| /* |
| * Copyright (c) 2018-2019 Nordic Semiconductor ASA |
| * |
| * SPDX-License-Identifier: Apache-2.0 |
| */ |
| |
| #define EVENT_OVERHEAD_XTAL_US 1500 |
| #define EVENT_OVERHEAD_PREEMPT_US 0 /* if <= min, then dynamic preempt */ |
| #define EVENT_OVERHEAD_PREEMPT_MIN_US 0 |
| #define EVENT_OVERHEAD_PREEMPT_MAX_US EVENT_OVERHEAD_XTAL_US |
| #define EVENT_OVERHEAD_START_US 300 |
| /* Worst-case time margin needed after event end-time in the air |
| * (done/preempt race margin + power-down/chain delay) |
| */ |
| #define EVENT_OVERHEAD_END_US 100 |
| #define EVENT_JITTER_US 16 |
| /* Inter-Event Space (IES) */ |
| #define EVENT_TIES_US 625 |
| /* Ticker resolution margin |
| * Needed due to the lack of fine timing resolution in ticker_start |
| * and ticker_update. Set to 32 us, which is ~1 tick with 32768 Hz |
| * clock. |
| */ |
| #define EVENT_TICKER_RES_MARGIN_US 32 |
| |
| #define EVENT_RX_JITTER_US(phy) 16 /* Radio Rx timing uncertainty */ |
| #define EVENT_RX_TO_US(phy) ((((((phy)&0x03) + 4)<<3)/BIT((((phy)&0x3)>>1))) + \ |
| EVENT_RX_JITTER_US(phy)) |
| |
| /* Turnaround time between RX and TX is based on CPU execution speed. It also |
| * includes radio ramp up time. The value must meet hard deadline of `150 us` |
| * imposed by BT Core spec for inter frame spacing (IFS). To include CPUs with |
| * slow clock, the conservative approach was taken to use IFS value for all |
| * cases. |
| */ |
| #define EVENT_RX_TX_TURNAROUND(phy) 150 |
