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fix GT911 show error the first time #238

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fix GT911 show error the first time #238

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16 changes: 16 additions & 0 deletions lvgl_touch/Kconfig
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Original file line number Diff line number Diff line change
Expand Up @@ -459,6 +459,22 @@ menu "LVGL Touch controller"
prompt "Invert Y coordinate value."
default y

config GT911_INT_PIN
int
prompt "GPIO for GT911 Interrupt"

default 40
help
Configure the touchpanel MISO pin here.

config GT911_RST_PIN
int
prompt "GPIO for GT911 Reset"

default 39
help
Configure the touchpanel MOSI pin here.

endmenu

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36 changes: 35 additions & 1 deletion lvgl_touch/gt911.c
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Original file line number Diff line number Diff line change
Expand Up @@ -42,6 +42,38 @@ esp_err_t gt911_i2c_write8(uint8_t slave_addr, uint16_t register_addr, uint8_t d
return lvgl_i2c_write(CONFIG_LV_I2C_TOUCH_PORT, slave_addr, register_addr | I2C_REG_16, &buffer, 1);
}

/**
* @brief set GT911 slave address via RST and INT pin
* @param dev_addr: Device address on communication Bus (I2C slave address of GT911).
* @retval None
*/
void gt911_set_addr(uint8_t dev_addr){
//fix show error the first time
gpio_config_t io_conf;
io_conf.intr_type = GPIO_INTR_DISABLE;
io_conf.mode = GPIO_MODE_OUTPUT;
io_conf.pin_bit_mask = (1ULL << CONFIG_GT911_INT_PIN)|(1ULL << CONFIG_GT911_RST_PIN);
io_conf.pull_down_en = 0;
io_conf.pull_up_en = 0;
gpio_config(&io_conf);
gpio_pad_select_gpio(CONFIG_GT911_INT_PIN);
gpio_set_direction(CONFIG_GT911_INT_PIN, GPIO_MODE_OUTPUT);
gpio_pad_select_gpio(CONFIG_GT911_RST_PIN);
gpio_set_direction(CONFIG_GT911_RST_PIN, GPIO_MODE_OUTPUT);

// 设置引脚电平
gpio_set_level(CONFIG_GT911_INT_PIN, 0);
gpio_set_level(CONFIG_GT911_RST_PIN, 0);
vTaskDelay(pdMS_TO_TICKS(10));
gpio_set_level(CONFIG_GT911_INT_PIN, GT911_I2C_SLAVE_ADDR==0x29);
vTaskDelay(pdMS_TO_TICKS(1));
gpio_set_level(CONFIG_GT911_RST_PIN, 1);
vTaskDelay(pdMS_TO_TICKS(5));
gpio_set_level(CONFIG_GT911_INT_PIN, 0);
vTaskDelay(pdMS_TO_TICKS(50));
vTaskDelay(pdMS_TO_TICKS(50));
}

/**
* @brief Initialize for GT911 communication via I2C
* @param dev_addr: Device address on communication Bus (I2C slave address of GT911).
Expand All @@ -53,10 +85,12 @@ void gt911_init(uint8_t dev_addr) {
uint8_t data_buf;
esp_err_t ret;

gt911_set_addr(dev_addr);//fix show error the first time

ESP_LOGI(TAG, "Checking for GT911 Touch Controller");
if ((ret = gt911_i2c_read(dev_addr, GT911_PRODUCT_ID1, &data_buf, 1) != ESP_OK)) {
ESP_LOGE(TAG, "Error reading from device: %s",
esp_err_to_name(ret)); // Only show error the first time
esp_err_to_name(ret));
return;
}

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