mbed official
SPI Hello World
mbed 2 and mbed OS 5
This is an mbed 2 example. For an mbed-os example, please see:
Revision 0:466ad3f38b6b, committed 2013-02-12
- Comitter:
- mbed_official
- Date:
- Tue Feb 12 17:25:49 2013 +0000
- Commit message:
- SPI Hello World
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 466ad3f38b6b main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Tue Feb 12 17:25:49 2013 +0000
@@ -0,0 +1,27 @@
+#include "mbed.h"
+
+SPI spi(p5, p6, p7); // mosi, miso, sclk
+DigitalOut cs(p8);
+
+int main() {
+ // Chip must be deselected
+ cs = 1;
+
+ // Setup the spi for 8 bit data, high steady state clock,
+ // second edge capture, with a 1MHz clock rate
+ spi.format(8,3);
+ spi.frequency(1000000);
+
+ // Select the device by seting chip select low
+ cs = 0;
+
+ // Send 0x8f, the command to read the WHOAMI register
+ spi.write(0x8F);
+
+ // Send a dummy byte to receive the contents of the WHOAMI register
+ int whoami = spi.write(0x00);
+ printf("WHOAMI register = 0x%X\n", whoami);
+
+ // Deselect the device
+ cs = 1;
+}
\ No newline at end of file
diff -r 000000000000 -r 466ad3f38b6b mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Tue Feb 12 17:25:49 2013 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/0954ebd79f59 \ No newline at end of file