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Code Issues Releases Activity

reduce FM radio compile size if only 1 band used

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OneOfEleven
2023-10-30 12:31:36 +00:00
parent c03ac606f1
commit 9a7e03ced5
7 changed files with 58 additions and 44 deletions
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84
driver/bk1080.c
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@ -104,30 +104,37 @@ uint16_t BK1080_freq_upper;
uint16_t BK1080_BaseFrequency;
uint16_t BK1080_FrequencyDeviation;
void BK1080_Init(uint16_t Frequency, bool bDoScan)
void BK1080_Init(const uint16_t frequency, const bool initialise)
{
unsigned int i;
BK1080_freq_lower = 0xffff;
BK1080_freq_upper = 0;
for (i = 0; i < ARRAY_SIZE(FM_RADIO_FREQ_BAND_TABLE); i++)
{
const unsigned int lower = FM_RADIO_FREQ_BAND_TABLE[i].lower;
const unsigned int upper = FM_RADIO_FREQ_BAND_TABLE[i].upper;
if (BK1080_freq_lower > lower)
BK1080_freq_lower = lower;
if (BK1080_freq_lower > upper)
BK1080_freq_lower = upper;
if (BK1080_freq_upper < lower)
BK1080_freq_upper = lower;
if (BK1080_freq_upper < upper)
BK1080_freq_upper = upper;
}
#if defined(ENABLE_FMRADIO_64_108)
// determine the lower and upper frequency limits
BK1080_freq_lower = 0xffff;
BK1080_freq_upper = 0;
for (i = 0; i < ARRAY_SIZE(FM_RADIO_FREQ_BAND_TABLE); i++)
{
const unsigned int lower = FM_RADIO_FREQ_BAND_TABLE[i].lower;
const unsigned int upper = FM_RADIO_FREQ_BAND_TABLE[i].upper;
if (bDoScan)
{
if (BK1080_freq_lower > lower)
BK1080_freq_lower = lower;
if (BK1080_freq_lower > upper)
BK1080_freq_lower = upper;
if (BK1080_freq_upper < lower)
BK1080_freq_upper = lower;
if (BK1080_freq_upper < upper)
BK1080_freq_upper = upper;
}
#else
BK1080_freq_lower = FM_RADIO_FREQ_BAND_TABLE[0].lower;
BK1080_freq_upper = FM_RADIO_FREQ_BAND_TABLE[0].upper;
#endif
if (initialise)
{ // init and enable the chip
GPIO_ClearBit(&GPIOB->DATA, GPIOB_PIN_BK1080);
if (!is_init)
@ -149,10 +156,11 @@ void BK1080_Init(uint16_t Frequency, bool bDoScan)
BK1080_WriteRegister(BK1080_REG_02_POWER_CONFIGURATION, (1u << 9) | (1u << 0));
}
BK1080_SetFrequency(Frequency);
BK1080_SetFrequency(frequency);
}
else
{
{ // disable the chip
BK1080_WriteRegister(BK1080_REG_02_POWER_CONFIGURATION, (1u << 9) | (1u << 6) | (1u << 0)); // 0x0241); // 0000 0010 0100 0001
GPIO_SetBit(&GPIOB->DATA, GPIOB_PIN_BK1080);
}
@ -181,30 +189,32 @@ void BK1080_WriteRegister(BK1080_Register_t Register, uint16_t Value)
void BK1080_Mute(bool Mute)
{
uint16_t val = (1u << 9) | (1u << 0);
if (Mute)
val |= 1u << 14;
BK1080_WriteRegister(BK1080_REG_02_POWER_CONFIGURATION, val);
BK1080_WriteRegister(BK1080_REG_02_POWER_CONFIGURATION, (1u << 9) | (1u << 0) | (Mute ? 1u << 14 : 0u));
}
void BK1080_SetFrequency(uint16_t Frequency)
{
uint16_t band;
uint16_t channel;
uint16_t band = 0;
// determine which band to use
for (band = 0; band < ARRAY_SIZE(FM_RADIO_FREQ_BAND_TABLE); band++)
if (Frequency >= FM_RADIO_FREQ_BAND_TABLE[band].lower && Frequency < FM_RADIO_FREQ_BAND_TABLE[band].upper)
break;
// #if (ARRAY_SIZE(FM_RADIO_FREQ_BAND_TABLE) > 1) // compiler doesn't like this :(
#if defined(ENABLE_FMRADIO_64_108)
// determine which band to use
for (band = 0; band < ARRAY_SIZE(FM_RADIO_FREQ_BAND_TABLE); band++)
if (Frequency >= FM_RADIO_FREQ_BAND_TABLE[band].lower && Frequency < FM_RADIO_FREQ_BAND_TABLE[band].upper)
break;
if (band >= ARRAY_SIZE(FM_RADIO_FREQ_BAND_TABLE))
{
Frequency = BK1080_freq_lower;
// return;
}
BK1080_WriteRegister(BK1080_REG_05_SYSTEM_CONFIGURATION2, (SEEK_THRESHOLD << 8) | (band << 6) | (CHAN_SPACING << 4) | (VOLUME << 0));
#endif
if (band >= ARRAY_SIZE(FM_RADIO_FREQ_BAND_TABLE))
return;
channel = Frequency - FM_RADIO_FREQ_BAND_TABLE[band].lower; // 100kHz channel spacing
BK1080_WriteRegister(BK1080_REG_05_SYSTEM_CONFIGURATION2, (SEEK_THRESHOLD << 8) | (band << 6) | (CHAN_SPACING << 4) | (VOLUME << 0));
BK1080_WriteRegister(BK1080_REG_03_CHANNEL, channel);
BK1080_WriteRegister(BK1080_REG_03_CHANNEL, channel | (1u << 15));
}

2
driver/bk1080.h
View File

@ -27,7 +27,7 @@ extern uint16_t BK1080_freq_upper;
extern uint16_t BK1080_BaseFrequency;
extern uint16_t BK1080_FrequencyDeviation;
void BK1080_Init(uint16_t Frequency, bool bDoScan);
void BK1080_Init(const uint16_t frequency, const bool initialise);
uint16_t BK1080_ReadRegister(BK1080_Register_t Register);
void BK1080_WriteRegister(BK1080_Register_t Register, uint16_t Value);
void BK1080_Mute(bool Mute);