/*----------------------------------------------------------------------------*/
static void commonPinInit(struct Pin pin)
{
pinSetFunction(pin, PIN_DEFAULT);
pinSetPull(pin, PIN_NOPULL);
pinSetSlewRate(pin, PIN_SLEW_NORMAL);
pinSetType(pin, PIN_PUSHPULL);
}
/*----------------------------------------------------------------------------*/
static enum Result pinInterruptInit(void *object, const void *configBase)
{
const struct PinInterruptConfig * const config = configBase;
assert(config);
const struct Pin input = pinInit(config->pin);
assert(pinValid(input));
/* Try to allocate a new channel */
struct PinInterrupt * const interrupt = object;
const int channel = setInstance(interrupt);
if (channel == -1)
return E_BUSY;
/* Configure the pin */
pinInput(input);
pinSetPull(input, config->pull);
interrupt->callback = 0;
interrupt->channel = channel;
interrupt->enabled = false;
interrupt->event = config->event;
interrupt->pin = input.data;
const uint8_t index = interrupt->channel >> 2;
const uint32_t mask = 1UL << interrupt->channel;
/* Enable peripheral */
if (!sysClockStatus(CLK_PINT))
sysClockEnable(CLK_PINT);
/* Select pin and port */
LPC_SYSCON->PINTSEL[index] =
(LPC_SYSCON->PINTSEL[index] & ~PINTSEL_CHANNEL_MASK(channel))
| PINTSEL_CHANNEL(channel, input.data.port, input.data.offset);
/* Configure interrupt as edge sensitive */
LPC_GPIO_INT->ISEL &= ~mask;
/* Configure edge sensitivity options */
if (config->event == PIN_RISING || config->event == PIN_TOGGLE)
LPC_GPIO_INT->SIENR = mask;
if (config->event == PIN_FALLING || config->event == PIN_TOGGLE)
LPC_GPIO_INT->SIENF = mask;
#ifdef CONFIG_PM
/* Interrupt will wake the controller from low-power modes */
LPC_SYSCON->STARTERP0 |= STARTERP0_PINT(interrupt->channel);
#endif
/* Configure interrupt priority, interrupt is disabled by default */
irqSetPriority(calcVector(interrupt->channel), config->priority);
return E_OK;
}
