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 /media/uploads/k4zuki/mbedshield050.brd.png
  • Schematic photo vvv /media/uploads/k4zuki/mbedshield050.sch.png
  • Functionality photo vvv /media/uploads/k4zuki/mbedshieldfunc.jpg

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!
arduino0.4.00.5.0
D4p12p21
D5p11p22
MOSI_nonep11
MISO_nonep12
SCK_nonep13

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

part_of_PinNames.h

        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

I2C.h

Committer:
rolf.meyer@arm.com
Date:
2009-08-28
Revision:
11:1c1ebd0324fa
Parent:
4:5d1359a283bc
Child:
12:f63353af7be8

File content as of revision 11:1c1ebd0324fa:

/* mbed Microcontroller Library - I2C
 * Copyright (c) 2007-2009 ARM Limited. All rights reserved.
 * sford
 */ 
 
#ifndef MBED_I2C_H
#define MBED_I2C_H

#include "platform.h"
#include "PinNames.h"
#include "PeripheralNames.h"
#include "Base.h"

namespace mbed {

/* Class: I2C
 *  An I2C Master, used for communicating with I2C slave devices
 *
 * Example:
 * > // Read from I2C slave at address 0x1234
 * >
 * > #include "mbed.h"
 * >
 * > I2C i2c(p28, p27);
 * >
 * > int main() {
 * >     int address = 0x1234;
 * >     char data[2];
 * >     i2c.read(address,data,2);
 * >     // ...
 * > }
 */
class I2C : public Base {

public:

    /* Constructor: I2C
     *  Create an I2C Master interface, connected to the specified pins
     *
     * Variables:
     *  sda - I2C data line pin
     *  scl - I2C clock line pin
     */
    I2C(PinName sda, PinName scl, const char *name = NULL);

    /* Function: frequency
     *  Set the frequency of the I2C interface
     *
     * Variables:
     *  hz - The bus frequency in hertz
     */
    void frequency(int hz);

    /* Function: read
     *  Read from an I2C slave
     *
     * Variables:
     *  address - 7-bit I2C slave address (0-127)
     *  data - Pointer to the byte-array to read data in to 
     *  length - Number of bytes to read
     *  returns - 0 on success (ack), or 1 on failure (nack)
     */ 
    int read(int address, char *data, int length); 

    /* Function: write
     *  Write to an I2C slave
     *
     * Variables:
     *  address - 7-bit I2C slave address (0-127)
     *  data - Pointer to the byte-array data to send 
     *  length - Number of bytes to send
     *  returns - 0 on success (ack), or 1 on failure (nack)
     */ 
    int write(int address, const char *data, int length);
    
protected:

    I2CName _i2c;
    
    void aquire();
    static I2C *_owner;
    int _hz;

};

} // namespace mbed

#endif