int sam_ajoy_initialization(void)
{
int ret;
int fd;
int i;
/* NOTE: The ADC driver was initialized earlier in the bring-up sequence. */
/* Open the ADC driver for reading. */
fd = open("/dev/adc0", O_RDONLY);
if (fd < 0)
{
int errcode = get_errno();
ierr("ERROR: Failed to open /dev/adc0: %d\n", errcode);
return -errcode;
}
/* Detach the file structure from the file descriptor so that it can be
* used on any thread.
*/
ret = file_detach(fd, &g_adcfile);
if (ret < 0)
{
ierr("ERROR: Failed to detach from file descriptor: %d\n", ret);
(void)close(fd);
return ret;
}
/* Configure the GPIO pins as interrupting inputs. */
for (i = 0; i < AJOY_NGPIOS; i++)
{
/* Configure the PIO as an input */
sam_configpio(g_joypio[i]);
/* Configure PIO interrupts, attach the interrupt handler, but leave
* the interrupt disabled.
*/
sam_pioirq(g_joypio[i]);
(void)irq_attach(g_joyirq[i], ajoy_interrupt);
sam_pioirqdisable(g_joyirq[i]);
}
/* Register the joystick device as /dev/ajoy0 */
ret = ajoy_register("/dev/ajoy0", &g_ajoylower);
if (ret < 0)
{
ierr("ERROR: ajoy_register failed: %d\n", ret);
file_close_detached(&g_adcfile);
}
return ret;
}
int board_ajoy_initialize(void)
{
int ret;
int i;
#ifndef NO_JOYSTICK_ADC
int fd;
iinfo("Initialize ADC driver: /dev/adc0\n");
/* NOTE: The ADC driver was initialized earlier in the bring-up sequence. */
/* Open the ADC driver for reading. */
fd = open("/dev/adc0", O_RDONLY);
if (fd < 0)
{
int errcode = get_errno();
ierr("ERROR: Failed to open /dev/adc0: %d\n", errcode);
return -errcode;
}
/* Detach the file structure from the file descriptor so that it can be
* used on any thread.
*/
ret = file_detach(fd, &g_adcfile);
if (ret < 0)
{
ierr("ERROR: Failed to detach from file descriptor: %d\n", ret);
(void)close(fd);
return ret;
}
#endif
/* Configure the GPIO pins as interrupting inputs. NOTE: This is
* unnecessary for interrupting pins since it will also be done by
* stm32_gpiosetevent().
*/
for (i = 0; i < AJOY_NGPIOS; i++)
{
/* Configure the PIO as an input */
stm32_configgpio(g_joygpio[i]);
}
/* Register the joystick device as /dev/ajoy0 */
iinfo("Initialize joystick driver: /dev/ajoy0\n");
ret = ajoy_register("/dev/ajoy0", &g_ajoylower);
if (ret < 0)
{
ierr("ERROR: ajoy_register failed: %d\n", ret);
#ifndef NO_JOYSTICK_ADC
file_close_detached(&g_adcfile);
#endif
}
return ret;
}
