Peter Allnutt
Simple SPI Slave test Application, intended to be used with SSM to show problems with the SPISlave.receive() method
Revision 0:8a63b2e87af8, committed 2011-08-26
- Comitter:
- picnic
- Date:
- Fri Aug 26 10:11:08 2011 +0000
- Commit message:
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 8a63b2e87af8 main.cpp
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp Fri Aug 26 10:11:08 2011 +0000
@@ -0,0 +1,63 @@
+#include "mbed.h"
+
+// Simple Spi Slave
+// Simple SPI Slave receives bytes on the SPI and will echo back the byte received on the next request.
+
+DigitalOut myled(LED1);
+Serial pc(USBTX, USBRX);
+SPISlave spi(p11, p12, p13, p14); // mosi, miso, sclk, ssel
+
+int main() {
+ int v = 0xff;
+ long c = 0;
+ int ch;
+ int echoMode = 1;
+
+ pc.printf("Simple SPI Slave Test\r\n");
+ pc.printf("Uses MBED's SPISlave library (1 byte in - 1 byte out)\r\n");
+ pc.printf("\r\n R : to add an extra reply() call\r\n" );
+ pc.printf(" I : Make a read() call\r\n" );
+ pc.printf(" S : Read receive status\r\n" );
+ pc.printf(" N : No reply()\r\n" );
+ spi.format(8,3);
+
+ spi.reply( v );
+
+ while(1) {
+ if( spi.receive() ) {
+ // Data available - our trigger to do something
+ v = spi.read(); // Read byte from master
+ if ( echoMode ) {
+ // and send last data back
+ spi.reply( v );
+ }
+ pc.printf( "%ld In %02x\r\n", c++, v );
+ }
+
+ if ( pc.readable() ) {
+ ch = pc.getc();
+ switch ( ch ) {
+ case 'R':
+ case 'r':
+ spi.reply( 'B' );
+ pc.printf( "Bogus Replay added\r\n" );
+ break;
+ case 'I':
+ case 'i':
+ v = spi.read();
+ pc.printf( "Extra read = %02x\r\n", v );
+ break;
+ case 'S':
+ case 's':
+ v = spi.receive();
+ pc.printf( "Status = %02x\r\n", v );
+ break;
+ case 'N':
+ case 'n':
+ echoMode = !echoMode;
+ pc.printf( "Echo mode = %d\r\n", (echoMode & 1) );
+ break;
+ }
+ }
+ }
+}
diff -r 000000000000 -r 8a63b2e87af8 mbed.bld --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/mbed.bld Fri Aug 26 10:11:08 2011 +0000 @@ -0,0 +1,1 @@ +http://mbed.org/users/mbed_official/code/mbed/builds/63bcd7ba4912