1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
|
/*
* Copyright (c) 2006-2022, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2022-02-01 Rudy Lo The first version
*/
#include <lvgl.h>
#include <stdbool.h>
#include <rtdevice.h>
#include <drv_gpio.h>
#include "gt9147.h"
#define TOUCH_DEVICE_NAME "gt9147" /* Touch device name */
#define TOUCH_DEVICE_I2C_BUS "i2c0" /* SCL -> PA1(1), SDA -> PA0(0) */
static rt_device_t ts; /* Touch device handle, Touchscreen */
static struct rt_touch_data *read_data;
static rt_int16_t last_x = 0;
static rt_int16_t last_y = 0;
static bool touchpad_is_pressed(void)
{
if (1 == rt_device_read(ts, 0, read_data, 1))
{
if ((read_data->event == RT_TOUCH_EVENT_DOWN) || (read_data->event == RT_TOUCH_EVENT_MOVE)) {
/* restore data */
last_x = read_data->x_coordinate;
last_y = read_data->y_coordinate;
// rt_kprintf("touch: x = %d, y = %d\n", last_x, last_y);
return true;
}
}
return false;
}
static void touchpad_get_xy(rt_int16_t *x, rt_int16_t *y)
{
*x = last_x;
*y = last_y;
}
static void touchpad_read(lv_indev_drv_t *indev, lv_indev_data_t *data)
{
/*`touchpad_is_pressed` and `touchpad_get_xy` needs to be implemented by you*/
if(touchpad_is_pressed()) {
data->state = LV_INDEV_STATE_PRESSED;
touchpad_get_xy(&data->point.x, &data->point.y);
} else {
data->state = LV_INDEV_STATE_RELEASED;
}
}
rt_err_t rt_hw_gt9147_register(void)
{
struct rt_touch_config config;
rt_uint8_t rst;
rst = GT9147_RST_PIN;
config.dev_name = TOUCH_DEVICE_I2C_BUS;
config.irq_pin.pin = GT9147_IRQ_PIN;
config.irq_pin.mode = PIN_MODE_INPUT_PULLDOWN;
config.user_data = &rst;
rt_hw_gt9147_init(TOUCH_DEVICE_NAME, &config);
ts = rt_device_find(TOUCH_DEVICE_NAME);
if (!ts) {
return -RT_ERROR;
}
read_data = (struct rt_touch_data *)rt_calloc(1, sizeof(struct rt_touch_data));
if (!read_data) {
return -RT_ENOMEM;
}
if (!rt_device_open(ts, RT_DEVICE_FLAG_RDONLY)) {
struct rt_touch_info info;
rt_device_control(ts, RT_TOUCH_CTRL_GET_INFO, &info);
rt_kprintf("type :%d\n", info.type);
rt_kprintf("vendor :%s\n", info.vendor);
rt_kprintf("point_num :%d\n", info.point_num);
rt_kprintf("range_x :%d\n", info.range_x);
rt_kprintf("range_y :%d\n", info.range_y);
return RT_EOK;
} else {
rt_kprintf("open touch device failed.\n");
return -RT_ERROR;
}
}
lv_indev_t * touch_indev;
void lv_port_indev_init(void)
{
static lv_indev_drv_t indev_drv; /* Descriptor of a input device driver */
lv_indev_drv_init(&indev_drv); /* Basic initialization */
indev_drv.type = LV_INDEV_TYPE_POINTER; /* Touch pad is a pointer-like device */
indev_drv.read_cb = touchpad_read; /* Set your driver function */
/* Register the driver in LVGL and save the created input device object */
touch_indev = lv_indev_drv_register(&indev_drv);
/* Register touch device */
rt_hw_gt9147_register();
}
|
