1 // Copyright 2013 Emilie Gillet. 2 // 3 // Author: Emilie Gillet (emilie.o.gillet@gmail.com) 4 // 5 // Permission is hereby granted, free of charge, to any person obtaining a copy 6 // of this software and associated documentation files (the "Software"), to deal 7 // in the Software without restriction, including without limitation the rights 8 // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 9 // copies of the Software, and to permit persons to whom the Software is 10 // furnished to do so, subject to the following conditions: 11 // 12 // The above copyright notice and this permission notice shall be included in 13 // all copies or substantial portions of the Software. 14 // 15 // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 16 // IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 17 // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 18 // AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 19 // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 20 // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 21 // THE SOFTWARE. 22 // 23 // See http://creativecommons.org/licenses/MIT/ for more information. 24 // 25 // ----------------------------------------------------------------------------- 26 // 27 // Driver for the end of cycles output pins. 28 29 #ifndef TIDES_DRIVERS_GATE_INPUT_H_ 30 #define TIDES_DRIVERS_GATE_INPUT_H_ 31 32 #include "stmlib/stmlib.h" 33 34 #include <stm32f10x_conf.h> 35 36 #include "tides/generator.h" 37 38 namespace tides { 39 40 class GateInput { 41 public: GateInput()42 GateInput() { } ~GateInput()43 ~GateInput() { } 44 45 void Init(); 46 Read()47 inline uint8_t Read() { 48 uint16_t value = GPIOB->IDR; 49 50 uint8_t state = 0; 51 if (!(value & GPIO_Pin_1)) { 52 state |= CONTROL_FREEZE; 53 } 54 if (!(value & GPIO_Pin_11)) { 55 state |= CONTROL_GATE; 56 } 57 if (!(value & GPIO_Pin_10)) { 58 state |= CONTROL_CLOCK; 59 } 60 if (!(previous_state_ & CONTROL_CLOCK) && (state & CONTROL_CLOCK)) { 61 state |= CONTROL_CLOCK_RISING; 62 } 63 if (!(previous_state_ & CONTROL_GATE) && (state & CONTROL_GATE)) { 64 state |= CONTROL_GATE_RISING; 65 } 66 if ((previous_state_ & CONTROL_GATE) && !(state & CONTROL_GATE)) { 67 state |= CONTROL_GATE_FALLING; 68 } 69 previous_state_ = state; 70 return state; 71 } 72 73 private: 74 uint8_t previous_state_; 75 76 DISALLOW_COPY_AND_ASSIGN(GateInput); 77 }; 78 79 } // namespace tides 80 81 #endif // TIDES_DRIVERS_GATE_INPUT_H_ 82