Automatically create snes_clk.txt if it doesn't exist

Cart_Reader/N64.ino

@@ -428,17 +428,7 @@ void setup_N64_Cart() {
 #ifdef clockgen_installed
   // Adafruit Clock Generator
 
-#ifdef clockgen_calibration
+  initializeClockOffset();
-  int32_t clock_offset = readClockOffset();
-  if (clock_offset > INT32_MIN) {
-    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, clock_offset);
-  } else {
-    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
-  }
-#else
-  // last number is the clock correction factor which is custom for each clock generator
-  i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
-#endif
 
   if (!i2c_found) {
     display_Clear();

Cart_Reader/NP.ino

@@ -606,16 +606,7 @@ void setup_SFM() {
   //PORTH &= ~(1 << 1);
 
   // Adafruit Clock Generator
-#ifdef clockgen_calibration
+  initializeClockOffset();
-  int32_t clock_offset = readClockOffset();
-  if (clock_offset > INT32_MIN) {
-    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, clock_offset);
-  } else {
-    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
-  }
-#else
-  i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
-#endif
 
   if (i2c_found) {
     clockgen.set_pll(SI5351_PLL_FIXED, SI5351_PLLA);

Cart_Reader/SNES.ino

@@ -458,17 +458,7 @@ void setup_Snes() {
   //PORTJ &= ~(1 << 0);
 
   // Adafruit Clock Generator
-#ifdef clockgen_calibration
+  initializeClockOffset();
-  int32_t clock_offset = readClockOffset();
-  if (clock_offset > INT32_MIN) {
-    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, clock_offset);
-  } else {
-    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
-  }
-#else
-  // last number is the clock correction factor which is custom for each clock generator
-  i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
-#endif
 
   if (i2c_found) {
     // Set clocks to 4Mhz/1Mhz for better SA-1 unlocking

Cart_Reader/snes_clk.cpp

@@ -1,6 +1,8 @@
 #include "snes_clk.h"
+#include <si5351.h>
 #include "SdFat.h"
 #include "atoi32.h"
+#include "options.h"
 
 int32_t readClockOffset() {
   FsFile clock_file;
@@ -8,7 +10,7 @@ int32_t readClockOffset() {
   int16_t i;
   int32_t clock_offset;
 
-  if (!clock_file.open("/snes_clk.txt", FILE_READ)) {
+  if (!clock_file.open("/snes_clk.txt", O_READ)) {
     return INT32_MIN;
   }
 
@@ -44,3 +46,25 @@ int32_t readClockOffset() {
 
   return clock_offset;
 }
+
+int32_t initializeClockOffset() {
+#ifdef clockgen_calibration
+  FsFile clock_file;
+  const char zero_char_arr[] = {'0'};
+  int32_t clock_offset = readClockOffset();
+  if (clock_offset > INT32_MIN) {
+    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, clock_offset);
+  } else {
+    i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
+    if(clock_file.open("/snes_clk.txt", O_WRITE | O_CREAT | O_TRUNC)) {
+      clock_file.write(zero_char_arr, 1);
+      clock_file.close();
+    }
+  }
+  return clock_offset;
+#else
+  // last number is the clock correction factor which is custom for each clock generator
+  i2c_found = clockgen.init(SI5351_CRYSTAL_LOAD_8PF, 0, 0);
+  return 0;
+#endif
+}

Cart_Reader/snes_clk.h

@@ -1,7 +1,14 @@
 #ifndef _SNES_CLK_H
 #define _SNES_CLK_H
 
+#include <si5351.h>
 #include "SdFat.h"
 #include "atoi32.h"
+#include "options.h"
+
+extern Si5351 clockgen;
+extern bool i2c_found;
+
 int32_t readClockOffset();
+int32_t initializeClockOffset();
 #endif

sd/snes_clk.txt

@@ -1 +0,0 @@
-0