added check to correct i2C reading

Rocketct · Rocketct · commit d3d6bacb12cd · 2020-01-31T09:50:04.000+01:00
Added wait for ONE_SHOT bit to be cleared by the hardware for correct read of measurement
diff --git a/src/BARO.cpp b/src/BARO.cpp
@@ -57,8 +57,8 @@ float LPS22HBClass::readPressure(int units)
   // trigger one shot
   i2cWrite(LPS22HB_CTRL2_REG, 0x01);
 
-  // wait for completion
-  while ((i2cRead(LPS22HB_STATUS_REG) & 0x02) == 0) {
+  // wait for ONE_SHOT bit to be cleared by the hardware
+  while ((i2cRead(LPS22HB_CTRL2_REG) & 0x01) != 0) {
     yield();
   }
 

Original file line number	Diff line number	Diff line change
`@@ -57,8 +57,8 @@ float LPS22HBClass::readPressure(int units)`
`57`	`57`	`// trigger one shot`
`58`	`58`	`i2cWrite(LPS22HB_CTRL2_REG, 0x01);`
`59`	`59`
`60`		`- // wait for completion`
`61`		`- while ((i2cRead(LPS22HB_STATUS_REG) & 0x02) == 0) {`
	`60`	`+ // wait for ONE_SHOT bit to be cleared by the hardware`
	`61`	`+ while ((i2cRead(LPS22HB_CTRL2_REG) & 0x01) != 0) {`
`62`	`62`	`yield();`
`63`	`63`	`}`
`64`	`64`