projects / sigrok-firmware-fx2lafw.git / blame
| Commit | Line | Data |
|---|---|---|
| 3608c106 UH |
1 | // Copyright (C) 2009 Ubixum, Inc. |
| 2 | // | |
| 3 | // This library is free software; you can redistribute it and/or | |
| 4 | // modify it under the terms of the GNU Lesser General Public | |
| 5 | // License as published by the Free Software Foundation; either | |
| 6 | // version 2.1 of the License, or (at your option) any later version. | |
| 7 | // | |
| 8 | // This library is distributed in the hope that it will be useful, | |
| 9 | // but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 10 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 11 | // Lesser General Public License for more details. | |
| 12 | // | |
| 13 | // You should have received a copy of the GNU Lesser General Public | |
| 040a6eae | 14 | // License along with this library; if not, see <http://www.gnu.org/licenses/>. |
| 3608c106 UH |
15 | |
| 16 | /*! \file | |
| 17 | * Functions for causing delays. | |
| 18 | * */ | |
| 19 | ||
| 20 | ||
| 21 | #ifndef DELAY_H | |
| 22 | #define DELAY_H | |
| 23 | ||
| 24 | #include "fx2types.h" | |
| 25 | ||
| 26 | /** | |
| 27 | * 0-65536 millis | |
| 28 | **/ | |
| 29 | void delay(WORD millis); | |
| 30 | ||
| 31 | /** | |
| 32 | * See TRM 15-14,15-15 | |
| 33 | * some registers (r/w) require syncdelay after | |
| 34 | * | |
| 35 | * up to the programmer to determine which sync is needed. | |
| 36 | * for standard 48mhz clock w/ 48mhz IFCONFIG 3 nops is sufficient. | |
| 37 | * | |
| 38 | * slower clock and faster ifclock require more delay | |
| 39 | * | |
| 40 | * min delay = roof ( 1.5 x (ifclock/clkout + 1) ) | |
| 41 | * | |
| 42 | * Minimum IFCLOCK is 5mhz but you have to use an | |
| 43 | * external clock source to go below 30mhz | |
| 44 | * | |
| 45 | * IFCLKSRC 1 = internal, 0=external | |
| 46 | * 3048mhz 0 = 30mhz, 1 = 48mzh | |
| 47 | * | |
| 48 | * Figure your own sync delay out if IFCLKSRC=0. | |
| 49 | **/ | |
| 50 | ||
| 51 | #define NOP __asm nop __endasm | |
| 52 | ||
| 53 | /** | |
| 54 | * SYNCDELAY2 can work for the following clock speeds | |
| 55 | * | |
| 56 | * ifclk/clk | |
| 57 | * \li 48/12 | |
| 58 | * | |
| 59 | * ceil(1.5 * (20.8 / 83.3 + 1)) = 2 | |
| 60 | * | |
| 61 | * \see NOP | |
| 62 | * | |
| 63 | **/ | |
| 64 | #define SYNCDELAY2 NOP; NOP | |
| 65 | ||
| 66 | /** | |
| 67 | * SYNCDELAY3 can work for the following clock speeds | |
| 68 | * | |
| 69 | * ifcfg/clk | |
| 70 | * \li 48/24 | |
| 71 | * \li 48/48 | |
| 72 | * \li 30/12 | |
| 73 | * \li 30/24 | |
| 74 | * | |
| 75 | * \see NOP | |
| 76 | **/ | |
| 77 | #define SYNCDELAY3 NOP; NOP; NOP | |
| 78 | ||
| 79 | /** | |
| 80 | * SYNCDELAY4 should be used for the following speeds | |
| 81 | * | |
| 82 | * ifcfg/clk | |
| 83 | * \li 30/48 | |
| 84 | * | |
| 85 | * \see NOP | |
| 86 | **/ | |
| 87 | #define SYNCDELAY4 NOP; NOP; NOP; NOP | |
| 88 | ||
| 89 | #endif | |
| 90 |