From 61dab030e9ff9f249c393632f8a37b86a0c5ef89 Mon Sep 17 00:00:00 2001
From: Dryw Wade <dryw.wade@sparkfun.com>
Date: Tue, 4 Jun 2024 15:51:34 -0600
Subject: [PATCH] Allow any SPI port

---
 src/SparkFun_BMI270_Arduino_Library.cpp | 19 ++++++++++---------
 src/SparkFun_BMI270_Arduino_Library.h   |  3 ++-
 2 files changed, 12 insertions(+), 10 deletions(-)

diff --git a/src/SparkFun_BMI270_Arduino_Library.cpp b/src/SparkFun_BMI270_Arduino_Library.cpp
index 952442f..178b42e 100644
--- a/src/SparkFun_BMI270_Arduino_Library.cpp
+++ b/src/SparkFun_BMI270_Arduino_Library.cpp
@@ -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;
@@ -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;
@@ -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;
 }
@@ -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;
 }
diff --git a/src/SparkFun_BMI270_Arduino_Library.h b/src/SparkFun_BMI270_Arduino_Library.h
index 505f89c..2a0e628 100644
--- a/src/SparkFun_BMI270_Arduino_Library.h
+++ b/src/SparkFun_BMI270_Arduino_Library.h
@@ -79,6 +79,7 @@ struct BMI270_InterfaceData
     // SPI settings
     uint8_t spiCSPin;
     uint32_t spiClockFrequency;
+    SPIClass* spiPort;
 };
 
 // Struct to hold acceleration data
@@ -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();