You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
258 lines
8.4 KiB
258 lines
8.4 KiB
/**
|
|
* Marlin 3D Printer Firmware
|
|
* Copyright (C) 2016 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
|
|
*
|
|
* Based on Sprinter and grbl.
|
|
* Copyright (C) 2011 Camiel Gubbels / Erik van der Zalm
|
|
*
|
|
* This program is free software: you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License as published by
|
|
* the Free Software Foundation, either version 3 of the License, or
|
|
* (at your option) any later version.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program. If not, see <http://www.gnu.org/licenses/>.
|
|
*
|
|
*/
|
|
|
|
/**
|
|
* M100 Free Memory Watcher
|
|
*
|
|
* This code watches the free memory block between the bottom of the heap and the top of the stack.
|
|
* This memory block is initialized and watched via the M100 command.
|
|
*
|
|
* M100 I Initializes the free memory block and prints vitals statistics about the area
|
|
* M100 F Identifies how much of the free memory block remains free and unused. It also
|
|
* detects and reports any corruption within the free memory block that may have
|
|
* happened due to errant firmware.
|
|
* M100 D Does a hex display of the free memory block along with a flag for any errant
|
|
* data that does not match the expected value.
|
|
* M100 C x Corrupts x locations within the free memory block. This is useful to check the
|
|
* correctness of the M100 F and M100 D commands.
|
|
*
|
|
* Initial version by Roxy-3DPrintBoard
|
|
*/
|
|
#define M100_FREE_MEMORY_DUMPER // Comment out to remove Dump sub-command
|
|
#define M100_FREE_MEMORY_CORRUPTOR // Comment out to remove Corrupt sub-command
|
|
|
|
#include "Marlin.h"
|
|
|
|
#if ENABLED(M100_FREE_MEMORY_WATCHER)
|
|
extern void* __brkval;
|
|
extern size_t __heap_start, __heap_end, __flp;
|
|
|
|
|
|
//
|
|
// Utility functions used by M100 to get its work done.
|
|
//
|
|
|
|
unsigned char* top_of_stack();
|
|
void prt_hex_nibble(unsigned int);
|
|
void prt_hex_byte(unsigned int);
|
|
void prt_hex_word(unsigned int);
|
|
int how_many_E5s_are_here(unsigned char*);
|
|
|
|
|
|
|
|
|
|
void gcode_M100() {
|
|
static int m100_not_initialized = 1;
|
|
unsigned char* sp, *ptr;
|
|
int i, j, n;
|
|
//
|
|
// M100 D dumps the free memory block from __brkval to the stack pointer.
|
|
// malloc() eats memory from the start of the block and the stack grows
|
|
// up from the bottom of the block. Solid 0xE5's indicate nothing has
|
|
// used that memory yet. There should not be anything but 0xE5's within
|
|
// the block of 0xE5's. If there is, that would indicate memory corruption
|
|
// probably caused by bad pointers. Any unexpected values will be flagged in
|
|
// the right hand column to help spotting them.
|
|
//
|
|
#if ENABLED(M100_FREE_MEMORY_DUMPER) // Disable to remove Dump sub-command
|
|
if (code_seen('D')) {
|
|
ptr = (unsigned char*) __brkval;
|
|
//
|
|
// We want to start and end the dump on a nice 16 byte boundry even though
|
|
// the values we are using are not 16 byte aligned.
|
|
//
|
|
SERIAL_ECHOPGM("\n__brkval : ");
|
|
prt_hex_word((unsigned int) ptr);
|
|
ptr = (unsigned char*)((unsigned long) ptr & 0xfff0);
|
|
sp = top_of_stack();
|
|
SERIAL_ECHOPGM("\nStack Pointer : ");
|
|
prt_hex_word((unsigned int) sp);
|
|
SERIAL_ECHOPGM("\n");
|
|
sp = (unsigned char*)((unsigned long) sp | 0x000f);
|
|
n = sp - ptr;
|
|
//
|
|
// This is the main loop of the Dump command.
|
|
//
|
|
while (ptr < sp) {
|
|
prt_hex_word((unsigned int) ptr); // Print the address
|
|
SERIAL_ECHOPGM(":");
|
|
for (i = 0; i < 16; i++) { // and 16 data bytes
|
|
prt_hex_byte(*(ptr + i));
|
|
SERIAL_ECHOPGM(" ");
|
|
delay(2);
|
|
}
|
|
SERIAL_ECHO("|"); // now show where non 0xE5's are
|
|
for (i = 0; i < 16; i++) {
|
|
delay(2);
|
|
if (*(ptr + i) == 0xe5)
|
|
SERIAL_ECHOPGM(" ");
|
|
else
|
|
SERIAL_ECHOPGM("?");
|
|
}
|
|
SERIAL_ECHO("\n");
|
|
ptr += 16;
|
|
delay(2);
|
|
}
|
|
SERIAL_ECHOLNPGM("Done.\n");
|
|
return;
|
|
}
|
|
#endif
|
|
//
|
|
// M100 F requests the code to return the number of free bytes in the memory pool along with
|
|
// other vital statistics that define the memory pool.
|
|
//
|
|
if (code_seen('F')) {
|
|
#if 0
|
|
int max_addr = (int) __brkval;
|
|
int max_cnt = 0;
|
|
#endif
|
|
int block_cnt = 0;
|
|
ptr = (unsigned char*) __brkval;
|
|
sp = top_of_stack();
|
|
n = sp - ptr;
|
|
// Scan through the range looking for the biggest block of 0xE5's we can find
|
|
for (i = 0; i < n; i++) {
|
|
if (*(ptr + i) == (unsigned char) 0xe5) {
|
|
j = how_many_E5s_are_here((unsigned char*) ptr + i);
|
|
if (j > 8) {
|
|
SERIAL_ECHOPAIR("Found ", j);
|
|
SERIAL_ECHOPGM(" bytes free at 0x");
|
|
prt_hex_word((int) ptr + i);
|
|
SERIAL_ECHOPGM("\n");
|
|
i += j;
|
|
block_cnt++;
|
|
}
|
|
#if 0
|
|
if (j > max_cnt) { // We don't do anything with this information yet
|
|
max_cnt = j; // but we do know where the biggest free memory block is.
|
|
max_addr = (int) ptr + i;
|
|
}
|
|
#endif
|
|
}
|
|
}
|
|
if (block_cnt > 1)
|
|
SERIAL_ECHOLNPGM("\nMemory Corruption detected in free memory area.\n");
|
|
SERIAL_ECHO("\nDone.\n");
|
|
return;
|
|
}
|
|
//
|
|
// M100 C x Corrupts x locations in the free memory pool and reports the locations of the corruption.
|
|
// This is useful to check the correctness of the M100 D and the M100 F commands.
|
|
//
|
|
#if ENABLED(M100_FREE_MEMORY_CORRUPTOR)
|
|
if (code_seen('C')) {
|
|
int x = code_value_int(); // x gets the # of locations to corrupt within the memory pool
|
|
SERIAL_ECHOLNPGM("Corrupting free memory block.\n");
|
|
ptr = (unsigned char*) __brkval;
|
|
SERIAL_ECHOPAIR("\n__brkval : ", ptr);
|
|
ptr += 8;
|
|
sp = top_of_stack();
|
|
SERIAL_ECHOPAIR("\nStack Pointer : ", sp);
|
|
SERIAL_ECHOLNPGM("\n");
|
|
n = sp - ptr - 64; // -64 just to keep us from finding interrupt activity that
|
|
// has altered the stack.
|
|
j = n / (x + 1);
|
|
for (i = 1; i <= x; i++) {
|
|
*(ptr + (i * j)) = i;
|
|
SERIAL_ECHO("\nCorrupting address: 0x");
|
|
prt_hex_word((unsigned int)(ptr + (i * j)));
|
|
}
|
|
SERIAL_ECHOLNPGM("\n");
|
|
return;
|
|
}
|
|
#endif
|
|
//
|
|
// M100 I Initializes the free memory pool so it can be watched and prints vital
|
|
// statistics that define the free memory pool.
|
|
//
|
|
if (m100_not_initialized || code_seen('I')) { // If no sub-command is specified, the first time
|
|
SERIAL_ECHOLNPGM("Initializing free memory block.\n"); // this happens, it will Initialize.
|
|
ptr = (unsigned char*) __brkval; // Repeated M100 with no sub-command will not destroy the
|
|
SERIAL_ECHOPAIR("\n__brkval : ", ptr); // state of the initialized free memory pool.
|
|
ptr += 8;
|
|
sp = top_of_stack();
|
|
SERIAL_ECHOPAIR("\nStack Pointer : ", sp);
|
|
SERIAL_ECHOLNPGM("\n");
|
|
n = sp - ptr - 64; // -64 just to keep us from finding interrupt activity that
|
|
// has altered the stack.
|
|
SERIAL_ECHO(n);
|
|
SERIAL_ECHOLNPGM(" bytes of memory initialized.\n");
|
|
for (i = 0; i < n; i++)
|
|
*(ptr + i) = (unsigned char) 0xe5;
|
|
for (i = 0; i < n; i++) {
|
|
if (*(ptr + i) != (unsigned char) 0xe5) {
|
|
SERIAL_ECHOPAIR("? address : ", ptr + i);
|
|
SERIAL_ECHOPAIR("=", *(ptr + i));
|
|
SERIAL_ECHOLNPGM("\n");
|
|
}
|
|
}
|
|
m100_not_initialized = 0;
|
|
SERIAL_ECHOLNPGM("Done.\n");
|
|
return;
|
|
}
|
|
return;
|
|
}
|
|
|
|
// top_of_stack() returns the location of a variable on its stack frame. The value returned is above
|
|
// the stack once the function returns to the caller.
|
|
|
|
unsigned char* top_of_stack() {
|
|
unsigned char x;
|
|
return &x + 1; // x is pulled on return;
|
|
}
|
|
|
|
//
|
|
// 3 support routines to print hex numbers. We can print a nibble, byte and word
|
|
//
|
|
|
|
void prt_hex_nibble(unsigned int n) {
|
|
if (n <= 9)
|
|
SERIAL_ECHO(n);
|
|
else
|
|
SERIAL_ECHO((char)('A' + n - 10));
|
|
delay(2);
|
|
}
|
|
|
|
void prt_hex_byte(unsigned int b) {
|
|
prt_hex_nibble((b & 0xf0) >> 4);
|
|
prt_hex_nibble(b & 0x0f);
|
|
}
|
|
|
|
void prt_hex_word(unsigned int w) {
|
|
prt_hex_byte((w & 0xff00) >> 8);
|
|
prt_hex_byte(w & 0x0ff);
|
|
}
|
|
|
|
// how_many_E5s_are_here() is a utility function to easily find out how many 0xE5's are
|
|
// at the specified location. Having this logic as a function simplifies the search code.
|
|
//
|
|
int how_many_E5s_are_here(unsigned char* p) {
|
|
int n;
|
|
for (n = 0; n < 32000; n++) {
|
|
if (*(p + n) != (unsigned char) 0xe5)
|
|
return n - 1;
|
|
}
|
|
return -1;
|
|
}
|
|
|
|
#endif
|
|
|
|
|