PMP configurations for load and store addresses may
have different permissions (e.g., "R" vs. "RW").
Due to the timing alignment of internal signals, the address
permission check may be incorrectly applied during the second
part of a misaligned access transaction.
As a workaround, insert two instructions (e.g. ADDI/NOP) between
accessing to different memory regions. This spacing avoids the
false permission check caused by signal timing overlap.
The following changes are made in this commit:
1. This commit updates the implementation of usleep() to now always yield
CPU time if undergoing a multi-tick sleep. This reduces the accuracy of
usleep() but in turn allows the scheduler to schedule different tasks.
2. The commit also updates the MCPWM unit test which fails due to the
change in the behavior of usleep().
Closes: https://github.com/espressif/esp-idf/pull/15132
This commit updates usleep() to always sleep for the required sleep
period or more. This fixes a bug where the usleep() could sleep for less
than the request sleep period.
Closes https://github.com/espressif/esp-idf/pull/15132
This option replaces implementations of functions from ROM:
- memcpy
- memcmp
- memmove
- str[n]cpy
- str[n]cmp
The functions used in the firmware will be better optimized for misaligned
memory. Here are some measurements in CPU cycles for 4096-byte buffers:
memcpy: 28676 -> 4128
memcmp: 49147 -> 14259
memmove: 33896 -> 8086
strcpy: 32771 -> 17313
strcmp: 32775 -> 13191
fix(heap): fixed CONFIG_HEAP_PLACE_FUNCTION_INTO_FLASH not working together with CONFIG_HEAP_TLSF_USE_ROM_IMPL
See merge request espressif/esp-idf!37692
Currently, the new line ending conversion options for stdin and stdout
are specifically described for UART, which is inaccurate since the
console could be connected to USB serial/CDC or have secondary output.
Use a generic console term instead of UART.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
The configuration of newline endings for stdout and stdin is supported
only by the VFS drivers. The write and read syscalls in newlib
automatically convert LF to CRLF for stdout and CR to LF for stdin,
ignoring the configured newline settings. Therefore, make the options
for newline endings visible only when VFS is enabled.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
Currently, the newline conversions for the NEWLIB_STDOUT_LINE_ENDING and
NEWLIB_STDIN_LINE_ENDING options are only applied by VFS drivers.
Without VFS, newline conversion does not occur. Introduce the default
conversion of LF to CRLF on stdout and CF to LF on stdin for the default
read and write syscalls in newlib.
Signed-off-by: Frantisek Hrbata <frantisek.hrbata@espressif.com>
Alexey Lapshin
Marius Vikhammer
Marek Fiala
morris
Frantisek Hrbata
Sudeep Mohanty
Stephen Noonan
Chen Jichang
igor.udot
gaoxu
Ivan Grokhotkov
Konstantin Kondrashov