Other Parts Discussed in Thread: SYSCONFIG
Tool/software:
I'm prototyping on the lp-mspm0g3519 board and ran into this perplexing problem where the program gets hung up on the __COMPILER_BARRIER() step in the __NVIC_EnableIRQ() function. In the snippet below, I hang at the __COMPILER_BARRIER() step if I uncomment the UART5 enable line. I see the hanging step when I pause the debugger. My UART5 is configured identically to UART0 in sysconfig and UART0 works just fine. Please help, I am stuck! Does this mean I need to disable cache?
...
NVIC_EnableIRQ(UART0_INT_IRQn);
//NVIC_EnableIRQ(UART5_INT_IRQn); // can't enable this line
NVIC_EnableIRQ(GPIOB_INT_IRQn);
NVIC_EnableIRQ(TIMG12_INT_IRQn);
...
/**
\brief Enable Interrupt
\details Enables a device specific interrupt in the NVIC interrupt controller.
\param [in] IRQn Device specific interrupt number.
\note IRQn must not be negative.
*/
__STATIC_INLINE void __NVIC_EnableIRQ(IRQn_Type IRQn)
{
if ((int32_t)(IRQn) >= 0)
{
__COMPILER_BARRIER(); // this is where my program gets stuck
NVIC->ISER[0U] = (uint32_t)(1UL << (((uint32_t)IRQn) & 0x1FUL));
__COMPILER_BARRIER();
}
}
