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Extract complex16_mag_squared_to_dbv_norm to utility.

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This commit is contained in:
Jared Boone 2015-08-04 12:03:10 -07:00
parent d855336985
commit efaf13d2d1
3 changed files with 10 additions and 7 deletions
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7
firmware/baseband/main.cpp
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@ -70,13 +70,6 @@
constexpr auto baseband_thread_priority = NORMALPRIO + 20; constexpr auto baseband_thread_priority = NORMALPRIO + 20;
constexpr auto rssi_thread_priority = NORMALPRIO + 10; constexpr auto rssi_thread_priority = NORMALPRIO + 10;
static float complex16_mag_squared_to_dbv_norm(const float c16_mag_squared) {
constexpr float mag2_max = -32768.0f * -32768.0f + -32768.0f * -32768.0f;
constexpr float mag2_log10_max = std::log10(mag2_max);
constexpr float mag2_to_db_factor = 20.0f / 2.0f;
return (std::log10(c16_mag_squared) - mag2_log10_max) * mag2_to_db_factor;
}
class BasebandStatsCollector { class BasebandStatsCollector {
public: public:
template<typename Callback> template<typename Callback>

8
firmware/common/utility.cpp
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@ -24,6 +24,7 @@
#include "utility.hpp" #include "utility.hpp"
#include <cstdint> #include <cstdint>
#include <cmath>
#if 0 #if 0
uint32_t gcd(const uint32_t u, const uint32_t v) { uint32_t gcd(const uint32_t u, const uint32_t v) {
@ -61,6 +62,13 @@ uint32_t gcd(const uint32_t u, const uint32_t v) {
} }
#endif #endif
float complex16_mag_squared_to_dbv_norm(const float c16_mag_squared) {
constexpr float mag2_max = -32768.0f * -32768.0f + -32768.0f * -32768.0f;
constexpr float mag2_log10_max = std::log10(mag2_max);
constexpr float mag2_to_db_factor = 20.0f / 2.0f;
return (std::log10(c16_mag_squared) - mag2_log10_max) * mag2_to_db_factor;
}
/* GCD implementation derived from recursive implementation at /* GCD implementation derived from recursive implementation at
* http://en.wikipedia.org/wiki/Binary_GCD_algorithm * http://en.wikipedia.org/wiki/Binary_GCD_algorithm
*/ */

2
firmware/common/utility.hpp
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@ -65,6 +65,8 @@ static inline void clear_m4_flag_saturation() {
#endif #endif
float complex16_mag_squared_to_dbv_norm(const float c16_mag_squared);
/* Override new/delete to use Chibi/OS heap functions */ /* Override new/delete to use Chibi/OS heap functions */
/* NOTE: Do not inline these, it doesn't work. ;-) */ /* NOTE: Do not inline these, it doesn't work. ;-) */
void* operator new(size_t size); void* operator new(size_t size);