static xcpt_t up_irqbuttonx(int irq, xcpt_t irqhandler, xcpt_t *store)
{
xcpt_t oldhandler;
irqstate_t flags;
/* Disable interrupts until we are done. This guarantees that the following
* operations are atomic.
*/
flags = irqsave();
/* Get the old button interrupt handler and save the new one */
oldhandler = *store;
*store = irqhandler;
/* Configure the interrupt */
sam3u_gpioirq(irq);
(void)irq_attach(irq, irqhandler);
sam3u_gpioirqenable(irq);
irqrestore(flags);
/* Return the old button handler (so that it can be restored) */
return oldhandler;
}
int arch_tcinitialize(int minor)
{
FAR struct spi_dev_s *dev;
int ret;
idbg("minor %d\n", minor);
DEBUGASSERT(minor == 0);
/* Configure and enable the ADS7843E interrupt pin as an input */
(void)sam3u_configgpio(GPIO_TCS_BUSY);
(void)sam3u_configgpio(GPIO_TCS_IRQ);
/* Configure the PIO interrupt */
sam3u_gpioirq(GPIO_TCS_IRQ);
/* Get an instance of the SPI interface */
dev = up_spiinitialize(CONFIG_ADS7843E_SPIDEV);
if (!dev)
{
idbg("Failed to initialize SPI bus %d\n", CONFIG_ADS7843E_SPIDEV);
return -ENODEV;
}
/* Initialize and register the SPI touschscreen device */
ret = ads7843e_register(dev, &g_tscinfo, CONFIG_ADS7843E_DEVMINOR);
if (ret < 0)
{
idbg("Failed to initialize SPI bus %d\n", CONFIG_ADS7843E_SPIDEV);
/* up_spiuninitialize(dev); */
return -ENODEV;
}
return OK;
}
