implement gettimeofday() in InfiniTime

in particular, this makes std::chrono::system_time::now() work correctly
InfiniTimeOrg · Nov 9, 2024 · ed63972 · ed63972
1 parent f7c87a7
commit ed63972
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Showing 2 changed files with 25 additions and 6 deletions.
diff --git a/src/CMakeLists.txt b/src/CMakeLists.txt
@@ -919,7 +919,7 @@ target_compile_options(${EXECUTABLE_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_FILE_NAME}.map"
+        LINK_FLAGS "-Wl,--wrap=gettimeofday -mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_NAME}
@@ -954,7 +954,7 @@ target_compile_options(${EXECUTABLE_MCUBOOT_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_MCUBOOT_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_MCUBOOT_FILE_NAME}.map"
+        LINK_FLAGS "-Wl,--wrap=gettimeofday -mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_MCUBOOT_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_MCUBOOT_NAME}
@@ -997,7 +997,7 @@ target_compile_options(${EXECUTABLE_RECOVERY_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_RECOVERY_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_RECOVERY_FILE_NAME}.map"
+        LINK_FLAGS "-Wl,--wrap=gettimeofday -mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_RECOVERY_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_RECOVERY_NAME}
@@ -1029,7 +1029,7 @@ target_compile_options(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} PUBLIC
 
 set_target_properties(${EXECUTABLE_RECOVERY_MCUBOOT_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_GRAPHICS_FILE_NAME}.map"
+        LINK_FLAGS "-Wl,--wrap=gettimeofday -mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_GRAPHICS_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_RECOVERY_MCUBOOT_NAME}
@@ -1072,7 +1072,7 @@ add_dependencies(${EXECUTABLE_RECOVERYLOADER_NAME} ${EXECUTABLE_RECOVERY_MCUBOOT
 
 set_target_properties(${EXECUTABLE_RECOVERYLOADER_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_RECOVERYLOADER_FILE_NAME}.map"
+        LINK_FLAGS "-Wl,--wrap=gettimeofday -mthumb -mabi=aapcs -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_RECOVERYLOADER_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_RECOVERYLOADER_NAME}
@@ -1107,7 +1107,7 @@ add_dependencies(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} ${EXECUTABLE_RECOVERY
 
 set_target_properties(${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME} PROPERTIES
         SUFFIX ".out"
-        LINK_FLAGS "-mthumb -mabi=aapcs -std=gnu++98 -std=c99 -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_MCUBOOT_RECOVERYLOADER_FILE_NAME}.map"
+        LINK_FLAGS "-Wl,--wrap=gettimeofday -mthumb -mabi=aapcs -std=gnu++98 -std=c99 -L ${NRF5_SDK_PATH}/modules/nrfx/mdk -T${NRF5_LINKER_SCRIPT_MCUBOOT} -mcpu=cortex-m4 -mfloat-abi=hard -mfpu=fpv4-sp-d16 -Wl,--gc-sections -Wl,--print-memory-usage --specs=nano.specs -lc -lnosys -lm -Wl,-Map=${EXECUTABLE_MCUBOOT_RECOVERYLOADER_FILE_NAME}.map"
         )
 
 add_custom_command(TARGET ${EXECUTABLE_MCUBOOT_RECOVERYLOADER_NAME}

diff --git a/src/main.cpp b/src/main.cpp
@@ -47,6 +47,8 @@
 #include "touchhandler/TouchHandler.h"
 #include "buttonhandler/ButtonHandler.h"
 
+#include <sys/time.h>
+
 #if NRF_LOG_ENABLED
   #include "logging/NrfLogger.h"
 Pinetime::Logging::NrfLogger logger;
@@ -109,6 +111,23 @@ Pinetime::Controllers::TouchHandler touchHandler;
 Pinetime::Controllers::ButtonHandler buttonHandler;
 Pinetime::Controllers::BrightnessController brightnessController {};
 
+extern "C" {
+int __wrap_gettimeofday(struct timeval *tv,
+                        struct timezone *tz)
+{
+  using namespace std::chrono;
+  auto currentDayTime(round<microseconds>(dateTimeController.CurrentDateTime()));
+  auto usAfterEpoch(currentDayTime.time_since_epoch().count());
+  tv->tv_sec = usAfterEpoch / 1000000;
+  tv->tv_usec = usAfterEpoch % 1000000;
+  tz->tz_minuteswest = dateTimeController.TzOffset() + dateTimeController.DstOffset();
+  tz->tz_minuteswest *= -60;
+  tz->tz_dsttime = -1;
+  errno = 0;
+  return 0;
+}
+}
+
 Pinetime::Applications::DisplayApp displayApp(lcd,
                                               touchPanel,
                                               batteryController,