
-
-DigitalOut    led[]            = { LED4, LED3, LED2, LED1 };
-Serial        pc(USBTX, USBRX); // tx, rx
-
-I2C           i2c( p28, p27 );        // sda, scl
-
-
-void   iic_write( char addr, char reg, char data );
-char   iic_read( char addr, char reg );
-short  iic_read_short( char addr, char reg );
-void   iic_error( void );
-
-void   init_temp_sensor( char dev_num );
-float  get_temp( char dev_num );
+#include "LM75B.h"
+#include "C12832_lcd.h"
 
-int main() {
-    int    i;
-    
-    init_temp_sensor( 0 );
-
-    while(1) {
-        pc.printf( "  (%d)  temp[0]=%6.3f, \n", i++, get_temp( 0 ) );
-        wait( 1 );
-    }
-}
+C12832_LCD lcd;
+LM75B tmp(p28,p27);
 
-void init_temp_sensor( char dev_num )
-{
-    dev_num    <<= 1;    
-    iic_write( LM75B_ADDR | dev_num, Conf, 0x00 );    //    configuration
-    pc.printf( "sensor[%d] : Conf  register read out = 0x%02X\n", dev_num, iic_read( LM75B_ADDR | dev_num, Conf ) );
-    pc.printf( "sensor[%d] : Tos   register read out = 0x%04X\n", dev_num, iic_read_short( LM75B_ADDR | dev_num, Tos ) );
-    pc.printf( "sensor[%d] : Thyst register read out = 0x%04X\n", dev_num, iic_read_short( LM75B_ADDR | dev_num, Thyst ) );
-}
-
-
-float get_temp( char dev_num )
-{
-    dev_num    <<= 1;
-
-    return ( (float)(iic_read_short( LM75B_ADDR | dev_num, Temp )) / 256.0 );
-}
-
-void iic_write( char addr, char reg, char data )
+int main ()
 {
-    char cmd[2];
-    
-    cmd[ 0 ]    = reg;
-    cmd[ 1 ]    = data;
-    
-    if ( i2c.write( addr, cmd, 2) )
-        iic_error();        
-}
-
-char iic_read( char addr, char reg )
-{
-    char cmd;
-    int nack;
-
-    cmd    = reg;
-   
-    nack     = i2c.write( addr, &cmd, 1); // Send command string
-    nack    |= i2c.read( addr, &cmd, 1); // Send command string
-    
-    if ( nack )
-        iic_error();        
-    
-    return ( cmd );
-}
-
 
-short iic_read_short( char addr, char reg )
-{
-    char cmd[ 2 ];
-    int nack;
-
-    cmd[ 0 ]    = reg;
-   
-    nack     = i2c.write( addr, cmd, 1); // Send command string
-    nack    |= i2c.read( addr, cmd, 2); // Send command string
-    
-    if ( nack )
-        iic_error();        
-
-    return ( ((short)cmd[ 0 ]) << 8 | cmd[ 1 ] );
-}
+    while (1) {
+        lcd.cls();
+        lcd.locate(0,3);
+        lcd.printf("%.2f\n",tmp.read());
+        wait(1.0);
+    }
 
-
-void iic_error( void )
-{
-    pc.printf( "I2C error\n" );
-
-    for ( int i = 0; i < 4; i++ )
-        led[ i ]    = i & 0x01;
-    
-    wait ( 0.2 );
-    
-    for ( int i = 0; i < 4; i++ )
-        led[ i ]    = !(i & 0x01);
-        
-    wait ( 0.2 );
 }
-