Diff: PCA9535.cpp

Revision:

0:709fd4a24068

diff -r 000000000000 -r 709fd4a24068 PCA9535.cpp
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PCA9535.cpp	Fri Jan 22 08:48:46 2016 +0000
@@ -0,0 +1,56 @@
+#include "PCA9535.h"
+
+extern Serial dbg;
+
+PCA9535::PCA9535(PinName sda, PinName scl):i2c(sda, scl)
+{
+    i2c.frequency(PCA9535_FREQ);
+}
+
+PCA9535::~PCA9535()
+{
+    
+}
+
+bool PCA9535::configure(char pin1, char pin2)
+{
+    char data1 = pin1;
+    char data2 = pin2;
+    
+    char buffer[3];
+    
+    buffer[0] = 0x06;
+    buffer[1] = data1;
+    buffer[2] = data2;
+    
+    dbg.printf("%.2X %.2X %.2X\r\n", buffer[0], buffer[1], buffer[2]);
+    if(i2c.write(ADDR, buffer, 3) != 0)return 0;
+    
+    return 1;
+}
+
+bool PCA9535::write(char pin1, char pin2)
+{
+    char buffer[3];
+    buffer[0] = 0x02;
+    buffer[1] = pin1;
+    buffer[2] = pin2;
+    
+    dbg.printf("%.2X %.2X %.2X\r\n", buffer[0], buffer[1], buffer[2]);
+    if(i2c.write(ADDR, buffer, 3) != 0)return 0;
+    
+    return 1;
+}
+
+int PCA9535::read()
+{
+    char start = 0x00;
+    char buffer[2];
+    
+    if(i2c.write(ADDR, &start, 1) != 0)return 0;
+    if(i2c.read(ADDR, buffer, 2) != 0)return 0;
+    
+    int val = (int) (buffer[0] * 256) + buffer[1];
+    
+    return val;
+}
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