Diff: ADXL375_spi.cpp

Revision:

0:6bf9c1ce7bdc

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ADXL375_spi.cpp	Tue Mar 17 12:30:36 2020 +0000
@@ -0,0 +1,160 @@
+#include "ADXL375_spi.h"
+
+ADXL375_spi :: ADXL375_spi(SPI &userSPI, PinName userPIN) : cs(userPIN){
+    /*
+    if(LOW_HIGH == ALT_ADDRESS_LOW){
+        ADXL375_I2C_READ = ADXL375_I2C_LOW_READ;
+        ADXL375_I2C_WRITE = ADXL375_I2C_LOW_WRITE;
+        ADXL375_I2C_ADDRESS = ADXL375_I2C_LOW_ADDRESS;
+    }
+    else if(LOW_HIGH == ALT_ADDRESS_HIGH){
+        ADXL375_I2C_READ = ADXL375_I2C_HIGH_READ;
+        ADXL375_I2C_WRITE = ADXL375_I2C_HIGH_WRITE;
+        ADXL375_I2C_ADDRESS = ADXL375_I2C_HIGH_ADDRESS;
+    }
+    */
+    /*
+    i2c = &userI2C;
+    i2c -> frequency(400000);
+    */
+    spi = &userSPI;
+    
+    spi -> format(8, 3);
+    spi -> frequency(5000000);
+    cs = 0;
+    spi -> write(0x00);
+    spi -> write(0x00);
+    cs = 1;
+    
+    /*
+    char tx[2];
+    tx[0] = ADXL375_BW_RATE_REG;
+    tx[1] = ADXL375_3200HZ;
+    i2c -> write(ADXL375_I2C_WRITE, tx, 2);
+    */
+    cs = 0;
+    spi -> write(ADXL375_BW_RATE_REG & 0x3F);
+    spi -> write(ADXL375_3200HZ);
+    cs = 1;
+    /*
+    char rx[2];
+    rx[0] = ADXL375_DATA_FORMAT_REG;
+    rx[1] = 0x0B;
+    i2c -> write(ADXL375_I2C_WRITE, rx, 2);
+    */
+    cs = 0;
+    spi -> write(ADXL375_DATA_FORMAT_REG & 0x3F);
+    spi -> write(0x0B);
+    cs = 1;
+    
+    /*
+    char x[2];
+    x[0] = ADXL375_OFSX_REG ;
+    x[1] = 0xFE;
+    i2c -> write(ADXL375_I2C_WRITE, x, 2);
+    char y[2];
+    y[0] = ADXL375_OFSY_REG ;
+    y[1] = 0xFE;
+    i2c -> write(ADXL375_I2C_WRITE, y, 2);
+    char z[2];
+    z[0] = ADXL375_OFSZ_REG ;
+    z[1] = 0x00;
+    i2c -> write(ADXL375_I2C_WRITE, z, 2);
+    */
+    cs = 0;
+    spi -> write(ADXL375_OFSX_REG & 0x3F);
+    spi -> write(0xFE);
+    cs = 1;
+    
+    cs = 0;
+    spi -> write(ADXL375_OFSY_REG & 0x3F);
+    spi -> write(0xFE);
+    cs = 1;
+    
+    cs = 0;
+    spi -> write(ADXL375_OFSZ_REG & 0x3F);
+    spi -> write(0x00);
+    cs = 1;
+    
+    singleByteWrite(ADXL375_POWER_CTL_REG, 0x08);
+    
+    offset_x = offset_y = offset_z = 0.0f;
+    
+}
+
+char ADXL375_spi :: singleByteRead(char address){
+    //char tx = address;
+    char output;
+    /*
+    i2c -> write(ADXL375_I2C_WRITE, &tx, 1);
+    i2c -> read(ADXL375_I2C_READ, &output, 1);
+    */
+    cs = 0;
+    spi -> write(address | 0x80 & 0xBF);
+    output = spi -> write(0x00);
+    cs = 1;
+    
+    return output;
+}
+
+void ADXL375_spi :: singleByteWrite(char address, char data){
+    /*
+    char tx[2];
+    tx[0] = address;
+    tx[1] = data;
+    i2c -> write(ADXL375_I2C_WRITE, tx, 2);
+    */
+    cs = 0;
+    spi -> write(address & 0x3F);
+    spi -> write(data);
+    cs = 1;
+}
+
+void ADXL375_spi :: multiByteRead(char address, char* output, int size){
+    /*
+    i2c -> write(ADXL375_I2C_WRITE, &address, 1);
+    i2c -> read(ADXL375_I2C_READ, output, size);
+    */
+    cs = 0;
+    spi -> write(address | 0xC0);
+    for(int i = 0; i < size; i ++){
+        output[i] = spi -> write(0x00);
+    }
+    cs = 1;
+}
+
+void ADXL375_spi :: getOutput(float* output){
+    char buffer[6];
+    short int data[3];
+    multiByteRead(ADXL375_DATAX0_REG, buffer, 6);
+    data[0] = (int)buffer[1] << 8 | (int)buffer[0];
+    data[1] = (int)buffer[3] << 8 | (int)buffer[2];
+    data[2] = (int)buffer[5] << 8 | (int)buffer[4];
+    
+    output[0] = (float)data[0] / 20.0f - offset_x;
+    output[1] = (float)data[1] / 20.0f - offset_y;
+    output[2] = (float)data[2] / 20.0f - offset_z;
+}
+
+int ADXL375_spi :: whoAmI(){
+    char who_am_i = singleByteRead(ADXL375_DEVID_REG);
+    if(who_am_i == 0xE5){
+        return 1;
+    }
+    else{
+        return -1;
+    }
+}
+
+void ADXL375_spi :: offset(float x, float y, float z){
+    offset_x = x;
+    offset_y = y;
+    offset_z = z;
+}
+
+void ADXL375_spi :: setDataRate(char rate){
+    char buff = singleByteRead(ADXL375_BW_RATE_REG);
+    buff &= 0x10;
+    buff |= rate;
+    singleByteWrite(ADXL375_BW_RATE_REG, buff);
+}
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