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move the clear buffer outside of potentially time..

Browse source 
... sensitive routines
see http://www.proxmark.org/forum/viewtopic.php?id=2820
This commit is contained in:
marshmellow42 2016-02-20 10:07:44 -05:00
parent 35cfcfc7a1
commit 3cec706139
5 changed files with 19 additions and 1 deletions
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4
armsrc/BigBuf.c
View file

@ -61,6 +61,10 @@ void BigBuf_Clear_ext(bool verbose)
Dbprintf("Buffer cleared (%i bytes)",BIGBUF_SIZE);
}
void BigBuf_Clear_keep_EM(void)
{
memset(BigBuf,0,BigBuf_hi);
}
// allocate a chunk of memory from BigBuf. We allocate high memory first. The unallocated memory
// at the beginning of BigBuf is always for traces/samples

1
armsrc/BigBuf.h
View file

@ -26,6 +26,7 @@ extern uint8_t *BigBuf_get_EM_addr(void);
extern uint16_t BigBuf_max_traceLen(void);
extern void BigBuf_Clear(void);
extern void BigBuf_Clear_ext(bool verbose);
extern void BigBuf_Clear_keep_EM(void);
extern uint8_t *BigBuf_malloc(uint16_t);
extern void BigBuf_free(void);
extern void BigBuf_free_keep_EM(void);

11
armsrc/lfops.c
View file

@ -37,6 +37,8 @@ void ModThenAcquireRawAdcSamples125k(uint32_t delay_off, uint32_t period_0, uint
sample_config sc = { 0,0,1, divisor_used, 0};
setSamplingConfig(&sc);
//clear read buffer
BigBuf_Clear_keep_EM(void);
/* Make sure the tag is reset */
FpgaDownloadAndGo(FPGA_BITSTREAM_LF);
@ -752,6 +754,9 @@ void CmdHIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
//clear read buffer
BigBuf_Clear_keep_EM(void);
while(!BUTTON_PRESS() && !usb_poll_validate_length()) {
WDT_HIT();
@ -837,6 +842,8 @@ void CmdAWIDdemodFSK(int findone, int *high, int *low, int ledcontrol)
uint8_t *dest = BigBuf_get_addr();
size_t size;
int idx=0;
//clear read buffer
BigBuf_Clear_keep_EM(void);
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
@ -927,6 +934,8 @@ void CmdEM410xdemod(int findone, int *high, int *low, int ledcontrol)
int clk=0, invert=0, errCnt=0, maxErr=20;
uint32_t hi=0;
uint64_t lo=0;
//clear read buffer
BigBuf_Clear_keep_EM(void);
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);
@ -986,6 +995,8 @@ void CmdIOdemodFSK(int findone, int *high, int *low, int ledcontrol)
uint8_t version=0;
uint8_t facilitycode=0;
uint16_t number=0;
//clear read buffer
BigBuf_Clear_keep_EM(void);
// Configure to go in 125Khz listen mode
LFSetupFPGAForADC(95, true);

2
armsrc/lfsampling.c
View file

@ -124,7 +124,7 @@ uint32_t DoAcquisition(uint8_t decimation, uint32_t bits_per_sample, bool averag
uint8_t *dest = BigBuf_get_addr();
int bufsize = BigBuf_max_traceLen();
memset(dest, 0, bufsize);
//memset(dest, 0, bufsize); //creates issues with cmdread (marshmellow)
if(bits_per_sample < 1) bits_per_sample = 1;
if(bits_per_sample > 8) bits_per_sample = 8;

2
armsrc/pcf7931.c
View file

@ -29,6 +29,8 @@ int DemodPCF7931(uint8_t **outBlocks) {
int num_blocks = 0;
int lmin=128, lmax=128;
uint8_t dir;
//clear read buffer
BigBuf_Clear_keep_EM(void);
LFSetupFPGAForADC(95, true);
DoAcquisition_default(0, true);