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Merged
merged 1 commit into from
Jun 26, 2024
Merged

Allow any SPI port #6

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19 changes: 10 additions & 9 deletions src/SparkFun_BMI270_Arduino_Library.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -76,7 +76,7 @@ int8_t BMI270::beginI2C(uint8_t address, TwoWire& wirePort)
/// @param csPin Chip select pin of sensor
/// @param clockFrequency SPI clock frequency
/// @return Error code (0 is success, negative is failure, positive is warning)
int8_t BMI270::beginSPI(uint8_t csPin, uint32_t clockFrequency)
int8_t BMI270::beginSPI(uint8_t csPin, uint32_t clockFrequency, SPIClass& spiPort)
{
// Set up chip select pin
interfaceData.spiCSPin = csPin;
Expand All @@ -85,6 +85,7 @@ int8_t BMI270::beginSPI(uint8_t csPin, uint32_t clockFrequency)

// Set desired clock frequency
interfaceData.spiClockFrequency = clockFrequency;
interfaceData.spiPort = &spiPort;

// Set interface
sensor.intf = BMI2_SPI_INTF;
Expand Down Expand Up @@ -1223,19 +1224,19 @@ BMI2_INTF_RETURN_TYPE BMI270::readRegistersI2C(uint8_t regAddress, uint8_t* data
BMI2_INTF_RETURN_TYPE BMI270::readRegistersSPI(uint8_t regAddress, uint8_t* dataBuffer, uint32_t numBytes, BMI270_InterfaceData* interfaceData)
{
// Start transmission
SPI.beginTransaction(SPISettings(interfaceData->spiClockFrequency, MSBFIRST, SPI_MODE0));
interfaceData->spiPort->beginTransaction(SPISettings(interfaceData->spiClockFrequency, MSBFIRST, SPI_MODE0));
digitalWrite(interfaceData->spiCSPin, LOW);
SPI.transfer(regAddress | 0x80);
interfaceData->spiPort->transfer(regAddress | 0x80);

// Read all requested bytes
for(uint32_t i = 0; i < numBytes; i++)
{
dataBuffer[i] = SPI.transfer(0);
dataBuffer[i] = interfaceData->spiPort->transfer(0);
}

// End transmission
digitalWrite(interfaceData->spiCSPin, HIGH);
SPI.endTransaction();
interfaceData->spiPort->endTransaction();

return BMI2_OK;
}
Expand Down Expand Up @@ -1309,21 +1310,21 @@ BMI2_INTF_RETURN_TYPE BMI270::writeRegistersI2C(uint8_t regAddress, const uint8_
BMI2_INTF_RETURN_TYPE BMI270::writeRegistersSPI(uint8_t regAddress, const uint8_t* dataBuffer, uint32_t numBytes, BMI270_InterfaceData* interfaceData)
{
// Begin transmission
SPI.beginTransaction(SPISettings(interfaceData->spiClockFrequency, MSBFIRST, SPI_MODE0));
interfaceData->spiPort->beginTransaction(SPISettings(interfaceData->spiClockFrequency, MSBFIRST, SPI_MODE0));
digitalWrite(interfaceData->spiCSPin, LOW);

// Write the address
SPI.transfer(regAddress);
interfaceData->spiPort->transfer(regAddress);

// Write all the data
for(uint32_t i = 0; i < numBytes; i++)
{
SPI.transfer(dataBuffer[i]);
interfaceData->spiPort->transfer(dataBuffer[i]);
}

// End transmission
digitalWrite(interfaceData->spiCSPin, HIGH);
SPI.endTransaction();
interfaceData->spiPort->endTransaction();

return BMI2_OK;
}
Expand Down
3 changes: 2 additions & 1 deletion src/SparkFun_BMI270_Arduino_Library.h
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Original file line number Diff line number Diff line change
Expand Up @@ -79,6 +79,7 @@ struct BMI270_InterfaceData
// SPI settings
uint8_t spiCSPin;
uint32_t spiClockFrequency;
SPIClass* spiPort;
};

// Struct to hold acceleration data
Expand Down Expand Up @@ -148,7 +149,7 @@ class BMI270

// Sensor initialization, must specify communication interface
int8_t beginI2C(uint8_t address = BMI2_I2C_PRIM_ADDR, TwoWire& wirePort = Wire);
int8_t beginSPI(uint8_t csPin, uint32_t clockFrequency = 100000);
int8_t beginSPI(uint8_t csPin, uint32_t clockFrequency = 100000, SPIClass& spiPort = SPI);

// Sensor control
int8_t reset();
Expand Down