HIFIVE1-VP/platform/incl/sysc/SiFive/pwm.h

80 lines
3.0 KiB
C
Raw Normal View History

2018-11-08 13:31:28 +01:00
/*******************************************************************************
* Copyright (C) 2017,2018 MINRES Technologies GmbH
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
* 1. Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright notice,
* this list of conditions and the following disclaimer in the documentation
* and/or other materials provided with the distribution.
*
* 3. Neither the name of the copyright holder nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*
*******************************************************************************/
#ifndef _PWM_H_
#define _PWM_H_
#include "cci_configuration"
#include "scc/signal_initiator_mixin.h"
#include "scc/signal_target_mixin.h"
#include "scc/tlm_target.h"
#include <tlm/tlm_signal.h>
namespace sysc {
class pwm_regs;
class pwm : public sc_core::sc_module, public scc::tlm_target<> {
public:
SC_HAS_PROCESS(pwm);// NOLINT
sc_core::sc_in<sc_core::sc_time> clk_i;
sc_core::sc_in<bool> rst_i;
sc_core::sc_vector<scc::tlm_signal_bool_opt_out> cmpgpio_o;
sc_core::sc_vector<sc_core::sc_out<bool>> cmpip_o;
pwm(sc_core::sc_module_name nm);
virtual ~pwm() override; // need to keep it in source file because of fwd declaration of gpio_regs
protected:
sc_core::sc_time clk, last_clk;
void clock_cb();
void reset_cb();
inline double get_pulses(sc_core::sc_time d) {
auto t = sc_core::sc_time_stamp() + d;
return last_clk > sc_core::SC_ZERO_TIME ? (t - last_cnt_update) / last_clk : 0.;
}
void update_counter();
void write_cmpgpio(size_t, bool);
std::unique_ptr<pwm_regs> regs;
uint64_t current_cnt;
sc_core::sc_time last_cnt_update;
double clk_remainder = 0.0;
bool last_enable = false, reset_cnt = false;
sc_core::sc_event update_counter_evt;
std::array<bool, 4> pwmcmp_ip;
};
} /* namespace sysc */
#endif /* _GPIO_H_ */