mirror of https://github.com/trudnai/Steve2.git
58 lines
1.7 KiB
C
58 lines
1.7 KiB
C
//
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// paddle.h
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// Steve ][
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//
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// Created by Tamas Rudnai on 5/19/20.
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// Copyright © 2019, 2020 Tamas Rudnai. All rights reserved.
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//
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// This file is part of Steve ][ -- The Apple ][ Emulator.
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//
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// Steve ][ is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Steve ][ is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Steve ][. If not, see <https://www.gnu.org/licenses/>.
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//
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#ifndef paddle_h
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#define paddle_h
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#include "6502.h"
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// TODO: We may need a joystick calibration
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#define PDL_MAX_TIME 3072.0 // 3300.0
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#define PDL_TIME_DECAY ( 255.0 / PDL_MAX_TIME )
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uint64_t pdl_reset_time = 0;
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uint64_t pdl_current_time = 0;
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uint64_t pdl_elapsed_time = 0;
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double pdl_value[4] = { 0.5, 0.5, 0.5, 0.5 };
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double pdl_prev[4] = { 0.5, 0.5, 0.5, 0.5 };
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double pdl_diff[4] = { 0.0, 0.0, 0.0, 0.0 };
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double * pdl_valarr = pdl_value;
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double * pdl_prevarr = pdl_prev;
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double * pdl_diffarr = pdl_diff;
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INLINE uint8_t pdl_reset() {
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pdl_reset_time = m6502.clktime + clkfrm;
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return 0;
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}
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INLINE uint8_t pdl_read( uint8_t pdl ) {
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pdl_current_time = m6502.clktime + clkfrm;
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pdl_elapsed_time = pdl_current_time - pdl_reset_time;
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double normalized_time = pdl_elapsed_time / PDL_MAX_TIME; // 0: started, >= 1 ended
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return normalized_time >= pdl_value[pdl] ? 0 : 1 << 7;
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}
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#endif /* paddle_h */
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