firmware/edu16_sbc
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This commit is contained in:
ThePetrovich 2026-05-07 23:21:11 +08:00
parent 70798b6bf7
commit 3e77d34ccc
10 changed files with 669 additions and 146 deletions
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24
sbc_fw/utils.cpp
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@ -32,26 +32,4 @@ uint16_t calculate_crc16_xmodem(uint8_t *data, uint16_t len)
}
return crc;
}
int16_t adc_to_temperature_c(uint16_t adc_value)
{
// MCP9700: 500 mV at 0°C, 10 mV per degree, vref = 3.0V
// Result in 0.1°C units
return (int16_t)((adc_value * ADC_VREF_MV / ADC_RESOLUTION - TEMP_SENSOR_OFFSET_MV));
}
uint16_t adc_to_voltage_mv(uint16_t adc_value) { return (uint16_t)(adc_value * VOLTAGE_MV_PER_STEP); }
uint16_t read_adc_oversampled(uint8_t pin, uint8_t samples)
{
uint32_t sum = 0;
uint8_t shift = ((samples == 64) ? 3 : (samples == 16) ? 2 : (samples == 4) ? 1 : 0);
for (uint8_t i = 0; i < samples; i++) {
sum += analogRead(pin);
}
return (uint16_t)(sum >> shift);
}
}