try to sync mp3 player with latest YAHAL

Code/MP3Player/main_task.cpp

@@ -1,5 +1,6 @@
 #include <cstdio>
 #include <cstring>
+#include <cstdlib>
 #include "main_task.h"
 #include "logo50.h"
 #include "icon_enter.h"
@@ -293,7 +294,7 @@ void main_task::menu_start(sd_reader_task&sd_reader,mp3_decoder_task &decoder,pc
     assert(res == FatFs::FR_OK);
     sd_reader.start(&_fs, &_file);
     decoder.reset();
-    decoder.start();
+    decoder.sign_up();
     update_required = 1;
     playing =1;
     last_play_pos = 0;
@@ -310,7 +311,7 @@ void main_task::menu_start_all(sd_reader_task &sd_reader, mp3_decoder_task &deco
     assert(res == FatFs::FR_OK);
     sd_reader.start(&_fs, &_file);
     decoder.reset();
-    decoder.start();
+    decoder.sign_up();
     update_required = 1;
     playing =1;
     last_play_pos = 0;
@@ -515,7 +516,7 @@ void main_task::run() {
     draw_header("Playlist");
     while (true){
         if(playing){
-            if (sd_reader.isAlive() &&  decoder.isAlive()) {
+            if (sd_reader.isLinkedIn() &&  decoder.isLinkedIn()) {
                 //printf("playing now\n");
 
                 if(update_required) {

Code/MP3Player/main_task.h

@@ -81,22 +81,22 @@ public:
     void draw_playing();
     void draw_wrap_text(const char *);
 private:
-    gpio_rp2040_pin _cs;    // CS Line of SD card SPI interface
+    gpio_rp2040     _cs;    // CS Line of SD card SPI interface
     spi_rp2040      _spi;   // SPI interface used for the SD card reader
     sd_spi_drv      _sd;    // SD card low level driver
 
-    gpio_rp2040_pin _next;  // Next button
+    gpio_rp2040     _next;  // Next button
-    gpio_rp2040_pin _part;  // Partition button
+    gpio_rp2040     _part;  // Partition button
-    gpio_rp2040_pin _ps;    // Pico Power save pin
+    gpio_rp2040     _ps;    // Pico Power save pin
 
     FatFs           _fs;
     FatFs::DIR      _dir{};
     FatFs::FILEINFO _finfo{};
     FatFs::FILE     _file{};  // MP3 file on SD
 
-    gpio_rp2040_pin _lcd_rst;
+    gpio_rp2040     _lcd_rst;
-    gpio_rp2040_pin _lcd_dc;
+    gpio_rp2040     _lcd_dc;
-    gpio_rp2040_pin _lcd_cs;
+    gpio_rp2040     _lcd_cs;
     spi_rp2040 _lcd_spi;
     ili9488_drv _lcd;
     uGUI       _gui;

Code/MP3Player/mp3_decoder_task.cpp

@@ -170,6 +170,7 @@ int16_t mp3_decoder_task::scale(mad_fixed_t sample)
     // Therefore rounding and clipping is normally not
     // necessary!
     // round
+#if 0
     sample += (1L << (MAD_F_FRACBITS - 16));
     // clip
     if (sample >= MAD_F_ONE)
@@ -178,8 +179,9 @@ int16_t mp3_decoder_task::scale(mad_fixed_t sample)
         sample = -MAD_F_ONE;
     // Convert to a standard 16 bit PCM value
     // (signed) in the range of -32768...32767
+#endif
     sample >>= (MAD_F_FRACBITS + 1 - 16);
-    return (int16_t)sample;
+    return sample;
 }
 
 uint16_t mp3_decoder_task::get_position(unsigned long fsize, int max_pos) {

Code/MP3Player/mp3_decoder_task.h

@@ -28,7 +28,7 @@ private:
     pcm_audio_interface &   _pcm_if;
     sd_reader_task  &       _sd_reader;
     mad_decoder             _decoder{};
-    gpio_rp2040_pin         _led;
+    gpio_rp2040             _led;
     uint8_t                 _mp3_buf[MP3_BUF_SIZE]{};
     uint32_t                _pcm_rate;
     mad_timer_t             _timer;

Code/MP3Player/pico_mp3_player.cpp

@@ -19,7 +19,7 @@ int main()
     task::sleep_ms(2000);//really neccessary form uart debug
     // Start Main task as privileged task
     main_task Main;
-    Main.start(MAIN_PRIORITY, true);
+    Main.sign_up(core_t::CURRENT_CORE, 50, true);
     // Start the multitasking
     task::start_scheduler();
 }

Code/MP3Player/sd_reader_task.cpp

@@ -19,7 +19,7 @@ void sd_reader_task::start(FatFs * fs, FatFs::FILE * file) {
     _eof       = false;
     _force_eof = false;
     _execute   = false;
-    task::start();
+    task::sign_up();
 }
 
 FatFs::FRESULT sd_reader_task::read_data(uint8_t* buff, uint16_t btr, uint16_t* br) {