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Fix progmem extraction

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This commit is contained in:
Reed Nightingale 2020-02-11 22:59:44 -08:00
parent 4a27962a5b
commit 70a1025603
1 changed files with 28 additions and 14 deletions
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42
bands.cpp
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@ -10,7 +10,7 @@ struct Band_t {
uint32_t min;
uint32_t max;
uint8_t band_meters;
const char name[3];//Two characters + null terminator. Fixed width so we don't need to build separate pointers
char name[3];//Two characters + null terminator. Fixed width so we don't need to build separate pointers
};
const char UNKNOWN_BAND_NAME [] PROGMEM = "??";
@ -33,10 +33,12 @@ constexpr Band_t bands [] PROGMEM {
};
constexpr uint8_t NUM_BANDS = sizeof(bands)/sizeof(bands[0]);
int8_t findBandIndexFromBand(const uint8_t band)
int8_t findBandIndexFromBand(const uint8_t target_band)
{
Band_t band;
for(uint8_t i = 0; i < NUM_BANDS; ++i){
if(band == bands[i].band_meters){
memcpy_P(&band,&bands[i],sizeof(band));
if(target_band == band.band_meters){
return i;
}
}
@ -46,9 +48,11 @@ int8_t findBandIndexFromBand(const uint8_t band)
int8_t findBandIndexFromFreq(uint32_t frequency)
{
Band_t band;
for(uint8_t i = 0; i < NUM_BANDS; ++i){
if(frequency <= bands[i].max){
if(bands[i].min <= frequency){
memcpy_P(&band,&bands[i],sizeof(band));
if(frequency <= band.max){
if(band.min <= frequency){
return i;
}
//No bands overlap, and they are ordered in strictly increasing frequency, so we need search no further
@ -68,7 +72,9 @@ void getBandString(const unsigned long frequency,
strncpy_P(band_string_out,UNKNOWN_BAND_NAME,max_string_length);
}
else{
strncpy_P(band_string_out,bands[band_index].name,max_string_length);
Band_t band;
memcpy_P(&band,&bands[band_index],sizeof(band));
strncpy_P(band_string_out,band.name,max_string_length);
}
}
@ -86,28 +92,36 @@ uint32_t getFreqInBand(const uint32_t frequency,
if(-1 == current_band_index){
//We're not in a known band - just go to the center of the target band
return ((bands[target_band_index].max - bands[target_band_index].min)/2/100)*100;//truncated 100Hz
Band_t band;
memcpy_P(&band,&bands[target_band_index],sizeof(band));
return ((band.max - band.min)/2/100)*100;//truncated 100Hz
}
else{
//We're in a known band. Match the relative position in the target band.
const uint32_t range_current = bands[current_band_index].max - bands[current_band_index].min;
const uint32_t range_target = bands[target_band_index].max - bands[target_band_index].min;
return (((frequency - bands[current_band_index].min) * range_target / range_current + bands[target_band_index].min)/100)*100;//truncated 100Hz
Band_t current_band;
memcpy_P(&current_band,&bands[current_band_index],sizeof(current_band));
Band_t target_band;
memcpy_P(&target_band,&bands[target_band_index],sizeof(target_band));
const uint32_t range_current = current_band.max - current_band.min;
const uint32_t range_target = target_band.max - target_band.min;
return (((frequency - current_band.min) * range_target / range_current + target_band.min)/100)*100;//truncated 100Hz
}
}
bool isFreqInBand(const uint32_t frequency,
const uint8_t band)
const uint8_t check_band)
{
int8_t band_index = findBandIndexFromBand(band);
int8_t band_index = findBandIndexFromBand(check_band);
if(-1 == band_index){
//Unknown band - can't be in it
return false;
}
if( (frequency <= bands[band_index].max)
&& (bands[band_index].min <= frequency)){
Band_t band;
memcpy_P(&band,&bands[band_index],sizeof(band));
if( (frequency <= band.max)
&& (band.min <= frequency)){
return true;
}