riot-ci/RIOT
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

sys/bit: add bit_checkXX() functions

Browse Source
This commit is contained in:
Benjamin Valentin 2021-06-02 14:07:17 +02:00
parent e9579cb21f
commit 3dd5f5c789
1 changed files with 66 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

66
sys/include/bit.h
View File

@ -197,6 +197,57 @@ static inline void bit_clear8(volatile uint8_t *ptr, uint8_t bit)
*((volatile uint8_t *)bitband_addr(ptr, bit)) = 0;
}
/**
* @brief Checks if a single bit in the 32 bit word pointed to by @p ptr is set
*
* The effect is the same as for the following snippet:
*
* @code{c}
* *ptr & (1 << bit);
* @endcode
*
* @param[in] ptr pointer to target word
* @param[in] bit bit number within the word
*/
static inline bool bit_check32(volatile uint32_t *ptr, uint8_t bit)
{
return *((volatile uint32_t *)bitband_addr(ptr, bit));
}
/**
* @brief Checks if a single bit in the 16 bit word pointed to by @p ptr is set
*
* The effect is the same as for the following snippet:
*
* @code{c}
* *ptr & (1 << bit);
* @endcode
*
* @param[in] ptr pointer to target word
* @param[in] bit bit number within the word
*/
static inline bool bit_check16(volatile uint16_t *ptr, uint8_t bit)
{
return *((volatile uint16_t *)bitband_addr(ptr, bit));
}
/**
* @brief Checks if a single bit in the 8 bit byte pointed to by @p ptr is set
*
* The effect is the same as for the following snippet:
*
* @code{c}
* *ptr & (1 << bit);
* @endcode
*
* @param[in] ptr pointer to target byte
* @param[in] bit bit number within the byte
*/
static inline bool bit_check8(volatile uint8_t *ptr, uint8_t bit)
{
return *((volatile uint8_t *)bitband_addr(ptr, bit));
}
/** @} */
#else /* CPU_HAS_BITBAND */
@ -231,6 +282,21 @@ static inline void bit_clear8(volatile uint8_t *ptr, uint8_t bit)
*ptr &= ~(1 << (bit));
}
static inline bool bit_check32(volatile uint32_t *ptr, uint8_t bit)
{
return *ptr & (1 << bit);
}
static inline bool bit_check16(volatile uint16_t *ptr, uint8_t bit)
{
return *ptr & (1 << bit);
}
static inline bool bit_check8(volatile uint8_t *ptr, uint8_t bit)
{
return *ptr & (1 << bit);
}
#endif /* CPU_HAS_BITBAND */
#endif /* !BITBAND_FUNCTIONS_PROVIDED */