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rt-thread-official/bsp/nxp/imx/imx6ull-smart/drivers/drv_touch.c

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/*
* Copyright (c) 2006-2018, RT-Thread Development Team
*
* SPDX-License-Identifier: Apache-2.0
*
* Change Logs:
* Date Author Notes
* 2021-01-13 RiceChen the first version
*/
#include <rtthread.h>
#include <rtdevice.h>
#include <string.h>
#include <time.h>
#define DBG_TAG "gt911"
#define DBG_LVL DBG_INFO
#include <rtdbg.h>
#include "drv_touch.h"
#define GET_PIN(PORTx, PIN) (32 * (PORTx - 1) + (PIN & 31))
#define IRQ_PIN GET_PIN(1, 5)
#define RST_PIN GET_PIN(5, 2)
static struct rt_i2c_client gt911_client;
/* hardware section */
static rt_uint8_t GT911_CFG_TBL[] =
{
0x6b, 0x00, 0x04, 0x58, 0x02, 0x05, 0x0d, 0x00, 0x01, 0x0f,
0x28, 0x0f, 0x50, 0x32, 0x03, 0x05, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8a, 0x2a, 0x0c,
0x45, 0x47, 0x0c, 0x08, 0x00, 0x00, 0x00, 0x40, 0x03, 0x2c,
0x00, 0x01, 0x00, 0x00, 0x00, 0x03, 0x64, 0x32, 0x00, 0x00,
0x00, 0x28, 0x64, 0x94, 0xd5, 0x02, 0x07, 0x00, 0x00, 0x04,
0x95, 0x2c, 0x00, 0x8b, 0x34, 0x00, 0x82, 0x3f, 0x00, 0x7d,
0x4c, 0x00, 0x7a, 0x5b, 0x00, 0x7a, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x18, 0x16, 0x14, 0x12, 0x10, 0x0e, 0x0c, 0x0a,
0x08, 0x06, 0x04, 0x02, 0xff, 0xff, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x16, 0x18, 0x1c, 0x1d, 0x1e, 0x1f, 0x20, 0x21,
0x22, 0x24, 0x13, 0x12, 0x10, 0x0f, 0x0a, 0x08, 0x06, 0x04,
0x02, 0x00, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0x00, 0x00, 0x00, 0x00, 0x79, 0x01,
};
static rt_err_t gt911_write_reg(struct rt_i2c_client *dev, rt_uint8_t *data, rt_uint8_t len)
{
struct rt_i2c_msg msgs;
msgs.addr = dev->client_addr;
msgs.flags = RT_I2C_WR;
msgs.buf = data;
msgs.len = len;
if (rt_i2c_transfer(dev->bus, &msgs, 1) == 1)
{
return RT_EOK;
}
else
{
return -RT_ERROR;
}
}
static rt_err_t gt911_read_regs(struct rt_i2c_client *dev, rt_uint8_t *reg, rt_uint8_t *data, rt_uint8_t len)
{
struct rt_i2c_msg msgs[2];
msgs[0].addr = dev->client_addr;
msgs[0].flags = RT_I2C_WR;
msgs[0].buf = reg;
msgs[0].len = GT911_REGITER_LEN;
msgs[1].addr = dev->client_addr;
msgs[1].flags = RT_I2C_RD;
msgs[1].buf = data;
msgs[1].len = len;
if (rt_i2c_transfer(dev->bus, msgs, 2) == 2)
{
return RT_EOK;
}
else
{
return -RT_ERROR;
}
}
static rt_err_t gt911_get_product_id(struct rt_i2c_client *dev, rt_uint8_t *data, rt_uint8_t len)
{
rt_uint8_t reg[2];
reg[0] = (rt_uint8_t)(GT911_PRODUCT_ID >> 8);
reg[1] = (rt_uint8_t)(GT911_PRODUCT_ID & 0xff);
if (gt911_read_regs(dev, reg, data, len) != RT_EOK)
{
LOG_E("read id failed");
return -RT_ERROR;
}
return RT_EOK;
}
static rt_err_t gt911_get_info(struct rt_i2c_client *dev, struct rt_touch_info *info)
{
rt_uint8_t reg[2];
rt_uint8_t out_info[7];
rt_uint8_t out_len = 7;
reg[0] = (rt_uint8_t)(GT911_CONFIG_REG >> 8);
reg[1] = (rt_uint8_t)(GT911_CONFIG_REG & 0xFF);
if(gt911_read_regs(dev, reg, out_info, out_len) != RT_EOK)
{
LOG_E("read info failed");
return -RT_ERROR;
}
info->range_x = (out_info[2] << 8) | out_info[1];
info->range_y = (out_info[4] << 8) | out_info[3];
info->point_num = out_info[5] & 0x0f;
return RT_EOK;
}
static rt_err_t gt911_soft_reset(struct rt_i2c_client *dev)
{
rt_uint8_t buf[3];
buf[0] = (rt_uint8_t)(GT911_COMMAND_REG >> 8);
buf[1] = (rt_uint8_t)(GT911_COMMAND_REG & 0xFF);
buf[2] = 0x02;
if(gt911_write_reg(dev, buf, 3) != RT_EOK)
{
LOG_E("soft reset failed");
return -RT_ERROR;
}
return RT_EOK;
}
static int16_t pre_x[GT911_MAX_TOUCH] = {-1, -1, -1, -1, -1};
static int16_t pre_y[GT911_MAX_TOUCH] = {-1, -1, -1, -1, -1};
static int16_t pre_w[GT911_MAX_TOUCH] = {-1, -1, -1, -1, -1};
static rt_uint8_t s_tp_dowm[GT911_MAX_TOUCH];
static struct rt_touch_data *read_data;
static void gt911_touch_up(void *buf, int8_t id)
{
read_data = (struct rt_touch_data *)buf;
if(s_tp_dowm[id] == 1)
{
s_tp_dowm[id] = 0;
read_data[id].event = RT_TOUCH_EVENT_UP;
}
else
{
read_data[id].event = RT_TOUCH_EVENT_NONE;
}
read_data[id].timestamp = rt_touch_get_ts();
read_data[id].width = pre_w[id];
read_data[id].x_coordinate = pre_x[id];
read_data[id].y_coordinate = pre_y[id];
read_data[id].track_id = id;
pre_x[id] = -1; /* last point is none */
pre_y[id] = -1;
pre_w[id] = -1;
}
static void gt911_touch_down(void *buf, int8_t id, int16_t x, int16_t y, int16_t w)
{
read_data = (struct rt_touch_data *)buf;
if (s_tp_dowm[id] == 1)
{
read_data[id].event = RT_TOUCH_EVENT_MOVE;
}
else
{
read_data[id].event = RT_TOUCH_EVENT_DOWN;
s_tp_dowm[id] = 1;
}
read_data[id].timestamp = rt_touch_get_ts();
read_data[id].width = w;
read_data[id].x_coordinate = x;
read_data[id].y_coordinate = y;
read_data[id].track_id = id;
pre_x[id] = x; /* save last point */
pre_y[id] = y;
pre_w[id] = w;
}
static rt_size_t gt911_read_point(struct rt_touch_device *touch, void *buf, rt_size_t read_num)
{
rt_uint8_t point_status = 0;
rt_uint8_t touch_num = 0;
rt_uint8_t write_buf[3];
rt_uint8_t cmd[2];
rt_uint8_t read_buf[8 * GT911_MAX_TOUCH] = {0};
rt_uint8_t read_index;
int8_t read_id = 0;
int16_t input_x = 0;
int16_t input_y = 0;
int16_t input_w = 0;
static rt_uint8_t pre_touch = 0;
static int8_t pre_id[GT911_MAX_TOUCH] = {0};
/* point status register */
cmd[0] = (rt_uint8_t)((GT911_READ_STATUS >> 8) & 0xFF);
cmd[1] = (rt_uint8_t)(GT911_READ_STATUS & 0xFF);
if (gt911_read_regs(&gt911_client, cmd, &point_status, 1) != RT_EOK)
{
LOG_D("read point failed\n");
read_num = 0;
goto exit_;
}
if (point_status == 0) /* no data */
{
read_num = 0;
goto exit_;
}
if ((point_status & 0x80) == 0) /* data is not ready */
{
read_num = 0;
goto exit_;
}
touch_num = point_status & 0x0f; /* get point num */
if (touch_num > GT911_MAX_TOUCH) /* point num is not correct */
{
read_num = 0;
goto exit_;
}
cmd[0] = (rt_uint8_t)((GT911_POINT1_REG >> 8) & 0xFF);
cmd[1] = (rt_uint8_t)(GT911_POINT1_REG & 0xFF);
/* read point num is touch_num */
if(gt911_read_regs(&gt911_client, cmd, read_buf, read_num * GT911_POINT_INFO_NUM) !=RT_EOK)
{
LOG_D("read point failed\n");
read_num = 0;
goto exit_;
}
if(pre_touch > touch_num) /* point up */
{
for (read_index = 0; read_index < pre_touch; read_index++)
{
rt_uint8_t j;
for (j = 0; j < touch_num; j++) /* this time touch num */
{
read_id = read_buf[j * 8] & 0x0F;
if (pre_id[read_index] == read_id) /* this id is not free */
{
break;
}
if (j >= touch_num - 1)
{
rt_uint8_t up_id;
up_id = pre_id[read_index];
gt911_touch_up(buf, up_id);
}
}
}
}
if(touch_num) /* point down */
{
rt_uint8_t off_set;
for(read_index = 0; read_index < touch_num; read_index++)
{
off_set = read_index * 8;
read_id = read_buf[off_set] & 0x0f;
pre_id[read_index] = read_id;
input_x = read_buf[off_set + 1] | (read_buf[off_set + 2] << 8); /* x */
input_y = read_buf[off_set + 3] | (read_buf[off_set + 4] << 8); /* y */
input_w = read_buf[off_set + 5] | (read_buf[off_set + 6] << 8); /* size */
gt911_touch_down(buf, read_id, input_x, input_y, input_w);
}
}
else if (pre_touch)
{
for(read_index = 0; read_index < pre_touch; read_index++)
{
gt911_touch_up(buf, pre_id[read_index]);
}
}
pre_touch = touch_num;
exit_:
write_buf[0] = (rt_uint8_t)((GT911_READ_STATUS >> 8) & 0xFF);
write_buf[1] = (rt_uint8_t)(GT911_READ_STATUS & 0xFF);
write_buf[2] = 0x00;
gt911_write_reg(&gt911_client, write_buf, 3);
return read_num;
}
static rt_err_t gt911_control(struct rt_touch_device *touch, int cmd, void *arg)
{
if (cmd == RT_TOUCH_CTRL_GET_ID)
{
return gt911_get_product_id(&gt911_client, arg, 6);
}
if (cmd == RT_TOUCH_CTRL_GET_INFO)
{
return gt911_get_info(&gt911_client, arg);
}
rt_uint8_t buf[4];
rt_uint8_t i = 0;
rt_uint8_t *config = RT_NULL;
config = (rt_uint8_t *)rt_calloc(1, sizeof(GT911_CFG_TBL) + GT911_REGITER_LEN);
if(config == RT_NULL)
{
LOG_D("malloc config memory failed\n");
return -RT_ERROR;
}
config[0] = (rt_uint8_t)((GT911_CONFIG_REG >> 8) & 0xFF);
config[1] = (rt_uint8_t)(GT911_CONFIG_REG & 0xFF);
memcpy(&config[2], GT911_CFG_TBL, sizeof(GT911_CFG_TBL));
switch(cmd)
{
case RT_TOUCH_CTRL_SET_X_RANGE:
{
rt_uint16_t x_range;
x_range = *(rt_uint16_t *)arg;
config[4] = (rt_uint8_t)(x_range >> 8);
config[3] = (rt_uint8_t)(x_range & 0xff);
GT911_CFG_TBL[2] = config[4];
GT911_CFG_TBL[1] = config[3];
break;
}
case RT_TOUCH_CTRL_SET_Y_RANGE:
{
rt_uint16_t y_range;
y_range = *(rt_uint16_t *)arg;
config[6] = (rt_uint8_t)(y_range >> 8);
config[5] = (rt_uint8_t)(y_range & 0xff);
GT911_CFG_TBL[4] = config[6];
GT911_CFG_TBL[3] = config[5];
break;
}
case RT_TOUCH_CTRL_SET_X_TO_Y:
{
config[8] ^= (1 << 3);
break;
}
case RT_TOUCH_CTRL_SET_MODE:
{
rt_uint16_t trig_type;
trig_type = *(rt_uint16_t *)arg;
switch (trig_type)
{
case RT_DEVICE_FLAG_INT_RX:
config[8] &= 0xFC;
break;
case RT_DEVICE_FLAG_RDONLY:
config[8] &= 0xFC;
config[8] |= 0x02;
break;
default:
break;
}
break;
}
default:
{
break;
}
}
if(gt911_write_reg(&gt911_client, config, sizeof(GT911_CFG_TBL) + GT911_ADDR_LEN) != RT_EOK)
{
LOG_D("send config failed");
return -1;
}
buf[0] = (rt_uint8_t)((GT911_CHECK_SUM >> 8) & 0xFF);
buf[1] = (rt_uint8_t)(GT911_CHECK_SUM & 0xFF);
buf[2] = 0;
for(i = GT911_ADDR_LEN; i < sizeof(GT911_CFG_TBL) + GT911_ADDR_LEN; i++)
{
buf[GT911_ADDR_LEN] += config[i];
}
buf[2] = (~buf[2]) + 1;
buf[3] = 1;
gt911_write_reg(&gt911_client, buf, 4);
rt_free(config);
return RT_EOK;
}
static struct rt_touch_ops gt911_touch_ops =
{
.touch_readpoint = gt911_read_point,
.touch_control = gt911_control,
};
int rt_hw_gt911_init(const char *name, struct rt_touch_config *cfg)
{
struct rt_touch_device *touch_device = RT_NULL;
touch_device = (struct rt_touch_device *)rt_malloc(sizeof(struct rt_touch_device));
if(touch_device == RT_NULL)
{
LOG_E("touch device malloc fail");
return -RT_ERROR;
}
rt_memset((void *)touch_device, 0, sizeof(struct rt_touch_device));
/* hw init*/
rt_pin_mode(*(rt_uint8_t *)cfg->user_data, PIN_MODE_OUTPUT);
rt_pin_mode(cfg->irq_pin.pin, PIN_MODE_OUTPUT);
rt_pin_write(*(rt_uint8_t *)cfg->user_data, PIN_LOW);
rt_thread_delay(10);
rt_pin_write(*(rt_uint8_t *)cfg->user_data, PIN_HIGH);
rt_thread_delay(10);
rt_pin_write(cfg->irq_pin.pin, PIN_MODE_INPUT);
rt_thread_delay(100);
gt911_client.bus = (struct rt_i2c_bus_device *)rt_device_find(cfg->dev_name);
if(gt911_client.bus == RT_NULL)
{
LOG_E("Can't find %s device", cfg->dev_name);
return -RT_ERROR;
}
if(rt_device_open((rt_device_t)gt911_client.bus, RT_DEVICE_FLAG_RDWR) != RT_EOK)
{
LOG_E("open %s device failed", cfg->dev_name);
return -RT_ERROR;
}
gt911_client.client_addr = GT911_ADDRESS_HIGH;
gt911_soft_reset(&gt911_client);
/* register touch device */
touch_device->info.type = RT_TOUCH_TYPE_CAPACITANCE;
touch_device->info.vendor = RT_TOUCH_VENDOR_GT;
rt_memcpy(&touch_device->config, cfg, sizeof(struct rt_touch_config));
touch_device->ops = &gt911_touch_ops;
rt_hw_touch_register(touch_device, name, RT_DEVICE_FLAG_INT_RX, RT_NULL);
LOG_I("touch device gt911 init success");
return RT_EOK;
}
int gt911_init(void)
{
struct rt_touch_config cfg;
rt_uint8_t rst_pin;
rst_pin = RST_PIN;
cfg.dev_name = "i2c3";
cfg.irq_pin.pin = IRQ_PIN;
cfg.irq_pin.mode = PIN_MODE_INPUT_PULLDOWN;
cfg.user_data = &rst_pin;
rt_hw_gt911_init("gt911", &cfg);
return RT_EOK;
}
INIT_DEVICE_EXPORT(gt911_init);
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