Add a "used" attribute to interruptVectors to fix ARMC6 build with
the "-flto" flag.
(Error: L6236E: No section matches selector - no section to be FIRST/LAST. )
This attribute, attached to a function/variable, means that code must be emitted
for the function even if it appears that the function is not referenced.
Add a "used" attribute to ulDebugHeader (placed in signature_section section)
to fix ARMC6 build with the "-flto" flag. (Error: L6236E: No section matches
selector - no section to be FIRST/LAST. )
This attribute, attached to a function, means that code must be emitted
for the function even if it appears that the function is not referenced.
ARM Compiler 6.13 testing revealed linker errors pointing out
conflicting use of `__user_setup_stackheap` and
`__user_initial_stackheap` in some targets. Remove the unwanted
`__user_initial_stackheap` from the targets - the setup is
centralised in the common platform code.
Looking into this, a number of other issues were highlighted
* Almost all targets had `__initial_sp` hardcoded in assembler,
rather than getting it from the scatter file. This was behind
issue #11313. Fix this generally.
* A few targets' `__initial_sp` values did not match the scatter
file layout, in some cases meaning they were overlapping heap
space. They now all use the area reserved in the scatter file.
If any problems are seen, then there is an error in the
scatter file.
* A number of targets were reserving unneeded space for heap and
stack in their startup assembler, on top of the space reserved in
the scatter file, so wasting a few K. A couple were using that
space for the stack, rather than the space in the scatter file.
To clarify expected behaviour:
* Each scatter file contains empty regions `ARM_LIB_HEAP` and
`ARM_LIB_STACK` to reserve space. `ARM_LIB_STACK` is sized
by the macro `MBED_BOOT_STACK_SIZE`, which is set by the tools.
`ARM_LIB_HEAP` is generally the space left over after static
RAM and stack.
* The address of the end of `ARM_LIB_STACK` is written into the
vector table and on reset the CPU sets MSP to that address.
* The common platform code in Mbed OS provides `__user_setup_stackheap`
for the ARM library. The ARM library calls this during startup, and
it calls `__mbed_user_setup_stackheap`.
* The default weak definition of `__mbed_user_setup_stackheap` does not
modify SP, so we remain on the boot stack, and the heap is set to
the region described by `ARM_LIB_HEAP`. If `ARM_LIB_HEAP` doesn't
exist, then the heap is the space from the end of the used data in
`RW_IRAM1` to the start of `ARM_LIB_STACK`.
* Targets can override `__mbed_user_setup_stackheap` if they want.
Currently only Renesas (ARMv7-A class) devices do.
* If microlib is in use, then it doesn't call `__user_setup_stackheap`.
Instead it just finds and uses `ARM_LIB_STACK` and `ARM_LIB_HEAP`
itself.
Removed private TODO file.
Fixed cmsis.h so that renaming of CS and DIR_H is not necessary any more.
Leave pinmap.h unchanged although it should include stdint.h
Moved stdint.h to PinNames.h instead, where it is also used.
Reworked system startup (clock configuration) to be more flexible
(different clock sources for MCLK and SMCLK, configurable clock dividers).
Fixed Copyright headers
Changed default clock settings for MSP432 Launchpad to
MCLK 48 MHz (HFXT) and SMCLK 24 MHz (HFXT)
Remove mbed_rtx.h
Added common mbed_rtx.h file (merge with lastest master)
Added support for IAR toolchain
Fixed some astyle problems.
Added support for ARM C5/C6 toolchains
Small changes to us_ticker implementation after port testing.
Changed default clock configuration to DCO (MCLK 48MHz, SMCLK 24MHz).
De-configured the LFXT crysal, because this made the system_reset() test to time out.
Removed MPU from device_has list. Changed clock source to HFXT.
Reworked startup_msp432p401r.c -> now only one startup file for all compilers.
Changed all linker scripts to delete VECTORS stuff (not needed).
Moved position of MSP432 in targets.json so TI stuff is in one block.
Maciej Bocianski
Kevin Bracey
Andreas Terstegge
Lin Gao