root / proj / libs / utils / include / utils.h @ 335
History | View | Annotate | Download (2.7 KB)
| 1 |
#ifndef UTILS_H_INCLUDED
|
|---|---|
| 2 |
#define UTILS_H_INCLUDED
|
| 3 |
|
| 4 |
/**
|
| 5 |
* @defgroup utils utils
|
| 6 |
* @brief Utilities module.
|
| 7 |
*
|
| 8 |
* @{
|
| 9 |
*/
|
| 10 |
|
| 11 |
/** @brief Get first digit (leftmost digit) of 8-bit BCD */
|
| 12 |
#define BCD_FIRST(n) (n >> 4) |
| 13 |
/** @brief Get second digit (rightmost digit) of 8-bit BCD */
|
| 14 |
#define BCD_SECOND(n) (n & 0x0F) |
| 15 |
|
| 16 |
/**
|
| 17 |
* @brief Gets the least significant byte of a 16-bit variable
|
| 18 |
* @param val 16-bit variable
|
| 19 |
* @param lsb Pointer to a 8-bit variable to store the value of the LSB
|
| 20 |
* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
|
| 21 |
*/
|
| 22 |
int(util_get_LSB)(uint16_t val, uint8_t *lsb);
|
| 23 |
|
| 24 |
/**
|
| 25 |
* @brief Gets the most significant byte of a 16-bit variable
|
| 26 |
* @param val 16-bit variable
|
| 27 |
* @param msb Pointer to a 8-bit variable to store the value of the MSB
|
| 28 |
* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
|
| 29 |
*/
|
| 30 |
int(util_get_MSB)(uint16_t val, uint8_t *msb);
|
| 31 |
|
| 32 |
/**
|
| 33 |
* @brief sys_inb wrapper
|
| 34 |
* @param port Port to read from
|
| 35 |
* @param value Pointer to byte to store value read
|
| 36 |
* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
|
| 37 |
*/
|
| 38 |
int (util_sys_inb)(int port, uint8_t *value); |
| 39 |
|
| 40 |
/**
|
| 41 |
* @brief Unsubcribes Interrupts
|
| 42 |
* @param interrupt_id Interrupt ID, value via arguments on subscription of the interrupt_id
|
| 43 |
* @see subscribe_kbc_interrupt, subscribe_timer_interrupt
|
| 44 |
* @return ERROR_CODE code representing the result of the operation, SUCCESS code is returned if everything is OK
|
| 45 |
*/
|
| 46 |
int (unsubscribe_interrupt)(int *interrupt_id); |
| 47 |
|
| 48 |
/**
|
| 49 |
* @brief Gets the minimum value out of two values.
|
| 50 |
* @param a First value
|
| 51 |
* @param b Second value
|
| 52 |
* @return The minimum of the two values
|
| 53 |
*/
|
| 54 |
int16_t min_16(int16_t a, int16_t b); |
| 55 |
/// @overload
|
| 56 |
uint16_t min_u16(uint16_t a, uint16_t b); |
| 57 |
/// @overload
|
| 58 |
int32_t min_32(int32_t a, int32_t b); |
| 59 |
/// @overload
|
| 60 |
double min_d(double a, double b); |
| 61 |
|
| 62 |
/**
|
| 63 |
* @brief Gets the maximum value out of two values.
|
| 64 |
* @param a First value
|
| 65 |
* @param b Second value
|
| 66 |
* @return The maximum of the two values
|
| 67 |
*/
|
| 68 |
int16_t max_16(int16_t a, int16_t b); |
| 69 |
/// @overload
|
| 70 |
uint16_t max_u16(uint16_t a, uint16_t b); |
| 71 |
/// @overload
|
| 72 |
int32_t max_32(int32_t a, int32_t b); |
| 73 |
/// @overload
|
| 74 |
double max_d(double a, double b); |
| 75 |
|
| 76 |
/**
|
| 77 |
* @brief Get the absolute value of a double.
|
| 78 |
* @param a Argument
|
| 79 |
* @return Absolute value of a
|
| 80 |
*/
|
| 81 |
double abs_d(double a); |
| 82 |
|
| 83 |
/**
|
| 84 |
* @brief Compare if two doubles are approximately equal (within 1e-10).
|
| 85 |
* @param a First value
|
| 86 |
* @param b Second value
|
| 87 |
* @return true if the two numbers are approximately equal, false otherwise
|
| 88 |
*/
|
| 89 |
int eq_d(double a, double b); |
| 90 |
|
| 91 |
/**
|
| 92 |
* @}
|
| 93 |
*/
|
| 94 |
|
| 95 |
#endif //UTILS_H_INCLUDED |