Diff: main.cpp

Revision:

0:6703a60ee9d0

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue May 12 14:04:47 2015 +0000
@@ -0,0 +1,56 @@
+#include "mbed.h"
+
+//Just a couple of the outputs directly accessible for debug
+DigitalIn O0(p14);/*
+DigitalIn O1(p15);
+DigitalIn O2(p16);
+DigitalIn O3(p20);*/
+DigitalIn O4(p19);/*
+DigitalIn O5(p18);
+DigitalIn O6(p17);
+DigitalIn O7(p21);*/
+
+DigitalOut CE(p22);
+DigitalOut OE(p24);
+
+Serial pc(USBTX, USBRX);
+
+DigitalOut led1(LED1);
+DigitalOut led2(LED2);
+DigitalOut led3(LED3);
+DigitalOut led4(LED4);
+BusIn epromdata(p14,p15,p16,p20,p19,p18,p17,p21);
+BusOut addressline(p13,p12,p11,p10,p9,p8,p7,p6,p27,p26,p23,p25,p5,p28);
+
+
+int main() {
+    //CE and OE lines are inverted
+    CE=1;
+    OE=1;
+    //Give me some time to set up a pipe into a file
+    wait(8);
+    
+    int num=16384; //number of addresses
+    char epromcontents[num]; //char array to store data words
+    for (int addr=0;addr<num;addr++){
+        addressline=addr; //set the address
+        CE=0;//clock the chip
+        OE=0;
+        wait(1e-6); //wait a generous 1000ns
+        epromcontents[addr]=epromdata.read(); //then read the data into the array
+        //just as a sanity check, send two of the data lines to LEDs 1 and 2
+        led1=O0;
+        led2=O4;
+        //bring the clock lines back up and wait for the output to go back into tristated mode        
+        CE=1;
+        OE=1;
+        wait(1e-6);
+        
+    }
+    //led3 goes on to say we're done
+    led3=1;
+for(int i=0;i<num;i++)
+pc.printf("%d\n",epromcontents[i]);//send each byte over usbserial
+led4=1;//to say we're done sending
+}
+