As the first 4 pages of the bootloader will always keep write protection
once read protection is applied, with the second update of the bootloader
only the higher pages where updated effectivly.
In most cases this resulted in an inaccessible device!
This is a questionable fix for the Kinetis K22F that samples
this pin on release from reset to enable its EzPort which
makes the flash unusable and disables the rest of the micro.
Although the devices are only documented to have 64K flash,
they have been obeserved to have a full 128K, although the undocumented
half may be untested and have problems.
1) This version uses a direction control level shifters. We need to control
the direction of the TMS/SWDIO pin.
2.1) Because we want to support a large voltage range for SRST we use an
external dual MOSFET for asserting and sensing the SRST line. We have
added the hardware version 3 to be handled the same way as version 0.
Meaning using separate pins for assertion and sensing of the SRST line.
2.2) The new SRST sense circuit is inverting, thus we have dedicated
code for hardware version 3 that inverts the SRST status pin on read.
I was stuck trying to debug the issue why my probe would not find any attached targets. This is because I was doing the pin mapping as per the comments, and not the actual code. There is a mismatch!
This PR updates the comment to reflect the values set in code. :)
This adds a new function to the internal target interface
to allow the target to get control before reset is complete
so that it can do any additional work. On this target there
is a proprietary internal bit that has to be reset in some
cases to allow the core to continue operating.
BMPM V2 uses a biasing resistor for the true switch mosfet circuit.
Because of that the weak pull-up/down of the stm32 is not asserting the
correct gate voltage for the mosfets to fully switch through. Because of
that we need to use open drain configulation of the GPIO instead.
- Remove connect_assert_srst global.
- Attach functions always release reset.
- Platforms provide a method to poll the reset pin.
- Reset on scan is all internal to command.c
- Reset is released on a failed scan. Fixes#111
All BMPM2 prototypes after revision a have their LED0 and LED2 inverted.
Because of that we have bumped the hardware revision to swap the LEDs in
software. This is easier than messing up the routing of the LEDs.
If you try to read out the GPIO immediately after setting the weak pull
on the pin it is possible that you will not read the correct value on a
floating pin. We need to use a busy wait loop instead of the
platform_delay because the platform timing is not initialized yet. We
also can not initialize the platform_delay code yet because it requires
LED gpio to be configured. A busy wait seems to do the job and is easier
than refactoring the codebase to use the platform_delay function.
This change has also a practical reason. When flashing and testing the
hardware this change makes it easier to make sure all the LEDs work. Now
when the DFU bootloader is idle it is scanning the LEDs making it easy
to see if one of them has an issue.
In addition to that, the bootloader now indicates when there is data
being flashed using the DFU interface. In cases when one has more than
one device connected and accidently starts flashing a wrong device this
is very useful feature to have.
Until now the native hardware was pulling PB5-7 down and checking if
they were asserted high. BMPMV2b is pulling the pins down instead of
high. The hardware version routine now determines the hardware version
based on the fact if a pin is asserted at all. This means that if a pin
is left floating, the version number bit will be 0, and if the pin is
asserted either high or low the bit will be set to 1. While we were
already at it the "monitor version" command in GDB will now also print
the hardware version number.
USB_VBUS is not an alternate function, it is an additionnal function which is
always enabled.
If configured as an alternate function, it will draw current from VBUS.
All source files include general.h first and before anything else.
This inlcludes platform.h and platform_support.h
No header file needs to include to include any of these, but should include
any others needed for it's own declarations.
Hello,
appended 3 patches
- adds a dfu-bootloader appliaction
- uses absolute delays when waiting for pull-up delays on the STLINK
(hopefully fixes issue #30)
Updating the dfu-bootloader by additional application is helpfull for the
STLINK, as for flashing the bootloader by SWDb otherwise jumpers need to be
soldered or external SWD is not possible.
Use like:
- dfu-util -s 0x08002000:leave -D dfu_upgrade.bin
- dfu-util -s 0x08000000:leave -D blackmagic_dfu.bin
- Push reset buttom and reconnect to enter new dfu bootloader
- dfu-util -s 0x08002000:leave -D blackmagic.bin
--
Uwe Bonnes bon@elektron.ikp.physik.tu-darmstadt.de
Institut fuer Kernphysik Schlossgartenstrasse 9 64289 Darmstadt
--------- Tel. 06151 162516 -------- Fax. 06151 164321 ----------
>From fae5022c304a8866f056ea66660ac7ce3809dcf8 Mon Sep 17 00:00:00 2001
From: Uwe Bonnes <bon@elektron.ikp.physik.tu-darmstadt.de>
Date: Sun, 20 Oct 2013 15:00:36 +0200
Subject: F1: Prepare to update dfu bootloader via DFU with additional
application.
o Prevent probe from inadvertently powering target. If PWR_BR is
allowed to float, the gate on Q1 (blackmagic_mini) will tend to be
close enough to zero to turn the transistor on. We activate the
internal pull-up on this IO pin to force the transistor off.
This patch introduces a new command, "connect_srst [enable|disable]"
which allows to enable special mode in which SRST would be pulled low
before the SWD scan till attaching to a target.
Since on Cortex-Mx the SRST signal doesn't gate JTAG and SWD, it's
possible to connect to a target while holding reset, ask it to stop at
reset vector and only then deassert reset, thus allowing to attach to
the kind of firmware that goes immediately to sleep or disables
debugging by other means early on start.
Tested on an STM32VLDiscovery board with STM32F100 configured to go to
STOP mode and executing WFI in the very beginning of main().
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
USB UART seems to work fine at 115.2Kbps or 230.4Kbps, but starts to drop characters
as the data rate goes higher. This commit changes the usbuart ISR to fill a software
FIFO, and adds a low priority timer interrupt to run deferred processing to drain a
FIFO and send USB CDCACM packets, rather than calling the usb send within the UART
ISR.
Tested on native platform, up to 1.5MBps.
With gcc-arm-none-eabi-4_7-2013q1-20130313 and -O2 I get
text data bss dec hex filename
45744 304 2376 48424 bd28 blackmagic
With -Os the results are even more impressive:
text data bss dec hex filename
37900 304 2376 40580 9e84 blackmagic
Since -Os might lower the debugging speed, do not enable it yet in the
absence of real measurements.
Signed-off-by: Paul Fertser <fercerpav@gmail.com>
The introduction of the double buffering broke USB flow control, causing
loss of data when a new packet arrived with the previous still present in
the double buffer.
With this patch the endpoint is kept in NAK until the double buffer is empty.
- stm32_mem.py has problems with erasing the big pages, but dfu-util works
- serial GDB remote server doesn't work. It neither works for the STM32F107,
so maybe there is a problem with the usbd_f107_driver.
Uwe Bonnes
Gareth McMullin
Piotr Esden-Tempski
Param Aggarwal
Chuck McManis
bvernoux
Antti Nykänen
Nicolas Schodet
Fredrik Ahlberg
Richard Eoin Meadows
Frantisek Burian
Michael Tharp
Marc Singer
Paul Fertser
Gareth McMullin
Allen Ibara
Vegard Storheil Eriksen