添加ads111x驱动,侦测各电源总线状态

applications/drv/drv_ads111x.c

@@ -0,0 +1,226 @@
+/*
+ * Copyright (c) 2025, Your Name
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2025-12-27     Developer    First version for ADS1115 on RT-Thread
+ */
+
+#include <rtthread.h>
+#include <rtdevice.h>
+#include <board.h>
+#include "Variable.h"
+
+#define DBG_TAG "sensor.ads1115"
+#define DBG_LVL DBG_LOG
+#include <rtdbg.h>
+
+/* ADS1115 I2C 地址（A0 引脚接地时为 0x48） */
+#define ADS1115_I2C_ADDR        0x48
+/* 使用的 I2C 总线设备名 */
+#define ADS1115_I2C_BUS_NAME    "i2c2"   // 根据你的板子修改，如 "i2c1"
+
+/* ADS1115 寄存器地址 */
+#define ADS1115_REG_CONVERT     0x00
+#define ADS1115_REG_CONFIG      0x01
+
+static struct rt_i2c_bus_device *i2c_bus = RT_NULL;
+
+/**
+ * 向 ADS1115 写入配置寄存器
+ */
+static rt_err_t ads1115_write_config(rt_uint16_t config)
+{
+    rt_uint8_t buf[3] = {
+        ADS1115_REG_CONFIG,
+        (rt_uint8_t)(config >> 8),
+        (rt_uint8_t)(config & 0xFF)
+    };
+
+    struct rt_i2c_msg msgs[1] = {
+        {
+            .addr  = ADS1115_I2C_ADDR,
+            .flags = RT_I2C_WR,
+            .buf   = buf,
+            .len   = 3,
+        }
+    };
+
+    if (rt_i2c_transfer(i2c_bus, msgs, 1) != 1)
+    {
+        LOG_E("Failed to write config register.");
+        return -RT_ERROR;
+    }
+    return RT_EOK;
+}
+
+/**
+ * 从 ADS1115 读取转换结果
+ */
+static rt_err_t ads1115_read_conversion(rt_int16_t *value)
+{
+    rt_uint8_t buf[2] = {0};
+
+    struct rt_i2c_msg msgs[2] = {
+        {
+            .addr  = ADS1115_I2C_ADDR,
+            .flags = RT_I2C_WR,
+            .buf   = (rt_uint8_t[]){ADS1115_REG_CONVERT},
+            .len   = 1,
+        },
+        {
+            .addr  = ADS1115_I2C_ADDR,
+            .flags = RT_I2C_RD,
+            .buf   = buf,
+            .len   = 2,
+        }
+    };
+
+    if (rt_i2c_transfer(i2c_bus, msgs, 2) != 2)
+    {
+        LOG_E("Failed to read conversion register.");
+        return -RT_ERROR;
+    }
+
+    *value = (rt_int16_t)((buf[0] << 8) | buf[1]);
+    return RT_EOK;
+}
+
+/**
+ * 读取指定通道的 ADC 值（单端输入）
+ * channel: 0 ~ 3 (对应 AIN0~AIN3 对 GND)
+ * 返回：RT_EOK 或错误码
+ */
+static rt_err_t ads1115_read_channel(rt_uint8_t channel, rt_int16_t *raw_value)
+{
+    if (channel > 3)
+    {
+        LOG_E("Invalid channel: %d", channel);
+        return -RT_EINVAL;
+    }
+
+    // 配置：OS=1, MUX=100+ch (单端), PGA=001 (±4.096V), MODE=1 (single), DR=100 (128SPS)
+    rt_uint16_t config = 0x8000 |                     // OS = 1
+                         ((0x04 | channel) << 12) |   // MUX: AINx vs GND
+                         (0x01 << 9) |                // PGA = ±4.096V
+                         (0x01 << 8) |                // MODE = single-shot
+                         (0x04 << 5);                 // DR = 128 SPS
+
+    if (ads1115_write_config(config) != RT_EOK)
+    {
+        return -RT_ERROR;
+    }
+
+    rt_thread_mdelay(10); // 等待转换完成（128SPS ≈ 8ms）
+
+    return ads1115_read_conversion(raw_value);
+}
+
+
+/**
+ * 将原始 ADC 值转换为毫伏（mV）
+ * 假设使用 ±2.048V 量程（PGA=1），则 LSB = 2.048V / 32768 ≈ 0.0625 mV/LSB
+ * 但因为是单端且参考地，实际范围 0~2.048V → 满量程 2.048V = 32768 LSB
+ * 所以：Voltage(mV) = raw * (2048 / 32768) = raw * 0.0625
+ */
+static rt_int32_t ads1115_raw_to_mv(rt_int16_t raw)
+{
+    /* 注意：单端模式下，raw 应为正数（0 ~ 32767）*/
+    return (rt_int32_t)(((rt_int64_t)raw * 125) / 1000); // 等价于 raw * 0.0625 * 1000
+}
+
+/**
+ * ADS1115 读取线程（示例：读取 AIN0）
+ */
+static void ads1115_thread_entry(void *parameter)
+{
+    rt_int16_t raw = 0 ,mt = 3600;
+
+    while (1)
+    {
+        if(mt>3600)
+        {
+            if (ads1115_read_channel(0, &raw) == RT_EOK)
+            {
+                pow_bat = ads1115_raw_to_mv(raw);
+            }
+            else
+            {
+                LOG_E("Failed to read ADS1115 P_BAT");
+            }
+        }
+        else
+        {
+            mt = 0;
+        }
+
+        if (ads1115_read_channel(1, &raw) == RT_EOK)
+        {
+            pow_code = ads1115_raw_to_mv(raw);
+        }
+        else
+        {
+            LOG_E("Failed to read ADS1115 P_CODE");
+        }
+
+        if (ads1115_read_channel(2, &raw) == RT_EOK)
+        {
+            pow_dev1 = ads1115_raw_to_mv(raw);
+        }
+        else
+        {
+            LOG_E("Failed to read ADS1115 P_DEV1");
+        }
+
+        if (ads1115_read_channel(3, &raw) == RT_EOK)
+        {
+            pow_dev2 = ads1115_raw_to_mv(raw);
+        }
+        else
+        {
+            LOG_E("Failed to read ADS1115 P_DEV2");
+        }
+
+
+        rt_thread_mdelay(1000); // 每  秒读取一次
+    }
+}
+
+/**
+ * ADS1115 驱动初始化函数
+ */
+static int rt_hw_ads1115_init(void)
+{
+    i2c_bus = rt_i2c_bus_device_find(ADS1115_I2C_BUS_NAME);
+    if (i2c_bus == RT_NULL)
+    {
+        LOG_E("Failed to find I2C bus: %s", ADS1115_I2C_BUS_NAME);
+        return -RT_ENOSYS;
+    }
+
+    LOG_I("Found I2C bus: %s", ADS1115_I2C_BUS_NAME);
+
+    /* 创建读取线程 */
+    rt_thread_t tid = rt_thread_create("ads1115",
+                                       ads1115_thread_entry,
+                                       RT_NULL,
+                                       512,
+                                       RT_THREAD_PRIORITY_MAX - 2,
+                                       10);
+    if (tid != RT_NULL)
+    {
+        rt_thread_startup(tid);
+    }
+    else
+    {
+        LOG_E("Failed to create ADS1115 thread.");
+        return -RT_ERROR;
+    }
+
+    return RT_EOK;
+}
+
+/* 自动初始化 */
+INIT_APP_EXPORT(rt_hw_ads1115_init);