Because the LPC81X HAL implementation calls error(), which in turn calls
fprintf(), quite a bit of code is added to the image, which is not a good
idea on such resource constrained targets.
The new RawSerial class is a simple wrapper over the serial HAL that can
be safely used from an interrupt handler.
Interrupt chaining code was removed from InterruptIn, Serial and Ticker
because it caused lots of issues with the RTOS. Interrupt chaining is
still possible using the InterruptManager class.
Because CT32B1 (P1_1, P1_2 and P1_3) is used by us_ticker.c for wait and ticker function. Since wait/ticker is commonly used by mbed code and I decided CT32B1 of LPC11XX should only be used for this function, not for PwmOut.
P1_6 and P1_7 are used by UART (USBTX/USBRX) and I think they should not be assigned to other function.
DEVICE_STDIO_MESSAGES is the only #define in device.h that is being used in the library as #ifdef rather than #if. This is misleading since setting it to 0 will not disable including the <stdio.h> libraries.
A recent commit, 43acaa4166, to get _sbrk() to build successfully for
LPC2368 broke the Cortex-M implementation. __get_MSP() isn't ever
defined as a macro, it is an inline function. This means that the
code would always be compiled to use SP instead of MSP on Cortex-M
parts. I switched the code to instead use the TARGET_ARM7 define
to choose which stack pointer to utilize.
I tested this fix by making sure that the LPC2368 version of the mbed
SDK would still build successfully with the Python scripts and that the
NET1 test still built and ran successfully on my mbed-LPC1768 device.
Fault is triggered by trying to read LPC_CAN1->IER when the peripheral is powered off. Fixed by checking the power control register before checking the IER register.
While fixing this issue in the various LPC* ports, I noticed a comment
pointing to this mbed forum post which summarizes this bug quite well:
https://mbed.org/forum/bugs-suggestions/topic/4473/
This bug was introduced in the following commit:
2662e105c4
The following code was added to serial_putc() as part of this commit:
uint32_t lsr = obj->uart->LSR;
lsr = lsr;
uint32_t thr = obj->uart->THR;
thr = thr;
As the forum post indicates, this causes the serial_putc() routine to
actually eat an inbound received byte if it exists since reading THR is
really reading the RBR, the Receiver Buffer Register. This code looks
like code that was probably added so that the developer could take a
snapshot of these registers and look at them in the debugger. It
probably got committed in error.
LPC11U24/LPC11U24_301/LPC11U35_401 shared the same startup file for ARM
and uARM toolchains, which is wrong, because the initial SP value is
different for LPC11U24_301. This commit fixes this issue by giving each
target its own startup file.
There were lots of overlaps in the code for LPC810 and LPC812, including
duplicated source files. This commit adds a TARGET_LPC81X_COMMON folder in
both HAL and CMSIS, this folder keeps common code for the targets.
If the FileBase::lookup operation in the constructor of FilePath returns
NULL, subsequent operations (such as isFile()/isFileSystem()) will call
methods on a NULL 'fb' pointer. This commit fixes this issue by adding
explicit NULL checks and a new method in FilePath (exists()).
1. Added: GCC_CR toolchain ID for LPC2368. (targets.py)
2. Modified: Startup codes for GCC_ARM and GCC_CR toolchain.
3. Verified: "ticker" and "basic" test program work well, so far.
(Fixed typo.)
1. Added: GCC_CR toolchain ID for LPC2368. (targets.py)
2. Modified: Startup codes for GCC_ARM and GCC_CR toolchain.
3. Verified: "ticker" and "basic" test program works well, so far.
I verified that the hang issue I was seeing when building and running
the mbed official networking tests with GCC_ARM was related to this
issue reported on the mbed forums:
http://mbed.org/forum/mbed/topic/3803/?page=1#comment-18934
If you are using the 4.7 2013q1 update of GCC_ARM or newer then it
will have a _sbrk() implementation which checks the new top of heap
pointer against the current thread SP, stack pointer.
See this GCC_ARM related thread for more information:
https://answers.launchpad.net/gcc-arm-embedded/+question/218972
When using RTX RTOS threads, the thread's stack pointer can easily
point to an address which is below the current top of heap so this
check will incorrectly fail the allocation.
I have added a _sbrk() implementation to the mbed SDK which checks the
heap pointer against the MSP instead of the current thread SP. I have
only enabled this for TOOLCHAIN_GCC_ARM as this is the only GCC based
toolchain that I am sure requires this.
A new hooks mechanism (hooks.py) allows various targets to customize
part(s) of the build process. This was implemented to allow generation of
custom binary images for the EA LPC4088 target, but it should be generic
enough to allow other such customizations in the future. For now, only the
'binary' step is hooked in toolchains/arm.py.
Peter's and my changes to LPC1768.ld ended up adding the same AHBSRAM0
and AHBSRAM1 section clauses to the script twice. I removed one copy.
I also pulled Peter's define of the ETHMEM_SECTION macro up into the
previous nested #if so that the preprocessor wouldn't spit out a
redefined macro warning.
I verified that building the code clean before and after these changes
still results in the same .bin file but now without warnings and/or
duplicate code.
The original script assigned memory ranges to USB_RAM and ETH_RAM but
it never placed any section data in those regions. I added clauses
towards the bottom of the script to place data that the programmer
has marked for the AHBSRAM0 and AHBSRAM1 sections into these regions
of RAM. Previously the data destined for these sections was being
placed in the lower 32K RAM bank and overflowing it at link time.
I also added a few Image$$ linker symbols to mimic those used by the
online compiler. I have had samples in the past which took advantage
of these to display static memory statistics for each SRAM region.
I also changed LENGTH=0x7F38 to LENGTH=(32K - 0xC8) to make it more
consistent with the sizing of the other regions in this script which
use human readable K sizing information. The 0xC8 subtraction reflects
the starting offset of 0xC8 for this region.
i2c_frequency() compares a uint32_t ref variable to the int hz
function parameter passed in by the caller. I forced this to be an
uint32_t comparison.
i2c_slave_write() declared i and count variables to be of type uint32_t
but used them as int type throughout the code (in comparisons and
returns) so I switched them to be of signed int type.
spi_frequency() contains a change similar to that made in
i2c_frequency().
This commit targets the KL25Z code, whereas previous ones targetted
similar issues in the LPC1768 and LPC11U24 mbed HAL code.
These changes were made to silence GCC warnings and fix potential bugs
where they would never be equal when the enumeration wasn't a 32-bit
type.
For example, pinmap.c used to contain this code:
if (pin == (uint32_t)NC) return;
I switched it to:
if (pin == (PinName)NC) return;
I wonder why this casting to uint32_t was done in the first place?
Maybe another supported compiler requires it?
This commit targets the LPC11U24 code, whereas a previous one
targetted similar issues in the LPC1768 mbed HAL code.
These changes were made to silence GCC warnings and fix potential bugs
where they would never be equal when the enumeration wasn't a 32-bit
type.
For example, pinmap.c used to contain this code:
if (pin == (uint32_t)NC) return;
I switched it to:
if (pin == (PinName)NC) return;
I wonder why this casting to uint32_t was done in the first place?
Maybe another supported compiler requires it?
The original code was:
if(LPC_CAN1->IER | LPC_CAN2->IER != 0) {
This would actually be interpreted as:
if(LPC_CAN1->IER | (LPC_CAN2->IER != 0)) {
I simplified it to:
if(LPC_CAN1->IER | LPC_CAN2->IER) {
With the comparison removed, the GCC warning no longer fires since the
user's intent is no longer unclear. However, the end result should be
the same.
These were done to silence GCC warnings and fix potential bugs where
they would never be equal when the enumeration wasn't a 32-bit type.
For example, common/pinmap_common.c used to contain this code:
if (pin == (uint32_t)NC)
I switched it to:
if (pin == (PinName)NC)
I wonder why this casting to uint32_t was done in the first place?
Maybe another supported compiler requires it?
Joe Turner
Bogdan Marinescu
Joris Aerts
0xc0170
Andreas Rebert
Bogdan Marinescu
Bogdan Marinescu
Michael Conners
Emilio Monti
Toyomasa Watarai
Adam Green
dinau
Erik Olieman
unknown
Toyomasa Watarai
ytsuboi
pbrier