slide for COSCUP 2013 PS: The source of this practice will be released later on github and have an issue which SPI unable to start successfully now. prototype temporary source code with F4OS and sdp_tcp: https://github.com/benwei/F4OS/tree/feature/coscup2013-stm32-net

1. Real practice of Networking
design on specialized
for
ARM Cortex-M
Ben Wei (a.k.a ben6)
2013/08/03

2. Right’s to copy
Attribution – ShareAlike 3.0
You are free
• to copy, distribute, display, and perform the work
• to make derivative works
• to make commercial use of the work
Under the following conditions
• For any reuse or distribution, you must make clear to others the license terms of this work.
• Any of these conditions can be waived if you get permission from the copyright holder.
Your fair use and other rights are in no way affected by the above.
Attribution. You must give the original author credit.
Share Alike. If you alter, transform, or build upon this work, you may distribute the
resulting work only under a license identical to this one.
© Copyright 2013 juluos
http://juluos.org
License text: http://creativecommons.org/licenses/by-sa/3.0/legalcode

3. Who am I?
• Current
o JuluOSDev, StarOS Lab
• Bio
Love to try new technologies and
enjoy researching topics in networking
and operation system domains
http://about.me/ben6

4. Agenda
• Why real practice topic?
• Hardware Overview
• Development experience sharing

5. Why? Connect Internet of Things
Internet
of Things

6. thingsquare

7. thingsquare

8. thingsquare

9. thingsquare

10. Thingsqure Tech Overview
Thingsqure
of Services
Things
Contiki-OS Router

11. Connect Apps with things
Connecting thermostats, light
bulbs, street lights, and more

12. Real Practice
Prototype
Cortex-M Hardware with Ethernet adapter

14. enc28J60STM32F407VGT6
USB-Serial Controller
Prolific 2303

15. STM32F407VGT6
• 32-bit ARM® Cortex™-M4-based
STM32-F4
• 168MHz, upto 210 MIPS
• 1MB Flash, 192KB RAM
ST-LINK
USB for
Input
USB 2.0
OTG

16. Architecture diagram
Network Adapter
Driver
TCPIP Stack (UIP, lwIP, SDP …)
Application 1 Application 2 Application n
Firmware
Hardware
ARM Board

17. Ethernet Adapter

18. Adapter Survery
SPI Ethernet Adapter

19. SPI Interface
SPI
Master
SCLK
MOSI
MISO
CS
SPI
Slave
SCLK
MOSI
MISO
CS
Serial Peripheral Interface Bus，SPI

20. What’s SPI? (Input)
MSB (I) LSB (I)
Open

21. What’s SPI? (Output)
MSB LSB
ignore

22. Driver – enc28j60
Base on SPI Command with OP Code
SPI Commands:
RCR, RBM, WCR, WBM, BFS, BFC, SC
Op Code argument data
Byte 0 Byte 1

23. enc28j60 Ethernet adapter
SPI pinout
PA5 = SCK
PA6 = MISO
PA7 = MOSI
PE7 = CS

24. ENC28J60 Pinouts
Buffer

25. Development
Experience Sharing

26. F4OS

27. F4OS
git://github.com/benwei/F4OS.git
-- Fork from prattmic/F4OS

28. F4OS

29. Architecture diagram
Network Adapter
En28j60 Driver
TCPIP Stack (SDP)
Shell
F4OS
Hardware
ARM Board
Simple Server

30. Toolchain
launchpad.net/gcc-arm-
embedded/+download

31. Debugging
• USB Serial Controller
• STM32 STlink

32. USB Serial Console Mac OS X as example
1
Screen is your good friend
sudo screen /dev/tty.usbserial 115200
2

33. st-util wait gdb
ben@xubuntu:~/src/github/stlink$ ./st-util
2012-06-10T22:56:32 INFO src/stlink-usb.c: -- exit_dfu_mode
2012-06-10T22:56:32 INFO src/stlink-common.c: Loading device parameters....
2012-06-10T22:56:32 INFO src/stlink-common.c: Device connected is: F4
device, id 0x20006411
2012-06-10T22:56:32 INFO src/stlink-common.c: SRAM size: 0x30000 bytes
(192 KiB), Flash: 0x100000 bytes (1024 KiB) in pages of 16384 bytes
Chip ID is 00000413, Core ID is 2ba01477.
KARL - should read back as 0x03, not 60 02 00 00
init watchpoints
Listening at *:4242...
Listening at *:4242
./st-util

34. gdb with st-util
~/F4OS$ arm-none-eabi-gdb
GNU gdb (Sourcery CodeBench Lite 2012.03-56) 7.2.50.20100908-cvs
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law. Type "show copying"
and "show warranty" for details.
This GDB was configured as "--host=i686-pc-linux-gnu --target=arm-none-
eabi".
For bug reporting instructions, please see:
<https://support.codesourcery.com/GNUToolchain/>.
(gdb) target remote :4242
Remote debugging using :4242
0x007f3ff4 in ?? ()
target remote :4242

35. How to build F4OS?
$ git://github.com/benwei/F4OS.git
$ cd F4OS_prototype
$ make clean
$ make
$ make burn
GCC_ARM_PATH="/opt/gcc-arm-none-eabi-4_7-2013q1/bin"
STLINK_PATH="$SH_PATH/stlink”
export PATH="$PATH:$GCC_ARM_PATH:$STLINK_PATH"
1
2

36. Write bin file to F4
$ make burn
st-flash write ./out/f4os.bin 0x8000000
2013-08-01T13:28:57 INFO src/stlink-common.c: Loading device parameters....
2013-08-01T13:28:57 INFO src/stlink-common.c: Device connected is: F4 device, id 0x20006411
2013-08-01T13:28:57 INFO src/stlink-common.c: SRAM size: 0x30000 bytes (192 KiB), Flash:
0x100000 bytes (1024 KiB) in pages of 16384 bytes
2013-08-01T13:28:57 INFO src/stlink-common.c: Attempting to write 30540 (0x774c) bytes to stm32
address: 134217728 (0x8000000)
EraseFlash - Sector:0x0 Size:0x4000
Flash page at addr: 0x08000000 erasedEraseFlash - Sector:0x1 Size:0x4000
Flash page at addr: 0x08004000 erased
2013-08-01T13:28:57 INFO src/stlink-common.c: Finished erasing 2 pages of 16384 (0x4000) bytes
2013-08-01T13:28:57 INFO src/stlink-common.c: Starting Flash write for F2/F4
2013-08-01T13:28:57 INFO src/stlink-common.c: Successfully loaded flash loader in sram
size: 30540
2013-08-01T13:28:58 INFO src/stlink-common.c: Starting verification of write complete
2013-08-01T13:28:58 INFO src/stlink-common.c: Flash written and verified! jolly good!
st-flash write ./out/f4os.bin 0x8000000

37. Demo
Environment Demo

38. Summary
• Why Stm32 Networking?
• Hardware Prototype：
o STM32F4 Discovery + ENC28J60 + PL2303
• Experience Sharing & Development tips
o How to build, burn, debug tools

39. ?
Q & A

40. compile stlink in ubuntu
sudo apt-get install autoconf libusb-1.0.0
sh autogen.sh
./configure
make
Tips: please don't install, just use export PATH=~/stlink/:$PATH
For easier update

41. STM32F407VGT6
• microcontroller featuring 32-bit ARM Cortex-M4F core, 1 MB Flash, 192
KB RAM in an LQFP100 package
• On-board ST-LINK/V2 with selection mode switch to use the kit as a
standalone ST- LINK/V2 (with SWD connector for programming and
debugging)
• LIS302DL, ST MEMS motion sensor, 3-axis
• digital output accelerometer
• MP45DT02, ST MEMS audio sensor, omni- directional digital microphone
• CS43L22, audio DAC with integrated class D speaker driver
• Eight LEDs:
• USB OTG FS with micro-AB connector
• Extension header for all LQFP100 I/Os for quick connection to prototyping
board and easy probing
More - reference DM00037955.pdf

42. References
• ENC28J60 programming guide
• http://thingsquare.com/tech/
• http://www.contiki-os.org/
• STM32F4DISCOVERYDiscovery kit

43. CMSIS/Device/ST/STM32F4xx/Include/stm32f4xx.h
STM32F4 Working MHz (F4OS)
#define PLL_M 25
#define PLL_M 8
-DHSE_VALUE=8000000
boot/boot_main.c
1
2