Micropendous 3

Tags: arch:avr chip:at90usb

This is the documentation page for the port of NuttX to the Micropendous 3 board. This board is developed by opendous. The Micropendous 3 is based on an Atmel AT90USB646, 647, 1286 or 1287 MCU. NuttX was ported using the AT90USB647 version. As of this writing, documentation for the Micropendous board is available here

Micropendous3 Features

  • Based on the 64-pin USB AVR Microcontrollers: AT90USB646, AT90USB647,

  • AT90USB1286, or AT90USB1287.

  • USB Full Speed (12Mbit/s)

  • USB Device Mode (Host mode supported with AT90USBxx7 devices)

  • 60kb (AT90USB64) or 120kb (AT90USB128) of available FLASH memory for

  • your programs (4kb(AT90USB64)/8kb(AT90USB128) used by USB bootloader -

  • stock Atmel or LUFA)

  • 4 kbytes SRAM and 2 kbytes of EEPROM (AT90USB64) or 8 kbytes SRAM and 4

  • kbytes of EEPROM (AT90USB128)

  • External SRAM is possible. Layout for CY7C1019D 1-Mbit SRAM (unpopulated)

  • USB powered

  • 16MHz crystal

  • 48 General Purpose IO Pins (47 with external SRAM)

  • Vcc=VBUS jumper selects whether USB VBUS or an external supply is used

  • to power the board

  • RESET and HWB buttons to enable firmware loading over USB (no external

  • programmer required)

  • HWB can be used as a user button

  • USB-A Plug

  • JTAG header

  • Size LxWxH (including headers): 3.15” x 0.8” x 0.6” =~ 8cm x 2cm x 1.5cm

  • Completely OpenHardware Design

Pin Usage

AT90USB90128/64 TQFP64

PIN

SIGNAL

BOARD CONNECTION

1

(INT.6/AIN.0) PE6

J3-25 E6, CY7C1019D ^CE (Unpopulated)

2

(INT.7/AIN.1/UVcon) PE7

J3-26 E7, CY7C1019D A16 (Unpopulated)

3

UVcc

4

D-

USB DP

5

D+

USB DM

6

UGnd

GND

7

UCap

GND (via cap)

8

VBus

USB VBUS

9

(IUID) PE3

J3-22 E3

10

(SS/PCINT0) PB0

J3-28 B0

11

(PCINT1/SCLK) PB1

J3-29 B1

12

(PDI/PCINT2/MOSI) PB2

J3-30 B2

13

(PDO/PCINT3/MISO) PB3

J3-31 B3

14

(PCINT4/OC.2A) PB4

J3-32 B4

15

(PCINT5/OC.1A) PB5

J3-33 B5

16

(PCINT6/OC.1B) PB6

J3-34 B6

17

(PCINT7/OC.0A/OC.1C) PB7

J3-35 B7

18

(INT4/TOSC1) PE4

J3-23 E4

19

(INT.5/TOSC2) PE5

J3-24 E5

20

RESET

SW1

21

VCC

VCC

22

GND

GND

23

XTAL2

X1

24

XTAL1

X1

25

(OC0B/SCL/INT0) PD0

J3-36 D0

26

(OC2B/SDA/INT1) PD1

J3-37 D1

27

(RXD1/INT2) PD2

J3-38 D2

28

(TXD1/INT3) PD3

J3-39 D3

29

(ICP1) PD4

J3-40 D4

30

(XCK1) PD5

J3-41 D5

31

(T1) PD6

J3-42 D6

32

(T0) PD7

J3-43 D7

48

PA3 (AD3)

J3-14 A3, 74AHC573 D3, CY7C1019D O3 (Unpopulated)

47

PA4 (AD4)

J3-15 A4, 74AHC573 D4, CY7C1019D O4 (Unpopulated)

46

PA5 (AD5)

J3-16 A5, 74AHC573 D5, CY7C1019D O5 (Unpopulated)

45

PA6 (AD6)

J3-17 A6, 74AHC573 D6, CY7C1019D O6 (Unpopulated)

44

PA7 (AD7)

J3-18 A7, 74AHC573 D7, CY7C1019D O7 (Unpopulated)

43

PE2 (ALE/HWB)

SW-2 (pulled-up), J3-21 E2, 74AHC573 Cp

42

PC7 (A15/IC.3/CLKO)

J3-51 C7, CY7C1019D A15 (Unpopulated)

41

PC6 (A14/OC.3A)

J3-50 C6, CY7C1019D A14 (Unpopulated)

40

PC5 (A13/OC.3B)

J3-49 C5, CY7C1019D A13 (Unpopulated)

39

PC4 (A12/OC.3C)

J3-48 C4, CY7C1019D A12 (Unpopulated)

38

PC3 (A11/T.3)

J3-47 C3, CY7C1019D A11 (Unpopulated)

37

PC2 (A10)

J3-46 C2, CY7C1019D A10 (Unpopulated)

36

PC1 (A9)

J3-45 C1, CY7C1019D A9 (Unpopulated)

35

PC0 (A8)

J3-44 C0, CY7C1019D A8 (Unpopulated)

34

PE1 (RD)

J3-20 E1, CY7C1019D ^OE (Unpopulated)

33

PE0 (WR)

J3-19 E0, CY7C1019D ^WE (Unpopulated)

64

AVCC

(Power circuitry)

63

GND

GND

62

AREF

J3-2 AREF, (Power circuitry)

61

PF0 (ADC0)

J3-3 F0

60

PF1 (ADC1)

J3-4 F1

59

PF2 (ADC2)

J3-5 F2

58

PF3 (ADC3)

J3-6 F3

57

PF4 (ADC4/TCK)

J3-7 F4, JTAG TCK

56

PF5 (ADC5/TMS)

J3-8 F5, JTAG TMS

55

PF6 (ADC6/TDO)

J3-9 F6, JTAG TD0

54

PF7 (ADC7/TDI)

J3-20 F7, JTAG TDI

53

GND

GND

52

VCC

VCC

51

PA0 (AD0)

J3-11 A0, 74AHC573 D0, CY7C1019D O0 (Unpopulated)

50

PA1 (AD1)

J3-12 A1, 74AHC573 D1, CY7C1019D O1 (Unpopulated)

49

PA2 (AD2)

J3-13 A2, 74AHC573 D2, CY7C1019D O2 (Unpopulated)

Atmel AVRISP mkII Connection

ISP6PIN Header

      1  2
MISO  o  o VCC
 SCK  o  o MOSI
RESET o  o GND

Micropendous 3 JTAG (JTAG10PIN Connector)

    1  2                 1  2
TCK o  o GND         TCK o  o GND
TDO o  o VCC         TDO o  o VTref
TMS o  o RESET       TMS o  o nSRST
VCC o  o N/C             o  o (nTRST)
TDI o  o GND         TDI o  o GND

JTAGICE mkII Connection to 10-pin Header

10PIN Header

6PIN Header

Pin 1 TCK

Pin 3 SCK

Pin 2 GND

Pin 6 GND

Pin 3 TDO

Pin 1 MISO

Pin 4 VTref

Pin 2 Vcc

Pin 6 nSRT

Pin 5 Reset

Pin 9 TDI

Pin 4 MOSI

DFU Bootloader

There is also an DFU bootloader that resides in the upper 8Kb of FLASH (unless you ERASE the flash with ICE). You can enter this bootloader (if it is in FLASH) by:

Holding both the SW1 (RESET) and SW2, then releasing SW1 while continuing to hold SW2. SW2 connects to the PE2/HWB signal and causes a reset into the bootloader memory region.

Then you can use FLIP to load code into FLASH (available at the Atmel Web Site). The DFU USB driver for the DFU bootload is available in the usb subdirectory in the FLIP installation location.

Toolchains

Read about the tool chains at Microchip AT90USB.

Serial Console

A serial console is supported on an external MAX232/MAX3232 Connected on PD2 and PD3:

Port D, Bit 2: RXD1, Receive Data (Data input pin for the USART1).

When the USART1 receiver is enabled this pin is configured as an input regardless of the value of DDD2. When the USART forces this pin to be an input, the pull-up can still be controlled by the PORTD2 bit.

Port D, Bit 3: TXD1, Transmit Data (Data output pin for the USART1).

When the USART1 Transmitter is enabled, this pin is configured as an output regardless of the value of DDD3.

AT90USB90128/64 TQFP64

PIN

SIGNAL

BOARD CONNECTION

27

(RXD1/INT2) PD2

J3-38 D2

28

(TXD1/INT3) PD3

J3-39 D3

Micropendous 3 Configuration Options

Individual subsystems can be enabled:

  • CONFIG_AVR_INT0=n

  • CONFIG_AVR_INT1=n

  • CONFIG_AVR_INT2=n

  • CONFIG_AVR_INT3=n

  • CONFIG_AVR_INT4=n

  • CONFIG_AVR_INT5=n

  • CONFIG_AVR_INT6=n

  • CONFIG_AVR_INT7=n

  • CONFIG_AVR_USBHOST=n

  • CONFIG_AVR_USBDEV=n

  • CONFIG_AVR_WDT=n

  • CONFIG_AVR_TIMER0=n

  • CONFIG_AVR_TIMER1=n

  • CONFIG_AVR_TIMER2=n

  • CONFIG_AVR_TIMER3=n

  • CONFIG_AVR_SPI=n

  • CONFIG_AVR_USART1=y

  • CONFIG_AVR_ANACOMP=n

  • CONFIG_AVR_ADC=n

  • CONFIG_AVR_TWI=n

If the watchdog is enabled, this specifies the initial timeout. Default is maximum supported value.

  • CONFIG_WDTO_15MS

  • CONFIG_WDTO_30MS

  • CONFIG_WDTO_60MS

  • CONFIG_WDTO_120MS

  • CONFIG_WDTO_1250MS

  • CONFIG_WDTO_500MS

  • CONFIG_WDTO_1S

  • CONFIG_WDTO_2S

  • CONFIG_WDTO_4S

  • CONFIG_WDTO_8S

AT90USB specific device driver settings:

  • CONFIG_USARTn_SERIAL_CONSOLE: selects the USARTn for the console and ttys0 (default is no serial console).

  • CONFIG_USARTn_RXBUFSIZE: Characters are buffered as received. This specific the size of the receive buffer

  • CONFIG_USARTn_TXBUFSIZE: Characters are buffered before being sent. This specific the size of the transmit buffer

  • CONFIG_USARTn_BAUD: The configure BAUD of the USART. Must be

  • CONFIG_USARTn_BITS: The number of bits. Must be either 7 or 8.

  • CONFIG_USARTn_PARTIY: 0=no parity, 1=odd parity, 2=even parity

  • CONFIG_USARTn_2STOP: Two stop bits

Configurations

  1. Each Micropendous3 configuration is maintained in a sub-directory and can be selected as follows:

    $ tools/configure.sh micropendous3:<subdir>
    

    Where <subdir> is one of the configuration sub-directories described in the following paragraph.

    Note

    You must also copy avr-libc header files, perhaps like:

    $ cp -a /cygdrive/c/WinAVR/include/avr include/.
    
  2. These configurations use the mconf-based configuration tool. To change a configurations using that tool, you should:

    1. Build and install the kconfig-mconf tool. See nuttx/README.txt see additional README.txt files in the NuttX tools repository.

    2. Execute make menuconfig in nuttx/ in order to start the reconfiguration process.

  3. By default, all configurations assume the NuttX Buildroot toolchain under Cygwin with Windows. This is easily reconfigured:

    • CONFIG_HOST_WINDOWS=y

    • CONFIG_WINDOWS_CYGWIN=y

    • CONFIG_AVR_BUILDROOT_TOOLCHAIN=y

  4. Build with GCC disables CONFIG_DEBUG_OPT_UNUSED_SECTIONS by default. This is because the linker script was not checked to determine if it properly prevents removal of sections which the linker considers unreferenced but which must be present in the binary.

hello

The simple apps/examples/hello “Hello, World!” example.

FLASH/SRAM Requirements (as of 6/16/2011):

$ avr-nuttx-elf-size nuttx
 text    data     bss     dec     hex filename
24816     978     308   26102    65f6 nuttx

Strings are in SRAM.