masa miya
/
sinewave
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Revision 0:9bc069e1c225, committed 2011-04-17
- Comitter:
- jf1vrr
- Date:
- Sun Apr 17 14:50:50 2011 +0000
- Commit message:
- Rev. 0.01A 2011/04/17
Changed in this revision
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/TextLCD.lib Sun Apr 17 14:50:50 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/simon/code/TextLCD/#44f34c09bd37
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Sun Apr 17 14:50:50 2011 +0000
@@ -0,0 +1,38 @@
+/* This program makes a sine wave. This converts 360 degrees
+into radian every once from 0 and gives it in sine function.
+The value multiply 0.5 by the result of the calculation and add 0.5
+to give an offset voltage. As for the value that calculated,
+it becomes a sin wave of center level 1.65V, 0V at the minimum,
+up to 3.3V with a DA converter in this way.
+The sine wave is stored in a local file. Extension is .CSV.
+You can make a graph by Excel and confirm a sine wave.
+*/
+#include "mbed.h"
+#include "TextLCD.h"
+
+TextLCD lcd(p24, p26, p27, p28, p29, p30);
+
+LocalFileSystem local("local");
+DigitalOut busy(LED2);
+AnalogOut DA(p18);
+AnalogIn AD(p20);
+
+int main() {
+ lcd.printf("SinWave\n");
+ FILE *fp;
+
+ if ( NULL == (fp = fopen( "/local/sinewave.csv", "w" )) )
+ error( "" );
+
+ busy = 1;
+
+ for (float i=0; i<360; i++) {
+ DA = sin(i/180*3.14)*0.5+0.5;
+ wait(0.05);
+ lcd.locate(0,1);
+ lcd.printf("DA out %0.5fV", AD.read()*3.3);
+ fprintf( fp, "%f\n", (float)AD.read()*3.3 );
+ }
+ fclose( fp );
+ busy = 0;
+}
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Sun Apr 17 14:50:50 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912