Kazuki Yamamoto / mbeDshield

The official mbed C/C SDK provides the software platform and libraries to build your applications.

Dependents:   SeeedTouchLCD

Fork of mbed by mbed official

(01.May.2014) started sales! http://www.switch-science.com/catalog/1717/

(13.March.2014) updated to 0.5.0

This is a pin conversion PCB from mbed 1768/11U24 to arduino UNO.

• So if you have both mbed and arduino shields, I guess you would be happy with such a conversion board :)

Photos

• Board photo vvv
• Schematic photo vvv
• Functionality photo vvv

Latest eagle files

PCB >> /media/uploads/k4zuki/mbedshield050.brd
SCH >> /media/uploads/k4zuki/mbedshield050.sch

BIG changes from previous version

1. Ethernet RJ45 connector is removed.
   1. http://mbed.org/components/Seeed-Ethernet-Shield-V20/ is the biggest hint to use Ethernet!
2. Most ALL of components can be bought at Akizuki http://akizukidenshi.com/
   1. But sorry, they do not send parts to abroad
3. Pinout is changed!

This design has bug(s)

1. I²C functional pin differs between 1768 and 11U24.

Fixed bugs here

1. MiniUSB cable cannot be connected on mbed if you solder high-height electrolytic capacitor on C3.
   1. http://akizukidenshi.com/catalog/g/gP-05002/ is the solution to make this 100% AKIZUKI parts!
2. the 6-pin ISP port is not inprimented in version 0.4.0
   1. it will be fixed in later version 0.4.1/0.4.2/0.5.0 This has beenfixed

I am doing some porting to use existing arduino shields but it may faster if you do it by yourself...

you can use arduino PinName "A0-A5,D0-D13" plus backside SPI port for easier porting.

To do this you have to edit PinName enum in

• "mbed/TARGET_LPC1768/PinNames.h" or
• "mbed/TARGET_LPC11U24/PinNames.h" as per your target mbed.

here is the actual list: This list includes define switch to switch pin assignment

        USBTX = P0_2,
        USBRX = P0_3,

//from here mbeDshield mod
        D0=p27,
        D1=p28,
        D2=p14,
        D3=p13,
#ifdef MBEDSHIELD_050
        MOSI_=p11,
        MISO_=p12,
        SCK_=p13,
        D4=p21,
        D5=p22,
#else
        D4=p12,
        D5=p11,
#endif
        D6=p23,
        D7=p24,
        D8=p25,
        D9=p26,
        D10=p8,
        D11=p5,
        D12=p6,
        D13=p7,
        A0=p15,
        A1=p16,
        A2=p17,
        A3=p18,
        A4=p19,
        A5=p20,
        SDA=p9,
        SCL=p10,
//mbeDshield mod ends here
        // Not connected
        NC = (int)0xFFFFFFFF

--- a/I2C.h	Thu Jun 03 11:17:50 2010 +0000
+++ b/I2C.h	Thu Jun 17 16:23:14 2010 +0000
@@ -40,6 +40,11 @@
         , MasterRead
     };
 
+    enum Acknowledge {
+          NoACK = 0
+        , ACK   = 1
+    };
+
     /* Constructor: I2C
      *  Create an I2C Master interface, connected to the specified pins
      *
@@ -72,6 +77,15 @@
      */ 
     int read(int address, char *data, int length, bool repeated = false); 
 
+    /* Function: read
+     *  Read a single byte from the I2C bus
+     *
+     * Variables:
+     *  ack - indicates if the byte is to be acknowledged (1 = acknowledge)
+     *  returns - the byte read
+     */
+    int read(int ack);
+
     /* Function: write
      *  Write to an I2C slave
      *
@@ -86,7 +100,27 @@
      *  returns - 0 on success (ack), or non-0 on failure (nack)
      */ 
     int write(int address, const char *data, int length, bool repeated = false);
-    
+
+    /* Function: write
+     *  Write single byte out on the I2C bus
+     *
+     * Variables:
+     *  data - data to write out on bus
+     *  returns - a '1' if an ACK was retrieved, a '0' otherwise
+     */
+    int write(int data);
+
+    /* Function: start
+     *  Creates a start condition on the I2C bus
+     */
+
+    void start(void);
+
+    /* Function: stop
+     *  Creates a stop condition on the I2C bus
+     */
+    void stop(void);
+
 protected:
 
     void aquire();