/* Configure GPIO pins to be used as LED and push button */
static void configure_gpios()
{
mdev_t *pinmux_dev, *gpio_dev;
/* Initialize pinmux driver */
pinmux_drv_init();
/* Open pinmux driver */
pinmux_dev = pinmux_drv_open("MDEV_PINMUX");
/* Initialize GPIO driver */
gpio_drv_init();
/* Open GPIO driver */
gpio_dev = gpio_drv_open("MDEV_GPIO");
/* Configure GPIO pin function for GPIO connected to LED */
pinmux_drv_setfunc(pinmux_dev, gpio_led, GPIO_LED_FN);
/* Configure GPIO pin direction as Output */
gpio_drv_setdir(gpio_dev, gpio_led, GPIO_OUTPUT);
/* Keep initial state of LED: ON */
gpio_drv_write(gpio_dev, gpio_led, 0);
/* Close drivers */
pinmux_drv_close(pinmux_dev);
gpio_drv_close(gpio_dev);
}
/* Basic Sensor IO initialization to be done here
This function will be called only once during sensor registration
*/
int ultrasonic_sensor_init(struct sensor_info *curevent)
{
wmprintf("%s\r\n", __FUNCTION__);
mdev_t *pinmux_dev, *gpio_dev;
/* Initialize pinmux driver */
pinmux_drv_init();
/* Open pinmux driver */
pinmux_dev = pinmux_drv_open("MDEV_PINMUX");
/* Initialize GPIO driver */
gpio_drv_init();
/* Open GPIO driver */
gpio_dev = gpio_drv_open("MDEV_GPIO");
/* Configure GPIO pin function for GPIO connected to LED */
pinmux_drv_setfunc(pinmux_dev, ULTRASONIC_SEN_IO, ULTRASONIC_SEN_IO_GPIO);
/* Confiugre GPIO pin direction as Input */
gpio_drv_setdir(gpio_dev, ULTRASONIC_SEN_IO, GPIO_INPUT);
/* Close drivers */
pinmux_drv_close(pinmux_dev);
gpio_drv_close(gpio_dev);
#ifdef ULTRASONIC_SENSOR_TEST
check_ultrasonic_sensor();
#endif /* ULTRASONIC_SENSOR_TEST */
return 0;
}
// configuring gpios
static void configure_gpios()
{
mdev_t *pinmux_dev, *gpio_dev;
/* Initialize pinmux driver */
pinmux_drv_init();
/* Open pinmux driver */
pinmux_dev = pinmux_drv_open("MDEV_PINMUX");
/* Initialize GPIO driver */
gpio_drv_init();
/* Open GPIO driver */
gpio_dev = gpio_drv_open("MDEV_GPIO");
/* Configure GPIO pin function for GPIO connected to LED */
pinmux_drv_setfunc(pinmux_dev, gpio_led, GPIO_LED_FN);
/* Configure GPIO pin direction as Output */
gpio_drv_setdir(gpio_dev, gpio_led, GPIO_OUTPUT);
/* Keep initial state of LED: ON */
gpio_drv_write(gpio_dev, gpio_led, 0);
/* Configure GPIO pin function for GPIO connected to push button */
pinmux_drv_setfunc(pinmux_dev, gpio_pushbutton, GPIO_PUSHBUTTON_FN);
/* Configure GPIO pin direction as input */
gpio_drv_setdir(gpio_dev, gpio_pushbutton, GPIO_INPUT);
/* Register a callback for push button interrupt */
gpio_drv_set_cb(gpio_dev, gpio_pushbutton, GPIO_INT_FALLING_EDGE,
NULL,
pushbutton_press);
/* Close drivers */
pinmux_drv_close(pinmux_dev);
gpio_drv_close(gpio_dev);
}
/* Initialise the LCD configuration */
static void init_lcd(void)
{
uint8_t buf[20];
mdev_t *i2c_dev;
pinmux_dev = pinmux_drv_open("MDEV_PINMUX");
if (pinmux_dev == NULL) {
lcd_d("Pinmux driver init is required before open");
return;
}
gpio_dev = gpio_drv_open("MDEV_GPIO");
if (gpio_dev == NULL) {
lcd_d("GPIO driver init is required before open");
return;
}
board_lcd_reset();
i2c_dev = i2c_drv_open(MDEV_lcd.private_data,
I2C_SLAVEADR(I2C_LCD_ADDR >> 1));
if (i2c_dev == NULL) {
lcd_d("I2C driver init is required before open");
return;
}
/* The LCD Screen operates in one of the two modes, configuration and
* data. In configuration mode various parameters specific to the LCD
* screen are set while in data mode data is written in the RAM of the
* screen which is then displayed. Set the configuration mode first.
* The device stays in this mode until a I2C_STOP is received. */
buf[0] = LCD_CMD_CONFIG_MODE; /* Com send */
/* Internal OSC Frequency
* Bits: 0 0 0 1 BS F2 F1 F0
* BS: 1 -> 1/4 bias, 0 -> 1/5 bias
* F2~0: internal oscillator frequency
*/
buf[1] = 0x14;
/* Function Set
* Bits: 0 0 1 DL N DH 0 IS
* DL: interface data 1 -> 8 bits, 0 -> 4 bits
* N: number of lines 1 -> 2 lines, 0 -> 1 line
* DH: enable double height font
* IS: Instruction set select 0/1
*/
buf[2] = 0x39;
/* Contrast Set
* Bits: 0 1 1 1 C3 C2 C1 C0
* C3~0: Last 4 bits of the contrast value
*/
buf[3] = 0x78;
/* Contrast Set
* Bits: 0 1 0 1 I B C5 C4
* I: ICON display on/off
* B: booster circuit on/off
* C5~4: Higher order 2 bits of the contrast value
*/
buf[4] = 0x55;
/* Follower Control
* Bits: 0 1 1 0 F RAB2 RAB1 RAB0
* F : Follower Ckt on/off
* RAB2~0: follower amplifier ratio
*/
buf[5] = 0x6d;
/* Display on/off
* Bits: 0 0 0 0 1 D C B
* D: display on/off
* C: cursor on/off
* B: cursor position on/off
*/
buf[6] = 0x0c;
/* Clear Display
* Bits: 0 0 0 0 0 0 0 1
* Set DDRAM address to 00H, and clear display
*/
buf[7] = 0x01;
/* Entry mode
* Bits: 0 0 0 0 0 1 I/D S
* I/D: Cursor move direction inc/dec
* S: Display shift on/off
*/
buf[8] = 0x06;
os_thread_sleep(os_msec_to_ticks(35));
i2c_drv_write(i2c_dev, buf, 9);
i2c_drv_close(i2c_dev);
}
