Can't get waveform from buffer on a R4 Minima

[Grumpy_Mike]

I am trying to get a waveform from constructor 2 using the analogWave.h library. It compiles but produces nothing. Can anyone spot where I am going wrong please. This is the code:-

/*
 * Generate a saw tooth wave fixed frequency from a buffer
 * Wave output on A0
 */
#include "analogWave.h"

const int bufferSize = 256 ;
int offset = 0;
uint16_t waveBuffer[bufferSize];

analogWave wave(DAC, waveBuffer, bufferSize, offset);

int freq = 20000;  // in hertz, change accordingly
int dt = 3000;

void setup() {
  Serial.begin(115200);
  //while(!Serial) delay(200);
  delay(6000);
  Serial.println("Sample Rate is " + String(freq) + " hz");
  setUpBuffer();
  Serial.print("number of samples ");
  Serial.println(wave.num_of_sample());
  wave.amplitude(0.5);
  wave.begin(freq);
  wave.start();
}

void setUpBuffer(){
  for(int i = 0; i<256; i++){
    waveBuffer[i] = i << 1;
    Serial.println(i << 1);
  }
}

void loop() { 

}

This is the compiler output when uploading the code:-

/Applications/Arduino.app/Contents/Java/arduino-builder -dump-prefs -logger=machine -hardware /Applications/Arduino.app/Contents/Java/hardware -hardware /Users/mikecook/Library/Arduino15/packages -hardware /Users/mikecook/Documents/Arduino/hardware -tools /Applications/Arduino.app/Contents/Java/tools-builder -tools /Applications/Arduino.app/Contents/Java/hardware/tools/avr -tools /Users/mikecook/Library/Arduino15/packages -built-in-libraries /Applications/Arduino.app/Contents/Java/libraries -libraries /Users/mikecook/Documents/Arduino/libraries -fqbn=arduino:renesas_uno:minima -ide-version=10819 -build-path /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898 -warnings=none -build-cache /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_cache_575112 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.dfu-util.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.dfu-util-0.11.0-arduino5.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.bossac.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/bossac/1.9.1-arduino5 -prefs=runtime.tools.bossac-1.9.1-arduino5.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/bossac/1.9.1-arduino5 -prefs=runtime.tools.openocd.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/openocd/0.11.0-arduino2 -prefs=runtime.tools.openocd-0.11.0-arduino2.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/openocd/0.11.0-arduino2 -prefs=runtime.tools.arm-none-eabi-gcc.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4 -prefs=runtime.tools.arm-none-eabi-gcc-7-2017q4.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4 -verbose /Users/mikecook/Documents/Arduino/A4 Code & Notes/waveOutput/waveOutput.ino
/Applications/Arduino.app/Contents/Java/arduino-builder -compile -logger=machine -hardware /Applications/Arduino.app/Contents/Java/hardware -hardware /Users/mikecook/Library/Arduino15/packages -hardware /Users/mikecook/Documents/Arduino/hardware -tools /Applications/Arduino.app/Contents/Java/tools-builder -tools /Applications/Arduino.app/Contents/Java/hardware/tools/avr -tools /Users/mikecook/Library/Arduino15/packages -built-in-libraries /Applications/Arduino.app/Contents/Java/libraries -libraries /Users/mikecook/Documents/Arduino/libraries -fqbn=arduino:renesas_uno:minima -ide-version=10819 -build-path /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898 -warnings=none -build-cache /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_cache_575112 -prefs=build.warn_data_percentage=75 -prefs=runtime.tools.dfu-util.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.dfu-util-0.11.0-arduino5.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5 -prefs=runtime.tools.bossac.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/bossac/1.9.1-arduino5 -prefs=runtime.tools.bossac-1.9.1-arduino5.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/bossac/1.9.1-arduino5 -prefs=runtime.tools.openocd.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/openocd/0.11.0-arduino2 -prefs=runtime.tools.openocd-0.11.0-arduino2.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/openocd/0.11.0-arduino2 -prefs=runtime.tools.arm-none-eabi-gcc.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4 -prefs=runtime.tools.arm-none-eabi-gcc-7-2017q4.path=/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4 -verbose /Users/mikecook/Documents/Arduino/A4 Code & Notes/waveOutput/waveOutput.ino
Using board 'minima' from platform in folder: /Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2
Using core 'arduino' from platform in folder: /Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2
Detecting libraries used...
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-g++ -c -w -Os -g3 -fno-use-cxa-atexit -fno-rtti -fno-exceptions -nostdlib -DF_CPU=48000000 -DARDUINO_UNOR4_MINIMA -std=gnu++17 -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsigned-char -ffunction-sections -fdata-sections -fmessage-length=0 -fno-builtin -w -x c++ -E -CC -DARDUINO=10819 "-DPROJECT_NAME=\"/var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino\"" -DARDUINO_MINIMA -DARDUINO_ARCH_RENESAS_UNO -DARDUINO_ARCH_RENESAS -DARDUINO_FSP -D_XOPEN_SOURCE -mthumb @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/defines.txt -DCFG_TUSB_MCU=OPT_MCU_RAXXX -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/tinyusb -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated-avr-comp -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA -iprefix/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2 @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/includes.txt /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/sketch/waveOutput.ino.cpp -o /dev/null
Alternatives for analogWave.h: [AnalogWave]
ResolveLibrary(analogWave.h)
  -> candidates: [AnalogWave]
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-g++ -c -w -Os -g3 -fno-use-cxa-atexit -fno-rtti -fno-exceptions -nostdlib -DF_CPU=48000000 -DARDUINO_UNOR4_MINIMA -std=gnu++17 -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsigned-char -ffunction-sections -fdata-sections -fmessage-length=0 -fno-builtin -w -x c++ -E -CC -DARDUINO=10819 "-DPROJECT_NAME=\"/var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino\"" -DARDUINO_MINIMA -DARDUINO_ARCH_RENESAS_UNO -DARDUINO_ARCH_RENESAS -DARDUINO_FSP -D_XOPEN_SOURCE -mthumb @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/defines.txt -DCFG_TUSB_MCU=OPT_MCU_RAXXX -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/tinyusb -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated-avr-comp -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/libraries/AnalogWave -iprefix/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2 @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/includes.txt /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/sketch/waveOutput.ino.cpp -o /dev/null
Using cached library dependencies for file: /Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/libraries/AnalogWave/analogWave.cpp
Generating function prototypes...
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-g++ -c -w -Os -g3 -fno-use-cxa-atexit -fno-rtti -fno-exceptions -nostdlib -DF_CPU=48000000 -DARDUINO_UNOR4_MINIMA -std=gnu++17 -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsigned-char -ffunction-sections -fdata-sections -fmessage-length=0 -fno-builtin -w -x c++ -E -CC -DARDUINO=10819 "-DPROJECT_NAME=\"/var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino\"" -DARDUINO_MINIMA -DARDUINO_ARCH_RENESAS_UNO -DARDUINO_ARCH_RENESAS -DARDUINO_FSP -D_XOPEN_SOURCE -mthumb @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/defines.txt -DCFG_TUSB_MCU=OPT_MCU_RAXXX -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/tinyusb -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated-avr-comp -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/libraries/AnalogWave -iprefix/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2 @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/includes.txt /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/sketch/waveOutput.ino.cpp -o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/preproc/ctags_target_for_gcc_minus_e.cpp
/Applications/Arduino.app/Contents/Java/tools-builder/ctags/5.8-arduino11/ctags -u --language-force=c++ -f - --c++-kinds=svpf --fields=KSTtzns --line-directives /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/preproc/ctags_target_for_gcc_minus_e.cpp
Compiling sketch...
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-g++ -c -w -Os -g3 -fno-use-cxa-atexit -fno-rtti -fno-exceptions -MMD -nostdlib -DF_CPU=48000000 -DARDUINO_UNOR4_MINIMA -MMD -std=gnu++17 -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -fsigned-char -ffunction-sections -fdata-sections -fmessage-length=0 -fno-builtin -DARDUINO=10819 "-DPROJECT_NAME=\"/var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino\"" -DARDUINO_MINIMA -DARDUINO_ARCH_RENESAS_UNO -DARDUINO_ARCH_RENESAS -DARDUINO_FSP -D_XOPEN_SOURCE -mthumb @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/defines.txt -DCFG_TUSB_MCU=OPT_MCU_RAXXX -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/tinyusb -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino/api/deprecated-avr-comp -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/cores/arduino -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA -I/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/libraries/AnalogWave -iprefix/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2 @/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/includes.txt /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/sketch/waveOutput.ino.cpp -o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/sketch/waveOutput.ino.cpp.o
Compiling libraries...
Compiling library "AnalogWave"
Using previously compiled file: /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/libraries/AnalogWave/analogWave.cpp.o
Compiling core...
Using previously compiled file: /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/tmp_gen_c_files/common_data.c.o
Using previously compiled file: /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/tmp_gen_c_files/pin_data.c.o
Using previously compiled file: /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/tmp_gen_c_files/main.c.o
Using previously compiled file: /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/variant.cpp.o
Using precompiled core: /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_cache_575112/core/core_arduino_renesas_uno_minima_9d17dc0b4652cac08cf8eba6c469c378.a
Linking everything together...
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-g++ -Wl,--gc-sections --specs=nosys.specs -w -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.elf -L/var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898 -L/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA -T/Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/fsp.ld /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/sketch/waveOutput.ino.cpp.o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/libraries/AnalogWave/analogWave.cpp.o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/tmp_gen_c_files/common_data.c.o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/tmp_gen_c_files/main.c.o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/tmp_gen_c_files/pin_data.c.o /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/core/variant.cpp.o -Wl,--start-group /Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/variants/MINIMA/libs/libfsp.a /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/../arduino_cache_575112/core/core_arduino_renesas_uno_minima_9d17dc0b4652cac08cf8eba6c469c378.a --specs=nano.specs -lstdc++ -lsupc++ -lm -lc -lgcc -lnosys -Wl,--end-group -Wl,-Map,/var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.map
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-objcopy -O binary -j .text -j .data /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.elf /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.bin
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-objcopy -O ihex -j .text -j .data /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.elf /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.hex
Using library AnalogWave in folder: /Users/mikecook/Library/Arduino15/packages/arduino/hardware/renesas_uno/1.0.2/libraries/AnalogWave (legacy)
/Users/mikecook/Library/Arduino15/packages/arduino/tools/arm-none-eabi-gcc/7-2017q4/bin/arm-none-eabi-size -A /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.elf
Sketch uses 41584 bytes (15%) of program storage space. Maximum is 262144 bytes.
Global variables use 3200 bytes (9%) of dynamic memory, leaving 29568 bytes for local variables. Maximum is 32768 bytes.
/Users/mikecook/Library/Arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5/dfu-util --device 0x2341:0x0069,:0x0369 -D /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.bin -a0 -Q 
dfu-util 0.11-arduino4

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

Opening DFU capable USB device...
Device ID 2341:0369
Device DFU version 0101
Claiming USB DFU Interface...
Setting Alternate Interface #0 ...
Determining device status...
DFU state(2) = dfuIDLE, status(0) = No error condition is present
DFU mode device DFU version 0101
Device returned transfer size 64
Copying data from PC to DFU device
Download	[=========================] 100%        41584 bytes
Download done.
DFU state(7) = dfuMANIFEST, status(0) = No error condition is present
DFU state(2) = dfuIDLE, status(0) = No error condition is present
Done!

and this is the output from the serial print:-

16:23:55.815 -> Sample Rate is 20000 hz
16:23:55.815 -> 0
16:23:55.815 -> 2
16:23:55.815 -> 4
16:23:55.815 -> 6
16:23:55.815 -> 8
16:23:55.815 -> 10
16:23:55.815 -> 12
16:23:55.815 -> 14
16:23:55.815 -> 16
16:23:55.815 -> 18
16:23:55.815 -> 20
16:23:55.815 -> 22
16:23:55.815 -> 24
16:23:55.815 -> 26
16:23:55.815 -> 28
16:23:55.815 -> 30
16:23:55.815 -> 32
16:23:55.815 -> 34
16:23:55.815 -> 36
16:23:55.815 -> 38
16:23:55.815 -> 40
16:23:55.815 -> 42
16:23:55.815 -> 44
16:23:55.815 -> 46
16:23:55.815 -> 48
16:23:55.815 -> 50
16:23:55.815 -> 52
16:23:55.815 -> 54
16:23:55.815 -> 56
16:23:55.815 -> 58
16:23:55.815 -> 60
16:23:55.815 -> 62
16:23:55.815 -> 64
16:23:55.815 -> 66
16:23:55.815 -> 68
16:23:55.815 -> 70
16:23:55.815 -> 72
16:23:55.815 -> 74
16:23:55.815 -> 76
16:23:55.815 -> 78
16:23:55.815 -> 80
16:23:55.815 -> 82
16:23:55.815 -> 84
16:23:55.815 -> 86
16:23:55.815 -> 88
16:23:55.815 -> 90
16:23:55.815 -> 92
16:23:55.815 -> 94
16:23:55.815 -> 96
16:23:55.815 -> 98
16:23:55.815 -> 100
16:23:55.815 -> 102
16:23:55.815 -> 104
16:23:55.815 -> 106
16:23:55.815 -> 108
16:23:55.815 -> 110
16:23:55.815 -> 112
16:23:55.815 -> 114
16:23:55.815 -> 116
16:23:55.815 -> 118
16:23:55.815 -> 120
16:23:55.815 -> 122
16:23:55.815 -> 124
16:23:55.815 -> 126
16:23:55.815 -> 128
16:23:55.815 -> 130
16:23:55.815 -> 132
16:23:55.815 -> 134
16:23:55.815 -> 136
16:23:55.815 -> 138
16:23:55.815 -> 140
16:23:55.815 -> 142
16:23:55.815 -> 144
16:23:55.815 -> 146
16:23:55.815 -> 148
16:23:55.815 -> 150
16:23:55.815 -> 152
16:23:55.815 -> 154
16:23:55.815 -> 156
16:23:55.815 -> 158
16:23:55.815 -> 160
16:23:55.815 -> 162
16:23:55.815 -> 164
16:23:55.815 -> 166
16:23:55.815 -> 168
16:23:55.815 -> 170
16:23:55.815 -> 172
16:23:55.815 -> 174
16:23:55.815 -> 176
16:23:55.815 -> 178
16:23:55.815 -> 180
16:23:55.815 -> 182
16:23:55.815 -> 184
16:23:55.815 -> 186
16:23:55.815 -> 188
16:23:55.815 -> 190
16:23:55.815 -> 192
16:23:55.815 -> 194
16:23:55.815 -> 196
16:23:55.815 -> 198
16:23:55.815 -> 200
16:23:55.815 -> 202
16:23:55.815 -> 204
16:23:55.815 -> 206
16:23:55.815 -> 208
16:23:55.815 -> 210
16:23:55.815 -> 212
16:23:55.848 -> 214
16:23:55.848 -> 216
16:23:55.848 -> 218
16:23:55.848 -> 220
16:23:55.848 -> 222
16:23:55.848 -> 224
16:23:55.848 -> 226
16:23:55.848 -> 228
16:23:55.848 -> 230
16:23:55.848 -> 232
16:23:55.848 -> 234
16:23:55.848 -> 236
16:23:55.848 -> 238
16:23:55.848 -> 240
16:23:55.848 -> 242
16:23:55.848 -> 244
16:23:55.848 -> 246
16:23:55.848 -> 248
16:23:55.848 -> 250
16:23:55.848 -> 252
16:23:55.848 -> 254
16:23:55.848 -> 256
16:23:55.848 -> 258
16:23:55.848 -> 260
16:23:55.848 -> 262
16:23:55.848 -> 264
16:23:55.848 -> 266
16:23:55.848 -> 268
16:23:55.848 -> 270
16:23:55.848 -> 272
16:23:55.848 -> 274
16:23:55.848 -> 276
16:23:55.848 -> 278
16:23:55.848 -> 280
16:23:55.848 -> 282
16:23:55.848 -> 284
16:23:55.848 -> 286
16:23:55.848 -> 288
16:23:55.848 -> 290
16:23:55.848 -> 292
16:23:55.848 -> 294
16:23:55.848 -> 296
16:23:55.848 -> 298
16:23:55.848 -> 300
16:23:55.848 -> 302
16:23:55.848 -> 304
16:23:55.848 -> 306
16:23:55.848 -> 308
16:23:55.848 -> 310
16:23:55.848 -> 312
16:23:55.848 -> 314
16:23:55.848 -> 316
16:23:55.848 -> 318
16:23:55.848 -> 320
16:23:55.848 -> 322
16:23:55.848 -> 324
16:23:55.848 -> 326
16:23:55.848 -> 328
16:23:55.848 -> 330
16:23:55.848 -> 332
16:23:55.848 -> 334
16:23:55.848 -> 336
16:23:55.848 -> 338
16:23:55.848 -> 340
16:23:55.848 -> 342
16:23:55.848 -> 344
16:23:55.848 -> 346
16:23:55.848 -> 348
16:23:55.848 -> 350
16:23:55.848 -> 352
16:23:55.848 -> 354
16:23:55.848 -> 356
16:23:55.848 -> 358
16:23:55.848 -> 360
16:23:55.848 -> 362
16:23:55.848 -> 364
16:23:55.848 -> 366
16:23:55.848 -> 368
16:23:55.848 -> 370
16:23:55.848 -> 372
16:23:55.848 -> 374
16:23:55.848 -> 376
16:23:55.848 -> 378
16:23:55.848 -> 380
16:23:55.848 -> 382
16:23:55.848 -> 384
16:23:55.848 -> 386
16:23:55.848 -> 388
16:23:55.848 -> 390
16:23:55.848 -> 392
16:23:55.848 -> 394
16:23:55.848 -> 396
16:23:55.848 -> 398
16:23:55.848 -> 400
16:23:55.848 -> 402
16:23:55.848 -> 404
16:23:55.848 -> 406
16:23:55.848 -> 408
16:23:55.848 -> 410
16:23:55.848 -> 412
16:23:55.848 -> 414
16:23:55.848 -> 416
16:23:55.848 -> 418
16:23:55.848 -> 420
16:23:55.848 -> 422
16:23:55.848 -> 424
16:23:55.848 -> 426
16:23:55.848 -> 428
16:23:55.848 -> 430
16:23:55.848 -> 432
16:23:55.848 -> 434
16:23:55.848 -> 436
16:23:55.848 -> 438
16:23:55.848 -> 440
16:23:55.848 -> 442
16:23:55.848 -> 444
16:23:55.848 -> 446
16:23:55.848 -> 448
16:23:55.848 -> 450
16:23:55.848 -> 452
16:23:55.848 -> 454
16:23:55.848 -> 456
16:23:55.848 -> 458
16:23:55.848 -> 460
16:23:55.848 -> 462
16:23:55.848 -> 464
16:23:55.848 -> 466
16:23:55.848 -> 468
16:23:55.848 -> 470
16:23:55.848 -> 472
16:23:55.848 -> 474
16:23:55.848 -> 476
16:23:55.848 -> 478
16:23:55.848 -> 480
16:23:55.848 -> 482
16:23:55.848 -> 484
16:23:55.848 -> 486
16:23:55.848 -> 488
16:23:55.848 -> 490
16:23:55.848 -> 492
16:23:55.848 -> 494
16:23:55.848 -> 496
16:23:55.848 -> 498
16:23:55.848 -> 500
16:23:55.848 -> 502
16:23:55.848 -> 504
16:23:55.848 -> 506
16:23:55.848 -> 508
16:23:55.848 -> 510
16:23:55.848 -> number of samples 256

Thanks for looking.

[Grumpy_Mike]

Can anyone tell if I am making a mistake in calling constructor 2?

 /* constructor 2 with buffer to be used (sample in buffer are output cyclically */
  analogWave(pin_size_t pinNumber, uint16_t *_buffer, uint32_t _size, uint32_t _offset);

Here is the full header file.

#ifndef ARDUINO_ANALOG_WAVE
#define ARDUINO_ANALOG_WAVE

#include "FspTimer.h"
#include "r_dtc.h"

#define SAMPLES_FOR_PREDEFINED_WAVE 24
#define WAVE_PRIORITY  1

class analogWave {
private:
  FspTimer timer;
  volatile uint32_t pin;
  uint16_t *buffer;

  uint8_t dac_bits;
  uint8_t *samples8;
  uint16_t *samples16;
  uint32_t size;
  volatile uint32_t index;
  volatile float _amplitude;
  volatile uint32_t _offset;

  double freq_max;
  double dac_max_samp_rate;

  dtc_instance_ctrl_t dtc_ctrl;
  transfer_info_t dtc_info;
  dtc_extended_cfg_t dtc_cfg_extend;
  transfer_cfg_t dtc_cfg;

  void init(pin_size_t p);
  /* update the output with the next sample value */
  bool update();

public:
  /* constructor 1 with only DAC pin (to be used when predefined waveform are used) */
  analogWave(pin_size_t pinNumber);
  /* constructor 2 with buffer to be used (sample in buffer are output ciclycally */
  analogWave(pin_size_t pinNumber, uint16_t *_buffer, uint32_t _size, uint32_t _offset);
  
  /* begin the output of the waweform the frequency is the one the complete
     set on sample are output (all samples will be output in 1 period */
  bool begin(float freq_hz);
  /* updated the frequency used */
  bool freq(float freq_hz);
  /* make the current index in the buffer to "jump" of the specified quantity */
  void offset(uint32_t o);
  /* start the generation of sample */
  void start();
  /* stop the genration of sample */
  void stop();
  /* every sample is multiplied for this factor must be a value between 0 and 1 */
  void amplitude(float amplitude);
  /* get the number of sample used */
  uint32_t num_of_sample();

  void _pre_sync();

  void sync(analogWave &w);

  void sine(float freq_hz);
  void square(float freq_hz);
  void saw(float freq_hz);
};

#endif

[KurtE]

Sorry, never have tried using that library. So can only throw darts.

If I look at some of their built-in sequences code, like:

void analogWave::sine(float freq_hz) {

  buffer = (uint16_t *)_sinewave.data();
  size = _sinewave.size();
  index = 0;
  begin(freq_hz);
}

These functions don't call start() directly.
Have you tried it without that?
Have you tried it without calling amplitude?

Again, only throwing darts

[Grumpy_Mike]

Thanks for your interest and dart throwing.

@KurtE

These functions don't call start() directly.
Have you tried it without that?
Have you tried it without calling amplitude?

Yes. All combinations.
I think the code sample you showed is only for produce a waveform from the type 1 constructor, like used in the examples on the processor's information page.
An interesting point is that many times I make any attempt to produce a wave from a buffer, then I need a double click on the reset button, to make my next attempt run, otherwise it bombs out with a

/Users/mikecook/Library/Arduino15/packages/arduino/tools/dfu-util/0.11.0-arduino5/dfu-util --device 0x2341:0x0069,:0x0369 -D /var/folders/nw/8ftfyrz54555t_cm5m55kkyr0000gn/T/arduino_build_290898/waveOutput.ino.bin -a0 -Q 
dfu-util 0.11-arduino4

Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc.
Copyright 2010-2021 Tormod Volden and Stefan Schmidt
This program is Free Software and has ABSOLUTELY NO WARRANTY
Please report bugs to http://sourceforge.net/p/dfu-util/tickets/

dfu-util: Failed to retrieve language identifiers
dfu-util: Failed to retrieve language identifiers
Opening DFU capable USB device...
Device ID 2341:0069
Run-Time device DFU version 0101
Claiming USB DFU (Run-Time) Interface...
Setting Alternate Interface zero...
dfu-util: Cannot set alternate interface zero: LIBUSB_ERROR_TIMEOUT
dfu-util: Cannot set alternate interface zero: LIBUSB_ERROR_TIMEOUT

But this is not consistent by any means.

Also after the code is loaded I sometimes get an error opening the serial port.

Download	[=========================] 100%        41432 bytes
Download done.
DFU state(7) = dfuMANIFEST, status(0) = No error condition is present
DFU state(2) = dfuIDLE, status(0) = No error condition is present
Done!
processing.app.SerialException: Error opening serial port '/dev/cu.usbmodem14201'.
	at processing.app.Serial.<init>(Serial.java:152)
	at processing.app.Serial.<init>(Serial.java:82)
	at processing.app.SerialMonitor$2.<init>(SerialMonitor.java:132)
	at processing.app.SerialMonitor.open(SerialMonitor.java:132)
	at processing.app.AbstractMonitor.resume(AbstractMonitor.java:132)
	at processing.app.Editor.resumeOrCloseSerialMonitor(Editor.java:2126)
	at processing.app.Editor.access$1300(Editor.java:116)
	at processing.app.Editor$UploadHandler.run(Editor.java:2095)
	at java.lang.Thread.run(Thread.java:748)
Caused by: jssc.SerialPortException: Port name - /dev/cu.usbmodem14201; Method name - openPort(); Exception type - Port not found.
	at jssc.SerialPort.openPort(SerialPort.java:167)
	at processing.app.Serial.<init>(Serial.java:141)
	... 8 more
Error opening serial port '/dev/cu.usbmodem14201'.

It could be I am producing something that is wiping some settings or other variables.
I have found that a

@Grumpy_Mike

int freq = 20000;

Stops even the type 1 constructor working and I have to reduce this to 10000 before it will work. Currently I have it down to 1000.

I am not understanding this machine like I would like to.

[KurtE]

I cut your code down to 20 and I changed your function:

void setUpBuffer(){
  for(int i = 0; i<256; i++){
    waveBuffer[i] = i * 256;
    Serial.println(waveBuffer[i]);
  }
}

figured it is a unt16_t so tried to run it up to near 65536. and I see:

So guessing it is actually running at 20256 outputs per second. So 20000256 would probably exceed capabilities.

[Grumpy_Mike]

Bullseye! Thanks a lot.

I thought they were going about it the wrong way to make a proper synthesizer.