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-rw-r--r--openpicc/application/cmd.c2
-rw-r--r--openpicc/application/cmd.h2
-rw-r--r--openpicc/application/iso14443a_diffmiller.c19
-rw-r--r--openpicc/application/iso14443a_manchester.c2
-rw-r--r--openpicc/application/main.c2
-rw-r--r--openpicc/application/performance.c145
-rw-r--r--openpicc/application/performance.h25
-rw-r--r--openpicc/application/tc_sniffer.c139
8 files changed, 273 insertions, 63 deletions
diff --git a/openpicc/application/cmd.c b/openpicc/application/cmd.c
index 58b341d..4d7d6b2 100644
--- a/openpicc/application/cmd.c
+++ b/openpicc/application/cmd.c
@@ -68,7 +68,7 @@ void DumpUIntToUSB(unsigned int data)
}
/**********************************************************************/
-void DumpStringToUSB(char* text)
+void DumpStringToUSB(const char* text)
{
usb_print_string(text);
}
diff --git a/openpicc/application/cmd.h b/openpicc/application/cmd.h
index a93d8f0..aec4fd9 100644
--- a/openpicc/application/cmd.h
+++ b/openpicc/application/cmd.h
@@ -12,7 +12,7 @@ typedef struct {
portBASE_TYPE vCmdInit(void);
extern void DumpUIntToUSB(unsigned int data);
-extern void DumpStringToUSB(char *string);
+extern void DumpStringToUSB(const char *string);
extern void DumpBufferToUSB(char* buffer, int len);
extern void DumpTimeToUSB(long ticks);
extern xQueueHandle xCmdQueue;
diff --git a/openpicc/application/iso14443a_diffmiller.c b/openpicc/application/iso14443a_diffmiller.c
index 85f9518..020760f 100644
--- a/openpicc/application/iso14443a_diffmiller.c
+++ b/openpicc/application/iso14443a_diffmiller.c
@@ -31,6 +31,8 @@
#include "iso14443a_diffmiller.h"
#include "usb_print.h"
+#include "performance.h"
+
#define DEBUGP (void)
#define printf usb_print_string
@@ -125,7 +127,7 @@ const struct decoder_table_entry decoder_table[][5] = {
[sym_z] = {NIENTE, {sym_z, NO_SYM}, {sym_x, NO_SYM}, {sym_y, NO_SYM}, {sym_y, NO_SYM}, },
};
-int print_bits = 1;
+int print_bits = 0;
inline void start_frame(struct diffmiller_state * const state)
{
@@ -134,10 +136,14 @@ inline void start_frame(struct diffmiller_state * const state)
state->parity=0;
state->crc=0x6363;
+ performance_set_checkpoint("start_frame before memset");
memset(&state->flags, 0, sizeof(state->flags));
state->flags.in_frame = 1;
- memset(state->frame, 0, sizeof(*state->frame));
+ //memset(state->frame, 0, sizeof(*state->frame));
+ //memset(state->frame, 0, (u_int32_t)&(((iso14443_frame*)0)->data) );
+ memset(state->frame, 0, 26 );
+ performance_set_checkpoint("start_frame after memset");
}
static inline void append_to_frame(struct diffmiller_state *const state,
@@ -165,7 +171,7 @@ static inline void append_to_frame(struct diffmiller_state *const state,
}
-static void end_frame(struct diffmiller_state * const state)
+static inline void end_frame(struct diffmiller_state * const state)
{
if(state->frame != NULL) {
if(state->counter > 0) {
@@ -181,7 +187,7 @@ static void end_frame(struct diffmiller_state * const state)
}
}
-static void Miller_Bit(struct diffmiller_state * const state, const enum bit bit)
+static inline void Miller_Bit(struct diffmiller_state * const state, const enum bit bit)
{
switch(bit) {
case BIT_SOF:
@@ -233,7 +239,7 @@ static void Miller_Bit(struct diffmiller_state * const state, const enum bit bit
}
}
-static void Miller_Symbol(struct diffmiller_state * const state, const enum symbol symbol)
+static inline void Miller_Symbol(struct diffmiller_state * const state, const enum symbol symbol)
{
static enum bit last_bit = BIT_ERROR;
static int in_frame = 0;
@@ -279,7 +285,7 @@ static void Miller_Symbol(struct diffmiller_state * const state, const enum symb
}
-static void Miller_Edge(struct diffmiller_state * const state, const unsigned int delta)
+static inline void Miller_Edge(struct diffmiller_state * const state, const unsigned int delta)
{
static enum symbol old_state = NO_SYM;
enum bit_length length = out_of_range;
@@ -326,6 +332,7 @@ int iso14443a_decode_diffmiller(struct diffmiller_state * const state, iso14443_
if(state->flags.frame_finished) {
state->flags.frame_finished = 0;
+ performance_set_checkpoint("frame finished");
return 0;
}
}
diff --git a/openpicc/application/iso14443a_manchester.c b/openpicc/application/iso14443a_manchester.c
index e8640fa..9822c60 100644
--- a/openpicc/application/iso14443a_manchester.c
+++ b/openpicc/application/iso14443a_manchester.c
@@ -59,7 +59,7 @@ enum parity {
PARITY_0, PARITY_1 /* Set fixed parity */
};
-static void manchester_enc_byte(u_int16_t **s16, u_int8_t data, enum parity parity)
+static inline void manchester_enc_byte(u_int16_t **s16, const u_int8_t data, const enum parity parity)
{
int i;
u_int8_t sum_1 = 0;
diff --git a/openpicc/application/main.c b/openpicc/application/main.c
index 9b81aea..8babafe 100644
--- a/openpicc/application/main.c
+++ b/openpicc/application/main.c
@@ -52,6 +52,7 @@
#include "iso14443a_pretender.h"
#include "decoder.h"
#include "tc_sniffer.h"
+#include "performance.h"
static inline int detect_board(void)
{
@@ -197,6 +198,7 @@ int main (void)
prvSetupHardware ();
usb_print_init();
decoder_init();
+ performance_init();
pio_irq_init();
diff --git a/openpicc/application/performance.c b/openpicc/application/performance.c
new file mode 100644
index 0000000..cffd094
--- /dev/null
+++ b/openpicc/application/performance.c
@@ -0,0 +1,145 @@
+/* T/C driver for performance measurements
+ *
+ * Copyright 2008 Henryk Plötz <henryk@ploetzli.ch>
+ *
+ * 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 2 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, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ *
+ */
+
+#include <FreeRTOS.h>
+#include <AT91SAM7.h>
+#include <openpicc.h>
+
+#include <string.h>
+
+#include "performance.h"
+#include "cmd.h"
+
+static AT91PS_TC tc_perf = AT91C_BASE_TC1;
+static u_int32_t overruns = 0;
+
+#define NUMBER_OF_CHECKPOINTS 20
+static struct performance_checkpoint checkpoints[NUMBER_OF_CHECKPOINTS];
+static int current_checkpoint;
+
+static void __ramfunc tc_perf_irq(void) __attribute__ ((naked));
+static void __ramfunc tc_perf_irq(void)
+{
+ portSAVE_CONTEXT();
+ u_int32_t sr = tc_perf->TC_SR;
+ if(sr & AT91C_TC_COVFS) overruns++;
+ AT91F_AIC_AcknowledgeIt();
+ portRESTORE_CONTEXT();
+}
+
+void performance_init(void)
+{
+ AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, ((u_int32_t) 1 << AT91C_ID_TC1));
+ /* clock is MCK/2, TIOA/B unconfigured, reset only on SWTRG, ignore Compare C */
+ tc_perf->TC_CMR = AT91C_TC_CLKS_TIMER_DIV1_CLOCK;
+
+ tc_perf->TC_CCR = AT91C_TC_CLKDIS;
+
+ AT91F_AIC_ConfigureIt(AT91C_ID_TC1, AT91C_AIC_PRIOR_HIGHEST-1,
+ AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL, (THandler)&tc_perf_irq);
+ tc_perf->TC_IER = AT91C_TC_COVFS;
+ AT91F_AIC_ClearIt(AT91C_ID_TC1);
+ AT91F_AIC_EnableIt(AT91C_ID_TC1);
+
+ memset(checkpoints, 0, sizeof(checkpoints));
+}
+
+inline void performance_start(void)
+{
+ memset(checkpoints, 0, sizeof(checkpoints));
+ current_checkpoint = 0;
+ overruns = 0;
+ tc_perf->TC_CCR = AT91C_TC_SWTRG | AT91C_TC_CLKEN;
+}
+
+inline perf_time_t performance_get(void)
+{
+ u_int32_t cv = tc_perf->TC_CV;
+ perf_time_t result = {
+ .high = overruns,
+ .low = cv,
+ };
+ return result;
+}
+
+inline perf_time_t performance_stop(void)
+{
+ perf_time_t result = performance_get();
+ tc_perf->TC_CCR = AT91C_TC_CLKDIS;
+ return result;
+}
+
+void performance_print(perf_time_t time)
+{
+ DumpUIntToUSB(time.high);
+ DumpStringToUSB(":");
+ DumpUIntToUSB(time.low);
+}
+
+perf_time_t performance_diff(perf_time_t a, perf_time_t b)
+{
+ // assert that a <= b
+ if( (a.high > b.high) || (a.high == b.high && a.low > b.low) ) return performance_diff(b, a);
+ perf_time_t result = { b.high - a.high, 0 };
+ if(b.high == a.high) result.low = b.low - a.low;
+
+ return result;
+}
+
+void performance_set_checkpoint(const char * const description)
+{
+ if(current_checkpoint < NUMBER_OF_CHECKPOINTS) {
+ perf_time_t time = performance_get();
+ checkpoints[current_checkpoint++] = (struct performance_checkpoint){
+ .time = time,
+ .description = description,
+ };
+ }
+}
+
+void performance_stop_report(void)
+{
+ perf_time_t _now = performance_stop();
+ struct performance_checkpoint now = {
+ .time = _now,
+ .description = "end of data collection",
+ };
+ perf_time_t last = {0,0};
+ int i;
+ DumpStringToUSB("Performance report: \n\r");
+ for(i = 0; i <= current_checkpoint; i++) {
+ struct performance_checkpoint current = (i<current_checkpoint ? checkpoints[i] : now);
+
+ DumpStringToUSB("\t");
+ performance_print(current.time);
+ DumpStringToUSB(" \t");
+
+ if(last.high == 0 && last.low == 0)
+ DumpStringToUSB(" ");
+ else
+ performance_print(performance_diff(last, current.time));
+ last = current.time;
+ DumpStringToUSB(" \t");
+
+ if(current.description)
+ DumpStringToUSB(current.description);
+ DumpStringToUSB("\n\r");
+ }
+}
diff --git a/openpicc/application/performance.h b/openpicc/application/performance.h
new file mode 100644
index 0000000..fddd9d9
--- /dev/null
+++ b/openpicc/application/performance.h
@@ -0,0 +1,25 @@
+#ifndef PERFORMANCE_H_
+#define PERFORMANCE_H_
+
+extern void performance_start(void);
+extern void performance_init(void);
+
+typedef struct {
+ u_int32_t high; /* 32 bit count of overruns */
+ u_int32_t low; /* 16 bit from T/C running at MCK/2 */
+} perf_time_t;
+
+extern perf_time_t performance_get(void);
+extern perf_time_t performance_stop(void);
+
+extern void performance_print(perf_time_t time);
+
+struct performance_checkpoint {
+ perf_time_t time;
+ const char * description;
+};
+
+extern void performance_set_checkpoint(const char * const description);
+extern void performance_stop_report(void);
+
+#endif /*PERFORMANCE_H_*/
diff --git a/openpicc/application/tc_sniffer.c b/openpicc/application/tc_sniffer.c
index a77d790..cc21a2f 100644
--- a/openpicc/application/tc_sniffer.c
+++ b/openpicc/application/tc_sniffer.c
@@ -30,6 +30,7 @@
#include <FreeRTOS.h>
#include <openpicc.h>
#include <task.h>
+#include <semphr.h>
#include <string.h>
#include <USB-CDC.h>
@@ -43,6 +44,7 @@
#include "pio_irq.h"
#include "led.h"
#include "clock_switch.h"
+#include "performance.h"
#include "iso14443a_diffmiller.h"
@@ -50,6 +52,7 @@
* Strategy: Double buffering.
*/
+static xSemaphoreHandle data_semaphore;
struct diffmiller_state *decoder;
iso14443_frame rx_frame;
@@ -71,32 +74,26 @@ enum { NONE, REQUEST_START, REQUEST_STOP } request_change = REQUEST_START;
#define MIN(a, b) ((a)>(b)?(b):(a))
static int overruns = 0;
-void flush_buffer(fiq_buffer_t *buffer)
+static void handle_buffer(u_int32_t data[], unsigned int count)
{
- /* Write all data from the given buffer out, then zero the count */
- if(buffer->count > 0) {
- if(buffer->count >= BUFSIZE) {
- DumpStringToUSB("Warning: Possible buffer overrun detected\n\r");
- overruns++;
- }
- buffer->count = MIN(buffer->count, BUFSIZE);
#ifdef USE_BINARY_PROTOCOL
- vUSBSendBuffer_blocking((unsigned char*)(&(buffer->data[0])), 0, MIN(buffer->count,BUFSIZE)*4, WAIT_TICKS);
- if(buffer->count >= BUFSIZE)
+ vUSBSendBuffer_blocking((unsigned char*)(&data[0]), 0, MIN(count,BUFSIZE)*4, WAIT_TICKS);
+ if(count >= BUFSIZE)
vUSBSendBuffer_blocking((unsigned char*)"////", 0, 4, WAIT_TICKS);
else
vUSBSendBuffer_blocking((unsigned char*)"____", 0, 4, WAIT_TICKS);
#elif defined(PRINT_TIMES)
unsigned int i=0;
- for(i=0; i<buffer->count; i++) {
- DumpUIntToUSB(buffer->data[i]);
+ for(i=0; i<count; i++) {
+ DumpUIntToUSB(data[i]);
DumpStringToUSB(" ");
}
DumpStringToUSB("\n\r");
#else
unsigned int offset = 0;
- while(offset < buffer->count) {
- int ret = iso14443a_decode_diffmiller(decoder, &rx_frame, buffer->data, &offset, buffer->count);
+ while(offset < count) {
+ int ret = iso14443a_decode_diffmiller(decoder, &rx_frame, data, &offset, count);
+ /*
DumpStringToUSB("\n\r");
if(ret < 0) {
DumpStringToUSB("-");
@@ -105,7 +102,7 @@ void flush_buffer(fiq_buffer_t *buffer)
DumpUIntToUSB(ret);
}
DumpStringToUSB(" ");
- DumpUIntToUSB(offset); DumpStringToUSB(" "); DumpUIntToUSB(buffer->count); DumpStringToUSB(" "); DumpUIntToUSB(overruns);
+ DumpUIntToUSB(offset); DumpStringToUSB(" "); DumpUIntToUSB(count); DumpStringToUSB(" "); DumpUIntToUSB(overruns);
DumpStringToUSB("\n\r");
if(ret >= 0) {
DumpStringToUSB("Frame finished, ");
@@ -118,9 +115,22 @@ void flush_buffer(fiq_buffer_t *buffer)
case CRC_ERROR: DumpStringToUSB("CRC ERROR\n\r"); break;
case CRC_UNCALCULATED: DumpStringToUSB("CRC UNCALCULATED\n\r"); break;
}
- }
+ }*/
+ (void)ret;
}
#endif
+}
+
+void flush_buffer(fiq_buffer_t *buffer)
+{
+ /* Write all data from the given buffer out, then zero the count */
+ if(buffer->count > 0) {
+ if(buffer->count >= BUFSIZE) {
+ DumpStringToUSB("Warning: Possible buffer overrun detected\n\r");
+ overruns++;
+ }
+ buffer->count = MIN(buffer->count, BUFSIZE);
+ handle_buffer(buffer->data, buffer->count);
buffer->count = 0;
}
}
@@ -133,10 +143,60 @@ void start_stop_sniffing(void)
request_change = REQUEST_START;
}
+static portBASE_TYPE tc_sniffer_irq(u_int32_t pio, portBASE_TYPE xTaskWoken)
+{
+ (void)pio;
+ usb_print_string_f("?", 0);
+ xTaskWoken = xSemaphoreGiveFromISR(data_semaphore, xTaskWoken);
+ return xTaskWoken;
+}
+
+static void main_loop(void)
+{
+ int current = 0;
+
+ while(1) {
+ /* Main loop of the sniffer */
+ //vTaskDelay(1000 * portTICK_RATE_MS);
+
+ u_int32_t start = *AT91C_TC2_CV;
+ int next = (current+1)%(sizeof(fiq_buffers)/sizeof(fiq_buffers[0]));
+ flush_buffer( &fiq_buffers[next] );
+ /* The buffer designated by next is now empty, give it to the fiq,
+ * we'll just guess that this write is atomic */
+ tc_sniffer_next_buffer_for_fiq = &fiq_buffers[current=next];
+ u_int32_t stop = *AT91C_TC2_CV;
+
+ DumpStringToUSB("{"); DumpUIntToUSB(start); DumpStringToUSB(":"); DumpUIntToUSB(stop); DumpStringToUSB("}");
+ if(*AT91C_TC2_CV > 2*128) {
+ u_int32_t dummybuf[1] = {*AT91C_TC2_CV};
+ handle_buffer(dummybuf, 1);
+
+ usb_print_string_f("[", 0);
+ while(xSemaphoreTake(data_semaphore, portMAX_DELAY) == pdFALSE) ;
+ usb_print_string_f("]", 0);
+ }
+ }
+}
+
+static u_int32_t testdata[] = {65535, 75, 138, 75, 138, 139, 139, 300};
+static u_int32_t testdata2[] = {65535, 80, 144, 208, 208, 208, 80, 80, 208, 208, 208, 208, 80, 144, 80, 144, 144, 80, 144, 208, 81, 80, 80, 81, 80, 81, 209, 209, 209, 80, 81, 145, 81, 300};
+
+static void timing_loop(void)
+{
+ while(1) {
+ vTaskDelay(5000*portTICK_RATE_MS);
+ performance_start();
+ handle_buffer(testdata, sizeof(testdata)/sizeof(testdata[0]));
+ performance_set_checkpoint("end of first buffer");
+ handle_buffer(testdata2, sizeof(testdata2)/sizeof(testdata2[0]));
+ performance_stop_report();
+ }
+}
+
void tc_sniffer (void *pvParameters)
{
(void)pvParameters;
-
/* Disable load modulation circuitry
* (Must be done explicitly, because the default state is pull-up high, leading
* to a constant modulation output which prevents reception. I've been bitten by
@@ -172,46 +232,17 @@ void tc_sniffer (void *pvParameters)
}
if(!decoder) vLedHaltBlinking(1);
+ vSemaphoreCreateBinary(data_semaphore);
+ if(data_semaphore == NULL) vLedHaltBlinking(3);
// The change interrupt is going to be handled by the FIQ
AT91F_PIO_CfgInput(AT91C_BASE_PIOA, OPENPICC_SSC_DATA);
+ if( pio_irq_register(OPENPICC_SSC_DATA, &tc_sniffer_irq) < 0)
+ vLedHaltBlinking(2);
pio_irq_enable(OPENPICC_SSC_DATA);
-
- int current = 0;
- while(1) {
- /* Main loop of the sniffer */
-
- if(currently_sniffing) {
- int next = (current+1)%(sizeof(fiq_buffers)/sizeof(fiq_buffers[0]));
- flush_buffer( &fiq_buffers[next] );
- /* The buffer designated by next is now empty, give it to the fiq,
- * we'll just guess that this write is atomic */
- tc_sniffer_next_buffer_for_fiq = &fiq_buffers[current=next];
- if(request_change == REQUEST_STOP) {
- currently_sniffing = 0;
- request_change = NONE;
-
- tc_sniffer_next_buffer_for_fiq = 0;
- memset(fiq_buffers, 0, sizeof(fiq_buffers));
- current = 0;
-#ifdef USE_BINARY_PROTOCOL
- vUSBSendBuffer_blocking((unsigned char *)"----", 0, 4, WAIT_TICKS);
- usb_print_set_force_silence(0);
-#endif
- } else vTaskDelay(2* portTICK_RATE_MS);
- } else {
- // Do nothing, wait longer
-
- if(request_change == REQUEST_START) {
- // Prevent usb_print code from barging in
-#ifdef USE_BINARY_PROTOCOL
- usb_print_set_force_silence(1);
- vUSBSendBuffer_blocking((unsigned char *)"----", 0, 4, WAIT_TICKS);
-#endif
- currently_sniffing = 1;
- request_change = NONE;
- } else vTaskDelay(100 * portTICK_RATE_MS);
- }
- }
+ //main_loop();
+ timing_loop();
+
+ (void)main_loop; (void)timing_loop;
}
personal git repositories of Harald Welte. Your mileage may vary