gomaomao/DIY-Multiprotocol-TX-Module
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moved register definitions to a different file and created higher level functions for using them; added preliminary support for 868 MHz mode, not fully working yet

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This commit is contained in:
Tomer Abramovich
2020-01-23 22:25:00 +02:00
parent 77bf17967d
commit 6f9740f03f
3 changed files with 310 additions and 102 deletions
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143
Multiprotocol/SX1276_SPI.ino
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@@ -1,4 +1,5 @@
#ifdef SX1276_INSTALLED
#include "iface_sx1276.h"
void SX1276_WriteReg(uint8_t address, uint8_t data)
{
@@ -12,19 +13,21 @@ void SX1276_WriteReg(uint8_t address, uint8_t data)
uint8_t SX1276_ReadReg(uint8_t address)
{
SPI_CSN_off;
SPI_Write(address & 0b01111111);
SPI_Write(address & 0x7F);
uint8_t result = SPI_Read();
SPI_CSN_on;
return result;
}
void SX1276_WriteRegisterMulti(uint8_t address, const uint8_t data[], uint8_t length)
void SX1276_WriteRegisterMulti(uint8_t address, const uint8_t* data, uint8_t length)
{
SPI_CSN_off;
SPI_Write(address | 0x80); // MSB 1 = write
for(uint8_t i = 0; i < length; i++)
SPI_Write(data[i]);
SPI_CSN_on;
}
@@ -35,4 +38,140 @@ uint8_t SX1276_Reset()
return 0;
}
void SX1276_SetFrequency(uint32_t frequency)
{
uint32_t f = frequency / 61;
uint8_t data[3];
data[0] = (f & (0xFF << 16)) >> 16;
data[1] = (f & (0xFF << 8)) >> 8;
data[2] = f & 0xFF;
SX1276_WriteRegisterMulti(SX1276_06_FRFMSB, data, 3);
}
void SX1276_SetMode(bool lora, bool low_freq_mode, uint8_t mode)
{
uint8_t data = 0x00;
if(lora)
{
data = data | (1 << 7);
data = data & ~(1 << 6);
}
else
{
data = data & ~(1 << 7);
data = data | (1 << 6);
}
if(low_freq_mode)
data = data | (1 << 3);
data = data | mode;
SX1276_WriteReg(SX1276_01_OPMODE, data);
}
void SX1276_SetDetectOptimize(bool auto_if, uint8_t detect_optimize)
{
uint8_t data = SX1276_ReadReg(SX1276_31_DETECTOPTIMIZE);
data = (data & 0b01111000) | detect_optimize;
data = data | (auto_if << 7);
SX1276_WriteReg(SX1276_31_DETECTOPTIMIZE, data);
}
void SX1276_ConfigModem1(uint8_t bandwidth, uint8_t coding_rate, bool implicit_header_mode)
{
uint8_t data = 0x00;
data = data | (bandwidth << 4);
data = data | (coding_rate << 1);
data = data | implicit_header_mode;
SX1276_WriteReg(SX1276_1D_MODEMCONFIG1, data);
}
void SX1276_ConfigModem2(uint8_t spreading_factor, bool tx_continuous_mode, bool rx_payload_crc_on)
{
uint8_t data = SX1276_ReadReg(SX1276_1E_MODEMCONFIG2);
data = data & 0b11; // preserve the last 2 bits
data = data | (spreading_factor << 4);
data = data | (tx_continuous_mode << 3);
data = data | (rx_payload_crc_on << 2);
SX1276_WriteReg(SX1276_1E_MODEMCONFIG2, data);
}
void SX1276_ConfigModem3(bool low_data_rate_optimize, bool agc_auto_on)
{
uint8_t data = SX1276_ReadReg(SX1276_26_MODEMCONFIG3);
data = data & 0b11; // preserve the last 2 bits
data = data | (low_data_rate_optimize << 3);
data = data | (agc_auto_on << 2);
SX1276_WriteReg(SX1276_26_MODEMCONFIG3, data);
}
void SX1276_SetPreambleLength(uint16_t length)
{
uint8_t data[2];
data[0] = (length >> 8) & 0xFF; // high byte
data[1] = length & 0xFF; // low byte
SX1276_WriteRegisterMulti(SX1276_20_PREAMBLEMSB, data, 2);
}
void SX1276_SetDetectionThreshold(uint8_t threshold)
{
SX1276_WriteReg(SX1276_37_DETECTIONTHRESHOLD, threshold);
}
void SX1276_SetLna(uint8_t gain, bool high_freq_lna_boost)
{
uint8_t data = SX1276_ReadReg(SX1276_0C_LNA);
data = data & 0b100; // preserve the third bit
data = data | (gain << 5);
if(high_freq_lna_boost)
data = data | 0b11;
SX1276_WriteReg(SX1276_0C_LNA, data);
}
void SX1276_SetHopPeriod(uint8_t freq_hop_period)
{
SX1276_WriteReg(SX1276_24_HOPPERIOD, freq_hop_period);
}
void SX1276_SetPaDac(bool on)
{
uint8_t data = SX1276_ReadReg(SX1276_4D_PADAC);
data = data & 0b11111000; // preserve the upper 5 bits
if(on)
data = data | 0x07;
else
data = data | 0x04;
SX1276_WriteReg(SX1276_4D_PADAC, data);
}
void SX1276_SetPaConfig(bool pa_boost_pin, uint8_t max_power, uint8_t output_power)
{
uint8_t data = 0x00;
data = data | (pa_boost_pin << 7);
data = data | (max_power << 4);
data = data | output_power;
SX1276_WriteReg(SX1276_09_PACONFIG, data);
}
void SX1276_WritePayloadToFifo(uint8_t* payload, uint8_t length)
{
SX1276_WriteReg(SX1276_22_PAYLOAD_LENGTH, length);
SX1276_WriteReg(SX1276_0E_FIFOTXBASEADDR, 0x00);
SX1276_WriteReg(SX1276_0D_FIFOADDRPTR, 0x00);
SX1276_WriteRegisterMulti(SX1276_00_FIFO, payload, length);
}
#endif