for Kinetis why is __enable_irq and __disable_irq commented out when using CMSIS

steve_fae — Wed, 01 Mar 2017 02:34:39 GMT

Customer writing code using CMSIS library finds __enable_irq and __disable_irq is commented out. If that is the case, what is the preferred method for enabling and disabling global interrupts in MKL15 family?

Re: for Kinetis why is __enable_irq and __disable_irq commented out when using CMSIS

Hui_Ma — Thu, 02 Mar 2017 04:13:20 GMT

Please check here to download the latest KSDK software package for KL15 product.

There provide CMSIS driver and example demo located at..\SDK_2.1_MKL15Z128xxx4\boards\frdmkl25z\cmsis_driver_examples folder.

The CMSIS example driver calls the void EnableIRQ(IRQn_Type interrupt) function to enable IRQ and call void DisableIRQ(IRQn_Type interrupt) function to disable the IRQ.

The related software function could be found at <fsl_common.h> file.

In fact, both functions are calling below functions at <core_cm0plus.h> file:

/**
\brief Enable External Interrupt
\details Enables a device-specific interrupt in the NVIC interrupt controller.
\param [in] IRQn External interrupt number. Value cannot be negative.
*/
__STATIC_INLINE void NVIC_EnableIRQ(IRQn_Type IRQn)
{
NVIC->ISER[0U] = (uint32_t)(1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL));
}

/**
\brief Disable External Interrupt
\details Disables a device-specific interrupt in the NVIC interrupt controller.
\param [in] IRQn External interrupt number. Value cannot be negative.
*/
__STATIC_INLINE void NVIC_DisableIRQ(IRQn_Type IRQn)
{
NVIC->ICER[0U] = (uint32_t)(1UL << (((uint32_t)(int32_t)IRQn) & 0x1FUL));
}

Wish it helps.

Have a great day,
Ma Hui
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for Kinetis why is __enable_irq and __disable_irq commented out when using CMSIS

Re: for Kinetis why is __enable_irq and __disable_irq commented out when using CMSIS