feat: 添加 CST816 触摸屏驱动支持及相关配置

main/idf_component.yml

@@ -5,8 +5,9 @@ dependencies:
   espressif/esp_wifi_remote:
     version: ">=0.10,<2.0"
     rules:
-      - if: "target in [esp32p4, esp32h2]"
+      - if: target in [esp32p4, esp32h2]
   espressif/esp_hosted:
-    version: "~2"
+    version: ~2
     rules:
-      - if: "target in [esp32p4, esp32h2]"
+      - if: target in [esp32p4, esp32h2]
+  espp/cst816: ^0.22.0

main/main.c

@@ -132,6 +132,52 @@
 #define EXAMPLE_LVGL_TASK_STACK_SIZE (4 * 1024)
 #define EXAMPLE_LVGL_TASK_PRIORITY 2
 
+// 开启触摸屏支持
+#define CONFIG_EXAMPLE_LCD_TOUCH_ENABLED 0
+
+// 添加 CST816 驱动代码
+#define CST816_I2C_ADDR 0x15
+
+typedef struct {
+  uint16_t x;
+  uint16_t y;
+  uint8_t touched;
+} cst816_data_t;
+
+static bool cst816_read_touch(cst816_data_t *data) {
+  uint8_t reg = 0x02; // 触摸点数寄存器
+  uint8_t buffer[5];
+
+  i2c_cmd_handle_t cmd = i2c_cmd_link_create();
+  i2c_master_start(cmd);
+  i2c_master_write_byte(cmd, (CST816_I2C_ADDR << 1) | I2C_MASTER_WRITE, true);
+  i2c_master_write_byte(cmd, reg, true);
+  i2c_master_start(cmd);
+  i2c_master_write_byte(cmd, (CST816_I2C_ADDR << 1) | I2C_MASTER_READ, true);
+  i2c_master_read_byte(cmd, buffer, I2C_MASTER_ACK);
+  i2c_master_read_byte(cmd, buffer + 1, I2C_MASTER_ACK);
+  i2c_master_read_byte(cmd, buffer + 2, I2C_MASTER_ACK);
+  i2c_master_read_byte(cmd, buffer + 3, I2C_MASTER_ACK);
+  i2c_master_read_byte(cmd, buffer + 4, I2C_MASTER_NACK);
+  i2c_master_stop(cmd);
+
+  esp_err_t ret =
+      i2c_master_cmd_begin(TOUCH_I2C_MASTER_NUM, cmd, pdMS_TO_TICKS(100));
+  i2c_cmd_link_delete(cmd);
+
+  if (ret != ESP_OK) {
+    return false;
+  }
+
+  data->touched = buffer[0] > 0;
+  if (data->touched) {
+    data->x = ((buffer[1] & 0x0F) << 8) | buffer[2];
+    data->y = ((buffer[3] & 0x0F) << 8) | buffer[4];
+    return true;
+  }
+  return false;
+}
+
 // LVGL library is not thread-safe, this example will call LVGL APIs from
 // different tasks, so use a mutex to protect it
 static _lock_t lvgl_api_lock;