bool Skitt::initalize()
{
/* Check the settings the gave us. */
/* Configure GPIO pins. */
if (!is_pin_exported(good_led_pin)) {
set_mux("gpmc_ad4", "7");
set_mux("gpmc_ad0", "7");
set_mux("lcd_vsync", "7");
set_mux("lcd_hsync", "7");
set_mux("lcd_data6", "7");
set_mux("lcd_data4", "7");
set_mux("gpmc_ad15", "7");
set_mux("gpmc_ad11", "7");
set_mux("gpmc_ad13", "7");
export_pin(mux_pins[0][0]);
export_pin(mux_pins[0][1]);
export_pin(mux_pins[0][2]);
export_pin(mux_pins[1][0]);
export_pin(mux_pins[1][1]);
export_pin(mux_pins[1][2]);
export_pin(good_led_pin);
export_pin(error_led_pin);
export_pin(streaming_led_pin);
set_pin_direction(mux_pins[0][0], OUT);
set_pin_direction(mux_pins[0][1], OUT);
set_pin_direction(mux_pins[0][2], OUT);
set_pin_direction(mux_pins[1][0], OUT);
set_pin_direction(mux_pins[1][1], OUT);
set_pin_direction(mux_pins[1][2], OUT);
set_pin_direction(good_led_pin, OUT);
set_pin_direction(error_led_pin, OUT);
set_pin_direction(streaming_led_pin, OUT);
}
/* Configure SPI connection. */
if (!connect_to_spi("/dev/spidev2.0")) {
return false;
}
return true;
}
static int export_dio_pins(int io_points)
{
int i, msg, retval=0;
/* This function exports a lot of stuff, which results in a lot of
logging if msg_level is at INFO or ALL. So we save the current value
of msg_level and restore it later. If you actually need to log this
function's actions, change the second line below */
if (io_points == 0) return 0;
msg = rtapi_get_msg_level();
rtapi_set_msg_level(RTAPI_MSG_WARN);
for (i = 0; i < io_points; i++) {
/* point, direction, driver */
retval |= export_pin(i, vti_driver->dir_bits[i / 4], vti_driver);
}
/* restore saved message level */ rtapi_set_msg_level(msg);
return retval;
}
int gpio_init(uint8_t gpio_pin)
{
if (!check_pin(gpio_pin))
return -1;
/* Ensure that PWM GPIO's are not used as PWM output at the same time */
switch (gpio_pin) {
case MIKROBUS_1_PWM:
pwm_release(MIKROBUS_1);
break;
case MIKROBUS_2_PWM:
pwm_release(MIKROBUS_2);
break;
}
/* Export a GPIO by writing its index to file /sys/class/gpio/export. */
if (!is_gpio_exported(gpio_pin)) {
if (export_pin(GPIO_DIR_BASE_PATH, gpio_pin) < 0)
return -1;
}
return gpio_set_direction(gpio_pin, GPIO_INPUT);
}
