feat(ads1x15): update to use pure read function and protect internal read_two function with mutex to make API more consistent with the other analog expander classes

Author: finger563

components/ads1x15/example/main/ads1x15_example.cpp

@@ -43,10 +43,9 @@ extern "C" void app_main(void) {
                                             I2C_TIMEOUT_MS / portTICK_PERIOD_MS);
       return err == ESP_OK;
     };
-    auto ads_read = [](uint8_t dev_addr, uint8_t reg_addr, uint8_t *data, size_t data_len) {
-      auto err = i2c_master_write_read_device(I2C_NUM, dev_addr, &reg_addr,
-                                              1, // size of addr
-                                              data, data_len, I2C_TIMEOUT_MS / portTICK_PERIOD_MS);
+    auto ads_read = [](uint8_t dev_addr, uint8_t *data, size_t data_len) {
+      auto err = i2c_master_read_from_device(I2C_NUM, dev_addr,
+                                             data, data_len, I2C_TIMEOUT_MS / portTICK_PERIOD_MS);
       return err == ESP_OK;
     };
     // make the actual ads class

components/ads1x15/include/ads1x15.hpp

@@ -2,6 +2,7 @@
 
 #include <chrono>
 #include <functional>
+#include <mutex>
 #include <thread>
 
 #include "logger.hpp"
@@ -29,12 +30,11 @@ class Ads1x15 {
   /**
    * @brief Function to read bytes from the device.
    * @param dev_addr Address of the device to write to.
-   * @param reg_addr Register address to read from.
    * @param data Pointer to array of bytes to read into.
    * @param data_len Number of data bytes to read.
    * @return True if the read was successful.
    */
-  typedef std::function<bool(uint8_t dev_addr, uint8_t reg_addr, uint8_t *data, size_t data_len)>
+  typedef std::function<bool(uint8_t dev_addr, uint8_t *data, size_t data_len)>
       read_fn;
 
   /**
@@ -167,8 +167,18 @@ class Ads1x15 {
   }
 
   uint16_t read_two_(uint8_t reg_addr, std::error_code &ec) {
+    // lock the mutex so that we don't have multiple threads trying to read
+    // from the device at the same time
+    std::lock_guard<std::mutex> lock(mutex_);
+    // write the reg addr we want to read from
+    bool success = write_(address_, &reg_addr, 1);
+    if (!success) {
+      ec = std::make_error_code(std::errc::io_error);
+      return 0;
+    }
+    // then read the two bytes
     uint8_t data[2];
-    bool success = read_(address_, reg_addr, data, 2);
+    success = read_(address_, data, 2);
     if (!success) {
       ec = std::make_error_code(std::errc::io_error);
       return 0;
@@ -202,6 +212,7 @@ class Ads1x15 {
   uint8_t address_;
   write_fn write_;
   read_fn read_;
+  std::mutex mutex_;
   espp::Logger logger_;
 };
 } // namespace espp

docs/adc/adc_types.html

@@ -145,7 +145,7 @@
           <li><a href="index.html">ADC APIs</a> &raquo;</li>
       <li>ADC Types</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/adc/adc_types.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/adc/adc_types.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>
@@ -162,7 +162,7 @@ <h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to
 <section id="header-file">
 <h3>Header File<a class="headerlink" href="#header-file" title="Permalink to this headline"></a></h3>
 <ul class="simple">
-<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/57b5b0c/components/adc/include/adc_types.hpp">components/adc/include/adc_types.hpp</a></p></li>
+<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/e2d5c8f/components/adc/include/adc_types.hpp">components/adc/include/adc_types.hpp</a></p></li>
 </ul>
 </section>
 </section>

docs/adc/ads1x15.html

@@ -146,7 +146,7 @@
           <li><a href="index.html">ADC APIs</a> &raquo;</li>
       <li>ADS1x15 I2C ADC</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/adc/ads1x15.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/adc/ads1x15.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>
@@ -163,7 +163,7 @@ <h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to
 <section id="header-file">
 <h3>Header File<a class="headerlink" href="#header-file" title="Permalink to this headline"></a></h3>
 <ul class="simple">
-<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/57b5b0c/components/ads1x15/include/ads1x15.hpp">components/ads1x15/include/ads1x15.hpp</a></p></li>
+<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/e2d5c8f/components/ads1x15/include/ads1x15.hpp">components/ads1x15/include/ads1x15.hpp</a></p></li>
 </ul>
 </section>
 <section id="classes">
@@ -196,10 +196,9 @@ <h4>ADS1X15 Example<a class="headerlink" href="#classespp_1_1_ads1x15_1ads1x15_e
 <span class="w">                                            </span><span class="n">I2C_TIMEOUT_MS</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">portTICK_PERIOD_MS</span><span class="p">);</span>
 <span class="w">      </span><span class="k">return</span><span class="w"> </span><span class="n">err</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">ESP_OK</span><span class="p">;</span>
 <span class="w">    </span><span class="p">};</span>
-<span class="w">    </span><span class="k">auto</span><span class="w"> </span><span class="n">ads_read</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[](</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">dev_addr</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">reg_addr</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">data</span><span class="p">,</span><span class="w"> </span><span class="kt">size_t</span><span class="w"> </span><span class="n">data_len</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
-<span class="w">      </span><span class="k">auto</span><span class="w"> </span><span class="n">err</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">i2c_master_write_read_device</span><span class="p">(</span><span class="n">I2C_NUM</span><span class="p">,</span><span class="w"> </span><span class="n">dev_addr</span><span class="p">,</span><span class="w"> </span><span class="o">&amp;</span><span class="n">reg_addr</span><span class="p">,</span>
-<span class="w">                                              </span><span class="mi">1</span><span class="p">,</span><span class="w"> </span><span class="c1">// size of addr</span>
-<span class="w">                                              </span><span class="n">data</span><span class="p">,</span><span class="w"> </span><span class="n">data_len</span><span class="p">,</span><span class="w"> </span><span class="n">I2C_TIMEOUT_MS</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">portTICK_PERIOD_MS</span><span class="p">);</span>
+<span class="w">    </span><span class="k">auto</span><span class="w"> </span><span class="n">ads_read</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="p">[](</span><span class="kt">uint8_t</span><span class="w"> </span><span class="n">dev_addr</span><span class="p">,</span><span class="w"> </span><span class="kt">uint8_t</span><span class="w"> </span><span class="o">*</span><span class="n">data</span><span class="p">,</span><span class="w"> </span><span class="kt">size_t</span><span class="w"> </span><span class="n">data_len</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">      </span><span class="k">auto</span><span class="w"> </span><span class="n">err</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">i2c_master_read_from_device</span><span class="p">(</span><span class="n">I2C_NUM</span><span class="p">,</span><span class="w"> </span><span class="n">dev_addr</span><span class="p">,</span>
+<span class="w">                                             </span><span class="n">data</span><span class="p">,</span><span class="w"> </span><span class="n">data_len</span><span class="p">,</span><span class="w"> </span><span class="n">I2C_TIMEOUT_MS</span><span class="w"> </span><span class="o">/</span><span class="w"> </span><span class="n">portTICK_PERIOD_MS</span><span class="p">);</span>
 <span class="w">      </span><span class="k">return</span><span class="w"> </span><span class="n">err</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="n">ESP_OK</span><span class="p">;</span>
 <span class="w">    </span><span class="p">};</span>
 <span class="w">    </span><span class="c1">// make the actual ads class</span>
@@ -412,23 +411,20 @@ <h4>ADS1X15 Example<a class="headerlink" href="#classespp_1_1_ads1x15_1ads1x15_e
 
 <dl class="cpp type">
 <dt class="sig sig-object cpp" id="_CPPv4N4espp7Ads1x157read_fnE">
-<span id="_CPPv3N4espp7Ads1x157read_fnE"></span><span id="_CPPv2N4espp7Ads1x157read_fnE"></span><span id="espp::Ads1x15::read_fn"></span><span class="target" id="classespp_1_1_ads1x15_1aecd513e77ac87d7ebae9f5564271d8b0"></span><span class="k"><span class="pre">typedef</span></span><span class="w"> </span><span class="n"><span class="pre">std</span></span><span class="p"><span class="pre">::</span></span><span class="n"><span class="pre">function</span></span><span class="p"><span class="pre">&lt;</span></span><span class="kt"><span class="pre">bool</span></span><span class="p"><span class="pre">(</span></span><span class="n"><span class="pre">uint8_t</span></span><span class="w"> </span><span class="n"><span class="pre">dev_addr</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="n"><span class="pre">uint8_t</span></span><span class="w"> </span><span class="n"><span class="pre">reg_addr</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="n"><span class="pre">uint8_t</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">data</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="n"><span class="pre">size_t</span></span><span class="w"> </span><span class="n"><span class="pre">data_len</span></span><span class="p"><span class="pre">)</span></span><span class="p"><span class="pre">&gt;</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">read_fn</span></span></span><a class="headerlink" href="#_CPPv4N4espp7Ads1x157read_fnE" title="Permalink to this definition"></a><br /></dt>
+<span id="_CPPv3N4espp7Ads1x157read_fnE"></span><span id="_CPPv2N4espp7Ads1x157read_fnE"></span><span id="espp::Ads1x15::read_fn"></span><span class="target" id="classespp_1_1_ads1x15_1a0cf2985d72eef846708a709cfffc75a6"></span><span class="k"><span class="pre">typedef</span></span><span class="w"> </span><span class="n"><span class="pre">std</span></span><span class="p"><span class="pre">::</span></span><span class="n"><span class="pre">function</span></span><span class="p"><span class="pre">&lt;</span></span><span class="kt"><span class="pre">bool</span></span><span class="p"><span class="pre">(</span></span><span class="n"><span class="pre">uint8_t</span></span><span class="w"> </span><span class="n"><span class="pre">dev_addr</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="n"><span class="pre">uint8_t</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">data</span></span><span class="p"><span class="pre">,</span></span><span class="w"> </span><span class="n"><span class="pre">size_t</span></span><span class="w"> </span><span class="n"><span class="pre">data_len</span></span><span class="p"><span class="pre">)</span></span><span class="p"><span class="pre">&gt;</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">read_fn</span></span></span><a class="headerlink" href="#_CPPv4N4espp7Ads1x157read_fnE" title="Permalink to this definition"></a><br /></dt>
 <dd><p>Function to read bytes from the device. </p>
 <dl class="field-list simple">
 <dt class="field-odd">Param dev_addr</dt>
 <dd class="field-odd"><p>Address of the device to write to. </p>
 </dd>
-<dt class="field-even">Param reg_addr</dt>
-<dd class="field-even"><p>Register address to read from. </p>
-</dd>
-<dt class="field-odd">Param data</dt>
-<dd class="field-odd"><p>Pointer to array of bytes to read into. </p>
+<dt class="field-even">Param data</dt>
+<dd class="field-even"><p>Pointer to array of bytes to read into. </p>
 </dd>
-<dt class="field-even">Param data_len</dt>
-<dd class="field-even"><p>Number of data bytes to read. </p>
+<dt class="field-odd">Param data_len</dt>
+<dd class="field-odd"><p>Number of data bytes to read. </p>
 </dd>
-<dt class="field-odd">Return</dt>
-<dd class="field-odd"><p>True if the read was successful. </p>
+<dt class="field-even">Return</dt>
+<dd class="field-even"><p>True if the read was successful. </p>
 </dd>
 </dl>
 </dd></dl>

docs/adc/ads7138.html

@@ -146,7 +146,7 @@
           <li><a href="index.html">ADC APIs</a> &raquo;</li>
       <li>ADS7138 I2C ADC</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/adc/ads7138.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/adc/ads7138.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>
@@ -168,7 +168,7 @@ <h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to
 <section id="header-file">
 <h3>Header File<a class="headerlink" href="#header-file" title="Permalink to this headline"></a></h3>
 <ul class="simple">
-<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/57b5b0c/components/ads7138/include/ads7138.hpp">components/ads7138/include/ads7138.hpp</a></p></li>
+<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/e2d5c8f/components/ads7138/include/ads7138.hpp">components/ads7138/include/ads7138.hpp</a></p></li>
 </ul>
 </section>
 <section id="classes">

docs/adc/continuous_adc.html

@@ -146,7 +146,7 @@
           <li><a href="index.html">ADC APIs</a> &raquo;</li>
       <li>Continuous ADC</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/adc/continuous_adc.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/adc/continuous_adc.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>
@@ -168,7 +168,7 @@ <h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to
 <section id="header-file">
 <h3>Header File<a class="headerlink" href="#header-file" title="Permalink to this headline"></a></h3>
 <ul class="simple">
-<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/57b5b0c/components/adc/include/continuous_adc.hpp">components/adc/include/continuous_adc.hpp</a></p></li>
+<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/e2d5c8f/components/adc/include/continuous_adc.hpp">components/adc/include/continuous_adc.hpp</a></p></li>
 </ul>
 </section>
 <section id="classes">

docs/adc/index.html

@@ -138,7 +138,7 @@
       <li><a href="../index.html" class="icon icon-home"></a> &raquo;</li>
       <li>ADC APIs</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/adc/index.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/adc/index.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>

docs/adc/oneshot_adc.html

@@ -146,7 +146,7 @@
           <li><a href="index.html">ADC APIs</a> &raquo;</li>
       <li>Oneshot ADC</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/adc/oneshot_adc.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/adc/oneshot_adc.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>
@@ -167,7 +167,7 @@ <h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to
 <section id="header-file">
 <h3>Header File<a class="headerlink" href="#header-file" title="Permalink to this headline"></a></h3>
 <ul class="simple">
-<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/57b5b0c/components/adc/include/oneshot_adc.hpp">components/adc/include/oneshot_adc.hpp</a></p></li>
+<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/e2d5c8f/components/adc/include/oneshot_adc.hpp">components/adc/include/oneshot_adc.hpp</a></p></li>
 </ul>
 </section>
 <section id="classes">

docs/adc/tla2528.html

@@ -146,7 +146,7 @@
           <li><a href="index.html">ADC APIs</a> &raquo;</li>
       <li>TLA2528 I2C ADC</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/adc/tla2528.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/adc/tla2528.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>
@@ -168,7 +168,7 @@ <h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to
 <section id="header-file">
 <h3>Header File<a class="headerlink" href="#header-file" title="Permalink to this headline"></a></h3>
 <ul class="simple">
-<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/57b5b0c/components/tla2528/include/tla2528.hpp">components/tla2528/include/tla2528.hpp</a></p></li>
+<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/e2d5c8f/components/tla2528/include/tla2528.hpp">components/tla2528/include/tla2528.hpp</a></p></li>
 </ul>
 </section>
 <section id="classes">

docs/bldc/bldc_driver.html

@@ -142,7 +142,7 @@
           <li><a href="index.html">BLDC APIs</a> &raquo;</li>
       <li>BLDC Driver</li>
       <li class="wy-breadcrumbs-aside">
-              <a href="https://github.com/esp-cpp/espp/blob/57b5b0c/docs/en/bldc/bldc_driver.rst" class="fa fa-github"> Edit on GitHub</a>
+              <a href="https://github.com/esp-cpp/espp/blob/e2d5c8f/docs/en/bldc/bldc_driver.rst" class="fa fa-github"> Edit on GitHub</a>
       </li>
   </ul>
   <hr/>
@@ -159,7 +159,7 @@ <h2>API Reference<a class="headerlink" href="#api-reference" title="Permalink to
 <section id="header-file">
 <h3>Header File<a class="headerlink" href="#header-file" title="Permalink to this headline"></a></h3>
 <ul class="simple">
-<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/57b5b0c/components/bldc_driver/include/bldc_driver.hpp">components/bldc_driver/include/bldc_driver.hpp</a></p></li>
+<li><p><a class="reference external" href="https://github.com/esp-cpp/espp/blob/e2d5c8f/components/bldc_driver/include/bldc_driver.hpp">components/bldc_driver/include/bldc_driver.hpp</a></p></li>
 </ul>
 </section>
 <section id="classes">