fix(tla2528): fix use of std::accumulate (#138)

* Properly store result of std::accumulate when configuring tla2528 digital i/o and analog inputs

components/tla2528/include/tla2528.hpp

@@ -587,16 +587,16 @@ class Tla2528 {
     write_one_(Register::OSR_CFG, data, ec);
   }
 
-  static uint8_t bit_pred(uint8_t value, Channel channel) {
+  static uint8_t bit_pred(uint8_t value, const Channel channel) {
     return value | (1 << static_cast<uint8_t>(channel));
   };
 
   void set_pin_configuration(std::error_code &ec) {
     logger_.info("Setting digital mode for outputs {} and inputs {}", digital_outputs_,
                  digital_inputs_);
     uint8_t data = 0;
-    std::accumulate(digital_inputs_.begin(), digital_inputs_.end(), data, bit_pred);
-    std::accumulate(digital_outputs_.begin(), digital_outputs_.end(), data, bit_pred);
+    data = std::accumulate(digital_inputs_.begin(), digital_inputs_.end(), data, bit_pred);
+    data = std::accumulate(digital_outputs_.begin(), digital_outputs_.end(), data, bit_pred);
     // don't have to do anything for analog inputs since they are the default
     // state (0)
     write_one_(Register::PIN_CFG, data, ec);
@@ -605,8 +605,7 @@ class Tla2528 {
   void set_digital_io_direction(std::error_code &ec) {
     logger_.info("Setting digital output for pins {}", digital_outputs_);
     // default direction is input (0)
-    uint8_t data = 0;
-    std::accumulate(digital_outputs_.begin(), digital_outputs_.end(), data, bit_pred);
+    uint8_t data = std::accumulate(digital_outputs_.begin(), digital_outputs_.end(), 0, bit_pred);
     write_one_(Register::GPIO_CFG, data, ec);
   }
 
@@ -615,8 +614,7 @@ class Tla2528 {
     if (mode_ == Mode::AUTO_SEQ) {
       logger_.info("Setting analog inputs for autonomous mode");
       // configure the analog inputs for autonomous conversion sequence
-      uint8_t data = 0;
-      std::accumulate(analog_inputs_.begin(), analog_inputs_.end(), data, bit_pred);
+      uint8_t data = std::accumulate(analog_inputs_.begin(), analog_inputs_.end(), 0, bit_pred);
       write_one_(Register::AUTO_SEQ_CH_SEL, data, ec);
     }
   }