int board_tsc_setup(int minor)
{
FAR struct spi_dev_s *dev;
static bool initialized = false;
int ret;
idbg("minor %d\n", minor);
DEBUGASSERT(minor == 0);
/* Have we already initialized? Since we never uninitialize we must prevent
* multiple initializations. This is necessary, for example, when the
* touchscreen example is used as a built-in application in NSH and can be
* called numerous time. It will attempt to initialize each time.
*/
if (!initialized)
{
/* Configure and enable the XPT2046 interrupt pin as an input */
(void)sam_configgpio(GPIO_TSC_IRQ);
/* Configure the PIO interrupt */
sam_gpioirq(SAM_TSC_IRQ);
/* Get an instance of the SPI interface for the touchscreen chip select */
dev = sam_tsc_spiinitialize();
if (!dev)
{
idbg("Failed to initialize bit bang SPI\n");
return -ENODEV;
}
/* Initialize and register the SPI touschscreen device */
ret = ads7843e_register(dev, &g_tscinfo, CONFIG_ADS7843E_DEVMINOR);
if (ret < 0)
{
idbg("Failed to register touchscreen device\n");
/* up_spiuninitialize(dev); */
return -ENODEV;
}
/* Now we are initialized */
initialized = true;
}
return OK;
}
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)sam_configgpio(GPIO_TCS_BUSY);
(void)sam_configgpio(GPIO_TCS_IRQ);
/* Configure the PIO interrupt */
sam_gpioirq(GPIO_TCS_IRQ);
/* Get an instance of the SPI interface for the touchscreen chip select */
dev = up_spiinitialize(TSC_CSNUM);
if (!dev)
{
idbg("Failed to initialize SPI chip select %d\n", TSC_CSNUM);
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 chip select %d\n", TSC_CSNUM);
/* up_spiuninitialize(dev); */
return -ENODEV;
}
return OK;
}
