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Difference between revisions of "CW308T-STM32F"

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(Supported Devices)
(Example Projects)
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== Example Projects ==
 
== Example Projects ==
  
WARNING: The current example projects are built for the -01 rev of the PCB. The only change is the trigger pin has changed, you will need to modify the stm32f4 HAL file to reflect the trigger is now PA12 (-02 version) instead of PA11 (-01 version).
+
SimpleSerial builds for each of the STM32Fx Devices.
  
 
== Schematic ==
 
== Schematic ==

Revision as of 09:53, 21 April 2017

CW308T-STM32F
Cw308 stm32f.jpg
Target Device ST STM32F
Target Architecture Cortex M0,M3,M4
Hardware Crypto Possible
Design Files

GITHub Link

OSH Park PCBs
Supported Apps Simple Serial Enc/Auth
Programmer ST-LINK/V2
Status Released

Supported Devices

The STM32F board supports several STM32F devices in the TQFP-64 package. Various solder jumpers need to bet set to either the "A" or "B" position to select appropriate VCC supply for the different series. The following table summarizes examples of suitable devices:

STM32F Series Package Device Hardware AES Tested Jumper
F0 TQFP-64 STM32F071RBT6 No B*
F1 TQFP-64 B
F2 TQFP-64 A
F3 TQFP-64 STM32F303R8T6 Yes No B
F4 TQFP-64 STM32F415RGT6 Yes Yes A

* The F0 variant has a slightly different pinout, as has less VCC/GND pins and more I/O pins than other devices. The result is several I/O pins cannot be used as they are tied to VCC/GND. This will NOT affect regular usage. See details below.

VCC-Int Supply

Several devices (F2, F4) have internal core voltage regulators. By default the CW308 board attempts to provide power for these pins, but the voltage may not be high enough to cause the internal regulator to disable itself. In this case you can use the VADJ regulator to ensure the internal regulator is disabled. See Targets with Internal Regulators for details.

Pin-outs across TQFP Devices

The following shows differences in pinouts between three groups of devices. The left-most is the STM32F051RB, which uses the same 3.3V VCORE as the STM32F1/F3. It has fewer VCC pins, so the I/O occupying that are VCC/GND pins on the STM32F1 (such as PF6/PF7) are tied to GND/VCC. The right-most part is the pinout of the STM32F2/F4. It has an internal regulator, where the VCAP pins are the output of this regulator (and input to the internal core logic).

Power diffstm32.png

Note for the devices with a 3.3V VCORE, you should not mount decoupling capacitors C5/C6/C7/C8. You will still get some leakage with those capacitors mounted, but a stronger signal is present without them.

Hardware AES

The STM32F21x, and STM32F41x/43x have hardware crypto modules (AES, DES, TDES) along with hardware hash (SHA1, MD5).

Programming Connection

The 20-pin JTAG port (J6 on CW308 Board) can be used with the ST-LINK/V2 which is a low-cost JTAG programmer.

It is also possible to use other JTAG programmers such as OpenOCD. The following command worked with an Olimex OpenOCD programmer and their OpenOCD for Windows software:

openocd 
  -f path/to/board/files/cw308.cfg 
  -c init 
  -c targets 
  -c "halt" 
  -c "flash write_image erase path/to/firmware.hex"       
  -c "verify_image path/to/firmware.hex"        
  -c "reset run" 
  -c shutdown

where the contents of cw308.cfg are

source [find interface/olimex-arm-usb-ocd-h.cfg]
source [find target/stm32f4x.cfg]
reset_config srst_only

Example Projects

SimpleSerial builds for each of the STM32Fx Devices.

Schematic

CW308T STM32F 02.png