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@ -1,20 +1,20 @@
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#define M99_FREE_MEMORY_DUMPER // Comment out to remove Dump sub-command
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#define M99_FREE_MEMORY_CORRUPTOR // Comment out to remove Corrupt sub-command
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#define M100_FREE_MEMORY_DUMPER // Comment out to remove Dump sub-command
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#define M100_FREE_MEMORY_CORRUPTOR // Comment out to remove Corrupt sub-command
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// M99 Free Memory Watcher
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// M100 Free Memory Watcher
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//
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// This code watches the free memory block between the bottom of the heap and the top of the stack.
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// This memory block is initialized and watched via the M99 command.
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// This memory block is initialized and watched via the M100 command.
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//
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// M99 I Initializes the free memory block and prints vitals statistics about the area
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// M99 F Identifies how much of the free memory block remains free and unused. It also
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// M100 I Initializes the free memory block and prints vitals statistics about the area
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// M100 F Identifies how much of the free memory block remains free and unused. It also
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// detects and reports any corruption within the free memory block that may have
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// happened due to errant firmware.
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// M99 D Does a hex display of the free memory block along with a flag for any errant
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// M100 D Does a hex display of the free memory block along with a flag for any errant
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// data that does not match the expected value.
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// M99 C x Corrupts x locations within the free memory block. This is useful to check the
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// correctness of the M99 F and M99 D commands.
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// M100 C x Corrupts x locations within the free memory block. This is useful to check the
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// correctness of the M100 F and M100 D commands.
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//
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// Initial version by Roxy-3DPrintBoard
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//
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@ -23,7 +23,7 @@
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#include "Marlin.h"
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#ifdef M99_FREE_MEMORY_WATCHER
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#ifdef M100_FREE_MEMORY_WATCHER
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extern void *__brkval;
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extern size_t __heap_start, __heap_end, __flp;
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@ -45,7 +45,7 @@ void serial_echopair_P(const char *, long );
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//
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// Utility functions used by M99 to get its work done.
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// Utility functions used by M100 to get its work done.
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//
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unsigned char *top_of_stack();
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@ -57,14 +57,14 @@ int how_many_E5s_are_here( unsigned char *);
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void m99_code()
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void gcode_M100()
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{
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static int m99_not_initialized=1;
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static int m100_not_initialized=1;
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unsigned char *sp, *ptr;
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int i, j, n;
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//
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// M99 D dumps the free memory block from __brkval to the stack pointer.
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// M100 D dumps the free memory block from __brkval to the stack pointer.
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// malloc() eats memory from the start of the block and the stack grows
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// up from the bottom of the block. Solid 0xE5's indicate nothing has
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// used that memory yet. There should not be anything but 0xE5's within
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@ -73,7 +73,7 @@ int i, j, n;
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// the right hand column to help spotting them.
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//
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#ifdef M99_FREE_MEMORY_DUMPER // Comment out to remove Dump sub-command
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#ifdef M100_FREE_MEMORY_DUMPER // Comment out to remove Dump sub-command
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if ( code_seen('D') ) {
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ptr = (unsigned char *) __brkval;
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@ -123,7 +123,7 @@ int i, j, n;
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#endif
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//
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// M99 F requests the code to return the number of free bytes in the memory pool along with
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// M100 F requests the code to return the number of free bytes in the memory pool along with
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// other vital statistics that define the memory pool.
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//
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if ( code_seen('F') ) {
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@ -160,10 +160,10 @@ int i, j, n;
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return;
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}
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//
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// M99 C x Corrupts x locations in the free memory pool and reports the locations of the corruption.
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// This is useful to check the correctness of the M99 D and the M99 F commands.
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// M100 C x Corrupts x locations in the free memory pool and reports the locations of the corruption.
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// This is useful to check the correctness of the M100 D and the M100 F commands.
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//
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#ifdef M99_FREE_MEMORY_CORRUPTOR
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#ifdef M100_FREE_MEMORY_CORRUPTOR
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if ( code_seen('C') ) {
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int x; // x gets the # of locations to corrupt within the memory pool
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x = code_value();
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@ -190,12 +190,12 @@ int i, j, n;
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#endif
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//
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// M99 I Initializes the free memory pool so it can be watched and prints vital
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// M100 I Initializes the free memory pool so it can be watched and prints vital
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// statistics that define the free memory pool.
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//
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if (m99_not_initialized || code_seen('I') ) { // If no sub-command is specified, the first time
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if (m100_not_initialized || code_seen('I') ) { // If no sub-command is specified, the first time
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SERIAL_ECHOLNPGM("Initializing free memory block.\n"); // this happens, it will Initialize.
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ptr = (unsigned char *) __brkval; // Repeated M99 with no sub-command will not destroy the
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ptr = (unsigned char *) __brkval; // Repeated M100 with no sub-command will not destroy the
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SERIAL_ECHOPAIR("\n__brkval : ",(long) ptr ); // state of the initialized free memory pool.
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ptr += 8;
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@ -219,7 +219,7 @@ int i, j, n;
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SERIAL_ECHOLNPGM("\n");
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}
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}
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m99_not_initialized = 0;
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m100_not_initialized = 0;
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SERIAL_ECHOLNPGM("Done.\n");
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return;
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}
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@ -230,8 +230,8 @@ int i, j, n;
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// the stack once the function returns to the caller.
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unsigned char *top_of_stack() {
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unsigned char x;
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return &x;
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unsigned char x;
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return &x + 1; // x is pulled on return;
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}
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//
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