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Temperature scaling changes for HackRF r9 (MAX2839) (#1561)

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Mark Thompson 2023-11-06 13:56:09 -06:00 • committed by GitHub
parent 6784fe72dd
commit 68f960e4e7
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9 changed files with 19 additions and 17 deletions
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9
firmware/application/hw/max2839.cpp
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@ -351,7 +351,7 @@ void MAX2839::set_rx_buff_vcm(const size_t v) {
flush();
}
reg_t MAX2839::temp_sense() {
int8_t MAX2839::temp_sense() {
if (!_map.r.rx_top_2.ts_en) {
_map.r.rx_top_2.ts_en = 1;
flush_one(Register::RX_TOP_2);
@ -365,15 +365,14 @@ reg_t MAX2839::temp_sense() {
halPolledDelay(ticks_for_temperature_sense_adc_conversion);
/*
* Things look very similar to MAX2837, so this probably works, but the
* MAX2839 data sheet does not describe the TEMP_SENSE register contents.
* Conversion to degrees C determined by testing - does not match data sheet.
*/
const auto value = read(Register::TEMP_SENSE);
reg_t value = read(Register::TEMP_SENSE) & 0x1F;
_map.r.rx_top_2.ts_adc_trigger = 0;
flush_one(Register::RX_TOP_2);
return value;
return value * 4.31 - 75; // reg value is 0 to 31; possible return range is -75 C to 58 C
}
} // namespace max2839