/* * 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 #include #include #include #define DBG_TAG "gt911" #define DBG_LVL DBG_INFO #include #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(>911_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(>911_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(>911_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(>911_client, arg, 6); } if (cmd == RT_TOUCH_CTRL_GET_INFO) { return gt911_get_info(>911_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(>911_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(>911_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(>911_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 = >911_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);