Improved SAMD support. Release 1.3.1.

README.md

@@ -120,6 +120,7 @@ The 8 kHz interrupt handling requires **8 
 # Revision History
 ### Version 1.3.1
 - Updated _1_Voltmeter example and renamed example names.
+- Improved SAMD support.
 
 ### Version 1.3.0
 - Removed blocking wait for ATmega32U4 Serial in examples.

library.properties

@@ -3,7 +3,7 @@ version=1.3.1
 author=Peter Knight, Armin Joachimsmeyer
 maintainer=Armin Joachimsmeyer <[email protected]>
 sentence=Speech library for Arduino. Generates speech from a fixed vocabulary encoded with LPC.
-paragraph=Talkie comes with over 1000 words of speech data that can be included in your projects. It is a software implementation of the Texas Instruments speech synthesis architecture (Linear Predictive Coding) from the late 1970s / early 1980s.  The voice is familiar from Texas Instruments Speak & Spell family of educational products.<br/>Copyright 2011 Peter Knight.<br/>This library is a reworked version which includes <b>8 MHz operation and non blocking capabilities</b> as well as a few utilities.<br/>The code for the queued non blocking version is based on the fork of Paul Stoffregen. https://github.com/PaulStoffregen/Talkie<br/><br/><b>New: </b>Renamed examples.<br/>
+paragraph=Talkie comes with over 1000 words of speech data that can be included in your projects. It is a software implementation of the Texas Instruments speech synthesis architecture (Linear Predictive Coding) from the late 1970s / early 1980s.  The voice is familiar from Texas Instruments Speak & Spell family of educational products.<br/>Copyright 2011 Peter Knight.<br/>This library is a reworked version which includes <b>8 MHz operation and non blocking capabilities</b> as well as a few utilities.<br/>The code for the queued non blocking version is based on the fork of Paul Stoffregen. https://github.com/PaulStoffregen/Talkie<br/><br/><b>New: </b>Improved SAMD support. Renamed examples.<br/>
 category=Signal Input/Output
 url=https://github.com/ArminJo/Talkie
 architectures=avr,megaavr,samd,esp32,stm32,STM32F1

src/Talkie.cpp

@@ -27,8 +27,8 @@
  *
  *     C to avoid clicks  Low pass 1600 Hz  DC decoupling (optional)
  *                      _____
- *  D3 >------||-------| 10k |---+-----------||-------> to Power amplifier
- *           100nF      -----    |          10nF
+ *  D3 >------||-------|_____|---+-----------||-------> to Power amplifier
+ *           100nF       10k     |          10nF
  *                              ---
  *                              --- 10 nF
  *                               |
@@ -44,7 +44,7 @@
  * Leonardo     9/PB5       10/PB6      1           4
  * ProMicro     5/PC6       %           1           4 - or Adafruit Circuit Playground Classic
  * Esplora      6/PD7       %           1           4
- * Zero (SAMD)  A0          %           TC5         DAC0
+ * Zero (SAMD)  A0          %           TC5         A0/DAC0
  * ESP32        25          %           hw_timer_t  DAC0
  * BluePill     3           %           timer3      analogWrite Roger Clarks core
  * BluePill     PA3         %           timer4      analogWrite STM core
@@ -278,7 +278,11 @@ void Talkie::initializeHardware() {
 
 #elif defined(ARDUINO_ARCH_SAMD) // Zero
 #define _10_BIT_OUTPUT // 10-bit, 350 ksps Digital-to-Analog Converter (DAC)
-#define DAC_PIN DAC0   // pin 14/A0 for Zero. PA02 + DAC1 on due
+#if defined DAC0
+#define DAC_PIN DAC0   // pin 14/A0 for Zero. PA02 + DAC1 on DUE
+#else
+#define DAC_PIN A0   // On some SAMD boards DAC0 definition is missing
+#endif
 #define PWM_OUTPUT_FUNCTION(nextPwm) analogWrite(sPointerToTalkieForISR->NonInvertedOutputPin, nextPwm)
 #  ifdef ARDUINO_SAMD_CIRCUITPLAYGROUND_EXPRESS
     static const int CPLAY_SPEAKER_SHUTDOWN= 11;

src/Talkie.h

@@ -108,8 +108,13 @@ class Talkie {
 };
 
 /*
- * Version 1.2.1
- * - Removed blocking wait for ATmega32U4 Serial in examples.
+ * Version 1.3.1
+ * - Improved SAMD support.
+ *
+ * Version 1.3.0
+ * - 10 bit Coefficients are working now, but they do not sound better :-(.
+ * - Tested on an ESP32.
+ * - Tested on a BluePill.
  *
  * Version 1.2.0 - 8/2020
  * - Corrected wrong function name doNotUseUseInvertedOutput().