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switches.cc
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// Copyright 2017 Emilie Gillet.
//
// Author: Emilie Gillet ([email protected])
//
// 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.
//
// See http://creativecommons.org/licenses/MIT/ for more information.
//
// -----------------------------------------------------------------------------
//
// Driver for the 6 front panel switches.
#include "stages/drivers/switches.h"
#include <algorithm>
namespace stages {
using namespace std;
struct SwitchDefinition {
GPIO_TypeDef* gpio;
uint16_t pin;
};
const SwitchDefinition switch_definitions[] = {
{ GPIOC, GPIO_Pin_0 },
{ GPIOC, GPIO_Pin_1 },
{ GPIOC, GPIO_Pin_2 },
{ GPIOC, GPIO_Pin_3 },
{ GPIOA, GPIO_Pin_0 },
{ GPIOA, GPIO_Pin_1 }
};
void Switches::Init() {
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOA, ENABLE);
RCC_AHBPeriphClockCmd(RCC_AHBPeriph_GPIOC, ENABLE);
GPIO_InitTypeDef gpio_init;
gpio_init.GPIO_Mode = GPIO_Mode_IN;
gpio_init.GPIO_OType = GPIO_OType_PP;
gpio_init.GPIO_Speed = GPIO_Speed_2MHz;
gpio_init.GPIO_PuPd = GPIO_PuPd_UP;
for (int i = 0; i < kNumSwitches; ++i) {
const SwitchDefinition& definition = switch_definitions[i];
gpio_init.GPIO_Pin = definition.pin;
GPIO_Init(definition.gpio, &gpio_init);
}
fill(&switch_state_[0], &switch_state_[kNumSwitches], 0xff);
}
void Switches::Debounce() {
for (int i = 0; i < kNumSwitches; ++i) {
const SwitchDefinition& definition = switch_definitions[i];
switch_state_[i] = (switch_state_[i] << 1) | \
GPIO_ReadInputDataBit(definition.gpio, definition.pin);
}
}
} // namespace stages