libs

include/sound4calc.h

@@ -18,7 +18,8 @@
 #define	SH7337_PGDR 0xA400012C
 #define	SH7337_SCPDR 0xA4000136
 
-void SwitchPinState();
+void SwitchPinState(char level);
+void PlayNote();
 void InitPorts();
 
 #endif

src/main.c

@@ -9,31 +9,13 @@
 
 unsigned char bincod[25] = {0};
 unsigned char place = 0;
-
-static struct {
-  int freq;
-  int length_ms;
-} seq[] = {
-  	{  352,  500 },
-    {  412,  375 },
-    {  352,  250 },
-    {  352,  125 },
-    {  475,  250 },
-    {  352,  250 },
-    {  316,  250 },
-    {   -1,   -1 },
-  };
-
+unsigned char range = 0;
 
 void lect()
 {
-  static unsigned char range = 0;
-
-    if(bincod[range%place] != bincod[(range+1)%place])
-    {
-      SwitchPinState();
-    }
-    range++;
+  SwitchPinState(bincod[range]=='-');
+  range++;
+  if(!(bincod[range])) range=0;
 }
 
 int main(void)

src/sound4calc.c

@@ -1,18 +1,43 @@
 #include "sound4calc.h"
 #include <mpu.h> // from Gint
+#include <timer.h> //from Gint
 
-void SwitchPinState()
+unsigned char* signal = {"----_____"};
+
+/*
+  SwitchPinState()
+  put the pin at the level
+*/
+void SwitchPinState(char level)
 {
+level = !!level;
+
 if(isSH3())
   {
-  *(volatile unsigned char*)SH7337_SCPDR ^= 0x01;
+  *(volatile unsigned char*)SH7337_SCPDR  = (*(volatile unsigned char*)SH7337_SCPDR & 0xFE) | level ;
   }
 else
   {
-  *(volatile unsigned char*)SH7305_PJDR ^= 0x04;
+  *(volatile unsigned char*)SH7305_PJDR = (*(volatile unsigned char*)SH7305_PJDR & 0xF3) | (0x1<<(2+level));
   }
 }
 
+/*
+  PlayNote()
+  allow to make different waveforms with '-' and '_'
+*/
+void PlayNote()
+{
+static x = 0;
+SwitchPinState(signal[x]=='-');
+x = x + 1;
+if(!(signal[x])) x = 0;
+}
+
+/*
+  InitPorts();
+  Init ports to output
+*/
 void InitPorts()
 {
 if(isSH3())