[GitHub] [incubator-nuttx] phfbertoleti opened a new pull request #2888: This commit enables BMP180 suport for ESP32.

[GitBox]

phfbertoleti opened a new pull request #2888:
URL: https://github.com/apache/incubator-nuttx/pull/2888


   ESP32 BMP180 support in Nuttx.
   
   ## Summary
   
   As ESP32 has 2 I2C interfaces and BMP180 is a I2C sensor, the criterias to 
use BMP180 in I2C0 or I2C1 are:
   
   1- First, bring-up routines search for BMP180 in I2C0.
      If BMP180 is found in I2C0, then /dev/press0 is created.
   2- If BMP180 cannot be registered in I2C0, bring-up routines search for it 
in I2C1.
      If BMP180 is found in I2C1, then /dev/press0 is created.
   
   It means only one BMP180 could be suported in Nuttx. In my tests I've 
observed
   that BMP180 example application doesn't seem to work with /dev/press1 BMP180 
device,
   therefore even BMP180 is found in I2C1, it'll be registered as /dev/press0 
device.
   
   ## Impact
   It doesn't impact on another modules.
   
   ## Testing
   
   After this change, BMP180 could be successfully found (/dev/press0) and read 
bu bmp180 example, as seen below:
   
   
![esp32_bmp180_nuttx_support](https://user-images.githubusercontent.com/16869652/108652000-65b34d80-7499-11eb-9998-2d2aca956a25.png)
   
   


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