bubulindo
Member
Hello,
I've been reading up and going through the libmaple files and I can't see how to set up interrupts. I'm quite interested in starting the W5100 interface with the Maple (I have one of the initial versions that has the connection pins on the side connectors), but I'd like to get an interrupt set up for the communication.
Is there any information regarding this?
gbulmer
Moderator
bubulindo - there are a coupe of different ways to handle this.
Any General Purpose I/O (GPIO) pin can be used to detect an external signal, and raise an interrupt:
http://leaflabs.com/docs/external-interrupts.html
or specific hardware interfaces e.g. SPI can raise a specific type of interrupt when an SPI event happens.
All of this is described in ST Micro's STM32F103 manual RM0008:
http://www.st.com/internet/com/TECHNICAL_RESOURCES/TECHNICAL_LITERATURE/REFERENCE_MANUAL/CD00171190.pdf
If you explain the type of interrupt or use case that you are aiming to solve, we might be able to help more.
bubulindo
Member
I'm coming from the AVR type of microcontrollers and I like to program in C. So I am looking into keeping the same kind of coding while using the Maple.
I'm quite interested in writing some libraries too, but for that I'll need to properly read the STM32 manual. Also, is there any documentation online regarding the ARM gcc? I didn't find any.
gbulmer
Moderator
All interrupt handlers are written in C.
The mechanism at
http://leaflabs.com/docs/external-interrupts.html
is very similar to Arduino.
Some peripherals, e.g. Timers, have an attachInterrupt() too.
All of the peripherals have one or more entries in the interrupt table. Your interrupt handler is written in C, and gets linked in by using the correct name.
I've just had a quick look and I can't see the file with all the names, maybe someone can say which one it is. There is names.inc which looks right, but I can't find where it is included.
The documentation for GCC is at http://gcc.gnu.org/onlinedocs/
and it contains a specific section on ARM options.
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