Print undecode chip_id too

[fw/stlink] / README

diff --git a/README b/README
index c94177bac1714011fc1926386e9254c94260c4fb..1eb6d26173fa48103d0036d284afa27889eb22c1 100644 (file)
--- a/README
+++ b/README
@@ -1,15 +1,97 @@
+IMPORTANT SHORT TERM NOTICE:
+If you are targetting F1 devices, with either stlinkv1 or v2 hardware, you
+_need_ to use karlp's libwork2 branch.  
+
+If you are targetting F4, you _need_ to use texane's master
+
+If you are targetting F2 or L1, please let us know how it goes!
+

 HOWTO
 =====
 
 HOWTO
 =====
 

+First, you have to know there are several boards supported by the software.
+Those boards use a chip to translate from USB to JTAG commands. The chip is
+called stlink and there are 2 versions:
+. STLINKv1, present on STM32VL discovery kits,
+. STLINKv2, present on STM32L discovery and later kits.
+
+2 different transport layers are used:
+. STLINKv1 uses SCSI passthru commands over USB,
+. STLINKv2 uses raw USB commands.
+
+Common requirements
+~~~~~~~~~~~~~~~~~~~
+
+libusb-1.0  (You probably already have this, but you'll need the 
+development version to compile)
+
+IF YOU HAVE AN STLINKv1
+~~~~~~~~~~~~~~~~~~~~~~~
+The STLINKv1's SCSI emulation is very broken, so the best thing to do
+is tell your operating system to completely ignore it.
+
+Options (do one of these before you plug it in)
+   *) modprobe -r usb-storage && modprobe usb-storage quirks=483:3744:i
+or *)1. add "options usb-storage quirks=483:3744:i" to /etc/modprobe.conf
+   *)2. modprobe -r usb-storage && modprobe usb-storage
+or *)1. cp stlink_v1.modprobe.conf /etc/modprobe.d
+   *)2. modprobe -r usb-storage && modprobe usb-storage
+
+IF YOU HAVE AN STLINKv2
+~~~~~~~~~~~~~~~~~~~~~~~
+
+You're ready to go :)
+

 To run the gdb server, do (you do not need sudo if you have set up
 permissions correctly):
 To run the gdb server, do (you do not need sudo if you have set up
 permissions correctly):

-$ make -C build && sudo ./build/st-util 1234 /dev/sg1
+$ make && [sudo] ./gdbserver/st-util 
+
+There are a few options:

 
 

-Then, in gdb:
-(gdb) target remote :1234
+./gdbserver/st-util - usage:
+
+  -h, --help        Print this help
+  -vXX, --verbose=XX    specify a specific verbosity level (0..99)
+  -v, --verbose specify generally verbose logging
+  -s X, --stlink_version=X
+            Choose what version of stlink to use, (defaults to 2)
+  -1, --stlinkv1    Force stlink version 1
+  -p 4242, --listen_port=1234
+            Set the gdb server listen port. (default port: 4242)
+
+Then, in gdb: (remember, you need to run an _ARM_ gdb, not an x86 gdb)
+(gdb) target remote :4242

 
 Have fun!
 
 
 Have fun!
 

+Resetting the chip from GDB
+===========================
+
+You may reset the chip using GDB if you want. You'll need to use `target
+extended-remote' command like in this session:
+(gdb) target extended-remote localhost:4242
+Remote debugging using localhost:4242
+0x080007a8 in _startup ()
+(gdb) kill
+Kill the program being debugged? (y or n) y
+(gdb) run
+Starting program: /home/whitequark/ST/apps/bally/firmware.elf 
+
+Remember that you can shorten the commands. `tar ext :4242' is good enough
+for GDB.
+
+Setting up udev rules
+=====================
+
+For convenience, you may install udev rules file, 49-stlinkv*.rules, located
+in the root of repository. You will need to copy it to /etc/udev/rules.d,
+and then either reboot or execute
+$ udevadm control --reload-rules
+
+Udev will now create a /dev/stlinkv2_XX or /dev/stlinkv1_XX file, with the appropriate permissions.
+This is currently all the device is for, (only one stlink of each version is supported at 
+any time presently)
+

 Running programs from SRAM
 ==========================
 
 Running programs from SRAM
 ==========================
 


@@ -28,6 +110,7 @@ If you would link your executable to 0x08000000 and then do
 (gdb) load firmware.elf
 then it would be written to the memory.
 
 (gdb) load firmware.elf
 then it would be written to the memory.
 

+

 FAQ
 ===
 
 FAQ
 ===
 


@@ -45,3 +128,24 @@ Q: At some point I use GDB command `next', and it hangs.
 A: Sometimes when you will try to use GDB `next' command to skip a loop,
 it will use a rather inefficient single-stepping way of doing that.
 Set up a breakpoint manually in that case and do `continue'.
 A: Sometimes when you will try to use GDB `next' command to skip a loop,
 it will use a rather inefficient single-stepping way of doing that.
 Set up a breakpoint manually in that case and do `continue'.

+
+Currently known working combinations of programmer and target
+=============================================================
+
+STLink v1 (as found on the 32VL Discovery board)
+
+Known Working Targets:
+* STM32F100xx (Medium Density VL)
+* STM32F103 (according to jpa- o n##stm32
+
+No information:
+* everything else!
+
+
+STLink v2 (as found on the 32L and F4 Discovery boards)
+Known Working Targets:
+* STM32F100xx (Medium Density VL, as on the 32VL Discovery board)
+* ?
+
+Please report any and all known working combinations so I can update this!
+