Diff: PCA9635.cpp

Revision:

0:d9cc568daeaf

Child:

2:9ca6a4fbab5e

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9635.cpp	Tue Jun 28 10:03:49 2011 +0000
@@ -0,0 +1,103 @@
+//NXP PCA9635 library
+//mbed Team     -   1st June 2011
+//Ioannis Kedros 
+//updated by Daniel Worrall - 28th June 2011
+
+#include "mbed.h"
+#include "PCA9635.h"
+
+
+PCA9635::PCA9635(PinName sda, PinName scl, int addr) : m_i2c(sda, scl), m_addr(addr)     
+{
+    init(); 
+} 
+
+
+//Driver Software Reset
+void PCA9635::reset(void){
+    cmd[0] = 0x03;           
+    m_i2c.write(m_addr, cmd, 1); 
+}
+
+void PCA9635::init(void){
+    reset();
+
+    //Mode-1 Register: 
+    cmd[0] = 0x00;           
+    cmd[1] = 0x00; 
+    m_i2c.write(m_addr, cmd, 2);
+
+    //Mode-2 Register: 
+    cmd[0] = 0x01;           
+    cmd[1] = 0x22; 
+    m_i2c.write(m_addr, cmd, 2);
+    
+    //LED Registers into PWM Control
+    for(char i=0x14; i<0x18; i++)
+    {
+        cmd[0] = i;           
+        cmd[1] = 0xAA; 
+        m_i2c.write(m_addr, cmd, 2);
+    }
+}
+
+
+//Single LED On
+void PCA9635::on(char led)
+{
+    cmd[0] = led + 2;     //led position      
+    cmd[1] = 0xFF;        //brightness value
+    m_i2c.write(m_addr, cmd, 2);    
+}
+
+
+//Single LED Off
+void PCA9635::off(char led)
+{
+    cmd[0] = led + 2;     //led position  
+    cmd[1] = 0x00;        //brightness value
+    m_i2c.write(m_addr, cmd, 2);  
+}
+
+
+void PCA9635::bus(short leds)
+{
+    short temp = leds;          //check each bit of leds
+    bool stat = false;          //check LSB of temp
+    for(int j=0; j<16; j++) {
+        stat = (bool)(temp & 0x0001);
+        if(stat == true){       //set output accordingly
+            on(j);                
+        }
+        else {
+            off(j);
+        }
+        temp = (temp >> 1);     //bitwise shift right by 1 to scan next bit
+    }
+}
+
+//Brightness control for single or all LEDs
+void PCA9635::brightness(char led, char value)
+{
+    if(led == ALL)
+    {
+        for(char allLeds=0x02; allLeds<0x12; allLeds++)
+        {
+            cmd[0] = allLeds;           
+            cmd[1] = value; 
+            m_i2c.write(m_addr, cmd, 2);
+        }
+    }
+    else
+    {
+        cmd[0] = led + 2;           
+        cmd[1] = value; 
+        m_i2c.write(m_addr, cmd, 2);
+    }
+}
+
+
+
+
+
+