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Fix HX711

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This commit is contained in:
Otto Winter 2019-06-02 14:05:04 +02:00
parent f31c1480f3
commit 92f3ae64d6
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GPG Key ID: DB66C0BE6013F97E
1 changed files with 11 additions and 2 deletions
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13
esphome/components/hx711/hx711.cpp
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@ -1,5 +1,6 @@
#include "hx711.h"
#include "esphome/core/log.h"
#include "esphome/core/helpers.h"
namespace esphome {
namespace hx711 {
@ -10,6 +11,7 @@ void HX711Sensor::setup() {
ESP_LOGCONFIG(TAG, "Setting up HX711 '%s'...", this->name_.c_str());
this->sck_pin_->setup();
this->dout_pin_->setup();
this->sck_pin_->digital_write(false);
// Read sensor once without publishing to set the gain
this->read_sensor_(nullptr);
@ -39,10 +41,11 @@ bool HX711Sensor::read_sensor_(uint32_t *result) {
this->status_clear_warning();
uint32_t data = 0;
disable_interrupts();
for (uint8_t i = 0; i < 24; i++) {
this->sck_pin_->digital_write(true);
delayMicroseconds(1);
data |= uint32_t(this->dout_pin_->digital_read()) << (24 - i);
data |= uint32_t(this->dout_pin_->digital_read()) << (23 - i);
this->sck_pin_->digital_write(false);
delayMicroseconds(1);
}
@ -50,10 +53,16 @@ bool HX711Sensor::read_sensor_(uint32_t *result) {
// Cycle clock pin for gain setting
for (uint8_t i = 0; i < this->gain_; i++) {
this->sck_pin_->digital_write(true);
delayMicroseconds(1);
this->sck_pin_->digital_write(false);
delayMicroseconds(1);
}
enable_interrupts();
if (data & 0x800000ULL) {
data |= 0xFF000000ULL;
}
data ^= 0x800000;
if (result != nullptr)
*result = data;
return true;