531 lines
18 KiB
Plaintext
531 lines
18 KiB
Plaintext
README
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^^^^^
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This is the README file for the port of NuttX to the Micropendous 3 board.
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This board is develepmend by http://code.google.com/p/opendous/. The
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Micropendous 3 is based on an Atmel AT90USB646, 647, 1286 or 1287 MCU.
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NuttX was ported using the AT90USB647 version. As of this writing,
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documentation for the Micropendous board is available here:
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http://code.google.com/p/micropendous/wiki/Micropendous3
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Contents
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^^^^^^^^
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o Micropendous3 Features
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o Pin Usage
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o Atmel AVRISP mkII Connection
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o DFU Bootloader
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o Serial Console
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o Toolchains
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o Windows Native Toolchains
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o NuttX buildroot Toolchain
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o avr-libc
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o Micropendous3 Configuration Options
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o Configurations
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Micropendous3 Features
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^^^^^^^^^^^^^^^^^^^^^^
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o Based on the 64-pin USB AVR Microcontrollers: AT90USB646, AT90USB647,
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AT90USB1286, or AT90USB1287.
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o USB Full Speed (12Mbit/s)
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o USB Device Mode (Host mode supported with AT90USBxx7 devices)
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o 60kb (AT90USB64) or 120kb (AT90USB128) of available FLASH memory for
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your programs (4kb(AT90USB64)/8kb(AT90USB128) used by USB bootloader -
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stock Atmel or LUFA)
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o 4 kbytes SRAM and 2 kbytes of EEPROM (AT90USB64) or 8 kbytes SRAM and 4
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kbytes of EEPROM (AT90USB128)
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o External SRAM is possible. Layout for CY7C1019D 1-Mbit SRAM (unpopulated)
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o USB powered
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o 16MHz crystal
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o 48 General Purpose IO Pins (47 with external SRAM)
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o Vcc=VBUS jumper selects whether USB VBUS or an external supply is used
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to power the board
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o RESET and HWB buttons to enable firmware loading over USB (no external
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programmer required)
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o HWB can be used as a user button
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o USB-A Plug
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o JTAG header
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o Size LxWxH (including headers): 3.15" x 0.8" x 0.6" =~ 8cm x 2cm x 1.5cm
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o Completely OpenHardware Design
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Pin Usage
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^^^^^^^^^
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AT90USB90128/64 TQFP64
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-- ------------------------ ---------------------------------------------
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PIN SIGNAL BOARD CONNECTION
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-- ------------------------ ---------------------------------------------
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(left)
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1 (INT.6/AIN.0) PE6 J3-25 E6, CY7C1019D ^CE (Unpopulated)
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2 (INT.7/AIN.1/UVcon) PE7 J3-26 E7, CY7C1019D A16 (Unpopulated)
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3 UVcc
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4 D- USB DP
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5 D+ USB DM
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6 UGnd GND
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7 UCap GND (via cap)
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8 VBus USB VBUS
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9 (IUID) PE3 J3-22 E3
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10 (SS/PCINT0) PB0 J3-28 B0
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11 (PCINT1/SCLK) PB1 J3-29 B1
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12 (PDI/PCINT2/MOSI) PB2 J3-30 B2
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13 (PDO/PCINT3/MISO) PB3 J3-31 B3
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14 (PCINT4/OC.2A) PB4 J3-32 B4
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15 (PCINT5/OC.1A) PB5 J3-33 B5
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16 (PCINT6/OC.1B) PB6 J3-34 B6
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(bottom)
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17 (PCINT7/OC.0A/OC.1C) PB7 J3-35 B7
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18 (INT4/TOSC1) PE4 J3-23 E4
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19 (INT.5/TOSC2) PE5 J3-24 E5
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20 RESET SW1
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21 VCC VCC
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22 GND GND
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23 XTAL2 X1
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24 XTAL1 X1
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25 (OC0B/SCL/INT0) PD0 J3-36 D0
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26 (OC2B/SDA/INT1) PD1 J3-37 D1
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27 (RXD1/INT2) PD2 J3-38 D2
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28 (TXD1/INT3) PD3 J3-39 D3
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29 (ICP1) PD4 J3-40 D4
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30 (XCK1) PD5 J3-41 D5
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31 (T1) PD6 J3-42 D6
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32 (T0) PD7 J3-43 D7
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(right)
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48 PA3 (AD3) J3-14 A3, 74AHC573 D3, CY7C1019D |O3 (Unpopulated)
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47 PA4 (AD4) J3-15 A4, 74AHC573 D4, CY7C1019D |O4 (Unpopulated)
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46 PA5 (AD5) J3-16 A5, 74AHC573 D5, CY7C1019D |O5 (Unpopulated)
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45 PA6 (AD6) J3-17 A6, 74AHC573 D6, CY7C1019D |O6 (Unpopulated)
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44 PA7 (AD7) J3-18 A7, 74AHC573 D7, CY7C1019D |O7 (Unpopulated)
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43 PE2 (ALE/HWB) SW-2 (pulled-up), J3-21 E2, 74AHC573 Cp
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42 PC7 (A15/IC.3/CLKO) J3-51 C7, CY7C1019D A15 (Unpopulated)
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41 PC6 (A14/OC.3A) J3-50 C6, CY7C1019D A14 (Unpopulated)
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40 PC5 (A13/OC.3B) J3-49 C5, CY7C1019D A13 (Unpopulated)
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39 PC4 (A12/OC.3C) J3-48 C4, CY7C1019D A12 (Unpopulated)
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38 PC3 (A11/T.3) J3-47 C3, CY7C1019D A11 (Unpopulated)
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37 PC2 (A10) J3-46 C2, CY7C1019D A10 (Unpopulated)
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36 PC1 (A9) J3-45 C1, CY7C1019D A9 (Unpopulated)
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35 PC0 (A8) J3-44 C0, CY7C1019D A8 (Unpopulated)
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34 PE1 (RD) J3-20 E1, CY7C1019D ^OE (Unpopulated)
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33 PE0 (WR) J3-19 E0, CY7C1019D ^WE (Unpopulated)
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(top)
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64 AVCC (Power circuitry)
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63 GND GND
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62 AREF J3-2 AREF, (Power circuitry)
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61 PF0 (ADC0) J3-3 F0
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60 PF1 (ADC1) J3-4 F1
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59 PF2 (ADC2) J3-5 F2
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58 PF3 (ADC3) J3-6 F3
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57 PF4 (ADC4/TCK) J3-7 F4, JTAG TCK
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56 PF5 (ADC5/TMS) J3-8 F5, JTAG TMS
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55 PF6 (ADC6/TDO) J3-9 F6, JTAG TD0
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54 PF7 (ADC7/TDI) J3-20 F7, JTAG TDI
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53 GND GND
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52 VCC VCC
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51 PA0 (AD0) J3-11 A0, 74AHC573 D0, CY7C1019D |O0 (Unpopulated)
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50 PA1 (AD1) J3-12 A1, 74AHC573 D1, CY7C1019D |O1 (Unpopulated)
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49 PA2 (AD2) J3-13 A2, 74AHC573 D2, CY7C1019D |O2 (Unpopulated)
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Atmel AVRISP mkII Connection
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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ISP6PIN Header
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--------------
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1 2
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MISO o o VCC
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SCK o o MOSI
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RESET o o GND
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Micropendous 3 JTAG (JTAG10PIN Connector)
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------------------- ---------------------
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1 2 1 2
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TCK o o GND TCK o o GND
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TDO o o VCC TDO o o VTref
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TMS o o RESET TMS o o nSRST
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VCC o o N/C o o (nTRST)
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TDI o o GND TDI o o GND
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JTAGICE mkII Connection to 10-pin Header
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------------------------------------------
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10PIN Header 6PIN Header
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-------------------- ---------------------
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Pin 1 TCK Pin 3 SCK
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Pin 2 GND Pin 6 GND
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Pin 3 TDO Pin 1 MISO
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Pin 4 VTref Pin 2 Vcc
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Pin 6 nSRT Pin 5 Reset
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Pin 9 TDI Pin 4 MOSI
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DFU Bootloader
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^^^^^^^^^^^^^^
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There is also an DFU bootloader that resides in the upper 8Kb of FLASH
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(unless you ERASE the flash with with ICE). You can enter this bootloader
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(if it is in FLASH) by:
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Holding both the SW1 (RESET) and SW2, then releasing SW1 while continuing
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to hold SW2. SW2 connects to the PE2/HWB signal and causes a reset into
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the bootloader memory region.
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Then you can use FLIP to load code into FLASH (available at the Atmel Web
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Site). The DFU USB driver for the DFU bootload is available in the usb
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subdirectory in the FLIP installation location.
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Serial Console
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^^^^^^^^^^^^^^
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A serial console is supported on an external MAX232/MAX3232 Connected
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on PD2 and PD3:
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Port D, Bit 2: RXD1, Receive Data (Data input pin for the USART1). When
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the USART1 receiver is enabled this pin is configured as an input
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regardless of the value of DDD2. When the USART forces this pin to
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be an input, the pull-up can still be controlled by the PORTD2 bit.
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Port D, Bit 3: TXD1, Transmit Data (Data output pin for the USART1).
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When the USART1 Transmitter is enabled, this pin is configured as
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an output regardless of the value of DDD3.
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AT90USB90128/64 TQFP64
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-- ------------------------ ---------------------------------------------
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PIN SIGNAL BOARD CONNECTION
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-- ------------------------ ---------------------------------------------
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27 (RXD1/INT2) PD2 J3-38 D2
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28 (TXD1/INT3) PD3 J3-39 D3
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Toolchains
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^^^^^^^^^^
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There are several toolchain options. However, testing has been performed
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using *only* the NuttX buildroot toolchain described below. Therefore,
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the NuttX buildroot toolchain is the recommended choice:
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Buildroot:
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There is a DIY buildroot version for the AVR boards here:
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http://sourceforge.net/projects/nuttx/files/buildroot/. See the
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following section for details on building this toolchain.
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It is assumed in some places that buildroot toolchain is available
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at ../misc/buildroot/build_avr. Edit the setenv.sh file if
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this is not the case.
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After configuring NuttX, make sure that CONFIG_AVR_BUILDROOT=y is set in your
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.config file.
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WinAVR:
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For Cygwin development environment on Windows machines, you can use
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WinAVR: http://sourceforge.net/projects/winavr/files/
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It is assumed in some places that WinAVR is installed at C:/WinAVR. Edit the
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setenv.sh file if this is not the case.
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After configuring NuttX, make sure that CONFIG_AVR_WINAVR=y is set in your
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.config file.
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WARNING: There is an incompatible version of cygwin.dll in the WinAVR/bin
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directory! Make sure that the path to the correct cygwin.dll file precedes
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the path to the WinAVR binaries!
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Linux:
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For Linux, there are widely available avr-gcc packages. On Ubuntu, use:
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sudo apt-get install gcc-avr gdb-avr avr-libc
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After configuring NuttX, make sure that CONFIG_AVR_LINUXGCC=y is set in your
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.config file.
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Windows Native Toolchains
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^^^^^^^^^^^^^^^^^^^^^^^^^
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The WinAVR toolchain is a Windows native toolchain. There are several
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limitations to using a Windows native toolchain in a Cygwin environment.
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The three biggest are:
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1. The Windows toolchain cannot follow Cygwin paths. Path conversions are
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performed automatically in the Cygwin makefiles using the 'cygpath'
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utility but you might easily find some new path problems. If so, check
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out 'cygpath -w'
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2. Windows toolchains cannot follow Cygwin symbolic links. Many symbolic
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links are used in Nuttx (e.g., include/arch). The make system works
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around these problems for the Windows tools by copying directories
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instead of linking them. But this can also cause some confusion for
|
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you: For example, you may edit a file in a "linked" directory and find
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that your changes had no effect. That is because you are building the
|
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copy of the file in the "fake" symbolic directory. If you use a
|
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Windows toolchain, you should get in the habit of making like this:
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make clean_context all
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An alias in your .bashrc file might make that less painful.
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3. Dependencies are not made when using Windows versions of the GCC. This
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is because the dependencies are generated using Windows pathes which do
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not work with the Cygwin make.
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Support has been added for making dependencies with the windows-native
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toolchains. That support can be enabled by modifying your Make.defs
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file as follows:
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- MKDEP = $(TOPDIR)/tools/mknulldeps.sh
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+ MKDEP = $(TOPDIR)/tools/mkdeps.sh --winpaths "$(TOPDIR)"
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If you have problems with the dependency build (for example, if you are
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not building on C:), then you may need to modify tools/mkdeps.sh
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An additional issue with the WinAVR toolchain, in particular, is that it
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contains an incompatible version of the Cygwin DLL in its bin/ directory.
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You must take care that the correct Cygwin DLL is used.
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NuttX buildroot Toolchain
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^^^^^^^^^^^^^^^^^^^^^^^^^
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If NuttX buildroot toolchain source tarball cne can be downloaded from the
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NuttX SourceForge download site (https://sourceforge.net/projects/nuttx/files/).
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This GNU toolchain builds and executes in the Linux or Cygwin environment.
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1. You must have already configured Nuttx in <some-dir>/nuttx.
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cd tools
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./configure.sh micropendous3/<sub-dir>
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NOTE: you also must copy avr-libc header files into the NuttX include
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directory with command perhaps like:
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cp -a /cygdrive/c/WinAVR/include/avr include/.
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2. Download the latest buildroot package into <some-dir>
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3. unpack the buildroot tarball. The resulting directory may
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have versioning information on it like buildroot-x.y.z. If so,
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rename <some-dir>/buildroot-x.y.z to <some-dir>/buildroot.
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4. cd <some-dir>/buildroot
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5. cp configs/avr-defconfig-4.5.2 .config
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6. make oldconfig
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7. make
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8. Edit setenv.h, if necessary, so that the PATH variable includes
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the path to the newly built binaries.
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See the file configs/README.txt in the buildroot source tree. That has more
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detailed PLUS some special instructions that you will need to follow if you
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are building a toolchain for Cygwin under Windows.
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avr-libc
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^^^^^^^^
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Header Files
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In any case, header files from avr-libc are required: http://www.nongnu.org/avr-libc/.
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A snapshot of avr-lib is included in the WinAVR installation. For Linux
|
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development platforms, avr-libc package is readily available (and would
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be installed in the apt-get command shown above). But if you are using
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the NuttX buildroot configuration on Cygwin, then you will have to build
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get avr-libc from binaries.
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Header File Installation
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The NuttX build will required that the AVR header files be available via
|
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the NuttX include directory. This can be accomplished by either copying
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the avr-libc header files into the NuttX include directory:
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cp -a <avr-libc-path>/include/avr <nuttx-path>/include/.
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Or simply using a symbolic link:
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ln -s <avr-libc-path>/include/avr <nuttx-path>/include/.
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Build Notes:
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It may not necessary to have a built version of avr-lib; only header files
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are required. Bu if you choose to use the optimized libraru functions of
|
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the flowing point library, then you may have to build avr-lib from sources.
|
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Below are instructions for building avr-lib from fresh sources:
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1. Download the avr-libc package from:
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http://savannah.nongnu.org/projects/avr-libc/
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I am using avr-lib-1.7.1.tar.bz2
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|
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2. Upack the tarball and cd into the
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tar jxf avr-lib-1.7.1.tar.bz2
|
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cd avr-lib-1.7.1
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3. Configure avr-lib. Assuming that WinAVR is installed at the following
|
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location:
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|
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export PATH=/cygdrive/c/WinAVR/bin:$PATH
|
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./configure --build=`./config.guess` --host=avr
|
|
|
|
This takes a *long* time.
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|
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4. Make avr-lib.
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|
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make
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This also takes a long time because it generates variants for nearly
|
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all AVR chips.
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|
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5. Install avr-lib.
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make install
|
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Micropendous3 Configuration Options
|
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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|
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CONFIG_ARCH - Identifies the arch/ subdirectory. This should
|
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be set to:
|
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|
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CONFIG_ARCH=avr
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|
|
CONFIG_ARCH_family - For use in C code:
|
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|
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CONFIG_ARCH_AVR=y
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|
|
CONFIG_ARCH_architecture - For use in C code:
|
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|
|
CONFIG_ARCH_AT90USB=y
|
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|
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CONFIG_ARCH_CHIP - Identifies the arch/*/chip subdirectory
|
|
|
|
CONFIG_ARCH_CHIP=at90usb
|
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|
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CONFIG_ARCH_CHIP_name - For use in C code to identify the exact
|
|
chip. This should be exactly one of
|
|
|
|
CONFIG_ARCH_CHIP_AT90USB646=y
|
|
CONFIG_ARCH_CHIP_AT90USB647=y
|
|
CONFIG_ARCH_CHIP_AT90USB1286=y
|
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CONFIG_ARCH_CHIP_AT90USB1287=y
|
|
|
|
Depending on which Micropendous3 version you have.
|
|
|
|
CONFIG_ARCH_BOARD - Identifies the configs subdirectory and
|
|
hence, the board that supports the particular chip or SoC.
|
|
|
|
CONFIG_ARCH_BOARD=micropendous3
|
|
|
|
CONFIG_ARCH_BOARD_name - For use in C code
|
|
|
|
CONFIG_ARCH_BOARD_MICROPENOUS3=y
|
|
|
|
CONFIG_ARCH_LOOPSPERMSEC - Must be calibrated for correct operation
|
|
of delay loops
|
|
|
|
CONFIG_ENDIAN_BIG - define if big endian (default is little
|
|
endian)
|
|
|
|
CONFIG_DRAM_SIZE - Describes the installed DRAM. One of:
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|
|
CONFIG_DRAM_SIZE=(4*1024) - (4Kb)
|
|
CONFIG_DRAM_SIZE=(8*1024) - (8Kb)
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|
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CONFIG_DRAM_START - The start address of installed SRAM
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|
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CONFIG_DRAM_START=0x800100
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|
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CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to boards that
|
|
have LEDs
|
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|
|
CONFIG_ARCH_INTERRUPTSTACK - This architecture supports an interrupt
|
|
stack. If defined, this symbol is the size of the interrupt
|
|
stack in bytes. If not defined, the user task stacks will be
|
|
used during interrupt handling.
|
|
|
|
CONFIG_ARCH_STACKDUMP - Do stack dumps after assertions
|
|
|
|
CONFIG_ARCH_LEDS - Use LEDs to show state. Unique to board architecture.
|
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|
|
CONFIG_ARCH_CALIBRATION - Enables some build in instrumentation that
|
|
cause a 100 second delay during boot-up. This 100 second delay
|
|
serves no purpose other than it allows you to calibratre
|
|
CONFIG_ARCH_LOOPSPERMSEC. You simply use a stop watch to measure
|
|
the 100 second delay then adjust CONFIG_ARCH_LOOPSPERMSEC until
|
|
the delay actually is 100 seconds.
|
|
|
|
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
|
|
^^^^^^^^^^^^^^
|
|
|
|
Each Micropendous3 configuration is maintained in a sudirectory and can
|
|
be selected as follow:
|
|
|
|
cd tools
|
|
./configure.sh micropendous3/<subdir>
|
|
cd -
|
|
. ./setenv.sh
|
|
|
|
NOTE: You must also copy avr-libc header files, perhaps like:
|
|
|
|
cp -a /cygdrive/c/WinAVR/include/avr include/.
|
|
|
|
Where <subdir> is one of the following:
|
|
|
|
hello:
|
|
The simple apps/examples/hello "Hello, World!" example.
|
|
|
|
FLASH/SRAM Requirements (as of 6/16/2011):
|
|
|
|
$ avr-elf-size nuttx
|
|
text data bss dec hex filename
|
|
24816 978 308 26102 65f6 nuttx
|
|
|
|
Strings are in SRAM.
|