root / proj / libs / utils / include / utils.h @ 344
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#ifndef UTILS_H_INCLUDED
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#define UTILS_H_INCLUDED
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/**
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* @defgroup utils utils
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* @brief Utilities module.
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*
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* @{
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*/
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/** @brief Get first digit (leftmost digit) of 8-bit BCD */
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#define BCD_FIRST(n) (n >> 4) |
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/** @brief Get second digit (rightmost digit) of 8-bit BCD */
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#define BCD_SECOND(n) (n & 0x0F) |
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/**
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* @brief Gets the least significant byte of a 16-bit variable
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* @param val 16-bit variable
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* @param lsb Pointer to a 8-bit variable to store the value of the LSB
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* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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*/
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int(util_get_LSB)(uint16_t val, uint8_t *lsb);
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/**
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* @brief Gets the most significant byte of a 16-bit variable
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* @param val 16-bit variable
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* @param msb Pointer to a 8-bit variable to store the value of the MSB
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* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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*/
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int(util_get_MSB)(uint16_t val, uint8_t *msb);
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/**
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* @brief sys_inb wrapper
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* @param port Port to read from
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* @param value Pointer to byte to store value read
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* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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*/
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int (util_sys_inb)(int port, uint8_t *value); |
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/**
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* @brief Unsubcribes Interrupts
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* @param interrupt_id Interrupt ID, value via arguments on subscription of the interrupt_id
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* @see subscribe_kbc_interrupt, subscribe_timer_interrupt
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* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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*/
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int (unsubscribe_interrupt)(int *interrupt_id); |
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/**
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* @brief Gets the minimum value out of two values.
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* @param a First value
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* @param b Second value
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* @return The minimum of the two values
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*/
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int16_t min_16(int16_t a, int16_t b); |
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/// @overload
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uint16_t min_u16(uint16_t a, uint16_t b); |
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/// @overload
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int32_t min_32(int32_t a, int32_t b); |
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/// @overload
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double min_d(double a, double b); |
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/**
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* @brief Gets the maximum value out of two values.
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* @param a First value
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* @param b Second value
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* @return The maximum of the two values
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*/
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int16_t max_16(int16_t a, int16_t b); |
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/// @overload
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uint16_t max_u16(uint16_t a, uint16_t b); |
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/// @overload
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int32_t max_32(int32_t a, int32_t b); |
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/// @overload
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double max_d(double a, double b); |
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/**
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* @brief Get the absolute value of a double.
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* @param a Argument
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* @return Absolute value of a
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*/
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double abs_d(double a); |
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/**
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* @brief Compare if two doubles are approximately equal (within 1e-10).
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* @param a First value
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* @param b Second value
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* @return true if the two numbers are approximately equal, false otherwise
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*/
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int eq_d(double a, double b); |
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/**
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* @}
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*/
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#endif //UTILS_H_INCLUDED |