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Fix ESP32 rotary encoder (#834)

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* Fix ESP32 rotary encoder

Fixes https://github.com/esphome/issues/issues/672

* Update rotary_encoder.cpp

* Lint
This commit is contained in:
Otto Winter 2019-11-05 22:26:06 +01:00 committed by GitHub
parent 85c46becdf
commit 3fdb68cba8
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1 changed files with 7 additions and 1 deletions
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8
esphome/components/rotary_encoder/rotary_encoder.cpp
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@ -32,7 +32,13 @@ static const uint16_t STATE_DECREMENT_COUNTER_1 = 0x1000;
// Bit 2&3 (0x0C) encodes state S0-S3
// Bit 4 (0x10) encodes clockwise/counter-clockwise rotation
static const uint16_t STATE_LOOKUP_TABLE[32] = {
// Only apply if DRAM_ATTR exists on this platform (exists on ESP32, not on ESP8266)
#ifndef DRAM_ATTR
#define DRAM_ATTR
#endif
// array needs to be placed in .dram1 for ESP32
// otherwise it will automatically go into flash, and cause cache disabled issues
static const uint16_t DRAM_ATTR STATE_LOOKUP_TABLE[32] = {
// act state S0 in CCW direction
STATE_CCW | STATE_S0, // 0x00: stay here
STATE_CW | STATE_S1 | STATE_INCREMENT_COUNTER_1, // 0x01: goto CW+S1 and increment counter (dir change)