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https://github.com/esphome/esphome.git
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91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
#include "mpr121.h"
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#include "esphome/core/log.h"
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namespace esphome {
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namespace mpr121 {
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static const char *TAG = "mpr121";
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void MPR121Component::setup() {
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ESP_LOGCONFIG(TAG, "Setting up MPR121...");
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// soft reset device
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this->write_byte(MPR121_SOFTRESET, 0x63);
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delay(100); // NOLINT
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if (!this->write_byte(MPR121_ECR, 0x0)) {
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this->error_code_ = COMMUNICATION_FAILED;
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this->mark_failed();
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return;
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}
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// set touch sensitivity for all 12 channels
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for (auto *channel : this->channels_) {
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this->write_byte(MPR121_TOUCHTH_0 + 2 * channel->channel_,
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channel->touch_threshold_.value_or(this->touch_threshold_));
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this->write_byte(MPR121_RELEASETH_0 + 2 * channel->channel_,
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channel->release_threshold_.value_or(this->release_threshold_));
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}
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this->write_byte(MPR121_MHDR, 0x01);
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this->write_byte(MPR121_NHDR, 0x01);
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this->write_byte(MPR121_NCLR, 0x0E);
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this->write_byte(MPR121_FDLR, 0x00);
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this->write_byte(MPR121_MHDF, 0x01);
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this->write_byte(MPR121_NHDF, 0x05);
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this->write_byte(MPR121_NCLF, 0x01);
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this->write_byte(MPR121_FDLF, 0x00);
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this->write_byte(MPR121_NHDT, 0x00);
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this->write_byte(MPR121_NCLT, 0x00);
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this->write_byte(MPR121_FDLT, 0x00);
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this->write_byte(MPR121_DEBOUNCE, 0);
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// default, 16uA charge current
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this->write_byte(MPR121_CONFIG1, 0x10);
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// 0.5uS encoding, 1ms period
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this->write_byte(MPR121_CONFIG2, 0x20);
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// start with first 5 bits of baseline tracking
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this->write_byte(MPR121_ECR, 0x8F);
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}
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void MPR121Component::set_touch_debounce(uint8_t debounce) {
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uint8_t mask = debounce << 4;
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this->debounce_ &= 0x0f;
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this->debounce_ |= mask;
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}
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void MPR121Component::set_release_debounce(uint8_t debounce) {
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uint8_t mask = debounce & 0x0f;
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this->debounce_ &= 0xf0;
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this->debounce_ |= mask;
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};
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void MPR121Component::dump_config() {
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ESP_LOGCONFIG(TAG, "MPR121:");
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LOG_I2C_DEVICE(this);
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switch (this->error_code_) {
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case COMMUNICATION_FAILED:
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ESP_LOGE(TAG, "Communication with MPR121 failed!");
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break;
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case WRONG_CHIP_STATE:
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ESP_LOGE(TAG, "MPR121 has wrong default value for CONFIG2?");
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break;
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case NONE:
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default:
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break;
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}
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}
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void MPR121Component::loop() {
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uint16_t val = 0;
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this->read_byte_16(MPR121_TOUCHSTATUS_L, &val);
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// Flip order
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uint8_t lsb = val >> 8;
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uint8_t msb = val;
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val = (uint16_t(msb) << 8) | lsb;
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for (auto *channel : this->channels_)
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channel->process(val);
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}
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} // namespace mpr121
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} // namespace esphome
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