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Code Issues Releases Wiki Activity

Move crc16 to helpers (#3780)

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This commit is contained in:
Jesse Hills
2022-09-06 12:57:21 +12:00
committed by GitHub
parent 614eb81ad7
commit c317422ed7
7 changed files with 23 additions and 58 deletions
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20
esphome/components/senseair/senseair.cpp
View File

@@ -1,4 +1,5 @@
#include "senseair.h"
#include "esphome/core/helpers.h"
#include "esphome/core/log.h"
namespace esphome {
@@ -42,7 +43,7 @@ void SenseAirComponent::update() {
return;
}
uint16_t calc_checksum = this->senseair_checksum_(response, 11);
uint16_t calc_checksum = crc16(response, 11);
uint16_t resp_checksum = (uint16_t(response[12]) << 8) | response[11];
if (resp_checksum != calc_checksum) {
ESP_LOGW(TAG, "SenseAir checksum doesn't match: 0x%02X!=0x%02X", resp_checksum, calc_checksum);
@@ -60,23 +61,6 @@ void SenseAirComponent::update() {
this->co2_sensor_->publish_state(ppm);
}
uint16_t SenseAirComponent::senseair_checksum_(uint8_t *ptr, uint8_t length) {
uint16_t crc = 0xFFFF;
uint8_t i;
while (length--) {
crc ^= *ptr++;
for (i = 0; i < 8; i++) {
if ((crc & 0x01) != 0) {
crc >>= 1;
crc ^= 0xA001;
} else {
crc >>= 1;
}
}
}
return crc;
}
void SenseAirComponent::background_calibration() {
// Responses are just echoes but must be read to clear the buffer
ESP_LOGD(TAG, "SenseAir Starting background calibration");

1
esphome/components/senseair/senseair.h
View File

@@ -23,7 +23,6 @@ class SenseAirComponent : public PollingComponent, public uart::UARTDevice {
void abc_disable();
protected:
uint16_t senseair_checksum_(uint8_t *ptr, uint8_t length);
bool senseair_write_command_(const uint8_t *command, uint8_t *response, uint8_t response_length);
sensor::Sensor *co2_sensor_{nullptr};