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-rw-r--r--.gitmodules3
-rw-r--r--controller/fw/Makefile65
m---------controller/fw/reed_solomon0
-rw-r--r--controller/fw/src/gpio_helpers.c46
-rw-r--r--controller/fw/src/gpio_helpers.h14
-rw-r--r--controller/fw/src/ldpc_decoder.c267
-rw-r--r--controller/fw/src/ldpc_decoder_test.py72
-rw-r--r--controller/fw/src/ldpc_wrapper.cpp84
-rw-r--r--controller/fw/src/main.c34
-rw-r--r--controller/fw/src/mspdebug_wrapper.c5
-rw-r--r--controller/fw/src/protocol.c2
-rw-r--r--controller/fw/src/rscode-config.h9
-rw-r--r--controller/fw/src/rslib.c29
-rw-r--r--controller/fw/src/rslib.h9
-rw-r--r--controller/fw/tools/reed_solomon.py81
15 files changed, 255 insertions, 465 deletions
diff --git a/.gitmodules b/.gitmodules
index 8fde57c..c7c888f 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -22,3 +22,6 @@
[submodule "controller/fw/tinyprintf"]
path = controller/fw/tinyprintf
url = https://github.com/cjlano/tinyprintf
+[submodule "controller/fw/reed_solomon"]
+ path = controller/fw/reed_solomon
+ url = git@git.jaseg.net:bigdata/pub/reed_solomon_c.git
diff --git a/controller/fw/Makefile b/controller/fw/Makefile
index ab9d66c..b6fa43f 100644
--- a/controller/fw/Makefile
+++ b/controller/fw/Makefile
@@ -9,6 +9,7 @@ MSPDEBUG_DIR ?= mspdebug
LIBSODIUM_DIR ?= libsodium
TINYAES_DIR ?= tinyaes
MUSL_DIR ?= musl
+RSLIB_DIR ?= reed_solomon
########################################################################################################################
# Algorithm parameters
@@ -56,34 +57,38 @@ C_SOURCES += tinyprintf/tinyprintf.c
C_SOURCES += $(MSPDEBUG_DIR)/drivers/jtaglib.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_init_f32.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/TransformFunctions/arm_rfft_fast_f32.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/TransformFunctions/arm_cfft_init_f32.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/TransformFunctions/arm_cfft_f32.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/TransformFunctions/arm_cfft_radix8_f32.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/CommonTables/arm_const_structs.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/CommonTables/arm_common_tables.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/TransformFunctions/arm_bitreversal.c
-CMSIS_SOURCES += $(CMSIS_DIR)/CMSIS/DSP/Source/TransformFunctions/arm_bitreversal2.c
-
-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
-MUSL_SOURCES += $(MUSL_DIR)/src/string/memcpy.c
-MUSL_SOURCES += $(MUSL_DIR)/src/math/__math_oflowf.c
-MUSL_SOURCES += $(MUSL_DIR)/src/math/__math_uflowf.c
-MUSL_SOURCES += $(MUSL_DIR)/src/math/__math_xflowf.c
-MUSL_SOURCES += $(MUSL_DIR)/src/math/__math_invalidf.c
-MUSL_SOURCES += $(MUSL_DIR)/src/math/powf_data.c
-
-C_SOURCES += $(CMSIS_SOURCES) $(MUSL_SOURCES)
-
-CXX_SOURCES += src/ldpc_wrapper.cpp
+CMSIS_SOURCES += TransformFunctions/arm_rfft_fast_init_f32.c
+CMSIS_SOURCES += TransformFunctions/arm_rfft_fast_f32.c
+CMSIS_SOURCES += TransformFunctions/arm_cfft_init_f32.c
+CMSIS_SOURCES += TransformFunctions/arm_cfft_f32.c
+CMSIS_SOURCES += TransformFunctions/arm_cfft_radix8_f32.c
+CMSIS_SOURCES += CommonTables/arm_const_structs.c
+CMSIS_SOURCES += CommonTables/arm_common_tables.c
+CMSIS_SOURCES += TransformFunctions/arm_bitreversal.c
+CMSIS_SOURCES += TransformFunctions/arm_bitreversal2.c
+CMSIS_SOURCES := $(addprefix $(CMSIS_DIR)/CMSIS/DSP/Source/,$(CMSIS_SOURCES))
+
+MUSL_SOURCES += math/tanhf.c math/atanhf.c
+MUSL_SOURCES += math/expm1f.c math/log1pf.c
+MUSL_SOURCES += math/expf.c math/exp2f_data.c
+MUSL_SOURCES += math/powf.c
+MUSL_SOURCES += math/sqrtf.c
+MUSL_SOURCES += math/fabsf.c
+MUSL_SOURCES += stdlib/abs.c
+MUSL_SOURCES += string/memset.c
+MUSL_SOURCES += string/memcpy.c
+MUSL_SOURCES += math/__math_oflowf.c
+MUSL_SOURCES += math/__math_uflowf.c
+MUSL_SOURCES += math/__math_xflowf.c
+MUSL_SOURCES += math/__math_invalidf.c
+MUSL_SOURCES += math/powf_data.c
+MUSL_SOURCES := $(addprefix $(MUSL_DIR)/src/,$(MUSL_SOURCES))
+
+RSLIB_SOURCES += $(addprefix $(RSLIB_DIR)/src/,rs.c ecc.c berlekamp.c galois.c)
+
+C_SOURCES += $(CMSIS_SOURCES) $(MUSL_SOURCES) $(RSLIB_SOURCES)
+
+CXX_SOURCES +=
BUILDDIR ?= build
BINARY := safetyreset.elf
@@ -299,8 +304,8 @@ $(BUILDDIR)/tinyaes/aes.o:
# mkdir -p $(BUILDDIR)/musl
# cd $(BUILDDIR)/musl && CFLAGS="$(SIM_CFLAGS) $(COMMON_CFLAGS)" CC=$(CC) LD=$(LD) AR=$(AR) $(MUSL_DIR_ABS)/configure && $(MAKE) TARGET=arm-linux-musleabihf GCC_CONFIG="-mcpu=cortex-m4 -mfloat-abi=soft" -j $(shell nproc)
-build/ldpc_decoder_test.so: src/ldpc_decoder.c
- gcc -fPIC -shared -Wall -Wextra -Wpedantic -std=gnu11 -O0 -g -o $@ $^
+build/rslib.so: $(RSLIB_SOURCES) src/rslib.c
+ gcc -fPIC -shared -Wall -Wextra -Wpedantic -std=gnu11 -O0 -g -o $@ -Isrc -I$(RSLIB_DIR)/src $^
clean:
rm -rf $(BUILDDIR)/src
diff --git a/controller/fw/reed_solomon b/controller/fw/reed_solomon
new file mode 160000
+Subproject 63ff1482d42547422896418d5990a66a80e88d3
diff --git a/controller/fw/src/gpio_helpers.c b/controller/fw/src/gpio_helpers.c
new file mode 100644
index 0000000..07b9a33
--- /dev/null
+++ b/controller/fw/src/gpio_helpers.c
@@ -0,0 +1,46 @@
+
+#include "gpio_helpers.h"
+
+void gpio_pin_mode(GPIO_TypeDef *gpio, int pin, int mode) {
+ gpio->MODER &= ~(3 << (2*pin));
+ gpio->MODER |= mode << (2*pin);
+}
+
+void gpio_pin_setup(GPIO_TypeDef *gpio, int pin, int mode, int speed, int pullups, int afsel) {
+ int gpio_idx = ((uint32_t)gpio>>10) & 0xf;
+ RCC->AHB1ENR |= 1<<gpio_idx;
+
+ gpio->MODER &= ~(3 << (2*pin));
+ gpio->MODER |= mode << (2*pin);
+ gpio->OSPEEDR &= ~(3 << (2*pin));
+ gpio->OSPEEDR |= speed << (2*pin);
+ gpio->PUPDR &= ~(3 << (2*pin));
+ gpio->PUPDR |= pullups << (2*pin);
+ gpio->AFR[pin>>3] &= ~(0xf << (4*(pin&7)));
+ gpio->AFR[pin>>3] |= afsel << (4*(pin&7));
+ gpio->BSRR = 1<<pin<<16;
+}
+
+void gpio_pin_output(GPIO_TypeDef *gpio, int pin, int speed) {
+ gpio_pin_setup(gpio, pin, 1, speed, 0, 0);
+}
+
+void gpio_pin_tristate(GPIO_TypeDef *gpio, int pin, int tristate) {
+ if (tristate)
+ gpio->MODER &= ~(3 << (2*pin));
+ else
+ gpio->MODER |= 1 << (2*pin);
+}
+
+void gpio_pin_input(GPIO_TypeDef *gpio, int pin, int pullups) {
+ gpio_pin_setup(gpio, pin, 0, 0, pullups, 0);
+}
+
+void gpio_pin_af(GPIO_TypeDef *gpio, int pin, int speed, int pullups, int afsel) {
+ gpio_pin_setup(gpio, pin, 2, speed, pullups, afsel);
+}
+
+void gpio_pin_analog(GPIO_TypeDef *gpio, int pin) {
+ gpio_pin_setup(gpio, pin, 3, 0, 0, 0);
+}
+
diff --git a/controller/fw/src/gpio_helpers.h b/controller/fw/src/gpio_helpers.h
new file mode 100644
index 0000000..abe2e85
--- /dev/null
+++ b/controller/fw/src/gpio_helpers.h
@@ -0,0 +1,14 @@
+#ifndef __GPIO_HELPERS_H__
+#define __GPIO_HELPERS_H__
+
+#include <stm32f407xx.h>
+
+void gpio_pin_mode(GPIO_TypeDef *gpio, int pin, int mode);
+void gpio_pin_setup(GPIO_TypeDef *gpio, int pin, int mode, int speed, int pullups, int afsel);
+void gpio_pin_output(GPIO_TypeDef *gpio, int pin, int speed);
+void gpio_pin_input(GPIO_TypeDef *gpio, int pin, int pullups);
+void gpio_pin_af(GPIO_TypeDef *gpio, int pin, int speed, int pullups, int afsel);
+void gpio_pin_analog(GPIO_TypeDef *gpio, int pin);
+void gpio_pin_tristate(GPIO_TypeDef *gpio, int pin, int tristate);
+
+#endif /* __GPIO_HELPERS_H__ */
diff --git a/controller/fw/src/ldpc_decoder.c b/controller/fw/src/ldpc_decoder.c
deleted file mode 100644
index fe59d77..0000000
--- a/controller/fw/src/ldpc_decoder.c
+++ /dev/null
@@ -1,267 +0,0 @@
-
-#include <stdint.h>
-#include <unistd.h>
-#include <stdbool.h>
-#include <math.h>
-#include <stdio.h>
-
-
-void gausselimination(size_t n, size_t k, int8_t *A, int8_t *b);
-
-void inner_logbp(
- size_t m, size_t n,
- size_t bits_count, size_t nodes_count, const uint32_t bits_values[], const uint32_t nodes_values[],
- int8_t Lc[],
- float Lq[], float Lr[],
- unsigned int n_iter,
- float L_posteriori_out[]);
-
-//decode(384, 6, 8, ...)
-int decode(size_t n, size_t nodes_count, size_t bits_count, uint32_t bits[], int8_t y[], int8_t out[], unsigned int maxiter) {
- const size_t m = n * nodes_count / bits_count;
- float Lq[m*n];
- float Lr[m*n];
- float L_posteriori[n];
-
- /* Calculate column bit positions from row bit positions */
- int32_t bits_transposed[nodes_count * n];
- for (size_t i=0; i<nodes_count * n; i++)
- bits_transposed[i] = -1;
-
- for (size_t i=0; i<m; i++) {
- for (size_t j=0; j<bits_count; j++) {
- int32_t *base = bits_transposed + bits[i*bits_count + j] * nodes_count;
- for (; *base != -1; base++)
- ;
- *base = i;
- }
- }
-
- /*
- printf("Row positions: [");
- for (size_t i=0; i<m*bits_count; i++) {
- if (i)
- printf(", ");
- if (i%32 == 0)
- printf("\n ");
- printf("%4d", bits[i]);
- }
- printf("\n]\n");
-
- printf("Column positions: [");
- for (size_t i=0; i<n*nodes_count; i++) {
- if (i)
- printf(", ");
- if (i%32 == 0)
- printf("\n ");
- printf("%4d", bits_transposed[i]);
- }
- printf("\n]\n");
- */
-
- /* Run iterative optimization algorithm */
- for (unsigned int n_iter=0; n_iter<maxiter; n_iter++) {
- inner_logbp(m, n, bits_count, nodes_count, bits, (uint32_t*)bits_transposed, y, Lq, Lr, n_iter, L_posteriori);
-
- /*
- float *arrs[3] = {Lq, Lr, L_posteriori};
- const char *names[3] = {"Lq", "Lr", "L_posteriori"};
- size_t lens[3] = {m*n, m*n, n};
- const size_t head_tail = 10;
- for (int j=0; j<3; j++) {
- printf("%s=[", names[j]);
- bool ellipsis = false;
- const int w = 16;
- for (size_t i=0; i<lens[j]; i++) {
- if (lens[j] > 1000 && i/w > head_tail && i/w < m*n/w-head_tail) {
- if (!ellipsis) {
- ellipsis = true;
- printf("\n ...");
- }
- continue;
- }
- if (i)
- printf(", ");
- if (i%w == 0)
- printf("\n ");
- float outf = arrs[j][i];
- char *s = outf < 0 ? "\033[91m" : (outf > 0 ? "\033[92m" : "\033[94m");
- printf("%s% 012.6g\033[38;5;240m", s, outf);
- }
- printf("\n]\n");
- }
- */
-
- for (size_t i=0; i<n; i++)
- out[i] = L_posteriori[i] <= 0.0f;
-
- for (size_t i=0; i<m; i++) {
- bool sum = 0;
- for (size_t j=0; j<bits_count; j++)
- sum ^= out[bits[i*bits_count + j]];
- if (sum)
- continue;
- }
-
- fflush(stdout);
- return n_iter;
- }
-
- fflush(stdout);
- return -1;
-}
-
-/* Perform inner ext LogBP solver */
-void inner_logbp(
- size_t m, size_t n,
- size_t bits_count, size_t nodes_count, uint32_t const bits_values[], const uint32_t nodes_values[],
- int8_t Lc[],
- float Lq[], float Lr[],
- unsigned int n_iter,
- float L_posteriori_out[]) {
-
- /*
- printf("Input data: [");
- for (size_t i=0; i<n; i++) {
- if (i)
- printf(", ");
- if (i%32 == 0)
- printf("\n ");
- printf("%4d", Lc[i]);
- }
- printf("\n]\n");
- */
-
- /* step 1 : Horizontal */
- unsigned int bits_counter = 0;
- for (size_t i=0; i<m; i++) {
- //printf("=== i=%zu\n", i);
- for (size_t p=bits_counter; p<bits_counter+bits_count; p++) {
- size_t j = bits_values[p];
- //printf("\033[38;5;240mj=%04zd ", j);
-
- float x = 1;
- if (n_iter == 0) {
- for (size_t q=bits_counter; q<bits_counter+bits_count; q++) {
- if (bits_values[q] != j) {
- //int lcv = Lc[bits_values[q]];
- //char *s = lcv < 0 ? "\033[91m" : (lcv > 0 ? "\033[92m" : "\033[94m");
- //printf("nij=%04u Lc=%s%3d\033[38;5;240m ", bits_values[q], s, lcv);
- x *= tanhf(0.5f * Lc[bits_values[q]]);
- }
- }
-
- } else {
- for (size_t q=bits_counter; q<bits_counter+bits_count; q++) {
- if (bits_values[q] != j)
- x *= tanhf(0.5f * Lq[i*n + bits_values[q]]);
- }
- }
-
- //printf("\n==== i=%03zd p=%01zd x=%08f\n", i, p-bits_counter, x);
-
- float num = 1 + x;
- float denom = 1 - x;
- if (num == 0)
- Lr[i*n + j] = -1.0f;
- else if (denom == 0)
- Lr[i*n + j] = 1.0f;
- else
- Lr[i*n + j] = logf(num/denom);
- }
-
- bits_counter += bits_count;
- }
-
- /* step 2 : Vertical */
- unsigned int nodes_counter = 0;
- for (size_t j=0; j<n; j++) {
- for (size_t p=bits_counter; p<nodes_counter+nodes_count; p++) {
- size_t i = nodes_values[p];
-
- Lq[i*n + j] = Lc[j];
-
- for (size_t q=bits_counter; q<nodes_counter+nodes_count; q++) {
- if (nodes_values[q] != i)
- Lq[i*n + j] += Lr[nodes_values[q]*n + j];
- }
- }
-
- nodes_counter += nodes_count;
- }
-
- /* LLR a posteriori */
- nodes_counter = 0;
- for (size_t j=0; j<n; j++) {
- float sum = 0;
- for (size_t k=bits_counter; k<nodes_counter+nodes_count; k++)
- sum += Lr[nodes_values[k]*n + j];
- nodes_counter += nodes_count;
-
- L_posteriori_out[j] = Lc[j] + sum;
- }
-}
-
-/* Compute the original (k) bit message from a (n) bit codeword x.
- *
- * tG: (n, k)-matrix
- * x: (n)-vector
- * out: (k)-vector
- */
-void get_message(size_t n, size_t k, int8_t *tG, int8_t *x, int8_t *out) {
-
- gausselimination(n, k, tG, x);
-
- out[k - 1] = x[k - 1];
- for (ssize_t i=k-2; i>=0; i--) {
- out[i] = x[i];
-
- uint8_t sum = 0;
- for (size_t j=i+1; j<k; j++)
- sum ^= tG[i*k + j] * out[j];
-
- out[i] = !!(out[i] - sum);
- }
-}
-
-/* Solve linear system in Z/2Z via Gauss Gauss elimination.
- *
- * A: (n, k)-matrix
- * b: (n)-vector
- */
-void gausselimination(size_t n, size_t k, int8_t *A, int8_t *b) {
- ssize_t d = k<n ? k : n;
- for (ssize_t j=0; j<d; j++) {
-
- ssize_t pivot = -1;
- for (size_t i=j; i<n; i++) {
- if (A[i*k + j]) {
- pivot = i;
- break;
- }
- }
- if (pivot == -1)
- continue;
-
- if (pivot != j) {
- for (size_t i=0; i<k; i++) {
- int8_t tmp = A[j*k + i];
- A[j*k + i] = A[pivot*k + i];
- A[pivot*k + i] = tmp;
- }
-
- int8_t tmp = b[j];
- b[j] = b[pivot];
- b[pivot] = tmp;
- }
-
- for (size_t i=j+1; i<n; i++) {
- if (A[i*k + j]) {
- for (size_t p=0; p<k; p++)
- A[i*k + p] = !!(A[i*k + p] - A[j*k + p]);
- b[i] = !!(b[i] - b[j]);
- }
- }
- }
-}
-
diff --git a/controller/fw/src/ldpc_decoder_test.py b/controller/fw/src/ldpc_decoder_test.py
deleted file mode 100644
index 3b91bba..0000000
--- a/controller/fw/src/ldpc_decoder_test.py
+++ /dev/null
@@ -1,72 +0,0 @@
-
-import pyldpc
-import scipy.sparse
-import numpy as np
-import test_decoder
-import os, sys
-import ctypes as C
-import argparse
-
-if __name__ != '__main__':
- raise RuntimeError("Please don't import this module, this is a command-line program.")
-
-parser = argparse.ArgumentParser()
-parser.add_argument('-r', '--reference', action='store_true', default=False, help='Run reference decoder instead of C implemention')
-args = parser.parse_args()
-
-lib = C.CDLL('./ldpc_decoder_test.so')
-
-n = 5*19
-nodes, bits = 17, 19
-H, G = pyldpc.make_ldpc(n, nodes, bits, systematic=False, seed=0)
-_1, bits_pos, _2 = scipy.sparse.find(H)
-_, k = G.shape
-
-st = np.random.RandomState(seed=0)
-test_data = st.randint(0, 2, k)
-d = np.dot(G, test_data) % 2
-x = (-1) ** d
-x[29:] = 0
-
-bits_pos = bits_pos.astype(np.uint32)
-x = x.astype(np.int8)
-
-lib.decode.argtypes = [C.c_size_t, C.c_size_t, C.c_size_t, C.POINTER(C.c_size_t), C.POINTER(C.c_int8), C.POINTER(C.c_int8), C.c_uint]
-lib.get_message.argtypes = [C.c_size_t, C.c_size_t, C.POINTER(C.c_int8), C.POINTER(C.c_int8), C.POINTER(C.c_int8)]
-
-if args.reference:
- ref_out = test_decoder.decode(H, x, 3)
- print('decoder output:', ref_out, flush=True)
- print('msg reconstruction:', test_decoder.get_message(G, ref_out))
- print('reference decoder: ', np.all(np.equal(test_decoder.get_message(G, ref_out), test_data)), flush=True)
- np.set_printoptions(linewidth=220)
- print(test_data)
- print(test_decoder.get_message(G, ref_out))
- print(test_decoder.get_message(G, ref_out) ^ test_data)
-
-else:
- out = np.zeros(n, dtype=np.uint8)
- # print('python data:', x, flush=True)
- print('decoder iterations:', lib.decode(n, nodes, bits,
- bits_pos.ctypes.data_as(C.POINTER(C.c_ulong)),
- x.ctypes.data_as(C.POINTER(C.c_int8)),
- out.ctypes.data_as(C.POINTER(C.c_int8)),
- 25), flush=True)
- print('decoder output:', out)
- print('msg reconstruction:', test_decoder.get_message(G, out.astype(np.int64)))
- print('decoder under test:', np.all(np.equal(test_decoder.get_message(G, out.astype(np.int64)), test_data)))
- np.set_printoptions(linewidth=220)
- print(test_data)
- print(test_decoder.get_message(G, out.astype(np.int64)))
- G = G.astype(np.int8)
- msg = np.zeros(k, dtype=np.int8)
- lib.get_message(
- n, k,
- G.ctypes.data_as(C.POINTER(C.c_int8)),
- out.astype(np.int8).ctypes.data_as(C.POINTER(C.c_int8)),
- msg.ctypes.data_as(C.POINTER(C.c_int8)))
- print(msg)
- print(msg ^ test_data)
-
-print('codeword length:', len(x))
-print('data length:', len(test_data))
diff --git a/controller/fw/src/ldpc_wrapper.cpp b/controller/fw/src/ldpc_wrapper.cpp
deleted file mode 100644
index da63343..0000000
--- a/controller/fw/src/ldpc_wrapper.cpp
+++ /dev/null
@@ -1,84 +0,0 @@
-
-#include <stdlib.h>
-#include <algorithm>
-#include <cstdint>
-#include <cmath>
-
-#include "ldpc/generic.hh"
-#include "ldpc/layered_decoder.hh"
-
-static const int DEFAULT_TRIALS = 25;
-
-struct DVB_S2_TABLE_C9
-{
- static const int M = 360;
- static const int N = 16200;
- static const int K = 13320;
- static const int LINKS_MIN_CN = 15;
- static const int LINKS_MAX_CN = 19;
- static const int LINKS_TOTAL = 49319;
- static const int DEG_MAX = 13;
- static const int DEG[];
- static const int LEN[];
- static const int POS[];
-};
-
-const int DVB_S2_TABLE_C9::DEG[] = {
- 13, 3, 0
-};
-
-const int DVB_S2_TABLE_C9::LEN[] = {
- 1, 36, 0
-};
-
-const int DVB_S2_TABLE_C9::POS[] = {
- 3, 2409, 499, 1481, 908, 559, 716, 1270, 333, 2508, 2264, 1702, 2805,
- 4, 2447, 1926,
- 5, 414, 1224,
- 6, 2114, 842,
- 7, 212, 573,
- 0, 2383, 2112,
- 1, 2286, 2348,
- 2, 545, 819,
- 3, 1264, 143,
- 4, 1701, 2258,
- 5, 964, 166,
- 6, 114, 2413,
- 7, 2243, 81,
- 0, 1245, 1581,
- 1, 775, 169,
- 2, 1696, 1104,
- 3, 1914, 2831,
- 4, 532, 1450,
- 5, 91, 974,
- 6, 497, 2228,
- 7, 2326, 1579,
- 0, 2482, 256,
- 1, 1117, 1261,
- 2, 1257, 1658,
- 3, 1478, 1225,
- 4, 2511, 980,
- 5, 2320, 2675,
- 6, 435, 1278,
- 7, 228, 503,
- 0, 1885, 2369,
- 1, 57, 483,
- 2, 838, 1050,
- 3, 1231, 1990,
- 4, 1738, 68,
- 5, 2392, 951,
- 6, 163, 645,
- 7, 2644, 1704,
-};
-
-extern "C" {
-
- int ldpc_decode(float *symbols, int trials) {
- if (trials < 0)
- trials = DEFAULT_TRIALS;
-
- LDPCDecoder<float, SumProductAlgorithm<float, SelfCorrectedUpdate<float>>, LDPC<DVB_S2_TABLE_C9>> decoder;
- return decoder.run(symbols, symbols+decoder.K, trials, 1);
- }
-
-}
diff --git a/controller/fw/src/main.c b/controller/fw/src/main.c
index 6e117f6..6547c38 100644
--- a/controller/fw/src/main.c
+++ b/controller/fw/src/main.c
@@ -190,9 +190,11 @@ static struct jtag_img_descriptor {
.img_len = 0x004000,
};
-const char fw_dump[0x4000] = {
+char fw_dump[0x4000] = {
#include "EasyMeter_Q3DA1002_V3.03_fw_dump_0xc000.h"
};
+const int fw_dump_offx = 0xc000;
+const int row2_offx = 0xf438 - fw_dump_offx;
ssize_t jt_spi_flash_read_block(void *usr, int addr, size_t len, uint8_t *out) {
/*
@@ -201,11 +203,25 @@ ssize_t jt_spi_flash_read_block(void *usr, int addr, size_t len, uint8_t *out) {
*/
for (size_t i=0; i<len; i++)
- out[i] = fw_dump[addr - 0xc000 + i];
+ out[i] = fw_dump[addr - fw_dump_offx + i];
return len;
}
+void update_image_flash_counter(void) {
+ static int flash_counter = 0;
+ flash_counter ++;
+ fw_dump[row2_offx + 0] = flash_counter/10000 + '0';
+ flash_counter %= 10000;
+ fw_dump[row2_offx + 1] = flash_counter/1000 + '0';
+ flash_counter %= 1000;
+ fw_dump[row2_offx + 2] = flash_counter/100 + '0';
+ flash_counter %= 100;
+ fw_dump[row2_offx + 3] = flash_counter/10 + '0';
+ flash_counter %= 10;
+ fw_dump[row2_offx + 4] = flash_counter + '0';
+}
+
static unsigned int measurement_errors = 0;
static struct dsss_demod_state demod_state;
static uint32_t freq_sample_ts = 0;
@@ -248,16 +264,18 @@ int main(void)
dsss_demod_init(&demod_state);
con_printf("Booted.\r\n");
- int i=0;
- while (23) {
+ con_printf("Attempting to flash meter...\r\n");
+ int flash_tries = 0;
+ while (flash_tries++ < 25) {
mspd_jtag_init();
- int rv = mspd_jtag_flash_and_reset(jtag_img.devmem_img_start, jtag_img.img_len, jt_spi_flash_read_block, &jtag_img);
- con_printf("%d flash result: %d\r\n", i, rv);
- while (!rv) {}
+ if (!mspd_jtag_flash_and_reset(jtag_img.devmem_img_start, jtag_img.img_len, jt_spi_flash_read_block, &jtag_img))
+ break;
for (int j=0; j<168*1000*5; j++)
asm volatile ("nop");
- i++;
}
+ if (flash_tries == 25)
+ con_printf("Giving up.\r\n");
+
while (23) {
if (adc_fft_buf_ready_idx != -1) {
for (int j=0; j<168*1000*2; j++)
diff --git a/controller/fw/src/mspdebug_wrapper.c b/controller/fw/src/mspdebug_wrapper.c
index aaf75ab..c30864c 100644
--- a/controller/fw/src/mspdebug_wrapper.c
+++ b/controller/fw/src/mspdebug_wrapper.c
@@ -125,10 +125,7 @@ int mspd_jtag_flash_and_reset(size_t img_start, size_t img_len, ssize_t (*read_b
return -EPIPE;
}
- /* Verify flash */
- /* FIXME
- word = jtag_read_mem(NULL, 16, addr+index );
- */
+ /* TODO: Verify flash here. */
/* Execute power on reset */
jtag_execute_puc(&sr_jtdev);
diff --git a/controller/fw/src/protocol.c b/controller/fw/src/protocol.c
index bbee5ef..4740917 100644
--- a/controller/fw/src/protocol.c
+++ b/controller/fw/src/protocol.c
@@ -10,4 +10,6 @@ void handle_dsss_received(uint8_t data[static TRANSMISSION_SYMBOLS]) {
con_printf("%3d ", x);
}
con_printf("\r\n");
+
+ update_image_flash_counter();
}
diff --git a/controller/fw/src/rscode-config.h b/controller/fw/src/rscode-config.h
new file mode 100644
index 0000000..922aca9
--- /dev/null
+++ b/controller/fw/src/rscode-config.h
@@ -0,0 +1,9 @@
+/* Config header for reed-solomon library */
+
+#ifndef __RSCODE_CONFIG_H__
+#define __RSCODE_CONFIG_H__
+
+#define NPAR 4
+#define NBITS 6
+
+#endif /* __RSCODE_CONFIG_H__ */
diff --git a/controller/fw/src/rslib.c b/controller/fw/src/rslib.c
new file mode 100644
index 0000000..ce54a6f
--- /dev/null
+++ b/controller/fw/src/rslib.c
@@ -0,0 +1,29 @@
+#include <stdint.h>
+#include <string.h>
+
+#include "rscode-config.h"
+#include <ecc.h>
+
+#include "rslib.h"
+
+void rslib_encode(int nbits, size_t msglen, char msg[static msglen], char out[msglen + NPAR]) {
+ struct rscode_driver driver;
+ rscode_init(&driver, nbits);
+ rscode_encode(&driver, (unsigned char *)msg, msglen, (unsigned char *)out);
+}
+
+int rslib_decode(int nbits, size_t msglen, char msg_inout[static msglen]) {
+ struct rscode_driver driver;
+ rscode_init(&driver, nbits);
+ return rscode_decode(&driver, (unsigned char *)msg_inout, msglen);
+}
+
+int rslib_gexp(int z, int nbits) {
+ struct rscode_driver driver;
+ rscode_init(&driver, nbits);
+ return gexp(&driver, z);
+}
+
+size_t rslib_npar() {
+ return NPAR;
+}
diff --git a/controller/fw/src/rslib.h b/controller/fw/src/rslib.h
new file mode 100644
index 0000000..3ef6d19
--- /dev/null
+++ b/controller/fw/src/rslib.h
@@ -0,0 +1,9 @@
+#ifndef __RSLIB_H__
+#define __RSLIB_H__
+
+void rslib_encode(int nbits, size_t msglen, char msg[static msglen], char out[msglen + NPAR]);
+int rslib_decode(int nbits, size_t msglen, char msg_inout[static msglen]);
+int rslib_gexp(int z, int nbits);
+size_t rslib_npar();
+
+#endif /* __RSLIB_H__ */
diff --git a/controller/fw/tools/reed_solomon.py b/controller/fw/tools/reed_solomon.py
new file mode 100644
index 0000000..9eee6be
--- /dev/null
+++ b/controller/fw/tools/reed_solomon.py
@@ -0,0 +1,81 @@
+import os, sys
+import ctypes as C
+import argparse
+import binascii
+import numpy as np
+import timeit
+import statistics
+
+lib = C.CDLL('rslib.so')
+
+lib.rslib_encode.argtypes = [C.c_int, C.c_size_t, C.POINTER(C.c_char), C.POINTER(C.c_char)]
+lib.rslib_decode.argtypes = [C.c_int, C.c_size_t, C.POINTER(C.c_char)]
+lib.rslib_gexp.argtypes = [C.c_int, C.c_int]
+lib.rslib_gexp.restype = C.c_int
+lib.rslib_decode.restype = C.c_int
+lib.rslib_npar.restype = C.c_size_t
+
+def npar():
+ return lib.rslib_npar()
+
+def encode(data: bytes, nbits=8):
+ out = C.create_string_buffer(len(data) + lib.rslib_npar())
+ lib.rslib_encode(nbits, len(data), data, out)
+ return out.raw
+
+def decode(data: bytes, nbits=8):
+ inout = C.create_string_buffer(data)
+ lib.rslib_decode(nbits, len(data), inout)
+ return inout.raw[:-lib.rslib_npar() - 1]
+
+def cmdline_func_test(args, print=lambda *args, **kwargs: None, benchmark=False):
+ st = np.random.RandomState(seed=args.seed)
+
+ lfsr = [lib.rslib_gexp(i, args.bits) for i in range(2**args.bits - 1)]
+ print('LFSR', len(set(lfsr)), lfsr)
+ assert all(0 < x < 2**args.bits for x in lfsr)
+ assert len(set(lfsr)) == 2**args.bits - 1
+
+ print('Seed', args.seed)
+ for i in range(args.repeat):
+ print(f'Run {i}')
+ test_data = bytes(st.randint(2**args.bits, size=args.message_length, dtype=np.uint8))
+ print(' Raw:', binascii.hexlify(test_data).decode())
+ encoded = encode(test_data, nbits=args.bits)
+ print(' Encoded:', binascii.hexlify(encoded).decode())
+
+ indices = st.permutation(len(encoded))
+ encoded = list(encoded)
+ for pos in indices[:args.errors]:
+ encoded[pos] = st.randint(2**args.bits)
+ encoded = bytes(encoded)
+ print(' Modified:', ''.join(f'\033[91m{b:02x}\033[0m' if pos in indices[:args.errors] else f'{b:02x}' for pos, b in enumerate(encoded)))
+
+ if benchmark:
+ rpt = 10000
+ delta = timeit.timeit('decode(encoded, nbits=args.bits)',
+ globals={'args': args, 'decode': decode, 'encoded': encoded},
+ number=rpt)/rpt
+ print(f'Decoding runtime: {delta*1e6:.3f}μs')
+ decoded = decode(encoded, nbits=args.bits)
+ print(' Decoded:', binascii.hexlify(decoded).decode())
+ print(' Delta:', binascii.hexlify(
+ bytes(x^y for x, y in zip(test_data, decoded))
+ ).decode().replace('0', '.'))
+ assert test_data == decoded
+
+if __name__ == '__main__':
+ parser = argparse.ArgumentParser()
+ cmd_parser = parser.add_subparsers(required=True)
+ test_parser = cmd_parser.add_parser('test', help='Test reed-solomon implementation')
+ test_parser.add_argument('-m', '--message-length', type=int, default=6, help='Test message (plaintext) length in bytes')
+ test_parser.add_argument('-e', '--errors', type=int, default=2, help='Number of byte errors to insert into simulation')
+ test_parser.add_argument('-r', '--repeat', type=int, default=1000, help='Repeat experiment -r times')
+ test_parser.add_argument('-b', '--bits', type=int, default=8, help='Symbol bit size')
+ test_parser.add_argument('-s', '--seed', type=int, default=0, help='Random seed')
+ test_parser.set_defaults(func=cmdline_func_test)
+ enc_parser = cmd_parser.add_parser('encode', help='RS-Encode given hex string')
+ enc_parser.add_argument('hex_str')
+ args = parser.parse_args()
+ args.func(args, print=print)
+
generated by cgit (git 2.34.1) at 2024-11-21 16:38:58 +0000