Diff: main.cpp

Revision:

0:4e50b868c5dc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Wed Jan 08 00:39:28 2014 +0000
@@ -0,0 +1,56 @@
+//Author: Kuldip Maharjan
+//Email : kuldipmaharjan@gmail.com
+//Anyone can use this code if it helps in their projects or 
+//for learning programing in mbed besides for commercial purposes
+
+
+// This code does some basic stuff with an 24LC256 memory chip
+
+#include "mbed.h"
+
+I2C i2c(p28, p27);  // sda, scl
+//DigitalOut wp(p29); // write protect
+
+int main()
+{
+    //wp = 0; // disable write protect
+    printf("Writing bytes 0-16\n");
+
+    char data[3];
+    for(int i=0; i<16; i++) {
+        data[0] = 0;     // MSB address
+        data[1] = i;     // LSB address
+        data[2] = i * 3; // data
+        if(i2c.write(0xA0, data, 3)) {
+            error("Write failed\n");
+        }
+        while(i2c.write(0xA0, NULL, 0)); // wait to complete
+    }
+
+    data[0] = 0;       // MSB address
+    data[1] = 255;     // LSB address
+    data[2] = 'A';     // data
+    if(i2c.write(0xA0, data, 3)) {
+        error("Write failed\n");
+    }
+    while(i2c.write(0xA0, NULL, 0)); // wait to complete
+
+    printf("Setting read pointer to 0\n");
+
+    data[0] = 0;                   // MSB address
+    data[1] = 0;                   // LSB address
+    if(i2c.write(0xA0, data, 2)) { // send address, but no data
+        error("Write failed\n");
+    }
+
+    printf("Reading back data bytes 0-16\n");
+    
+    char response[1];
+    for(int i=0; i<256; i++) {
+        if(i2c.read(0xA0, response, 1)) {
+            error("Read failed\n");
+        }
+        printf("address %03d = 0x%02X\n", i, response[0]);
+    }
+
+}