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-rw-r--r--Sprinter/Configuration.h6
-rw-r--r--Sprinter/Sprinter.pde106
2 files changed, 111 insertions, 1 deletions
diff --git a/Sprinter/Configuration.h b/Sprinter/Configuration.h
index 950387a..be42e0b 100644
--- a/Sprinter/Configuration.h
+++ b/Sprinter/Configuration.h
@@ -50,9 +50,13 @@ const bool Z_ENDSTOP_INVERT = false;
// Comment out (using // at the start of the line) to disable SD support:
#define SDSUPPORT
-
//// ADVANCED SETTINGS - to tweak parameters
+#ifdef SDSUPPORT
+ //Fast transfer chunk size (> 1024 is unstable, change at your own risk).
+ #define SD_FAST_XFER_CHUNK_SIZE 1024
+#endif
+
#include "thermistortables.h"
// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
diff --git a/Sprinter/Sprinter.pde b/Sprinter/Sprinter.pde
index bc8a2ac..1322b30 100644
--- a/Sprinter/Sprinter.pde
+++ b/Sprinter/Sprinter.pde
@@ -167,6 +167,9 @@ unsigned long stepper_inactive_time = 0;
bool sdactive = false;
bool savetosd = false;
int16_t n;
+ char fastxferbuffer[SD_FAST_XFER_CHUNK_SIZE + 1];
+ int lastxferchar;
+ long xferbytes;
void initsd(){
sdactive = false;
@@ -205,6 +208,102 @@ unsigned long stepper_inactive_time = 0;
Serial.println("error writing to file");
}
}
+
+ void fast_xfer()
+ {
+ char *pstr;
+ boolean done = false;
+
+ //force heater pins low
+ if(HEATER_0_PIN > -1) WRITE(HEATER_0_PIN,LOW);
+ if(HEATER_1_PIN > -1) WRITE(HEATER_1_PIN,LOW);
+
+ lastxferchar = 1;
+ xferbytes = 0;
+
+ pstr = strstr(strchr_pointer+4, " ");
+
+ if(pstr == NULL)
+ {
+ Serial.println("invalid command");
+ return;
+ }
+
+ *pstr = '\0';
+
+ //check mode (currently only RAW is supported
+ if(strcmp(strchr_pointer+4, "RAW") != 0)
+ {
+ Serial.println("Invalid transfer codec");
+ return;
+ }else{
+ Serial.print("Selected codec: ");
+ Serial.println(strchr_pointer+4);
+ }
+
+ if (!file.open(&root, pstr+1, O_CREAT | O_APPEND | O_WRITE | O_TRUNC))
+ {
+ Serial.print("open failed, File: ");
+ Serial.print(pstr+1);
+ Serial.print(".");
+ }else{
+ Serial.print("Writing to file: ");
+ Serial.println(pstr+1);
+ }
+
+ Serial.println("ok");
+
+ //RAW transfer codec
+ //Host sends \0 then up to SD_FAST_XFER_CHUNK_SIZE then \0
+ //when host is done, it sends \0\0.
+ //if a non \0 character is recieved at the beginning, host has failed somehow, kill the transfer.
+
+ //read SD_FAST_XFER_CHUNK_SIZE bytes (or until \0 is recieved)
+ while(!done)
+ {
+ while(!Serial.available())
+ {
+ }
+ if(Serial.peek() != 0)
+ {
+ //host has failed, this isn't a RAW chunk, it's an actual command
+ file.sync();
+ file.close();
+ return;
+ }
+ //clear the initial 0
+ Serial.read();
+ for(int i=0;i<SD_FAST_XFER_CHUNK_SIZE+1;i++)
+ {
+ while(!Serial.available())
+ {
+ }
+ lastxferchar = Serial.read();
+ //buffer the data...
+ fastxferbuffer[i] = lastxferchar;
+
+ xferbytes++;
+
+ if(lastxferchar == 0)
+ break;
+ }
+
+ if(fastxferbuffer[0] != 0)
+ {
+ fastxferbuffer[SD_FAST_XFER_CHUNK_SIZE] = 0;
+ file.write(fastxferbuffer);
+ Serial.println("ok");
+ }else{
+ Serial.print("Wrote ");
+ Serial.print(xferbytes);
+ Serial.println(" bytes.");
+ done = true;
+ }
+ }
+
+ file.sync();
+ file.close();
+ }
#endif
@@ -750,6 +849,13 @@ inline void process_commands()
//processed in write to file routine above
//savetosd = false;
break;
+ case 30: //M30 - fast SD transfer
+ fast_xfer();
+ break;
+ case 31: //M31 - high speed xfer capabilities
+ Serial.print("RAW:");
+ Serial.println(SD_FAST_XFER_CHUNK_SIZE);
+ break;
#endif
case 42: //M42 -Change pin status via gcode
if (code_seen('S'))