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Code Issues Releases Wiki Activity

mpr121: Add GPIO support (#6776)

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Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
This commit is contained in:
polyfloyd
2024-05-23 23:08:28 +02:00
committed by GitHub
parent aed0593793
commit c2d67659f3
14 changed files with 332 additions and 206 deletions
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87
esphome/components/mpr121/mpr121.cpp
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@@ -1,6 +1,9 @@
#include "mpr121.h"
#include "esphome/core/log.h"
#include <cstdint>
#include "esphome/core/hal.h"
#include "esphome/core/log.h"
namespace esphome {
namespace mpr121 {
@@ -20,10 +23,7 @@ void MPR121Component::setup() {
// set touch sensitivity for all 12 channels
for (auto *channel : this->channels_) {
this->write_byte(MPR121_TOUCHTH_0 + 2 * channel->channel_,
channel->touch_threshold_.value_or(this->touch_threshold_));
this->write_byte(MPR121_RELEASETH_0 + 2 * channel->channel_,
channel->release_threshold_.value_or(this->release_threshold_));
channel->setup();
}
this->write_byte(MPR121_MHDR, 0x01);
this->write_byte(MPR121_NHDR, 0x01);
@@ -44,8 +44,15 @@ void MPR121Component::setup() {
this->write_byte(MPR121_CONFIG1, 0x10);
// 0.5uS encoding, 1ms period
this->write_byte(MPR121_CONFIG2, 0x20);
// start with first 5 bits of baseline tracking
this->write_byte(MPR121_ECR, 0x8F);
// Write the Electrode Configuration Register
// * Highest 2 bits is "Calibration Lock", which we set to a value corresponding to 5 bits.
// * The 2 bits below is "Proximity Enable" and are left at 0.
// * The 4 least significant bits control how many electrodes are enabled. Electrodes are enabled
// as a range, starting at 0 up to the highest channel index used.
this->write_byte(MPR121_ECR, 0x80 | (this->max_touch_channel_ + 1));
this->flush_gpio_();
}
void MPR121Component::set_touch_debounce(uint8_t debounce) {
@@ -86,6 +93,72 @@ void MPR121Component::loop() {
for (auto *channel : this->channels_)
channel->process(val);
this->read_byte(MPR121_GPIODATA, &this->gpio_input_);
}
bool MPR121Component::digital_read(uint8_t ionum) { return (this->gpio_input_ & (1 << ionum)) != 0; }
void MPR121Component::digital_write(uint8_t ionum, bool value) {
if (value) {
this->gpio_output_ |= (1 << ionum);
} else {
this->gpio_output_ &= ~(1 << ionum);
}
this->flush_gpio_();
}
void MPR121Component::pin_mode(uint8_t ionum, gpio::Flags flags) {
this->gpio_enable_ |= (1 << ionum);
if (flags & gpio::FLAG_INPUT) {
this->gpio_direction_ &= ~(1 << ionum);
} else if (flags & gpio::FLAG_OUTPUT) {
this->gpio_direction_ |= 1 << ionum;
}
this->flush_gpio_();
}
bool MPR121Component::flush_gpio_() {
if (this->is_failed()) {
return false;
}
// TODO: The CTL registers can configure internal pullup/pulldown resistors.
this->write_byte(MPR121_GPIOCTL0, 0x00);
this->write_byte(MPR121_GPIOCTL1, 0x00);
this->write_byte(MPR121_GPIOEN, this->gpio_enable_);
this->write_byte(MPR121_GPIODIR, this->gpio_direction_);
if (!this->write_byte(MPR121_GPIODATA, this->gpio_output_)) {
this->status_set_warning();
return false;
}
this->status_clear_warning();
return true;
}
void MPR121GPIOPin::setup() { this->pin_mode(this->flags_); }
void MPR121GPIOPin::pin_mode(gpio::Flags flags) {
assert(this->pin_ >= 4);
this->parent_->pin_mode(this->pin_ - 4, flags);
}
bool MPR121GPIOPin::digital_read() {
assert(this->pin_ >= 4);
return this->parent_->digital_read(this->pin_ - 4) != this->inverted_;
}
void MPR121GPIOPin::digital_write(bool value) {
assert(this->pin_ >= 4);
this->parent_->digital_write(this->pin_ - 4, value != this->inverted_);
}
std::string MPR121GPIOPin::dump_summary() const {
char buffer[32];
snprintf(buffer, sizeof(buffer), "ELE%u on MPR121", this->pin_);
return buffer;
}
} // namespace mpr121