MSPM0L1306: How to do disable existing interrupts for some time and then enable them

Hi Wayne,

I'm not familiar enough with C2000, but MSP430 has one global interrupt enable (GIE), which disables/enables all interrupts using DINT, EINT style instructions.

For the MSMP0 family, the customer has two options; one is disable specific NVIC, the other is the peripheral.

Examples:

NVIC -> NVIC_EnableIRQ(TIMER_0_INST_INT_IRQN);

Peripheral ->  DL_TimerG_enableInterrupt(TIMER_0_INST , DL_TIMERG_INTERRUPT_ZERO_EVENT);

Does this help?

Dear Dennis,

If there are many interrupts that have been enabled during initialization

(say, SysTick_IRQn, GPIOA_INT_IRQn, TIMG1_INT_IRQn, ADC0_INT_IRQn, UART1_INT_IRQn),

then can the user use the above methods to disable them all once in a statement?

For example,

NVIC -> NVIC_DisableIRQ(SysTick_IRQn|GPIOA_INT_IRQn|TIMG1_INT_IRQn|ADC0_INT_IRQn|UART1_INT_IRQn);

NVIC -> NVIC_EnableIRQ(SysTick_IRQn|GPIOA_INT_IRQn|TIMG1_INT_IRQn|ADC0_INT_IRQn|UART1_INT_IRQn);

rather than disable and enable one by one in many statements.

Do you think it possible?

Dear Dennis,

Would you please also refer to this?

https://developer.arm.com/documentation/dui0662/b/Cortex-M0--Peripherals/Nested-Vectored-Interrupt-Controller/Interrupt-Clear-Enable-Register?lang=en

https://developer.arm.com/documentation/dui0662/b/Cortex-M0--Peripherals/Nested-Vectored-Interrupt-Controller/Interrupt-Set-Enable-Register?lang=en

Do you think it reasonable to use CLRENA[31:0]/SETENA[31:0] to disable all interrupts and enable them again all at once?

If yes, how do we write codes in TI driverlib API or in CMSIS API or else?

Dear Dennis,

It seems there is a better way to use bit 0 of PRIMASK (PM).

In P168 of TRM, it says below,

In ARM M0+ TRM, it also says the same.

https://developer.arm.com/documentation/ddi0484/c/Programmers-Model/Instruction-set-summary?lang=en

Would you please help confirm if it works and how we can use it in C codes?

For example, by TI driverlib API, by CMSIS API below or by calling embedded assembly directly by using asm()?

https://www.keil.com/pack/doc/cmsis/Core/html/group__Core__Register__gr.html#ga70b4e1a6c1c86eb913fb9d6e8400156f

https://www.keil.com/pack/doc/cmsis/Core/html/group__Core__Register__gr.html#ga0f98dfbd252b89d12564472dbeba9c27

Is it possible to call asm() to use CPSID, CPSIE directly?

asm(" CPSID i");
asm(" CPSIE i");

Dear Dennis,

Thank you for your update.

One more question, in our TRM (P168) and in CMSIS links I showed above, it mentions CPSID, CPSIE only works in privileged mode only.

Do you have any idea what "privileged mode" is?

Does that mean we need to do something to enable privileged mode? Has this been done in our Sysconfig somewhere?

Hi Wayne,

I forgot to add that ...In the Cortex-M0 processor, the processor always executes in privileged state. Unprivileged Thread mode is not available.