Add instructions to use BOSSA to load nuttx into Due
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Gregory Nutt
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@ -17,6 +17,7 @@ Contents
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- NXFLAT Toolchain
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- Buttons and LEDs
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- Serial Consoles
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- Loading Code
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- SAM4S Xplained-specific Configuration Options
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- Configurations
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@ -348,28 +349,198 @@ Buttons and LEDs
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Serial Consoles
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^^^^^^^^^^^^^^^
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The SAM3X has a UART and 4 USARTS. The Programming port uses a USB-to-
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serial chip connected to the first UART0 of the MCU (RX0 and TX0). The
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output from that port is visible using the Arduino tool.
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Any of UART and USART0-3 may be used as a serial console. By default,
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the UART is used as the serial console in all configurations. But that is
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easily changed by modifying the configuration as described under
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"Configurations" below.
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------------------------------
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PIO SIGNAL CONN PIN
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----- ---------- ---- --------
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PA8 [U]RX PWML 1
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PA9 [U]TX PWML 2
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PD4 TXD0 COMM 1
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PD5 RXD0 COMM 2
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PA12 RXD1 COMM 4
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PA13 TXD1 COMM 3
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PA10 RXD2 COMM 6
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PA11 TXD2 COMM 5
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PB20 AD11(TXD3) ADCH 4
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PB21 AD14(RXD3) XIO 33
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Here are the UART signals available on pins. Under signal name, the first
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column is the name on the schematic associated with the GPIO, the second
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comes from: http://arduino.cc/en/Hacking/PinMappingSAM3X, and the third
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is the name of the multiplexed SAM3X UART function from the data sheet.
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This is more than a little confusing.
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------------------------------------------------------------------
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PIO SIGNAL NAME CONNECTOR PIN
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DUE SCHEM. PIN MAPPING SAM3X DUE SCHEM. BOARD LABEL
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----- ---------- -------------- ----------- ---------- -----------
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PA8 [U]RX RX0 UART0 URXD PWML 1 RX0<-0
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PA9 [U]TX TX0 UART0 UTXD PWML 2 TX0->1
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PD5 RXD0 RX3 USART3 RXD3 COMM 2 RX3
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PD4 TXD0 TX3 USART3 TXD3 COMM 1 TX3
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PA12 RXD1 RX2 USART1 RXD1 COMM 4 TX2
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PA13 TXD1 TX2 USART1 TXD1 COMM 3 RX2
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PA10 RXD2 RX1 USART0 RXD0 COMM 6 RX1
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PA11 TXD2 TX1 USART0 TXD0 COMM 5 TX1
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PB21 AD14(RXD3) Digital Pin 52 USART2 RXD2 XIO 33 33
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PB20 AD11(TXD3) Analog In 11 USART2 TXD2 ADCH 4 A11
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The outputs from these pins is 3.3V. You will need to connect RS232
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transceiver to get the signals to RS232 levels (or connect the pins to the
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USB virual COM port.
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transceiver to get the signals to RS232 levels (or connect to the
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USB virual COM port in the case of UART0).
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Loading Code
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^^^^^^^^^^^^
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Installing the Arduino USB Driver under Windows:
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------------------------------------------------
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1. Download the Windows version of the Arduino software, not the 1.0.x
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release but the latest 1.5.x that supports the Due. When the download
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finishes, unzip the downloaded file.
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2. Connect the Due to your computer with a USB cable via the Programming port.
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3. The Windows driver installation should fail.
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4. Open the Device Manger
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5. Look for the listing named "Ports (COM & LPT)". You should see an open
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port named "Arduino Due Prog. Port".
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6 Select the "Browse my computer for Driver software" option.
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7. Right click on the "Arduino Due Prog. Port" and choose "Update Driver
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Software".
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8. Navigate to the folder with the Arduino IDE you downloaded and unzipped
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earlier. Locate and select the "Drivers" folder in the main Arduino folder
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(not the "FTDI USB Drivers" sub-directory).
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Uploading NuttX to the Due Using Bossa:
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---------------------------------------
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I don't think this can be done because the Arduino software is so dedicated
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to "sketches". However, Arduino uses BOSSA under the hood to load code and
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you can use BOSSA outside of Arduino.
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Uploading NuttX to the Due Using Bossa:
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---------------------------------------
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Generic BOSSA installation files are avaialable here:
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http://sourceforge.net/projects/b-o-s-s-a/?source=dlp
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However, DUE uses a patched version of BOSSA available as source code here:
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https://github.com/shumatech/BOSSA/tree/arduino
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But, fortunately, since you already installed Arduino, you already have
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BOSSA installed here. In my installation, it is here:
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C:\Program Files (x86)\Arduino\arduino-1.5.2\hardware\tools\bossac.exe
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Where is some sample output from a Windows CMD.exe shell. NOTE that my
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Arduino programming port shows up as COM26. It may be different on your
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system.
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To enter boot mode, set the baud to 1200 and send anything to the
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programming port:
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C:\Program Files (x86)\Arduino\arduino-1.5.2\hardware\tools>mode com26:1200,n,8,1
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Status for device COM26:
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------------------------
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Baud: 1200
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Parity: None
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Data Bits: 8
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Stop Bits: 1
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Timeout: ON
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XON/XOFF: OFF
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CTS handshaking: OFF
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DSR handshaking: OFF
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DSR sensitivity: OFF
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DTR circuit: ON
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RTS circuit: ON
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C:\Program Files (x86)\Arduino\arduino-1.5.2\hardware\tools>bossac.exe --port=COM26 -U false -i
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Device : ATSAM3X8
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Chip ID : 285e0a60
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Version : v1.1 Dec 15 2010 19:25:04
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Address : 524288
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Pages : 2048
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Page Size : 256 bytes
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Total Size : 512KB
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Planes : 2
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Lock Regions : 32
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Locked : none
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Security : false
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Boot Flash : false
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In a Cygwin BaSH shell:
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export PATH="/cygdrive/c/Program Files (x86)/Arduino/arduino-1.5.2/hardware/tools":$PATH
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Erasing, writing, and verifying FLASH with bossac:
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$ bossac.exe --port=COM26 -U false -e -w -v -b nuttx.bin -R
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No device found on COM26
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This error means that there is code running on the Due already so the
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bootloader cannot connect. Pressing reset and trying again
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$ bossac.exe --port=COM26 -U false -e -w -v -b nuttx.bin -R
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No device found on COM26
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Sill No connection because Duo does not jump to bootloader after reset.\
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Press ERASE button and try again
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$ bossac.exe --port=COM26 -U false -e -w -v -b nuttx.bin -R
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Erase flash
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Write 86588 bytes to flash
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[==============================] 100% (339/339 pages)
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Verify 86588 bytes of flash
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[==============================] 100% (339/339 pages)
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Verify successful
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Set boot flash true
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CPU reset.
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Other useful bossac things operations.
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a) Write code to FLASH don't change boot mode and don't reset. This lets
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you examine the FLASH contents that you just loaded while the bootloader
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is still active.
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$ bossac.exe --port=COM26 -U false -e -w -v nuttx.bin
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Write 64628 bytes to flash
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[==============================] 100% (253/253 pages)
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Verify 64628 bytes of flash
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[==============================] 100% (253/253 pages)
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Verify successful
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Set boot flash true
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Verify the FLASH contents (the bootloader must be running)
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$ bossac.exe --port=COM26 -U false -v nuttx.bin
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Verify 64628 bytes of flash
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[==============================] 100% (253/253 pages)
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Verify successful
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Read from FLASH to a file (the bootloader must be running):
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$ bossac.exe --port=COM26 -U false --read=4096 nuttx.dump
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Read 4096 bytes from flash
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[==============================] 100% (16/16 pages)
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Change to boot from FLASH
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$ bossac.exe --port=COM26 -U false --boot=1
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Set boot flash true
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Uploading NuttX to the Due Using JTAG:
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-------------------------------------
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The JTAG/SWD signals are brought out to a 10-pin header JTAG connector:
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PIN SIGNAL JTAG STANDARD NOTES
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--- -------------- ----------------- --------------------------------
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1 3.3V VTref
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2 JTAG_TMS SWDIO/TMS SAM3X pin 31, Pulled up on board
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3 GND GND
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4 JTAG_TCK SWDCLK/TCK SAM3X pin 28, Pulled up on board
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5 GND GND
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6 JTAG_TDO SWO/EXta/TRACECTL SAM3X pin 30, ulled up on board
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7 N/C Key
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8 JTAG_TDI NC/EXTb/TDI SAM3X pin 29, Pulled up on board
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9 GND GNDDetect
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10 MASTER-RESET nReset
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You should be able to use a 10- to 20-pin adaptr to connect a SAM-ICE
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debugger to the Arduino Due. I have this Olimex adapter:
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https://www.olimex.com/Products/ARM/JTAG/ARM-JTAG-20-10/ . But so far I
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have been unable to get the get the SAM-ICE to communicate with the Due.
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Arduino DUE-specific Configuration Options
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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@ -616,7 +787,7 @@ Configuration sub-directories
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1. The configuration configuration can be modified to include support
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for the on-board SRAM (1MB).
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System Type -> External Memory Configuration
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System Type -> External Memory Configuration
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CONFIG_ARCH_EXTSRAM0=y : Select SRAM on CS0
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CONFIG_ARCH_EXTSRAM0SIZE=1048576 : Size=1MB
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@ -625,7 +796,7 @@ Configuration sub-directories
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a) To enable the NuttX RAM test that may be used to verify the
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external SRAM:
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System Type -> External Memory Configuration
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System Type -> External Memory Configuration
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CONFIG_ARCH_EXTSRAM0HEAP=n : Don't add to heap
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Application Configuration -> System NSH Add-Ons
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@ -659,7 +830,7 @@ Configuration sub-directories
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b) To add this RAM to the NuttX heap, you would need to change the
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configuration as follows:
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System Type -> External Memory Configuration
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System Type -> External Memory Configuration
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CONFIG_ARCH_EXTSRAM0HEAP=y : Add external RAM to heap
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Memory Management
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@ -78,7 +78,6 @@
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*/
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#define BOARD_CKGR_PLLAR_MUL (13 << PMC_CKGR_PLLAR_MUL_SHIFT)
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#define BOARD_CKGR_PLLAR_STMODE PMC_CKGR_PLLAR_STMODE_FAST
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#define BOARD_CKGR_PLLAR_COUNT (63 << PMC_CKGR_PLLAR_COUNT_SHIFT)
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#define BOARD_CKGR_PLLAR_DIV PMC_CKGR_PLLAR_DIV_BYPASS
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