Roman Valencia
reading a group of switches or one only
Dependencies: Hotboards_switches mbed
Revision 0:03e6fa9721e8, committed 2016-03-02
- Comitter:
- RomanValenciaP
- Date:
- Wed Mar 02 20:33:31 2016 +0000
- Child:
- 1:5a47f2b970eb
- Commit message:
- first release - recquires approval
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/Hotboards_switches.lib Wed Mar 02 20:33:31 2016 +0000 @@ -0,0 +1,1 @@ +http://developer.mbed.org/users/Hotboards/code/Hotboards_switches/#dfb1302f847d
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed Mar 02 20:33:31 2016 +0000
@@ -0,0 +1,70 @@
+
+/*
+ * Read the value from 4 sw's (dip switch) and also read the value from a single sw.
+ */
+
+#include "mbed.h"
+#include "Hotboards_switches.h"
+
+// Creates two sw objects, this interrupt will give us a LOW(0) value when close
+// because our dip switch works with pull-ups.
+Hotboards_switches dip1( PA_9 , PA_8 , PB_10 , PB_4 );
+Hotboards_switches sw1( PA_6 );
+// If your dip switch will gave you a HIGH(1) value when close, then we need to create
+// the sw object with an extra parameter:
+// Hotboards_switches dip1( PA_9 , PA_8 , PB_10 , PB_4 , 1 );
+// Hotboards_swtiches sw1( PA_6 , 1 );
+// In any case the function will return a HIGH(1) value any time the sw is closed
+
+//For this example we will use the USB serial port, here we initialize it
+Serial pc(USBTX,USBRX);
+
+int i, j;
+uint8_t binary, decimal;
+
+int main()
+{
+ while(1)
+ {
+ //Asks for the state of the sw1
+ if( sw1.read( ) )
+ {
+ pc.printf( "sw1 = close (on)\r" );
+ }
+ else
+ {
+ pc.printf( "sw1 = open (off)\r" );
+ }
+ //Asks for the state of an specific sw from the dip switch dip1
+ if( dip1.read( 2 ) )
+ {
+ pc.printf( "dip sw2 = close (on)\r" );
+ }
+ else
+ {
+ pc.printf( "dip sw2 = open (off)\r" );
+ }
+
+ // Reads the dip switch value and puts it in binary
+ binary = dip1.read();
+ // Inverts the read value to make it coincide with the state of each
+ // switch in binary
+ binary = ~binary;
+ // Applies a mask(00001111) to extract the value of the dip switch
+ decimal = binary&0x0F;
+ // Sends throught USB serial the value in decimal
+ pc.printf( "dec = " );
+ pc.printf( "%d\r" , decimal );
+ // Sends through USB serial the value in binary
+ pc.printf( "bin = " );
+ for(i=0;i<4;i++) //Extracts and shows the binary value of each sw
+ {
+ j = binary&0x08; //Applies a mask(00001000) to extract the value of the bit in turn
+ j>>=3; //Moves this bit 3 positions to the right
+ pc.printf("%d",j); //Sends through USB serial the value of the extracted bit
+ binary <<=1; //Moves the position 1 bit to the left to extract the next bit
+ }
+ pc.printf( "\n\r" );
+ wait( 2 );
+ }
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed Mar 02 20:33:31 2016 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/87f2f5183dfb \ No newline at end of file