Diff: drivers/ADNS5090/ADNS5090.cpp

Revision:

0:21019d94ad33

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/drivers/ADNS5090/ADNS5090.cpp	Sat Mar 21 21:31:29 2015 +0000
@@ -0,0 +1,78 @@
+#include "ADNS5090.h"
+
+ADNS5090::ADNS5090(PinName mosi_pin, PinName miso_pin, PinName sclk_pin, PinName ncs_pin, float pxPerMM_) :
+    spi(mosi_pin, miso_pin, sclk_pin),
+    ncs(ncs_pin),
+    dx_px(0), dy_px(0),
+    pxPerMM(pxPerMM_)
+{
+    ncs = 1;
+    spi.format(8,3);
+    spi.frequency(1000000);    
+    reset();
+}
+
+
+bool ADNS5090::updateMotion()
+{
+    bool ret = false;    
+    dx_px = 0;
+    dy_px = 0;    
+    
+    ncs = 0;    
+    spi.write(ADNS5090_MOTION_ST_REG);    
+    
+    if(0x80 & spi.write(0))
+    {
+        spi.write(ADNS5090_MOTION_BURST_REG);
+        dx_px = (int8_t)spi.write(0);
+        dy_px = (int8_t)spi.write(0);
+        sq = (uint8_t)spi.write(0);
+        ret = true;
+    }
+    ncs = 1;    
+    return ret;
+}
+
+float ADNS5090::dx()
+{
+    return dx_px/pxPerMM;
+}
+
+float ADNS5090::dy()
+{
+    return dy_px/pxPerMM;
+}
+
+void ADNS5090::reset()
+{
+    ncs = 0;
+    spi.write(ADNS5090_WRITE_VAL |
+        ADNS5090_RESET_REG);
+    spi.write(ADNS5090_RESET_VAL);
+    ncs = 1;
+}
+
+void ADNS5090::powerDown()
+{
+    ncs = 0;
+    spi.write(ADNS5090_WRITE_VAL |
+        ADNS5090_MOUSE_CTRL_REG);
+    spi.write(ADNS5090_POWERDOWN_VAL);
+    ncs = 1;
+}
+
+void ADNS5090::setDPI()
+{    
+    ncs = 0;
+    spi.write(ADNS5090_WRITE_VAL|
+        ADNS5090_MOUSE_CTRL_REG);
+    spi.write(0x24);
+    ncs = 1;
+    
+    ncs = 0;
+    spi.write(ADNS5090_WRITE_VAL|
+        0x21);        
+    spi.write(0x10);
+    ncs = 1; 
+}
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