static int nsh_sdinitialize(void)
{
int ret;
#ifdef NSH_HAVE_MMCSD_CD
/* Configure the SD card detect GPIO */
lpc17_configgpio(GPIO_SD_CD);
/* Attach an interrupt handler to get notifications when a card is
* inserted or deleted.
*/
#if NSH_HAVE_MMCSD_CDINT
(void)irq_attach(LPC17_IRQ_P0p13, nsh_cdinterrupt);
up_enable_irq(LPC17_IRQ_P0p13);
#endif
#endif
/* First, get an instance of the SDIO interface */
g_sdiodev = sdio_initialize(CONFIG_NSH_MMCSDSLOTNO);
if (!g_sdiodev)
{
message("nsh_archinitialize: Failed to initialize SDIO slot %d\n",
CONFIG_NSH_MMCSDSLOTNO);
return -ENODEV;
}
/* Now bind the SDIO interface to the MMC/SD driver */
ret = mmcsd_slotinitialize(CONFIG_NSH_MMCSDMINOR, g_sdiodev);
if (ret != OK)
{
message("nsh_archinitialize: "
"Failed to bind SDIO to the MMC/SD driver: %d\n",
ret);
return ret;
}
/* Check if there is a card in the slot and inform the SDCARD driver. If
* we do not support the card detect, then let's assume that there is
* one.
*/
#ifdef NSH_HAVE_MMCSD_CD
sdio_mediachange(g_sdiodev, !lpc17_gpioread(GPIO_SD_CD));
#else
sdio_mediachange(g_sdiodev, true);
#endif
return OK;
}
static int nsh_cdinterrupt(int irq, FAR void *context)
{
static bool inserted = 0xff; /* Impossible value */
bool present;
present = !lpc17_gpioread(GPIO_SD_CD);
if (present != inserted)
{
sdio_mediachange(g_sdiodev, present);
inserted = present;
}
return OK;
}
uint8_t lpc17_spistatus(FAR struct spi_dev_s *dev, enum spi_dev_e devid)
{
if (devid == SPIDEV_MMCSD)
{
/* Read the state of the card-detect bit */
if (lpc17_gpioread(ZKITARM_SD_CD) == 0)
{
spiinfo("Returning SPI_STATUS_PRESENT\n");
return SPI_STATUS_PRESENT;
}
}
spiinfo("Returning zero\n");
return 0;
}
uint8_t board_buttons(void)
{
uint8_t ret = 0;
bool released;
int i;
/* Check that state of each key */
for (i = 0; i < BOARD_NUM_BUTTONS; i++)
{
released = lpc17_gpioread(g_buttons[i]);
/* Accumulate set of depressed keys */
if (!released)
{
ret |= (1 << i);
}
}
return ret;
}
uint8_t up_buttons(void)
{
uint8_t ret = 0;
int i;
/* Check that state of each key */
for (i = 0; i < BOARD_NUM_BUTTONS; i++)
{
/* A LOW value means that the key is pressed. */
bool released = lpc17_gpioread(g_buttoncfg[i]);
/* Accumulate the set of depressed (not released) keys */
if (!released)
{
ret |= (1 << i);
}
}
return ret;
}