Merge pull request #3 from adafruit/bot-driver-implementation

more tests

Author: ladyada

Adafruit_AS7343.cpp

@@ -632,6 +632,11 @@ uint8_t Adafruit_AS7343::getPersistence() {
  * @brief Set which ADC channel is used for threshold interrupts
  * @param channel ADC channel 0-5
  * @return true on success
+ * @note Hardware testing shows this register does NOT affect threshold
+ *       comparison or persistence - comparison is always on CH0 regardless
+ *       of this setting. The datasheet claims SP_TH_CH controls the
+ *       persistence filter channel, but this behavior is not observed.
+ *       Register read/write works correctly; the value just has no effect.
  */
 bool Adafruit_AS7343::setThresholdChannel(uint8_t channel) {
   if (channel > 5)
@@ -653,6 +658,8 @@ bool Adafruit_AS7343::setThresholdChannel(uint8_t channel) {
 /**
  * @brief Get the current threshold channel
  * @return ADC channel 0-5
+ * @note See setThresholdChannel() - this register has no observed effect
+ *       on threshold comparison behavior.
  */
 uint8_t Adafruit_AS7343::getThresholdChannel() {
   setBank(true);

examples/fulltest/fulltest.ino

@@ -133,6 +133,8 @@ void setup() {
   Serial.print(F("Persistence: "));
   Serial.println(as7343.getPersistence());
 
+  // NOTE: Threshold channel register r/w works but has no observed effect
+  // on threshold comparison - comparison is always on CH0 regardless.
   as7343.setThresholdChannel(0);
   Serial.print(F("Threshold Channel: "));
   Serial.println(as7343.getThresholdChannel());