/* 3b2_rev2_stddev.h: 82C54 Interval Timer. Copyright (c) 2021, Seth J. Morabito Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. Except as contained in this notice, the name of the author shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from the author. */ #ifndef _3B2_REV3_TIMER_H_ #define _3B2_REV3_TIMER_H_ #include "3b2_defs.h" /* Timer definitions */ #define TIMER_STP_US 1 #define tmrnum u3 #define tmr up7 #define TIMER_REG_DIVA 0x03 #define TIMER_REG_DIVB 0x07 #define TIMER_REG_DIVC 0x0b #define TIMER_REG_CTRL 0x0f #define TIMER_CLR_LATCH 0x13 #define TIMER_MODE(ctr) (((ctr->ctrl) >> 1) & 7) #define TIMER_RW(ctr) (((ctr->ctrl) >> 4) & 3) #define CLK_LATCH 0 #define CLK_LSB 1 #define CLK_MSB 2 #define CLK_LMB 3 struct timer_ctr { uint16 divider; uint16 val; uint8 ctrl_latch; uint16 cnt_latch; uint8 ctrl; t_bool r_lmb; t_bool w_lmb; t_bool enabled; t_bool r_ctrl_latch; t_bool r_cnt_latch; }; /* 82C54 Timer */ t_stat timer_reset(DEVICE *dptr); uint32 timer_read(uint32 pa, size_t size); void timer_write(uint32 pa, uint32 val, size_t size); t_stat timer0_svc(UNIT *uptr); t_stat timer1_svc(UNIT *uptr); t_stat timer2_svc(UNIT *uptr); /* void timer_tick(uint8 ctrnum); */ void timer_disable(uint8 ctrnum); void timer_enable(uint8 ctrnum); #endif /* _3B2_REV3_TIMER_H_ */