• M4 Assembly - Set Enable also enables the Clear Enable Interrupt Register
    Hi, I have some assembly for Cortex M4 (Arm 7M Thumb), I want to enable an interrupt that is connected to a push button on an STM32 F407. It works, but for some reason when I enable the set enable register...
  • Bit-Banding. Only 1 bit at a time?
    Hi, I am developing a fixed-point MP3 & ACELP decoder on an Arduino Due. I realize that bit-banding makes a RMW sequence atomic but I notice fields in the Due hardware are multi-bit fields. Is there an...
  • Enable Reentrant interrupt handlers in kinetis K70
    I have a TWR-K70F120M: kinetis k70 120MHz Tower System Module. I have connected a elettric signal to PORTB and i have connected e isr handler to signal transition. Electric signal      _____         ...
  • UXTB only Thumb2?
    Note: This was originally posted on 12th February 2009 at http://forums.arm.com Hi All, Arm9 crashed on UXTB instruction because it is not able to decode it. It caused Undef-Instruction exception. I have...
  • How should I do if I want to enable only one single CPU on a Cortex A9 MPCore(2 CPUs)
    Hi, all When I was porting Minix 3 OS to Zedboard (Zynq 7000 All Programmable SoC) the system always hanged at refresh_tlb. What's strange is that refresh_tlb had been performed at KERNEL booting up,...