static inline int lpc17_configinput(lpc17_pinset_t cfgset, unsigned int port, unsigned int pin)
{
uint32_t regval;
uint32_t fiobase;
uint32_t intbase;
uint32_t pinmask = (1 << pin);
/* Set up FIO registers */
fiobase = g_fiobase[port];
/* Set as input */
regval = getreg32(fiobase + LPC17_FIO_DIR_OFFSET);
regval &= ~pinmask;
putreg32(regval, fiobase + LPC17_FIO_DIR_OFFSET);
/* Set up interrupt registers */
intbase = g_intbase[port];
if (intbase != 0)
{
/* Disable any rising edge interrupts */
regval = getreg32(intbase + LPC17_GPIOINT_INTENR_OFFSET);
regval &= ~pinmask;
putreg32(regval, intbase + LPC17_GPIOINT_INTENR_OFFSET);
/* Disable any falling edge interrupts */
regval = getreg32(intbase + LPC17_GPIOINT_INTENF_OFFSET);
regval &= ~pinmask;
putreg32(regval, intbase + LPC17_GPIOINT_INTENF_OFFSET);
/* Forget about any falling/rising edge interrupt enabled */
#ifdef CONFIG_GPIO_IRQ
lpc17_setintedge(port, pin, 0);
#endif
}
/* Set up PINSEL registers */
/* Configure as GPIO */
lpc17_pinsel(port, pin, PINCONN_PINSEL_GPIO);
/* Set pull-up mode */
lpc17_pullup(cfgset, port, pin);
/* Open drain only applies to outputs */
lpc17_clropendrain(port, pin);
return OK;
}
void lpc17_gpioirqdisable(int irq)
{
/* Map the IRQ number to a port number */
int port = lpc17_irq2port(irq);
if (port >= 0)
{
/* The IRQ number does correspond to an interrupt port. Now get the base
* address of the GPIOINT registers for the port.
*/
uint32_t intbase = g_intbase[port];
if (intbase != 0)
{
/* And get the pin number associated with the port */
unsigned int pin = lpc17_irq2pin(irq);
lpc17_setintedge(intbase, pin, 0);
}
}
}
