Honored ContributorHi,
when I make three tasks synchronized by semaphores (the tasks do nothing, they only make a Post and then a Pend to pass the control each other), after a number of iterations (this number is ever the same) the program is blocked. If I put a delay after the Pend, the number of iterations grew, but after this number of iterations the program crash. Why?? Thanks
Honored ContributorIt should work, yes
Honored ContributorHi Italian,
I know that this post is a bit old, but if you didn't already solved your problem I have a suggest for you. I took a look to your code and I saw the call to OSInit() function: :evil: you don't have to call it because it is already called within alt_main() function that is called before your main()! If you do it, that function initialize os structure, included semaphre, mailbox, queue, etc... If you call it a second time after one in alt_main() you will re-assign all previously initialized semaphore (e.g. uart one, jtag one, etc)!!! CiaoHonored ContributorHonored Contributoralt_main() is the first C code called from the assembler startup code, it initialises things like stdin and stdout, then calls the uses's main().
Honored ContributorMoreover alt_sys_init() also instantiate and init all device you foreseen in your pld (e.g. ALTERA_AVALON_UART_INSTANCE and ALTERA_AVALON_UART_INIT); this has the consequence that isr function for uart is anyway linked and included in your firmware also if you provide another one written by yourself.
alt_sys_init() function is in your source file named as alt_sys_init().c and you can find it within syslib folder or bsp folder. Ciao
