Diff: ADXL362.cpp

Revision:

0:287361f0056d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/ADXL362.cpp	Thu Oct 29 11:14:56 2015 +0000
@@ -0,0 +1,91 @@
+#include "mbed.h"
+#include "ADXL362.h"
+ 
+// Class
+ 
+ADXL362::ADXL362(PinName mosi, PinName miso, PinName sclk, PinName cbs)
+	: SPI_m(mosi, miso, sclk) 
+	, CBS_m(cbs) {
+	CBS_m=1;
+	}
+	
+// SPI 
+
+void ADXL362::init_spi(){
+	// spi 8 bits, mode 0, 1 MHz for adxl362
+    SPI_m.format(8,0);
+    // 5 MHz, max for acc - works fine
+    SPI_m.frequency(5000000);
+}
+
+
+
+void ADXL362::init_adxl362(){
+	//uint8_t reg;
+	// reset the adxl362
+    wait_ms(200);
+    ACC_WriteReg(RESET, 0x52);
+    wait_ms(200);
+
+    // set FIFO
+    ACC_WriteReg(FIFO_CTL,0x0A);  // stream mode, AH bit
+    //ACC_WriteReg(FIFO_CTL,0x02);  // stream mode, no AH bit
+    //reg = ACC_ReadReg(FIFO_CTL);
+    //pc.printf("FIFO_CTL = 0x%X\r\n", reg);
+
+	// Not used but keep in case it is important to set FIFO parameters.
+    //ACC_WriteReg(FIFO_SAM,SAMPLE_SET * 3);   // fifo depth
+    //reg = ACC_ReadReg(FIFO_SAM);
+    //pc.printf("FIFO_SAM = 0x%X\r\n", reg);
+
+    // set adxl362 to 4g range, 25Hz
+    //ACC_WriteReg(FILTER_CTL,0x51);
+    // 2g, 25Hz
+    ACC_WriteReg(FILTER_CTL,0x11);
+    //reg = ACC_ReadReg(FILTER_CTL);
+    //printf("FILTER_CTL = 0x%X\r\n", reg);
+
+    // map adxl362 interrupts
+    //ACC_WriteReg(INTMAP1,0x01); //data ready
+    ACC_WriteReg(INTMAP1,0x04); //watermark
+    //reg = ACC_ReadReg(INTMAP1);
+    //pc.printf("INTMAP1 = 0x%X\r\n", reg);
+
+    // set adxl362 to measurement mode, ultralow noise
+    ACC_WriteReg(POWER_CTL,0x22);
+    //reg = ACC_ReadReg(POWER_CTL);
+    //pc.printf("POWER_CTL = 0x%X\r\n", reg);
+}
+
+void ADXL362::ACC_GetXYZ8(int8_t* x, int8_t* y, int8_t* z)
+{
+    CBS_m = DOWN;
+    SPI_m.write(RD_SPI);
+    SPI_m.write(0x08);
+
+    *x = SPI_m.write(0x00);
+    *y = SPI_m.write(0x00);
+    *z = SPI_m.write(0x00);
+
+    CBS_m = UP;
+}
+
+
+uint8_t ADXL362::ACC_ReadReg( uint8_t reg )
+{
+    CBS_m = DOWN;
+    SPI_m.write(RD_SPI);
+    SPI_m.write(reg);
+    uint8_t val = SPI_m.write(0x00);
+    CBS_m = UP;
+    return (val);
+}
+
+void ADXL362::ACC_WriteReg( uint8_t reg, uint8_t cmd )
+{
+    CBS_m = DOWN;
+    SPI_m.write(WR_SPI);
+    SPI_m.write(reg);
+    SPI_m.write(cmd);
+    CBS_m = UP;
+}