I've selected the types of memory layouts from reference manuals:
STM32L0x1 Ref Manual: http://st.com/resource/en/reference_manual/DM00108282.pdf
Table 5. NVM organization (category 1 devices)
Single bank - 16 KBytes
Table 6. NVM organization (category 2 devices)
Single bank - 32 KBytes
Table 7. NVM organization (category 3 devices)
Single bank - 64 KBytes
**Table 8. NVM organization for UFB = 0 (192 Kbyte category 5 devices) - id =
0x447 STM32L0xx (Cat.5)
Dual bank - 96 Kbytes for bank
Table 10. NVM organization for UFB = 0 (128 Kbyte category 5 devices) - id =
0x447 STM32L0xx (Cat.5)
Dual bank - 64 Kbytes for bank**
Table 12. NVM organization for UFB = 0 (64 Kbyte category 5 devices)
Single bank - 64 KBytes
STM32L0x2 Ref Manual: http://st.com/resource/en/reference_manual/DM00108281.pdf
STM32L0x3 Ref Manual: http://st.com/resource/en/reference_manual/DM00095744.pdf
Table 5. NVM organization (category 3 devices)
Single bank - 64 KBytes
**Table 6. NVM organization for UFB = 0 (192 Kbyte category 5 devices) - id =
0x447 STM32L0xx (Cat.5)
Dual bank - 96 Kbytes for bank
Table 8. NVM organization for UFB = 0 (128 Kbyte category 5 devices) - id =
0x447 STM32L0xx (Cat.5)
Dual bank - 64 Kbytes for bank**
Table 10. NVM organization for UFB = 0 (64 Kbyte category 5 devices)
Single bank - 64 KBytes
STM32Lxxxx Ref Manual: http://st.com/resource/en/reference_manual/CD00240193.pdf
Table 8. NVM module organization (Cat.1 and Cat.2 devices)
Single bank - 128 KBytes
Table 9. NVM module organization (Cat.3 devices)
Single bank - 256 KBytes
**Table 10. NVM module organization (Cat.4 devices) - id = 0x436 STM32L1xx
(Cat.4/Cat.3 - Medium+/High Density)
Dual bank - 192 Kbytes for bank
Table 11. NVM module organization (Cat.5 devices) - id = 0x437 STM32L1xx
(Cat.5/Cat.6)
Dual bank - 256 Kbytes for bank
Table 12. NVM module organization (Cat.6 devices) - id = 0x437 STM32L1xx
(Cat.5/Cat.6)
Dual bank - 192 Kbytes for bank**
id = 0x447 STM32L0xx (Cat.5) <- dual bank, for flash size 192 or 128 KBytes,
single bank for 64 KBytes
id = 0x436 STM32L1xx (Cat.4/Cat.3 - Medium+/High Density) <- only one size of
bank, default values are correct
id = 0x437 STM32L1xx (Cat.5/Cat.6) <- always dual bank, but size of bank can be
different
Perhaps is easier to base on memory sizes and ids to select correct bank size
values like here: http://openocd.zylin.com/#/c/4074/
?
Or of course if you will have more clear idea with option bytes usage, I will
be also perfectly happy to use your solution :).
---
** [tickets:#148] STM32L0x: flash size and dual bank support**
**Status:** new
**Milestone:** 0.9.0
**Created:** Sun Mar 19, 2017 01:47 AM UTC by Aurelio Lucchesi
**Last Updated:** Sun Mar 19, 2017 03:42 PM UTC
**Owner:** nobody
Flash programming large binaries to my STM32L082 board failed,
and I had to recompile OpenOCD in order to make it work.
Without modification, it looks like this:
~~~
$ openocd -f interface/stlink-v2.cfg -f target/stm32l0.cfg -c "program
build/prj.elf reset exit verify"
...
Info : Device: STM32L0xx (Cat.5)
Info : STM32L flash has dual banks. Bank (0) size is 128kb, base address is
0x8000000
...
Error: checksum mismatch - attempting binary compare
diff 0 address 0x08020000. Was 0x3e instead of 0x69
diff 1 address 0x08020001. Was 0x79 instead of 0x21
diff 2 address 0x08020002. Was 0x79 instead of 0x3d
diff 3 address 0x08020003. Was 0x74 instead of 0x59
diff 4 address 0x08020004. Was 0x6f instead of 0x59
diff 5 address 0x08020005. Was 0x73 instead of 0x5f
...
~~~
Then I've realized that there are two flash program memory banks:
STM32L0xx category 5 MCUs come with 192 KiB of Flash program memory:
* Bank 1: starting at 0x0800 0000, size 96 KiB
* Bank 2: starting at 0x0801 8000, size 96 KiB
So I've added a second one to a copy of the stm32l0.cfg script:
~~~
# flash size will be probed
set _FLASHNAME $_CHIPNAME.flash
flash bank $_FLASHNAME stm32lx 0x08000000 0 0 0 $_TARGETNAME
# add second flash bank
set _FLASHNAME $_CHIPNAME.flash1
flash bank $_FLASHNAME stm32lx 0x08018000 0x18000 0 0 $_TARGETNAME
~~~
But that revealed another problem:
~~~
$ openocd -f interface/stlink-v2.cfg -f ./stm32l0.cfg -c "program
build/prj.elf reset exit verify"
...
Info : Device: STM32L0xx (Cat.5)
Info : STM32L flash has dual banks. Bank (0) size is 128kb, base address is
0x8000000
Warn : couldn't use loader, falling back to page memory writes
Info : Device: STM32L0xx (Cat.5)
Warn : STM32L flash bank base address config is incorrect. 0x8018000 but should
rather be 0x8000000 or 0x8020000
Error: auto_probe failed
** Programming Failed **
shutdown command invoked
~~~
So I tried to fix things by rebuilding OpenOCD, and changed the size of
the first (and second) flash page in src/flash/nor/stm32lx.c:261 from
128 to 96 KiB:
~~~
{
.id = 0x447,
.revs = stm32_447_revs,
.num_revs = ARRAY_SIZE(stm32_447_revs),
.device_str = "STM32L0xx (Cat.5)",
.page_size = 128,
.pages_per_sector = 32,
.max_flash_size_kb = 192,
.first_bank_size_kb = 96, // 128,
.has_dual_banks = true,
.flash_base = 0x40022000,
.fsize_base = 0x1FF8007C,
},
~~~
That actually works for my hardware with the modified cfg script:
~~~
$ ~/git/openocd/src/openocd -f interface/stlink-v2.cfg -f ./stm32l0.cfg -c
"program build/prj.elf reset exit verify" --search
~/git/openocd/tcl
Open On-Chip Debugger 0.10.0+dev-00093-g6b2acc02 (2017-03-18-23:04)
...
Info : Device: STM32L0xx (Cat.5)
Info : STM32L flash has dual banks. Bank (0) size is 96kb, base address is
0x8000000
Warn : couldn't use loader, falling back to page memory writes
Info : Device: STM32L0xx (Cat.5)
Info : STM32L flash has dual banks. Bank (1) size is 96kb, base address is
0x8018000
Info : ignoring flash probed value, using configured bank size: 96kbytes
...
** Verified OK **
** Resetting Target **
~~~
So I've asked on IRC and tried to submit a really simple patch for that:
http://openocd.zylin.com/#/c/4073/
But like Cezary pointed out: This **does not solve the problem of all STM32L0**
Category 5 (or 3) devices, since they all have a different memory layout...
See also:
http://openocd.zylin.com/#/c/3554/
STM32L0x1 Ref Manual: http://st.com/resource/en/reference_manual/DM00108282.pdf
STM32L0x2 Ref Manual: http://st.com/resource/en/reference_manual/DM00108281.pdf
STM32L0x3 Ref Manual: http://st.com/resource/en/reference_manual/DM00095744.pdf
I don't have access to other hardware to test things out nor enough knowledge
about OpenOCD to really fix the issue for all cases...
-----
Possible solutions that came to mind:
1) Don't use hardcoded size values. - Like Karl Palsson pointed out:
Using the probed flash size (fsize_base/flash_size_in_kb, 0x1FF8004C on
STM32L0x2,
33.1.1 Flash size register) and the device ID (32.4.1 MCU device ID code,
stm32lx_read_id_code()), it should be possible to figure out the exact flash
memory layout (size, addresses, dual bank).
2) Hardcode the values for all possible combinations for all STM32L0 MCU
types/categories code the sizes.
3) Maybe the easiest: Make it possible to change first_bank_size_kb in a
config script? Or is this already possible somehow?
I'd like to help fixing this issue...
---
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