【转帖】【STM32团队】STM32 bootloading with UART1

Hi Thomas, I experimented with ST Flash Loader Demonstrator 1.0 with the STM32 Primer to investigate possible alternate upload times on a virgin part. Some temporary hardware mods were needed. Here is what I found.

1) The STM32 chip must be a revision B - for the system boot mode code to be present at 1fffff000-1fffff800.
2) Some Primers are fitted with revision A others with revision B.  the chip is marked ARM A  or ARM B.
3) J3 is not a Jtag connector for the STM32.
4) The STM32 JTAG is hard-wired to the rlink DONGLE.
5) I could not get the Flash Loader Demonstrator to run faster than 9600 or 19200 baud, yet UART1 worked fine at 115200 in my circleos Application. See question below?
6) I could not get Flash Loader Demonstrator to work at all on a desktop PC, it only worked on my laptop.
7) ST will not release the source for the system-boot-mode code
8) The System boot mode code memory is not reprogrammable by users.
9) The Flash Loader Demonstator programmed quicker than it read because it had an option to not reprogram ff's

Does the Flash Loader Demonstator work OK at 115200 BAUD on your Keil board???????
(I suspect my RS232 level converter may be the problem - but its more likely a timing problem at the PC end).

This capability could useful in the field as a last resort reprogramming method for devices with a UART1 interface because it does not require the end user to have development tools.

From past experience with other chip makers it is possible ST may change this system boot mode facility. It may be unwise to assume it stays compatible with revision B. Especially since it appears it does not work at 115200 with my hardware.

Last edited by Stewee (2008-01-08 21:01:48)

System Bootloader documentation says the STM32 system boot loader autobauds, the PC starts by sending 0x7F, the STM32 bootloader detects the baud rate from this right at the start after boot.

Its disappointing that 115k does not solve the speed problem.

There probably are no revision A 48pin and 100pin chips because revision A is an early engineering samples release.

References;-
System boot mode specification; http://www.st.com/stonline/products/lit … /13801.pdf
Flash loader demonstrator is listed here;   http://www.st.com/mcu/familiesdocs-110.html
Download the demonstrator here;  http://www.st.com/stonline/products/sup … um0462.zip
Get the documentation here; http://www.st.com/stonline/products/lit … /13916.pdf

Last edited by Stewee (2008-01-16 04:08:06)

# 5   2008-01-28 12:25:19 STM32 bootloading with UART1

I m using the flash loader with an STM32 eval board and it works fine, the only pain is to activate or desactivate  the read/write protection, and unfortunately the tool don't provide this features, somone can tell me if I can do it manually with the HyperTerminal for example?

Last edited by Microfun (2008-01-28 21:12:59)

>Please specify how many kbytes were transferred, how long it took,

10kb in 6 sec, using HEX file as input, 115200 baud, but 5 sec to click and select each time :-)
I am too not happy about the speed, and the user must re-select all things all the time,
I suggest you make the PC bootloader program more friendly to be used as development programmer,
this will animate more users to get started with STM32, since they dont even need to purchase Rlinks or other JTAG
devices to get up and running.
more STM32 freaks = more cool projects= more devices sold = ST happy or not ?

If you have a STM32 Primer, there is already a RLink embedded on the Primer, and you don't need any other programmer. If you want to program your own board, you can use the standard Raisonance RLink. You just need to install RIDE7 + the ARM kit (both are on the CD supplied with the Primer).

hi, thanks for halp. I have raisonance toolkit for the ARM family,  Ride7 with programmer R-Link. The dev board  make myself. I use capabilitie for the JTAG-ARM, This capabilitie works on STR711FR2 bat don`t works on STM32F103C8T6. mabe need other capabilitie or perhaps all controller STM32 iz damaged (I test alreade 3 contollers).
I writing hex file in the controller bat contoller don`t runing. Halp me please. Sory for grammar error. I am from Georgia is Tbilisi. Thanks for all.

FYI: recently we received a board (with STM32) from a customer who reported that RLink was not able to program it. At the end, we found the issue:  the VDDA pin was  not properly powered (VDDA supplies the power for the PLL, the reset block...).  Conclusion: the problem could be again with VCC/VDDA/..

As said by Thomas, RLink manages the communication at different steps.  The "connection to RLink" and the read of the RLink' Serial Number is the very first step. Then, you should try to check whether the IdCode of the STM32 is read. then you could try to erase the chip, then... I suggest that you make these tests with the command line utility: cortex_pgm.exe.

page 45 in the performance datasheet say you can use 4-16MHz crystal
all JTAG systems uses an external clocked syncronious serial connection,
so it dont care at all about your crystal frequency.

see page 49 of the refference manual !
you simply select the divider PLLXTPRE so your 14 MHz is now 7 into the PLL,
then you can step it up again to all desired frequencies,
some precautions exist when writing to PLL and clock source bits, so see page 57 before trying to change bits.
7 x 10 = 70, but you can not make 48MHz for USB !!
so I assume you dont want to use USB ?
if so you MUST change the crystal to one that can give a PLL running at 48MHz

Last edited by ThomasScherrer (2008-02-20 17:26:51)