增加屏幕驱动

2026-07-30 19:20:34 +08:00
parent 2306a0272c
commit cef702dba0
6 changed files with 195 additions and 8 deletions
@@ -0,0 +1,65 @@
+#include "iic.h"
+#include "driver/i2c_master.h"
+#include "esp_log.h"
+#include <stdint.h>
+
+static const char *TAG = "IIC";
+
+static i2c_master_bus_handle_t s_iic_bus = NULL;
+static i2c_master_dev_handle_t s_iic_dev = NULL;
+
+esp_err_t iic_init(void)
+{
+    i2c_master_bus_config_t bus_cfg = {
+        .i2c_port = -1,
+        .sda_io_num = (gpio_num_t)IIC_SDA_IO,
+        .scl_io_num = (gpio_num_t)IIC_SCL_IO,
+        .clk_source = I2C_CLK_SRC_DEFAULT,
+        .glitch_ignore_cnt = 7,
+        .trans_queue_depth = 0,
+        .flags.enable_internal_pullup = true,
+    };
+    esp_err_t ret = i2c_new_master_bus(&bus_cfg, &s_iic_bus);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "IIC总线初始化失败");
+        return ret;
+    }
+
+    i2c_device_config_t dev_cfg = {
+        .dev_addr_length = I2C_ADDR_BIT_LEN_7,
+        .device_address = 0x00,
+        .scl_speed_hz = IIC_FREQ_HZ,
+    };
+    ret = i2c_master_bus_add_device(s_iic_bus, &dev_cfg, &s_iic_dev);
+    if (ret != ESP_OK) {
+        ESP_LOGE(TAG, "IIC总线初始化失败");
+        return ret;
+    }
+    ESP_LOGI(TAG, "IIC IO总线初始化成功");
+    return ESP_OK;
+}
+
+esp_err_t iic_send_bytes(unsigned char addr, unsigned char *txd, unsigned int len)
+{
+    if (txd == NULL || len == 0 || s_iic_dev == NULL) {
+        return ESP_ERR_INVALID_STATE;
+    }
+    esp_err_t ret = i2c_master_device_change_address(s_iic_dev, (uint16_t)addr, IIC_TIMEOUT_MS);
+    if (ret != ESP_OK) {
+        return ret;
+    }
+    return i2c_master_transmit(s_iic_dev, (const uint8_t *)txd, (size_t)len, IIC_TIMEOUT_MS);
+}
+
+unsigned char iic_read_byte(unsigned char addr)
+{
+    uint8_t byte = 0;
+    if (s_iic_dev == NULL) {
+        return 0;
+    }
+    if (i2c_master_device_change_address(s_iic_dev, (uint16_t)addr, IIC_TIMEOUT_MS) != ESP_OK) {
+        return 0;
+    }
+    i2c_master_receive(s_iic_dev, &byte, 1, IIC_TIMEOUT_MS);
+    return (unsigned char)byte;
+}