Add SPI frequency override in begin()

Author: oclyke

examples/Arduino/Example2_Advanced/Example2_Advanced.ino

@@ -17,6 +17,7 @@
 #define SERIAL_PORT Serial
 
 #define SPI_PORT SPI    // Your desired SPI port.       Used only when "USE_SPI" is defined
+#define SPI_FREQ 10000000// You can override the default SPI frequency
 #define CS_PIN 2        // Which pin you connect CS to. Used only when "USE_SPI" is defined
 
 #define WIRE_PORT Wire  // Your desired Wire port.      Used when "USE_SPI" is not defined
@@ -47,7 +48,7 @@ void setup() {
   while( !initialized ){
 
 #ifdef USE_SPI
-    myICM.begin( CS_PIN, SPI_PORT ); 
+    myICM.begin( CS_PIN, SPI_PORT, SPI_FREQ ); // Here we are using the user-defined SPI_FREQ as the clock speed of the SPI bus 
 #else
     myICM.begin( WIRE_PORT, AD0_VAL );
 #endif

src/ICM_20948.cpp

@@ -485,16 +485,17 @@ ICM_20948_Status_e ICM_20948_I2C::writeMag( uint8_t reg, uint8_t* pdata, uint8_t
 
 
 // SPI
-SPISettings ICM_20948_SPI_DEFAULT_SETTINGS(ICM_20948_SPI_DEFAULT_FREQ, ICM_20948_SPI_DEFAULT_ORDER, ICM_20948_SPI_DEFAULT_MODE);
+
+// SPISettings ICM_20948_SPI_DEFAULT_SETTINGS(ICM_20948_SPI_DEFAULT_FREQ, ICM_20948_SPI_DEFAULT_ORDER, ICM_20948_SPI_DEFAULT_MODE);
 
 ICM_20948_SPI::ICM_20948_SPI(){
 
 }
 
-ICM_20948_Status_e ICM_20948_SPI::begin( uint8_t csPin, SPIClass &spiPort){
+ICM_20948_Status_e ICM_20948_SPI::begin( uint8_t csPin, SPIClass &spiPort, uint32_t SPIFreq ){
     // Associate
     _spi = &spiPort;
-    _spisettings = ICM_20948_SPI_DEFAULT_SETTINGS;
+    _spisettings = SPISettings(SPIFreq, ICM_20948_SPI_DEFAULT_ORDER, ICM_20948_SPI_DEFAULT_MODE);
 	_cs = csPin;
 
 

src/ICM_20948.h

@@ -144,7 +144,7 @@ class ICM_20948_SPI : public ICM_20948 {
 
     ICM_20948_SPI(); // Constructor
 
-    ICM_20948_Status_e begin( uint8_t csPin, SPIClass &spiPort = SPI );
+    ICM_20948_Status_e begin( uint8_t csPin, SPIClass &spiPort = SPI, uint32_t SPIFreq = ICM_20948_SPI_DEFAULT_FREQ );
 };