stm32h7:Serial Use Idel to poll RX DMA
stm32h7:Serial Do not loop in an ISR!
stm32h7:Serial signal txdma completion with semaphore
stm32h7:Serial Apply formatting suggestions from code review
Co-authored-by: Mateusz Szafoni <raiden00pl@gmail.com>
stm32h7: Serail Add Power Managment (Untested)
arch: Allocate the space from the beginning in up_stack_frame
and modify the affected portion:
1.Correct the stack dump and check
2.Allocate tls_info_s by up_stack_frame too
3.Move the stack fork allocation from arch to sched
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
For unknown reasons this message may interferre with the calibration
procedure and result in invalid calibariton data.
We leave only a message informing about the end of the the calibration.
The problem was observed for STM32G4 + IHM16M1.
Change the logic for allocating user heap for PROTECTED_BUILD:
- Don't rely on SRAM1_END alignment
- Make better use of MPU subregions when allocating the heap
- Don't duplicate the calculation of user heap start in kernel heap
allocation; use the previous calculation directly
Signed-off-by: Jukka Laitinen <jukkax@ssrc.tii.ae>
All supported arch uses a push-down stack:
The stack grows toward lower addresses in memory. The stack pointer
register points to the lowest, valid working address (the "top" of
the stack). Items on the stack are referenced as positive(include zero)
word offsets from sp.
Which means that for stack in the [begin, begin + size):
1.The initial SP point to begin + size
2.push equals sub and then store
3.pop equals load and then add
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
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That field is never used and, in most cases, is never initialized correctly.
This should have no impact to anything with the possible exception of free-running drivers.
Verified using CI builds only.
The comments at the top of the file say this:
```
This will be automatically registered
* - AXI SRAM is a 512kb memory area. This will be automatically registered
* with the system heap in up_allocate_heap, all the other memory
* regions will be registered in arm_addregion().
```
but the implementation was using SRAM123 instead. Furthermore, arm_addregion then re-adds SRAM123 again.
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This change makes it so that the timeout is set as part of the SDIO_WAITENABLE call instead of the SDIO_EVENTWAIT call. By doing so, you eliminate all opportunity for a race condition.
stm32h7:sdmmc Check if busy ended early
1.To support the different MCU in series(e.g. cortex-m0+)
2.It's redundant since we already specify in compliler option
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
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Several licenses were missed in the initial work
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Normally, statically allocated data goes in .bss, followed by the
initial stack, followed by HEAP. However, any data that is statically
allocated in SRAM4 with __attribute__ ((section (".sram4"))) will
clobber, and be clobbered by, the HEAP.
On STM32H7, BDMA can only access SRAM4. Therefore any BDMA buffers (or
any other data) placed in SRAM4 will expose this problem. In one case,
this manifested as a failure of NSH to start, because the SPI6 BDMA
buffers clobbered the /dev/console inode structs, which the OS
allocated earlier.
This PR ensures that only the rest of SRAM4, after any static data, is
added to the heap. This PR also allows SRAM4 to be completely excluded
from the heap by a new Kconfig, CONFIG_STM32H7_SRAM4EXCLUDE, similar
to what CONFIG_STM32H7_DTCMEXCLUDE does for the DTCM region.
Change required in linker scripts:
Every STM32H7 linker script must replace this:
.sram4 :
{
} > sram4
with this:
.sram4_reserve (NOLOAD) :
{
*(.sram4)
. = ALIGN(4);
_sram4_heap_start = ABSOLUTE(.);
} > sram4
or link will fail with: undefined reference to '_sram4_heap_start'.
The Release Notes should document this for users with out-of-tree
boards.
arch/arm/src/stm32h7/Kconfig:
* Add config STM32H7_SRAM4EXCLUDE to allow excluding all of SRAM4
from the HEAP.
arch/arm/src/stm32h7/stm32_allocateheap.c:
* Only when including SRAM4 in the heap, define HAVE_SRAM4,
SRAM4_START, SRAM4_END, and SRAM4_HEAP_START.
* Add "Private Data" section.
* Add extern for_sram4_heap_start, which must be defined in the
board's linker script.
* arm_addregion(): Only add SRAM4 to the heap when configured to
do so, i.e., unless CONFIG_STM32H7_SRAM4EXCLUDE is defined, and
only add the portion of SRAM4 that is past any static data.
boards/arm/stm32h7/nucleo-h743zi/scripts/flash.ld:
boards/arm/stm32h7/nucleo-h743zi/scripts/kernel.space.ld:
boards/arm/stm32h7/nucleo-h743zi2/scripts/flash.ld:
boards/arm/stm32h7/stm32h747i-disco/scripts/flash.ld:
boards/arm/stm32h7/stm32h747i-disco/scripts/kernel.space.ld:
* Update all in-tree STM32H7 board linker scripts as described in
"Change required in linker scripts" above.
Testing:
* Successfully built all of the following configurations:
nucleo-h743zi2:jumbo
nucleo-h743zi2:nsh
nucleo-h743zi:nxlines_oled
nucleo-h743zi:elf
nucleo-h743zi:otg_fs_host
nucleo-h743zi:nsh
nucleo-h743zi:netnsh
nucleo-h743zi:pwm
stm32h747i-disco:nsh
* Tested with custom board.
* nxstyle.
References:
[1] See the dev@nuttx.a.o mailing list discussion started 2021/03/25:
"How to ensure HEAP will not overlap static DMA buffer?"
https://lists.apache.org/thread.html/recf2bb9043f8c9f53c10917e2adb2ec64fe35dc5e6f9a695a7ac6ecc%40%3Cdev.nuttx.apache.org%3E
[2] See arm_addregion() in arch/arm/src/stm32h7/stm32_allocateheap.c
Thanks to Gregory Nutt and David Sidrane for suggestions and reviews.
The maximum number of samples which can be handled without overrun depends on various factors.
This is the user's responsibility to correctly select this value.
Since the interfece to update the sampling time is available for all supported devices,
the user can change the default vaules in the board initialization logic and avoid ADC overrun.
arch/arm/src/stm32h7/stm32_dma.c:
* Include <inttypes.h> explicitly for format specifiers.
* In functions stm32_mdma_capable(), stm32_mdma_dump(),
stm32_sdma_setup(), stm32_sdma_capable(), stm32_sdma_dump(),
stm32_bdma_setup(), stm32_bdma_capable(), stm32_bdma_dump(),
stm32_dmamux_dump(), stm32_dmachannel(), stm32_dmafree(), and
stm32_dmadump():
Where appropriate, use format specifiers from <inttypes.h> in
calls to dmainfo(). This removes numerous compiler warnings
like:
warning: format '%x' expects argument of type 'unsigned int',
but argument 3 has type 'uint32_t {aka long unsigned int}'
[-Wformat=]
* In function stm32_mdma_disable():
Remove wrong redefinition of 'dmachan' parameter as a local
variable. This fixes the following compiler error that occurs
when building with CONFIG_STM32H7_MDMA:
chip/stm32_dma.c:930:17: error: 'dmachan' redeclared as
different kind of symbol
DMA_CHANNEL dmachan = (DMA_CHANNEL)handle;
^~~~~~~
chip/stm32_dma.c:928:44: note: previous definition of 'dmachan'
was here
static void stm32_mdma_disable(DMA_CHANNEL dmachan)
^~~~~~~
chip/stm32_dma.c:930:43: error: 'handle' undeclared (first use
in this function); did you mean 'random'?
DMA_CHANNEL dmachan = (DMA_CHANNEL)handle;
^~~~~~
random
For example Windows RNDIS driver issues SETUP requests that are 76 bytes
long. Previously NuttX would read them all, but only if they arrive at
the same time. If host transfer scheduling causes a pause between the
two DATA packets, stm32_ep0out_receive() would proceed with an incomplete
transfer. The rest of the data could either be skipped by the error handler
branch, or be left in NAK state forever, stopping any further communication
on the endpoint.
This commit changes it so that the whole transfer has to be received before
SETUP handler is called. Depending on CONFIG_USBDEV_SETUP_MAXDATASIZE any
excess bytes will be discarded, but doing this in a controlled way ensures
deterministic behavior. In the specific case of RNDIS, the trailing bytes
are unused padding bytes and can be safely discarded.
