put flash functions in separate files

1 files changed, 45 insertions, 0 deletions

diff --git a/flash.c b/flash.c
new file mode 100644
index 0000000..28dd42a
--- /dev/null
+++ b/flash.c
@@ -0,0 +1,45 @@
+#include "globals.h"
+
+int readUserBlock(FlashStruct *mem)
+{
+	// read the flash.copy file into the globals.Flash struct
+	// and return the number of bytes read in
+
+	// if the file does not exist, then "return 0";
+	return 0;
+}
+
+void writeUserBlock(FlashStruct *mem, int addr, int numbytes)
+{
+	// check if flash.copy file exists
+	// - if it does, update the requested address and
+	//   number of bytes
+
+	// - if does not, create the file and
+	//   set addr = 0, numbytes = sizeof (mem)
+	//   so that entire struct will be written,
+	//   instead of just the requested range
+
+	// All writing should be done in a super-safe 
+	// way. Non-corruption, even during a power-off transient,
+	// is the priority here. We do not want instruments
+	// losing configuration data ever, because that
+	// means expensive repairs.
+}
+
+void initFlash(FlashStruct *mem)
+{
+	if (readUserBlock(mem) > 0) return;
+
+	// uninitialized device!
+	mem->flash_start = (char) 99;
+	strcpy(mem->aux_error_message,"FIXME");
+	mem->channels = (short) 1;
+	mem->enable_avrq_extra_ampls = (char) 12;
+	mem->ChanKey_frequency = (char) 0;
+
+	// save the default Flash config, for nonvolatile persistence
+	writeUserBlock(mem, 0, sizeof(mem));
+}
+
+