root / proj / libs / utils / include / utils.h @ 352
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| 1 | 144 | up20180655 | #ifndef UTILS_H_INCLUDED
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| 2 | #define UTILS_H_INCLUDED
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| 3 | |||
| 4 | 334 | up20180642 | /**
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| 5 | * @defgroup utils utils
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| 6 | 351 | up20180642 | * @ingroup libs
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| 7 | 334 | up20180642 | * @brief Utilities module.
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| 8 | *
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| 9 | * @{
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| 10 | */
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| 11 | 234 | up20180655 | |
| 12 | 334 | up20180642 | /** @brief Get first digit (leftmost digit) of 8-bit BCD */
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| 13 | #define BCD_FIRST(n) (n >> 4) |
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| 14 | /** @brief Get second digit (rightmost digit) of 8-bit BCD */
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| 15 | #define BCD_SECOND(n) (n & 0x0F) |
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| 16 | |||
| 17 | 144 | up20180655 | /**
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| 18 | * @brief Gets the least significant byte of a 16-bit variable
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| 19 | * @param val 16-bit variable
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| 20 | * @param lsb Pointer to a 8-bit variable to store the value of the LSB
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| 21 | * @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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| 22 | */
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| 23 | int(util_get_LSB)(uint16_t val, uint8_t *lsb);
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| 24 | |||
| 25 | /**
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| 26 | * @brief Gets the most significant byte of a 16-bit variable
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| 27 | * @param val 16-bit variable
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| 28 | 323 | up20180642 | * @param msb Pointer to a 8-bit variable to store the value of the MSB
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| 29 | 144 | up20180655 | * @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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| 30 | */
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| 31 | int(util_get_MSB)(uint16_t val, uint8_t *msb);
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| 32 | |||
| 33 | /**
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| 34 | * @brief sys_inb wrapper
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| 35 | * @param port Port to read from
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| 36 | * @param value Pointer to byte to store value read
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| 37 | * @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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| 38 | */
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| 39 | int (util_sys_inb)(int port, uint8_t *value); |
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| 40 | |||
| 41 | /**
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| 42 | 145 | up20180655 | * @brief Unsubcribes Interrupts
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| 43 | * @param interrupt_id Interrupt ID, value via arguments on subscription of the interrupt_id
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| 44 | * @see subscribe_kbc_interrupt, subscribe_timer_interrupt
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| 45 | * @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
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| 46 | */
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| 47 | int (unsubscribe_interrupt)(int *interrupt_id); |
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| 48 | |||
| 49 | /**
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| 50 | 144 | up20180655 | * @brief Gets the minimum value out of two values.
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| 51 | * @param a First value
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| 52 | * @param b Second value
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| 53 | * @return The minimum of the two values
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| 54 | */
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| 55 | 335 | up20180642 | int16_t min_16(int16_t a, int16_t b); |
| 56 | /// @overload
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| 57 | uint16_t min_u16(uint16_t a, uint16_t b); |
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| 58 | /// @overload
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| 59 | int32_t min_32(int32_t a, int32_t b); |
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| 60 | /// @overload
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| 61 | double min_d(double a, double b); |
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| 62 | 144 | up20180655 | |
| 63 | /**
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| 64 | * @brief Gets the maximum value out of two values.
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| 65 | * @param a First value
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| 66 | * @param b Second value
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| 67 | * @return The maximum of the two values
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| 68 | */
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| 69 | 335 | up20180642 | int16_t max_16(int16_t a, int16_t b); |
| 70 | /// @overload
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| 71 | uint16_t max_u16(uint16_t a, uint16_t b); |
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| 72 | /// @overload
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| 73 | int32_t max_32(int32_t a, int32_t b); |
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| 74 | /// @overload
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| 75 | double max_d(double a, double b); |
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| 76 | 144 | up20180655 | |
| 77 | 334 | up20180642 | /**
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| 78 | * @brief Get the absolute value of a double.
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| 79 | * @param a Argument
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| 80 | * @return Absolute value of a
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| 81 | */
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| 82 | 335 | up20180642 | double abs_d(double a); |
| 83 | 144 | up20180655 | |
| 84 | 334 | up20180642 | /**
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| 85 | * @brief Compare if two doubles are approximately equal (within 1e-10).
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| 86 | * @param a First value
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| 87 | * @param b Second value
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| 88 | * @return true if the two numbers are approximately equal, false otherwise
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| 89 | */
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| 90 | 335 | up20180642 | int eq_d(double a, double b); |
| 91 | 200 | up20180655 | |
| 92 | 334 | up20180642 | /**
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| 93 | * @}
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| 94 | */
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| 95 | |||
| 96 | 144 | up20180655 | #endif //UTILS_H_INCLUDED |