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-rw-r--r--controller/fw/Makefile10
-rw-r--r--controller/fw/levmarq/levmarq.c12
-rw-r--r--controller/fw/src/adc.c12
-rw-r--r--controller/fw/src/freq_meas.c27
-rw-r--r--controller/fw/src/main.c75
-rw-r--r--controller/fw/src/system_stm32f4xx.c5
-rw-r--r--controller/fw/tools/dsss_demod_test.c2
-rw-r--r--controller/fw/tools/e2e_test.c111
-rw-r--r--controller/fw/tools/freq_meas_test.c6
-rw-r--r--controller/fw/tools/presig_gen.py16
10 files changed, 230 insertions, 46 deletions
diff --git a/controller/fw/Makefile b/controller/fw/Makefile
index 89960d2..0fea8ae 100644
--- a/controller/fw/Makefile
+++ b/controller/fw/Makefile
@@ -60,6 +60,7 @@ MUSL_SOURCES += $(MUSL_DIR)/src/math/tanhf.c $(MUSL_DIR)/src/math/atanhf.c
MUSL_SOURCES += $(MUSL_DIR)/src/math/expm1f.c $(MUSL_DIR)/src/math/log1pf.c
MUSL_SOURCES += $(MUSL_DIR)/src/math/expf.c $(MUSL_DIR)/src/math/exp2f_data.c
MUSL_SOURCES += $(MUSL_DIR)/src/math/powf.c
+MUSL_SOURCES += $(MUSL_DIR)/src/math/sqrtf.c
MUSL_SOURCES += $(MUSL_DIR)/src/math/fabsf.c
MUSL_SOURCES += $(MUSL_DIR)/src/stdlib/abs.c
MUSL_SOURCES += $(MUSL_DIR)/src/string/memset.c
@@ -84,6 +85,8 @@ LDSCRIPT := stm32f407.ld
PREFIX ?= arm-none-eabi-
+DEBUG ?= 1
+
CC := $(PREFIX)gcc
CXX := $(PREFIX)g++
LD := $(PREFIX)gcc
@@ -121,7 +124,7 @@ CFLAGS += -I$(abspath musl_include_shims)
COMMON_CFLAGS += -I$(BUILDDIR) -Isrc -Itinyaes
CFLAGS += -I$(CUBE_DIR)/Drivers/CMSIS/Device/ST/STM32F4xx/Include
-COMMON_CFLAGS += -O0 -std=gnu11 -g -DSTM32F407xx -DSTM32F4
+COMMON_CFLAGS += -O0 -std=gnu11 -g -DSTM32F407xx -DSTM32F4 -DDEBUG=$(DEBUG)
CFLAGS += $(ARCH_FLAGS) $(SYSTEM_FLAGS)
#SIM_CFLAGS += -mthumb -mcpu=cortex-m4 -mfloat-abi=soft
CFLAGS += -fno-common -ffunction-sections -fdata-sections
@@ -248,6 +251,11 @@ $(BUILDDIR)/tools/crypto_test: tools/crypto_test.c src/crypto.c tinyaes/aes.c $(
mkdir -p $(@D)
$(HOST_CC) $(COMMON_CFLAGS) $(SIM_CFLAGS) -lsodium -o $@ $^
+tools: $(BUILDDIR)/tools/e2e_test
+$(BUILDDIR)/tools/e2e_test: tools/e2e_test.c src/freq_meas.c levmarq/levmarq.c $(BUILDDIR)/generated/fmeas_fft_window.c $(CMSIS_SOURCES) src/dsss_demod.c $(BUILDDIR)/generated/dsss_cwt_wavelet.c $(BUILDDIR)/generated/gold_code_$(DSSS_GOLD_CODE_NBITS).c
+ mkdir -p $(@D)
+ $(HOST_CC) $(COMMON_CFLAGS) $(SIM_CFLAGS) -o $@ $^
+
$(BUILDDIR)/src/%.o: src/%.s
mkdir -p $(@D)
$(CC) $(COMMON_CFLAGS) $(CFLAGS) $(INT_CFLAGS) -o $@ -c $<
diff --git a/controller/fw/levmarq/levmarq.c b/controller/fw/levmarq/levmarq.c
index 4636c79..4a764db 100644
--- a/controller/fw/levmarq/levmarq.c
+++ b/controller/fw/levmarq/levmarq.c
@@ -17,8 +17,6 @@
#include <stdio.h>
#include <math.h>
-#include <arm_math.h>
-
#include "levmarq.h"
#include "simulation.h"
@@ -29,21 +27,13 @@
/* set parameters required by levmarq() to default values */
void levmarq_init(LMstat *lmstat)
{
- lmstat->max_it = 500;
+ lmstat->max_it = 100;
lmstat->init_lambda = 0.0001f;
lmstat->up_factor = 10.0f;
lmstat->down_factor = 10.0f;
lmstat->target_derr = 1e-12f;
}
-#ifndef SIMULATION
-float sqrtf(float arg) {
- float out=NAN;
- arm_sqrt_f32(arg, &out);
- return out;
-}
-#endif
-
/* perform least-squares minimization using the Levenberg-Marquardt
algorithm. The arguments are as follows:
diff --git a/controller/fw/src/adc.c b/controller/fw/src/adc.c
index 07431be..74f0aa9 100644
--- a/controller/fw/src/adc.c
+++ b/controller/fw/src/adc.c
@@ -51,8 +51,9 @@ void adc_init() {
ADC1->CR1 = (0<<ADC_CR1_RES_Pos) | (0<<ADC_CR1_DISCNUM_Pos) | ADC_CR1_DISCEN | (0<<ADC_CR1_AWDCH_Pos);
ADC1->CR2 = (1<<ADC_CR2_EXTEN_Pos) | (0<<ADC_CR2_EXTSEL_Pos) | ADC_CR2_DMA | ADC_CR2_ADON | ADC_CR2_DDS;
- ADC1->SQR3 = (adc_channel<<ADC_SQR3_SQ3_Pos);
+ ADC1->SQR3 = (adc_channel<<ADC_SQR3_SQ1_Pos);
ADC1->SQR1 = (0<<ADC_SQR1_L_Pos);
+ ADC1->SMPR2 = (7<<ADC_SMPR2_SMP0_Pos);
TIM1->CR2 = (2<<TIM_CR2_MMS_Pos); /* Enable update event on TRGO to provide a 1ms reference to rest of system */
TIM1->CCMR1 = (6<<TIM_CCMR1_OC1M_Pos) | (0<<TIM_CCMR1_CC1S_Pos);
@@ -86,11 +87,17 @@ void DMA2_Stream0_IRQHandler(void) {
uint8_t isr = (DMA2->LISR >> DMA_LISR_FEIF0_Pos) & 0x3f;
GPIOA->ODR ^= 1<<7;
+ GPIOA->BSRR = 1<<10;
if (isr & DMA_LISR_TCIF0) { /* Transfer complete */
/* Check we're done processing the old buffer */
- if (adc_fft_buf_ready_idx != -1)
+ if (adc_fft_buf_ready_idx != -1) { /* FIXME DEBUG */
+ GPIOA->BSRR = 1<<10<<16;
+ /* clear all flags */
+ adc_dma->LIFCR = isr<<DMA_LISR_FEIF0_Pos;
+ return;
panic();
+ }
/* Kickoff FFT */
int ct = !!(adc_stream->CR & DMA_SxCR_CT);
@@ -103,6 +110,7 @@ void DMA2_Stream0_IRQHandler(void) {
if (isr & DMA_LISR_TEIF0) /* Transfer error */
panic();
+ GPIOA->BSRR = 1<<10<<16;
/* clear all flags */
adc_dma->LIFCR = isr<<DMA_LISR_FEIF0_Pos;
}
diff --git a/controller/fw/src/freq_meas.c b/controller/fw/src/freq_meas.c
index 83a330c..020e12d 100644
--- a/controller/fw/src/freq_meas.c
+++ b/controller/fw/src/freq_meas.c
@@ -1,4 +1,8 @@
+#ifndef SIMULATION
+#include <stm32f407xx.h>
+#endif
+
#include <unistd.h>
#include <math.h>
@@ -57,7 +61,13 @@ int adc_buf_measure_freq(uint16_t adc_buf[FMEAS_FFT_LEN], float *out) {
DEBUG_PRINTN("%010f, ", in_buf[i]);
DEBUG_PRINTN("\n");
*/
+#ifndef SIMULATION
+ GPIOA->BSRR = 1<<12;
+#endif
arm_rfft_fast_f32(&fft_inst, in_buf, out_buf, 0);
+#ifndef SIMULATION
+ GPIOA->BSRR = 1<<12<<16;
+#endif
#define FMEAS_FFT_WINDOW_MIN_F_HZ 30.0f
#define FMEAS_FFT_WINDOW_MAX_F_HZ 70.0f
@@ -66,6 +76,7 @@ int adc_buf_measure_freq(uint16_t adc_buf[FMEAS_FFT_LEN], float *out) {
const size_t last_bin = (int)(FMEAS_FFT_WINDOW_MAX_F_HZ / binsize_hz + 0.5f);
const size_t nbins = last_bin - first_bin + 1;
+ /*
DEBUG_PRINT("binsize_hz=%f first_bin=%zd last_bin=%zd nbins=%zd", binsize_hz, first_bin, last_bin, nbins);
DEBUG_PRINTN(" [bins real] ");
for (size_t i=0; i<FMEAS_FFT_LEN/2; i+=2)
@@ -76,6 +87,7 @@ int adc_buf_measure_freq(uint16_t adc_buf[FMEAS_FFT_LEN], float *out) {
DEBUG_PRINT("\n");
DEBUG_PRINT("Repacking FFT results");
+ */
/* Copy real values of target data to front of output buffer */
for (size_t i=0; i<nbins; i++) {
float real = out_buf[2 * (first_bin + i)];
@@ -83,7 +95,9 @@ int adc_buf_measure_freq(uint16_t adc_buf[FMEAS_FFT_LEN], float *out) {
out_buf[i] = sqrtf(real*real + imag*imag);
}
+ /*
DEBUG_PRINT("Running Levenberg-Marquardt");
+ */
LMstat lmstat;
levmarq_init(&lmstat);
@@ -99,16 +113,29 @@ int adc_buf_measure_freq(uint16_t adc_buf[FMEAS_FFT_LEN], float *out) {
float par[3] = {
a_max, i_max, 1.0f
};
+ /*
DEBUG_PRINT(" par_pre={%010f, %010f, %010f}", par[0], par[1], par[2]);
+ */
+#ifndef SIMULATION
+ GPIOA->BSRR = 1<<12;
+#endif
if (levmarq(3, par, nbins, out_buf, NULL, func_gauss, func_gauss_grad, NULL, &lmstat) < 0) {
+#ifndef SIMULATION
+ GPIOA->BSRR = 1<<12<<16;
+#endif
*out = NAN;
return -1;
}
+#ifndef SIMULATION
+ GPIOA->BSRR = 1<<12<<16;
+#endif
+ /*
DEBUG_PRINT(" par_post={%010f, %010f, %010f}", par[0], par[1], par[2]);
DEBUG_PRINT("done.");
+ */
*out = (par[1] + first_bin) * binsize_hz;
return 0;
}
diff --git a/controller/fw/src/main.c b/controller/fw/src/main.c
index c03bcbb..fa5d50b 100644
--- a/controller/fw/src/main.c
+++ b/controller/fw/src/main.c
@@ -3,6 +3,7 @@
#include <stdint.h>
#include <assert.h>
#include <string.h>
+#include <math.h>
#include <stm32f407xx.h>
@@ -159,50 +160,52 @@ void spi_flash_test(void) {
static unsigned int measurement_errors = 0;
static struct dsss_demod_state demod_state;
static uint32_t freq_sample_ts = 0;
-static uint32_t debug_last_freq = 0;
+static float debug_last_freq = 0;
int main(void)
{
- /* DEBUG */
- /* MCO2 */
+#if DEBUG
+ /* PLL clock on MCO2 (pin C9) */
RCC->AHB1ENR |= RCC_AHB1ENR_GPIOCEN;
GPIOC->MODER &= ~GPIO_MODER_MODER9_Msk;
GPIOC->MODER |= (2<<GPIO_MODER_MODER9_Pos);
GPIOC->AFR[1] &= ~GPIO_AFRH_AFSEL9_Msk;
GPIOC->OSPEEDR |= (3<<GPIO_OSPEEDR_OSPEED9_Pos); /* SCK */
RCC->CFGR |= (6<<RCC_CFGR_MCO2PRE_Pos) | (3<<RCC_CFGR_MCO2_Pos);
- /* END DEBUG */
+#endif
+
+ if (((SCB->CPACR>>20) & 0xf) != 0xf) {
+ asm volatile ("bkpt");
+ }
clock_setup();
led_setup();
- /*
spi_flash_setup();
adc_init();
- */
- /* DEBUG */
- /* TIM1 CC1 */
+#if DEBUG
+ /* TIM1 CC1 (ADC trigger) on pin A8 */
GPIOA->MODER &= ~GPIO_MODER_MODER8_Msk;
GPIOA->MODER |= (2<<GPIO_MODER_MODER8_Pos);
GPIOA->AFR[1] &= ~GPIO_AFRH_AFSEL8_Msk;
GPIOA->AFR[1] |= 1<<GPIO_AFRH_AFSEL8_Pos;
- /* END DEBUG */
- int cnt = 0;
- while (23) {
- if (cnt++ == 100000) {
- cnt = 0;
- GPIOA->ODR ^= 1<<6;
- }
+ GPIOA->MODER |= (1<<GPIO_MODER_MODER9_Pos) | (1<<GPIO_MODER_MODER10_Pos) | (1<<GPIO_MODER_MODER11_Pos) |
+ (1<<GPIO_MODER_MODER12_Pos) | (1<<GPIO_MODER_MODER15_Pos);
+#endif
+ while (23) {
if (adc_fft_buf_ready_idx != -1) {
+ GPIOA->BSRR = 1<<9;
+ adc_fft_buf_ready_idx = !adc_fft_buf_ready_idx; /* DEBUG */
memcpy(adc_fft_buf[!adc_fft_buf_ready_idx], adc_fft_buf[adc_fft_buf_ready_idx] + FMEAS_FFT_LEN/2, sizeof(adc_fft_buf[0][0]) * FMEAS_FFT_LEN/2);
+ GPIOA->BSRR = 1<<9<<16;
+ GPIOA->BSRR = 1<<11;
-#if 0
float out;
if (adc_buf_measure_freq(adc_fft_buf[adc_fft_buf_ready_idx], &out)) {
measurement_errors++;
- debug_last_freq = -1;
+ debug_last_freq = NAN;
} else {
debug_last_freq = out;
@@ -212,7 +215,7 @@ int main(void)
dsss_demod_step(&demod_state, out, freq_sample_ts);
*/
}
-#endif
+ GPIOA->BSRR = 1<<11<<16;
freq_sample_ts++; /* TODO: also increase in case of freq measurement error? */
adc_fft_buf_ready_idx = -1;
@@ -222,3 +225,39 @@ int main(void)
return 0;
}
+void NMI_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void HardFault_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void MemManage_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void BusFault_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void UsageFault_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void SVC_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void DebugMon_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void PendSV_Handler(void) {
+ asm volatile ("bkpt");
+}
+
+void SysTick_Handler(void) {
+ asm volatile ("bkpt");
+}
+
diff --git a/controller/fw/src/system_stm32f4xx.c b/controller/fw/src/system_stm32f4xx.c
index 9037604..5d005ed 100644
--- a/controller/fw/src/system_stm32f4xx.c
+++ b/controller/fw/src/system_stm32f4xx.c
@@ -165,10 +165,9 @@ const uint8_t APBPrescTable[8] = {0, 0, 0, 0, 1, 2, 3, 4};
*/
void SystemInit(void)
{
- /* FPU settings ------------------------------------------------------------*/
- #if (__FPU_PRESENT == 1) && (__FPU_USED == 1)
SCB->CPACR |= ((3UL << 10*2)|(3UL << 11*2)); /* set CP10 and CP11 Full Access */
- #endif
+ __DSB();
+ __ISB();
#if defined (DATA_IN_ExtSRAM) || defined (DATA_IN_ExtSDRAM)
SystemInit_ExtMemCtl();
diff --git a/controller/fw/tools/dsss_demod_test.c b/controller/fw/tools/dsss_demod_test.c
index 64fd889..7a4ca71 100644
--- a/controller/fw/tools/dsss_demod_test.c
+++ b/controller/fw/tools/dsss_demod_test.c
@@ -70,7 +70,7 @@ int main(int argc, char **argv) {
fprintf(stderr, "Reading %zd samples test data...", st.st_size/sizeof(float));
ssize_t nread = 0;
while (nread < st.st_size) {
- ssize_t rc = read(fd, buf, st.st_size - nread);
+ ssize_t rc = read(fd, buf + nread, st.st_size - nread);
if (rc == -EINTR || rc == -EAGAIN)
continue;
diff --git a/controller/fw/tools/e2e_test.c b/controller/fw/tools/e2e_test.c
new file mode 100644
index 0000000..935f70d
--- /dev/null
+++ b/controller/fw/tools/e2e_test.c
@@ -0,0 +1,111 @@
+
+#include <stdint.h>
+#include <math.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <string.h>
+#include <errno.h>
+#include <stdlib.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/fcntl.h>
+
+#include "freq_meas.h"
+#include "dsss_demod.h"
+
+typedef uint16_t adc_data_t;
+
+void handle_dsss_received(uint8_t data[static TRANSMISSION_SYMBOLS]) {
+ printf("data sequence received: [ ");
+ for (size_t i=0; i<TRANSMISSION_SYMBOLS; i++) {
+ printf("%+3d", ((data[i]&1) ? 1 : -1) * (data[i]>>1));
+ if (i+1 < TRANSMISSION_SYMBOLS)
+ printf(", ");
+ }
+ printf(" ]\n");
+}
+
+void print_usage(void);
+void print_usage() {
+ fprintf(stderr, "Usage: e2e_test [emulated_adc_data.bin]\n");
+}
+
+int main(int argc, char **argv) {
+ if (argc != 2) {
+ fprintf(stderr, "Error: Invalid arguments.\n");
+ print_usage();
+ return 1;
+ }
+
+ int fd = open(argv[1], O_RDONLY);
+ struct stat st;
+ if (fstat(fd, &st)) {
+ fprintf(stderr, "Error querying test data file size: %s\n", strerror(errno));
+ return 2;
+ }
+
+ if (st.st_size < 0 || st.st_size > 100000000) {
+ fprintf(stderr, "Error reading test data: too much test data (size=%zd)\n", st.st_size);
+ return 2;
+ }
+
+ if (st.st_size % sizeof(adc_data_t) != 0) {
+ fprintf(stderr, "Error reading test data: file size is not divisible by %zd (size=%zd)\n", sizeof(adc_data_t), st.st_size);
+ return 2;
+ }
+
+ char *buf = malloc(st.st_size);
+ if (!buf) {
+ fprintf(stderr, "Error allocating memory");
+ return 2;
+ }
+
+ const size_t n_samples = st.st_size / sizeof(adc_data_t);
+ fprintf(stderr, "Reading %zd samples test data...", n_samples);
+ ssize_t nread = 0;
+ while (nread < st.st_size) {
+ ssize_t rc = read(fd, buf + nread, st.st_size - nread);
+
+ if (rc == -EINTR || rc == -EAGAIN)
+ continue;
+
+ if (rc < 0) {
+ fprintf(stderr, "\nError reading test data: %s\n", strerror(errno));
+ return 2;
+ }
+
+ if (rc == 0) {
+ fprintf(stderr, "\nError reading test data: Unexpected end of file\n");
+ return 2;
+ }
+
+ nread += rc;
+ }
+ fprintf(stderr, " done. Read %zd bytes.\n", nread);
+
+ adc_data_t *buf_d = (adc_data_t *)buf;
+
+ struct dsss_demod_state demod;
+ dsss_demod_init(&demod);
+
+ fprintf(stderr, "Starting simulation.\n");
+ size_t iterations = (n_samples-FMEAS_FFT_LEN)/(FMEAS_FFT_LEN/2);
+ for (size_t i=0; i<iterations; i++) {
+
+ /*
+ fprintf(stderr, "Iteration %zd/%zd\n", i, iterations);
+ */
+ float res = NAN;
+ int rc = adc_buf_measure_freq(buf_d + i*(FMEAS_FFT_LEN/2), &res);
+ if (rc)
+ printf("ERROR: Simulation error in iteration %zd at position %zd: %d\n", i, i*(FMEAS_FFT_LEN/2), rc);
+
+ dsss_demod_step(&demod, res, i);
+ /*
+ printf("%09zd %12f\n", i, res);
+ */
+ }
+
+ free(buf);
+ return 0;
+}
diff --git a/controller/fw/tools/freq_meas_test.c b/controller/fw/tools/freq_meas_test.c
index e80290e..e2900ad 100644
--- a/controller/fw/tools/freq_meas_test.c
+++ b/controller/fw/tools/freq_meas_test.c
@@ -49,9 +49,9 @@ int main(int argc, char **argv) {
}
fprintf(stderr, "Reading %zd samples test data...", st.st_size/sizeof(float));
- size_t nread = 0;
+ ssize_t nread = 0;
while (nread < st.st_size) {
- ssize_t rc = read(fd, buf, st.st_size - nread);
+ ssize_t rc = read(fd, buf + nread, st.st_size - nread);
if (rc == -EINTR || rc == -EAGAIN)
continue;
@@ -100,5 +100,7 @@ int main(int argc, char **argv) {
printf("%09zd %12f\n", i, res);
}
+ free(buf);
+ free(sim_adc_buf);
return 0;
}
diff --git a/controller/fw/tools/presig_gen.py b/controller/fw/tools/presig_gen.py
index ff9dffe..3f85522 100644
--- a/controller/fw/tools/presig_gen.py
+++ b/controller/fw/tools/presig_gen.py
@@ -123,17 +123,17 @@ if __name__ == '__main__':
auth_parser.add_argument('height', type=int, help='Authentication string height, counting from 0 (root key)')
auth_parser.set_defaults(func=auth_cmd)
auth_parser.add_argument('-a', '--all', action='store_const', const='all', help='Vendor name for vendor domain')
- auth_parser.add_argument('-v', '--vendor', type=str, nargs='?', const=test_vendor, help='Vendor name for vendor domain')
- auth_parser.add_argument('-s', '--series', type=str, nargs='?', const=test_series, help='Series identifier for series domain')
- auth_parser.add_argument('-r', '--region', type=str, nargs='?', const=test_region, help='Region name for region domain')
- auth_parser.add_argument('-c', '--country', type=str, nargs='?', const=test_country, help='Country name for country domain')
+ auth_parser.add_argument('-v', '--vendor', type=str, nargs='?', const=TEST_VENDOR, help='Vendor name for vendor domain')
+ auth_parser.add_argument('-s', '--series', type=str, nargs='?', const=TEST_SERIES, help='Series identifier for series domain')
+ auth_parser.add_argument('-r', '--region', type=str, nargs='?', const=TEST_REGION, help='Region name for region domain')
+ auth_parser.add_argument('-c', '--country', type=str, nargs='?', const=TEST_COUNTRY, help='Country name for country domain')
prekey_parser = subparsers.add_parser('prekey', help='Generate prekey data .C source code file')
prekey_parser.add_argument('-m', '--max-height', type=int, default=8, help='Height of generated prekey')
- prekey_parser.add_argument('-v', '--vendor', type=str, default=test_vendor, help='Vendor name for vendor domain')
- prekey_parser.add_argument('-s', '--series', type=str, default=test_series, help='Series identifier for series domain')
- prekey_parser.add_argument('-r', '--region', type=str, default=test_region, help='Region name for region domain')
- prekey_parser.add_argument('-c', '--country', type=str, default=test_country, help='Country name for country domain')
+ prekey_parser.add_argument('-v', '--vendor', type=str, default=TEST_VENDOR, help='Vendor name for vendor domain')
+ prekey_parser.add_argument('-s', '--series', type=str, default=TEST_SERIES, help='Series identifier for series domain')
+ prekey_parser.add_argument('-r', '--region', type=str, default=TEST_REGION, help='Region name for region domain')
+ prekey_parser.add_argument('-c', '--country', type=str, default=TEST_COUNTRY, help='Country name for country domain')
prekey_parser.set_defaults(func=prekey_cmd, all='all')
args = parser.parse_args()