1 /* 2 * Copyright (c) 2016-2018 Nordic Semiconductor ASA 3 * Copyright (c) 2016 Vinayak Kariappa Chettimada 4 * 5 * SPDX-License-Identifier: Apache-2.0 6 */ 7 8 #define HAL_TICKER_CNTR_CLK_UNIT_FSEC 30517578125UL 9 #define HAL_TICKER_FSEC_PER_USEC 1000000000UL 10 #define HAL_TICKER_PSEC_PER_USEC 1000000UL 11 #define HAL_TICKER_FSEC_PER_PSEC 1000UL 12 13 /* Macro defining the minimum counter compare offset */ 14 #define HAL_TICKER_CNTR_CMP_OFFSET_MIN 2 15 16 /* Macro defining the max. counter update latency in ticks */ 17 #define HAL_TICKER_CNTR_SET_LATENCY 1 18 19 /* Macro defines the h/w supported most significant bit */ 20 #define HAL_TICKER_CNTR_MSBIT 31 21 22 /* Macro defining the HW supported counter bits */ 23 #define HAL_TICKER_CNTR_MASK 0xFFFFFFFF 24 25 /* 26 * When the LPTMR is enabled, the first increment will take an additional 27 * one or two prescaler clock cycles due to synchronization logic. 28 */ 29 30 /* Macro to translate microseconds to tick units. 31 * NOTE: This returns the floor value. 32 */ 33 #define HAL_TICKER_US_TO_TICKS(x) \ 34 ( \ 35 ((uint32_t)(((uint64_t) (x) * HAL_TICKER_FSEC_PER_USEC) / \ 36 HAL_TICKER_CNTR_CLK_UNIT_FSEC)) & \ 37 HAL_TICKER_CNTR_MASK \ 38 ) 39 40 /* Macro to translate microseconds to tick units. 41 * NOTE: This returns the ceil value. 42 */ 43 #define HAL_TICKER_US_TO_TICKS_CEIL(x) \ 44 ( \ 45 DIV_ROUND_UP(((uint64_t) (x) * HAL_TICKER_FSEC_PER_USEC), \ 46 HAL_TICKER_CNTR_CLK_UNIT_FSEC) & \ 47 HAL_TICKER_CNTR_MASK \ 48 ) 49 50 /* Macro to translate tick units to microseconds. */ 51 #define HAL_TICKER_TICKS_TO_US(x) \ 52 ( \ 53 ((uint32_t)(((uint64_t)(x) * HAL_TICKER_CNTR_CLK_UNIT_FSEC) / \ 54 HAL_TICKER_FSEC_PER_USEC)) \ 55 ) 56 57 /* Macro returning remainder in picoseconds (to fit in 32-bits) */ 58 #define HAL_TICKER_REMAINDER(x) \ 59 ( \ 60 ( \ 61 ((uint64_t) (x) * HAL_TICKER_FSEC_PER_USEC) \ 62 - ((uint64_t)HAL_TICKER_US_TO_TICKS(x) * \ 63 HAL_TICKER_CNTR_CLK_UNIT_FSEC) \ 64 ) \ 65 / HAL_TICKER_FSEC_PER_PSEC \ 66 ) 67 68 /* Macro defining the remainder resolution/range 69 * ~ 1000000 * HAL_TICKER_TICKS_TO_US(1) 70 */ 71 #define HAL_TICKER_REMAINDER_RANGE \ 72 HAL_TICKER_TICKS_TO_US(HAL_TICKER_PSEC_PER_USEC) 73 74 /* Macro defining the margin for positioning re-scheduled nodes */ 75 #define HAL_TICKER_RESCHEDULE_MARGIN \ 76 HAL_TICKER_US_TO_TICKS(150) 77
