Merge pull request #881 from dhylands/elapsed
Added pyb.elapsed_millis and pyb.elapsed_micros
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853708738e
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@ -188,15 +188,9 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_0(pyb_sync_obj, pyb_sync);
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/// \function millis()
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/// Returns the number of milliseconds since the board was last reset.
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///
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/// Note that this may return a negative number. This allows you to always
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/// do:
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/// start = pyb.millis()
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/// ...do some operation...
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/// elapsed = pyb.millis() - start
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///
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/// and as long as the time of your operation is less than 24 days, you'll
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/// always get the right answer and not have to worry about whether pyb.millis()
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/// wraps around.
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/// The result is always a micropython smallint (31-bit signed number), so
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/// after 2^30 milliseconds (about 12.4 days) this will start to return
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/// negative numbers.
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STATIC mp_obj_t pyb_millis(void) {
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// We want to "cast" the 32 bit unsigned into a small-int. This means
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// copying the MSB down 1 bit (extending the sign down), which is
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@ -205,18 +199,29 @@ STATIC mp_obj_t pyb_millis(void) {
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(pyb_millis_obj, pyb_millis);
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/// \function elapsed_millis(start)
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/// Returns the number of milliseconds which have elapsed since `start`.
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///
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/// This function takes care of counter wrap, and always returns a positive
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/// number. This means it can be used to measure periods upto about 12.4 days.
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///
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/// Example:
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/// start = pyb.millis()
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/// while pyb.elapsed_millis(start) < 1000:
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/// # Perform some operation
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STATIC mp_obj_t pyb_elapsed_millis(mp_obj_t start) {
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uint32_t startMillis = mp_obj_get_int(start);
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uint32_t currMillis = HAL_GetTick();
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return MP_OBJ_NEW_SMALL_INT((currMillis - startMillis) & 0x3fffffff);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_elapsed_millis_obj, pyb_elapsed_millis);
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/// \function micros()
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/// Returns the number of microseconds since the board was last reset.
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///
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/// Note that this may return a negative number. This allows you to always
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/// do:
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/// start = pyb.micros()
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/// ...do some operation...
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/// elapsed = pyb.micros() - start
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///
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/// and as long as the time of your operation is less than 35 minutes, you'll
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/// always get the right answer and not have to worry about whether pyb.micros()
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/// wraps around.
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/// The result is always a micropython smallint (31-bit signed number), so
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/// after 2^30 microseconds (about 17.8 minutes) this will start to return
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/// negative numbers.
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STATIC mp_obj_t pyb_micros(void) {
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// We want to "cast" the 32 bit unsigned into a small-int. This means
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// copying the MSB down 1 bit (extending the sign down), which is
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@ -225,6 +230,23 @@ STATIC mp_obj_t pyb_micros(void) {
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(pyb_micros_obj, pyb_micros);
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/// \function elapsed_micros(start)
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/// Returns the number of microseconds which have elapsed since `start`.
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///
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/// This function takes care of counter wrap, and always returns a positive
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/// number. This means it can be used to measure periods upto about 17.8 minutes.
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///
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/// Example:
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/// start = pyb.micros()
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/// while pyb.elapsed_micros(start) < 1000:
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/// # Perform some operation
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STATIC mp_obj_t pyb_elapsed_micros(mp_obj_t start) {
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uint32_t startMicros = mp_obj_get_int(start);
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uint32_t currMicros = sys_tick_get_microseconds();
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return MP_OBJ_NEW_SMALL_INT((currMicros - startMicros) & 0x3fffffff);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_elapsed_micros_obj, pyb_elapsed_micros);
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/// \function delay(ms)
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/// Delay for the given number of milliseconds.
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STATIC mp_obj_t pyb_delay(mp_obj_t ms_in) {
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@ -376,7 +398,9 @@ STATIC const mp_map_elem_t pyb_module_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_USB_VCP), (mp_obj_t)&pyb_usb_vcp_type },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_millis), (mp_obj_t)&pyb_millis_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_elapsed_millis), (mp_obj_t)&pyb_elapsed_millis_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_micros), (mp_obj_t)&pyb_micros_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_elapsed_micros), (mp_obj_t)&pyb_elapsed_micros_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_delay), (mp_obj_t)&pyb_delay_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_udelay), (mp_obj_t)&pyb_udelay_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_sync), (mp_obj_t)&pyb_sync_obj },
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@ -68,6 +68,8 @@ Q(/sd)
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Q(/sd/lib)
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Q(millis)
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Q(micros)
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Q(elapsed_millis)
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Q(elapsed_micros)
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// for file class
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Q(seek)
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@ -157,11 +157,66 @@ STATIC MP_DEFINE_CONST_FUN_OBJ_0(pyb_sync_obj, pyb_sync);
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/// \function millis()
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/// Returns the number of milliseconds since the board was last reset.
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///
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/// The result is always a micropython smallint (31-bit signed number), so
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/// after 2^30 milliseconds (about 12.4 days) this will start to return
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/// negative numbers.
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STATIC mp_obj_t pyb_millis(void) {
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return mp_obj_new_int(HAL_GetTick());
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// We want to "cast" the 32 bit unsigned into a small-int. This means
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// copying the MSB down 1 bit (extending the sign down), which is
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// equivalent to just using the MP_OBJ_NEW_SMALL_INT macro.
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return MP_OBJ_NEW_SMALL_INT(HAL_GetTick());
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(pyb_millis_obj, pyb_millis);
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/// \function elapsed_millis(start)
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/// Returns the number of milliseconds which have elapsed since `start`.
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///
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/// This function takes care of counter wrap, and always returns a positive
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/// number. This means it can be used to measure periods upto about 12.4 days.
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///
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/// Example:
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/// start = pyb.millis()
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/// while pyb.elapsed_millis(start) < 1000:
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/// # Perform some operation
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STATIC mp_obj_t pyb_elapsed_millis(mp_obj_t start) {
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uint32_t startMillis = mp_obj_get_int(start);
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uint32_t currMillis = HAL_GetTick();
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return MP_OBJ_NEW_SMALL_INT((currMillis - startMillis) & 0x3fffffff);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_elapsed_millis_obj, pyb_elapsed_millis);
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/// \function micros()
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/// Returns the number of microseconds since the board was last reset.
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///
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/// The result is always a micropython smallint (31-bit signed number), so
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/// after 2^30 microseconds (about 17.8 minutes) this will start to return
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/// negative numbers.
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STATIC mp_obj_t pyb_micros(void) {
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// We want to "cast" the 32 bit unsigned into a small-int. This means
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// copying the MSB down 1 bit (extending the sign down), which is
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// equivalent to just using the MP_OBJ_NEW_SMALL_INT macro.
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return MP_OBJ_NEW_SMALL_INT(micros());
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_0(pyb_micros_obj, pyb_micros);
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/// \function elapsed_micros(start)
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/// Returns the number of microseconds which have elapsed since `start`.
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///
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/// This function takes care of counter wrap, and always returns a positive
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/// number. This means it can be used to measure periods upto about 17.8 minutes.
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///
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/// Example:
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/// start = pyb.micros()
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/// while pyb.elapsed_micros(start) < 1000:
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/// # Perform some operation
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STATIC mp_obj_t pyb_elapsed_micros(mp_obj_t start) {
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uint32_t startMicros = mp_obj_get_int(start);
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uint32_t currMicros = micros();
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return MP_OBJ_NEW_SMALL_INT((currMicros - startMicros) & 0x3fffffff);
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}
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STATIC MP_DEFINE_CONST_FUN_OBJ_1(pyb_elapsed_micros_obj, pyb_elapsed_micros);
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/// \function delay(ms)
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/// Delay for the given number of milliseconds.
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STATIC mp_obj_t pyb_delay(mp_obj_t ms_in) {
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@ -248,6 +303,9 @@ STATIC const mp_map_elem_t pyb_module_globals_table[] = {
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{ MP_OBJ_NEW_QSTR(MP_QSTR_hid), (mp_obj_t)&pyb_hid_send_report_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_millis), (mp_obj_t)&pyb_millis_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_elapsed_millis), (mp_obj_t)&pyb_elapsed_millis_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_micros), (mp_obj_t)&pyb_micros_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_elapsed_micros), (mp_obj_t)&pyb_elapsed_micros_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_delay), (mp_obj_t)&pyb_delay_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_udelay), (mp_obj_t)&pyb_udelay_obj },
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{ MP_OBJ_NEW_QSTR(MP_QSTR_sync), (mp_obj_t)&pyb_sync_obj },
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@ -50,6 +50,9 @@ Q(enable_irq)
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Q(usb_mode)
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Q(have_cdc)
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Q(millis)
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Q(micros)
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Q(elapsed_millis)
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Q(elapsed_micros)
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Q(udelay)
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Q(UART)
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@ -8,7 +8,7 @@
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#include MICROPY_HAL_H
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uint32_t HAL_GetTick(void) {
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return micros();
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return millis();
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}
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void HAL_Delay(uint32_t Delay) {
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