Wolfgang Raimann
Testprogramm für BERTL 2014, der BULME Graz/Gösting. Die Taster vom I2C Expander werden direkt auf die LED's des Expander geschalten
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BERTL14_I2C_TEST
by 
Wolfgang Raimann
Revision 0:7def09334278, committed 2014-05-07
- Comitter:
- bulme_rai
- Date:
- Wed May 07 10:02:43 2014 +0000
- Commit message:
- Testprogramm f?r BERTL 2014, der BULME Graz/G?sting.; Die Taster vom I2C Expander werden direkt auf die LED's des Expander geschalten
Changed in this revision
| main.cpp | Show annotated file Show diff for this revision Revisions of this file |
| mbed.bld | Show annotated file Show diff for this revision Revisions of this file |
diff -r 000000000000 -r 7def09334278 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Wed May 07 10:02:43 2014 +0000
@@ -0,0 +1,43 @@
+/***********************************
+name: BERTL14_I2C_TEST
+author: Wolfgang Raimann
+email: rai@bulme.at
+description:
+ Die Taster vom I2C Expander werden direkt auf die LED's des Expander geschalten
+***********************************/
+
+#include "mbed.h"
+
+const int PCA9555_ADR = 0x40;
+#define I2C_WRITE 0
+#define I2C_READ 1
+
+I2C i2c(p28, p27);
+
+
+int main() {
+ char btn = 0;
+ // Config PCA9555 I0 as output
+ i2c.start();
+ i2c.write(PCA9555_ADR + I2C_WRITE);
+ i2c.write(0x06);
+ i2c.write(0x00);
+ i2c.stop();
+
+ while(1) {
+ // Einlesen der Taster
+ i2c.start();
+ i2c.write(PCA9555_ADR + I2C_WRITE);
+ i2c.write(0x01);
+ i2c.start();
+ i2c.write(PCA9555_ADR + I2C_READ);
+ btn = i2c.read(0);
+ i2c.stop();
+ // Schreiben auf die LED's
+ i2c.start();
+ i2c.write(PCA9555_ADR + I2C_WRITE);
+ i2c.write(0x02);
+ i2c.write(~btn);
+ i2c.stop();
+ }
+}
diff -r 000000000000 -r 7def09334278 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Wed May 07 10:02:43 2014 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/8a40adfe8776 \ No newline at end of file