diff options
| -rw-r--r-- | docs/library/esp32.rst | 17 | ||||
| -rw-r--r-- | ports/esp32/esp32_rmt.c | 3 |
2 files changed, 15 insertions, 5 deletions
diff --git a/docs/library/esp32.rst b/docs/library/esp32.rst index 796dbbbc5..422329bf1 100644 --- a/docs/library/esp32.rst +++ b/docs/library/esp32.rst @@ -193,7 +193,7 @@ numbers specified in ``write_pulses`` are multiplied by the resolution to define the pulses. ``clock_div`` is an 8-bit divider (0-255) and each pulse can be defined by -multiplying the resolution by a 15-bit (0-32,768) number. There are eight +multiplying the resolution by a 15-bit (1-``PULSE_MAX``) number. There are eight channels (0-7) and each can have a different clock divider. So, in the example above, the 80MHz clock is divided by 8. Thus the @@ -264,10 +264,10 @@ For more details see Espressif's `ESP-IDF RMT documentation. **Mode 3:** *duration* and *data* are lists or tuples of equal length, specifying individual durations and the output level for each. - Durations are in integer units of the channel resolution (as described - above), between 1 and 32767 units. Output levels are any value that can - be converted to a boolean, with ``True`` representing high voltage and - ``False`` representing low. + Durations are in integer units of the channel resolution (as + described above), between 1 and ``PULSE_MAX`` units. Output levels + are any value that can be converted to a boolean, with ``True`` + representing high voltage and ``False`` representing low. If transmission of an earlier sequence is in progress then this method will block until that transmission is complete before beginning the new sequence. @@ -290,6 +290,13 @@ For more details see Espressif's `ESP-IDF RMT documentation. Passing in no argument will not change the channel. This function returns the current channel number. +Constants +--------- + +.. data:: RMT.PULSE_MAX + + Maximum integer that can be set for a pulse duration. + Ultra-Low-Power co-processor ---------------------------- diff --git a/ports/esp32/esp32_rmt.c b/ports/esp32/esp32_rmt.c index 14caffdda..5d53018f4 100644 --- a/ports/esp32/esp32_rmt.c +++ b/ports/esp32/esp32_rmt.c @@ -368,6 +368,9 @@ STATIC const mp_rom_map_elem_t esp32_rmt_locals_dict_table[] = { // Class methods { MP_ROM_QSTR(MP_QSTR_source_freq), MP_ROM_PTR(&esp32_rmt_source_obj) }, + + // Constants + { MP_ROM_QSTR(MP_QSTR_PULSE_MAX), MP_ROM_INT(32767) }, }; STATIC MP_DEFINE_CONST_DICT(esp32_rmt_locals_dict, esp32_rmt_locals_dict_table); |