Diff: main.cpp

Revision:

0:5918d7a4ad04

Child:

1:abeac322d8d8

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Tue Jan 07 14:12:18 2014 +0000
@@ -0,0 +1,66 @@
+#include "mbed.h"
+
+Serial async_port(p9, p10);          //set up TX and RX on pins 9 and 10
+DigitalOut red_led(LED4);             //red led
+DigitalOut green_led(LED3);           //green led
+DigitalOut RXDIN (LED1);
+DigitalOut strobe(p7);               //a strobe to trigger the scope
+DigitalIn switch_ip1(p5);
+DigitalIn switch_ip2(p6);
+
+char switch_word ;                   //the word we will send
+char recd_val;                       //the received value 
+int valueADC;
+char Outbuff[2];
+char Inbuff[2];
+  
+int main() {
+  async_port.baud(9600);             //set baud rate to 9600 (ie default)
+  //accept default format, of 8 bits, no parity
+  while (1){
+    //Set up the word to be sent, by testing switch inputs
+    switch_word=0xa0;                 //set up a recognisable output pattern
+    if (switch_ip1==1)
+      switch_word=switch_word|0x01;   //OR in lsb
+    if (switch_ip2==1)
+      switch_word=switch_word|0x02;   //OR in next lsb
+    strobe =1;                        //short strobe pulse 
+    wait_us(10);
+    strobe=0;
+    valueADC = 0x0302;
+    Outbuff[0] = valueADC;
+    Outbuff[1] = valueADC >> 8;
+    
+    while (async_port.writeable()==0);  //is there a place to write?
+    async_port.putc(Outbuff[1]);     //transmit switch_word
+    while (async_port.writeable()==0);  //is there a place to write?
+    async_port.putc(Outbuff[0]);     //transmit switch_word
+    while (async_port.writeable()==0);  //is there a place to write?
+    async_port.putc(switch_word);     //transmit switch_word
+    if (async_port.readable()==1){     //is there a character to be read?
+      Inbuff[1] = async_port.getc();     //if yes, t
+      }
+    if (async_port.readable()==1){     //is there a character to be read?
+      Inbuff[0] = async_port.getc();     //if yes, t
+      }  
+    if (async_port.readable()==1){     //is there a character to be read?
+      recd_val=async_port.getc();     //if yes, t
+      RXDIN = 1;
+      }
+    wait(0.01);
+//set leds according to incoming word from slave
+    red_led=0;              //preset both to 0
+    green_led=0; 
+    recd_val=recd_val&0x03; //AND out unwanted bits
+    if (recd_val==1)
+      red_led=1;
+    if (recd_val==2)
+      green_led=1;
+    if (recd_val==3){
+      red_led=1;
+      green_led=1;
+    }
+    wait(0.5);
+    RXDIN = 0;
+  }    
+}