Merge branch 'felipe-iar-lib-add-crc'

Author: Felipe Torrezan

.github/workflows/iar.yaml

@@ -78,7 +78,7 @@ jobs:
       run: ctest --test-dir build -C Release
     - name: CTest - Unit testing Release With Debug Info configuration
       run: ctest --test-dir build -C RelWithDebInfo
-    - name: CTest - Unit testing Minimal Size With Debug Info configuration
+    - name: CTest - Unit testing Minimal Size configuration
       run: ctest --test-dir build -C MinSizeRel
 
   deploy:

lib/CMakeLists.txt

@@ -2,6 +2,8 @@ add_library(util)
 
 # Tests
 add_executable(hello_test)
+add_executable(crc16_test)
+add_executable(crc32_test)
 add_executable(bm_search_test)
 add_executable(linear_search_test)
 
@@ -13,12 +15,20 @@ target_include_directories(util PUBLIC
 # Sources: library
 target_sources(util PRIVATE
   bm_search.c
+  crc16.c
+  crc32.c
   linear_search.c
 )
 # Sources: unit tests
 target_sources(hello_test PRIVATE
   hello_test.c
 )
+target_sources(crc16_test PRIVATE
+  crc16_test.c
+)
+target_sources(crc32_test PRIVATE
+  crc32_test.c
+)
 target_sources(bm_search_test PRIVATE
   bm_search_test.c
 )
@@ -30,20 +40,24 @@ target_sources(linear_search_test PRIVATE
 set_target_properties(
   util
   PROPERTIES
-    COMPILE_OPTIONS "--cpu=cortex-m4;--dlib_config=full;-e"
+    COMPILE_OPTIONS "--cpu=cortex-m4;--dlib_config=full;-e;--no_wrap_diagnostics"
 )
 # Properties: unit testing
 set_target_properties(
   bm_search_test
+  crc16_test
+  crc32_test
   linear_search_test
   hello_test
   PROPERTIES
-    COMPILE_OPTIONS "--cpu=cortex-m4;--dlib_config=full;-e"
+    COMPILE_OPTIONS "--cpu=cortex-m4;--dlib_config=full;-e;--no_wrap_diagnostics"
     LINK_LIBRARIES util
     LINK_OPTIONS "--cpu=cortex-m4;--semihosting;--redirect=_Printf=_PrintfFullNoMb"
 )
 
 # Register unit tests
 iar_cspysim(hello_test)
+iar_cspysim(crc16_test)
+iar_cspysim(crc32_test)
 iar_cspysim(bm_search_test)
 iar_cspysim(linear_search_test)

lib/crc16.c

@@ -0,0 +1,33 @@
+/*
+  Copyright (c) 2020-2025, IAR Systems AB.
+  SPDX-License-Identifier: MIT
+*/
+
+/*!
+  \file    crc16.c
+  \brief   Software implementation for CRC16
+  \version 20250929
+*/
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define CRC16_POLY 0x1021
+
+uint16_t crc16(const char * data)
+{
+  uint16_t crc = 0xFFFF; 
+
+  while (*data)
+  {
+    crc ^= ((uint8_t)(*data++) << 8); 
+    for (int i = 0; i < 8; i++)
+    {
+      if (crc & 0x8000)
+        crc = (crc << 1) ^ CRC16_POLY;
+      else
+        crc <<= 1;
+    }
+  }
+  return crc;
+}

lib/crc16_test.c

@@ -0,0 +1,29 @@
+/*
+  Copyright (c) 2020-2025, IAR Systems AB.
+  SPDX-License-Identifier: MIT
+*/
+
+/*!
+  \file    crc16_test.c
+  \brief   CRC16 test module
+  \version 20250929
+*/
+
+#include <errno.h>
+#include "acutest.h"
+#include "util.h"
+
+
+void crc16_test()
+{
+  TEST_CASE("The quick brown fox");
+  char * message = "The quick brown fox jumps over the lazy dog";
+  uint16_t result = crc16(message);
+  TEST_CHECK(0x8FDD == result);
+}
+
+TEST_LIST= {
+  {"CRC16", crc16_test},
+
+  {NULL, NULL}
+};

lib/crc32.c

@@ -0,0 +1,33 @@
+/*
+  Copyright (c) 2020-2025, IAR Systems AB.
+  SPDX-License-Identifier: MIT
+*/
+
+/*!
+  \file    crc32.c
+  \brief   Software implementation for CRC32
+  \version 20250929
+*/
+
+#include <stddef.h>
+#include <stdint.h>
+
+#define CRC32_POLY 0xEDB88320
+
+uint32_t crc32(const char * data)
+{
+  uint32_t crc = 0xFFFFFFFF;
+
+  while (*data)
+  {
+    crc ^= (uint8_t)(*data++);
+    for (int i = 0; i < 8; i++)
+    {
+      if (crc & 1)
+        crc = (crc >> 1) ^ CRC32_POLY;
+      else
+        crc >>= 1;
+    }
+  }
+  return ~crc;
+}

lib/crc32_test.c

@@ -0,0 +1,28 @@
+/*
+  Copyright (c) 2020-2025, IAR Systems AB.
+  SPDX-License-Identifier: MIT
+*/
+
+/*!
+  \file    crc32_test.c
+  \brief   CRC32 test module
+  \version 20250929
+*/
+
+#include <errno.h>
+#include "acutest.h"
+#include "util.h"
+
+void crc32_test()
+{
+  TEST_CASE("The quick brown fox");
+  char * message = "The quick brown fox jumps over the lazy dog";
+  int32_t result = crc32(message);
+  TEST_CHECK(0x414fa339 == result);
+}
+
+TEST_LIST= {
+  {"CRC32", crc32_test},
+
+  {NULL, NULL}
+};

lib/util.h

@@ -18,5 +18,7 @@ typedef struct data_s {
 
 const uint8_t* bm_search(const uint8_t *text, const uint8_t *pattern);
 uint32_t linear_search(uint32_t x, const data_t *data);
+uint16_t crc16(const char * data);
+uint32_t crc32(const char * data);
 
-#endif /* __TEST_CONFIG__ */
+#endif /* __UTIL_H__ */