• A nasty feature of RTX
    Hello, Why does not RTX implement a reference counter for its "tsk_lock"/"tsk_unlock" mechanism? The way things are implemented at the moment, any task that calls "tsk_unlock" enables the scheduler...
  • Behavior of idle
    Hi, whats the behavior of idle regarding CAPCOM units? I observed the following: I have a 1 ms timer and a Sleep function based on the timer. The sleep function checks the elapsed time and if not...
  • AT91SAM9260 unexpected SPI behavior
    Hi, I got some problems using SPI. I use the following code: #include <AT91SAM9260.H> /* AT91SAM9260 definitions */ #include <lib_AT91SAM9260.h> /* Library function definitions */ int main (void...
  • Strange behavior of the "smmls" instruction
    I try to optimize my code by substituting a pair of smull and sub instructions with one smmls instruction, but the smmls gives the wrong result! This is the test case: mov32 r1, #0x8000d286 mov32...
  • Strange RTX behavior with bootloader
    Hi dear ARM fellows, Firstly, let me introduce the context. I am developping a RTX/RL software for a custom board based on a LPC2388 µC. I was using an old version of MDK-ARM and RL-ARM to develop...