second chip works, stop mark introduces

sound-driver/sequencer.h

@@ -14,6 +14,7 @@ typedef enum {
   e_L_1_16 = 4,
   e_L_1_32 = 5,
   e_L_LengthEnd = 6,
+  e_L_StopMark = 253,
   e_L_EndMark = 254,
   e_L_SyncMark = 255,
 } t_noteLength;
@@ -33,11 +34,13 @@ typedef enum {
   e_HoldTone, 
   e_StaccatoBreak,
   e_HoldStaccatoBreak,
-  e_SeparateTone 
+  e_SeparateTone,
+  e_Terminate
 } t_sequencerState;
 
 typedef struct {
   uint16_t idx;
+  uint8_t chip;
   uint16_t lengthCnt;
   t_sequencerState state;
   uint8_t amplitude;
@@ -47,6 +50,7 @@ typedef struct {
 #define SEQUENCER_PERIOD 4 // ms
 #define NUM_OF_CHANNELS 3
 typedef struct {
+  uint8_t taskId;
   uint8_t numOfMelodies;
   bool firstRun;
   uint8_t pace; // quarter notes per minute