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esp32/esp32_rmt: Add RMT.PULSE_MAX constant.

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If you have a variable frequency and pulse width, and you want to optimize
pulse resolution, then you must do a calculation beforehand to ensure you
normalize the array to keep all list values within bound.  That calculation
requires RMT.source_freq(), RMT.clock_div(), and this 32767 constant.

Signed-off-by: Mark Blakeney <mark.blakeney@bullet-systems.net>
This commit is contained in:
Mark Blakeney
2023-10-31 14:24:43 +10:00
committed by Damien George
parent fbb7c32040
commit 2888c5b230
2 changed files with 15 additions and 5 deletions
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ports/esp32/esp32_rmt.c
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@@ -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);