void PMDialPad::adcDone() {
if (status == CONVERT) {
uint16_t res = anaIn.read_result_u16();
keys[keymap(res)]++;
// do SIMPLEKEYBOARD_NB_CONVERT_RUN runs, than lower the sampling freq
if (convert_run++ >= SIMPLEKEYBOARD_NB_CONVERT_RUN) {
convert_run = 0;
uint8_t maxVal = 0;
enum Key maxIdx = KEY_NONE;
for (int i = 0; i < KEY_LIST_LEN; ++i) {
if (keys[i] > maxVal) {
maxVal = keys[i]; maxIdx = static_cast<enum Key>(i); keys[i] = 0;
}
}
// call appropriate callbacks if there was a change
if (button != maxIdx) {
if (released_cb && button < KEY_INVALID) {
released_cb.call(button);
}
button = maxIdx;
if (button != KEY_NONE) {
if (pressed_cb) {
pressed_cb.call(button);
}
// if hold_cb is set, start a timer
if (hold_cb) {
cancelCallbackSave(holdtime_evt_handle);
holdtime_evt_handle = minar::Scheduler::postCallback(holdtime_evt).delay(minar::milliseconds(holdTime)).getHandle();
}
} else {
// no button pressed, cancle callback if scheduled
cancelCallbackSave(holdtime_evt_handle);
}
}
// decide what to do next
if (button == KEY_NONE) {
interruptMode();
status = IDLE;
} else {
status = MEASUREMENT;
minar::Scheduler::postCallback(timeout_evt).tolerance(minar::milliseconds(CB_TOLERANCE_MS)).delay(minar::milliseconds(RECHECK_TIME_MS));
}
} else {
status = MEASUREMENT;
minar::Scheduler::postCallback(timeout_evt).tolerance(minar::milliseconds(CB_TOLERANCE_MS)).delay(minar::milliseconds(DEBOUNCE_TIME_MS));
}
}
}
PMDialPad::PMDialPad(PinName button, PinName scale) :
button(KEY_NONE),
holdTime(BUTTON_HOLD_TIME_MS),
anaIn(button),
intIn(button),
scaleOut(scale),
status(IDLE),
convert_run(0),
timeout_evt(mbed::util::FunctionPointer0<void>(this, &PMDialPad::timeout).bind()),
adc_evt(mbed::util::FunctionPointer0<void>(this, &PMDialPad::adcDone).bind()),
holdtime_evt(mbed::util::FunctionPointer0<void>(this, &PMDialPad::holdTimeout).bind()),
holdtime_evt_handle(0),
pressed_cb(0),
released_cb(0),
hold_cb(0)
{
anaIn.config(ADC_CONFIG_RES_10bit, ADC_CONFIG_INPSEL_AnalogInputTwoThirdsPrescaling,
ADC_CONFIG_REFSEL_SupplyOneHalfPrescaling, ADC_CONFIG_EXTREFSEL_None);
anaIn.interrupt(this, &PMDialPad::adcInterrupt);
anaIn.disable();
intIn.input();
intIn.fall(this, &PMDialPad::buttonPress);
interruptMode();
}
void interruptMode(uint8_t pin, uint8_t mode)
{
GPIO_INT_TYPE type = ConvertArduinoInterruptMode(mode);
interruptMode(pin, type);
}
