1 files changed, 60 insertions, 0 deletions
diff --git a/tmk_core/tool/mbed/mbed-sdk/libraries/tests/mbed/i2c_master_slave/main.cpp b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/mbed/i2c_master_slave/main.cpp
new file mode 100644
index 0000000000..f94b59f3db
--- /dev/null
+++ b/tmk_core/tool/mbed/mbed-sdk/libraries/tests/mbed/i2c_master_slave/main.cpp
@@ -0,0 +1,60 @@
+#include "mbed.h"
+#include "test_env.h"
+#include <stdio.h>
+
+#define ADDR (0xA0)
+#define FREQ 100000
+
+// ********************************************************
+// This tests data transfer between two I2C interfaces on
+// the same chip, one configured as master, the other as
+// slave. Works on the LPC1768 mbed.
+//
+// Wiring:
+//   p28 <-> p9
+//   p27 <-> p10
+//   pull-up resistors on both lines
+// ********************************************************
+
+I2CSlave slave(p9, p10);
+I2C master(p28, p27);
+
+int main()
+{
+    char sent = 'T', received;
+
+    master.frequency(FREQ);
+    slave.frequency(FREQ);
+    slave.address(ADDR);
+
+    // First transfer: master to slave
+    master.start();
+    master.write(ADDR);
+    master.write(sent);
+    if(slave.receive() != I2CSlave::WriteAddressed)
+    {
+        notify_completion(false);
+        return 1;
+    }
+    slave.read(&received, 1);
+    if(sent != received)
+    {
+        notify_completion(false);
+        return 1;
+    }
+    master.stop();
+
+    // Second transfer: slave to master
+    master.start();
+    master.write(ADDR | 1);
+    if(slave.receive() != I2CSlave::ReadAddressed)
+    {
+        notify_completion(false);
+        return 1;
+    }
+    slave.write(received);
+    received = master.read(0);
+    slave.stop();
+    notify_completion(received == sent);
+}
+