{"id":3675,"date":"2015-09-09T11:09:00","date_gmt":"2015-09-09T16:09:00","guid":{"rendered":"http:\/\/www.serialporttool.com\/sptblog\/?p=3675"},"modified":"2015-09-09T11:09:00","modified_gmt":"2015-09-09T16:09:00","slug":"test-cmps11-i2c-mode-with-comm-operator","status":"publish","type":"post","link":"https:\/\/www.serialporttool.com\/GK\/2015\/09\/test-cmps11-i2c-mode-with-comm-operator\/","title":{"rendered":"Test CMPS11- I2C Mode with Comm Operator"},"content":{"rendered":"

Comm Operator<\/a> v4.9 supports Quick Send – I2C Panel<\/strong>. It provides a way to  communicate with I2C devices through FTDI FT232H based USB to I2C bridge.<\/p>\n

Here will show you how to test CMPS11 \u2013I2C Mode<\/a> with Comm Operator I2C Panel.<\/strong><\/p>\n

\"CMPS11<\/a><\/p>\n

CMPS11 is tilt compensated compass module of Robot Electronics<\/a>.<\/p>\n

Download Comm Operator v4.9<\/span><\/strong><\/a> beta version.<\/p>\n

Step 1: Download and install Comm Operator<\/a>.<\/p>\n

Step 2: Connect CMPS11 with your computer through FTDI FT232H based USB to I2C bridge. According to CMPS11 document<\/a>, leave the Mode pin unconnected to enter the I2C mode.<\/p>\n

\"CMPS11<\/a><\/p>\n

\"Connect<\/a><\/p>\n

Step 3: Run Comm Operator, and Open Connection \u2013> I2C Bridge<\/strong> to connect CMPS11 module.<\/p>\n

\"Comm<\/a><\/p>\n

Step 4: Click menu View \u2013> I2C Panel<\/strong> to show Quick Send \u2013 I2C Panel<\/strong>.<\/p>\n

\"Comm<\/a><\/p>\n

\"Comm<\/a><\/p>\n

Step 5: Click Scan<\/strong> button to search CMPS11 module I2C address.<\/p>\n

\"Scan<\/a><\/p>\n

If you know the device address, you can just select it from the drop-down list.<\/p>\n

\"Comm<\/a><\/p>\n

Step 6: CMPS11 module is ready to communicate in I2C mode now. <\/p>\n

According to I2C protocol and CMPS11 document<\/a>, CMPS11 has a 28-byte array of registers, organized as below.<\/p>\n

\"CMPS11<\/a><\/p>\n

Example 1:  Read the version<\/em><\/p>\n

Check Write<\/strong> and Read<\/strong>, and input data \u201d00<\/font><\/strong>\u201d in HEX format (It\u2019s the Register 0.)<\/font>, then click Send<\/strong> button to read the version value.<\/p>\n

\"Test<\/a><\/p>\n

Example 2: Read compass bearing 8-bit<\/em><\/p>\n

Check Write<\/strong> and Read<\/strong>, and input data \u201d01<\/font><\/strong>\u201d in HEX format (It\u2019s the Register 1.)<\/font>, then click Send<\/strong> button to read compass bearing 8-bit.<\/p>\n

\"Test<\/a><\/p>\n

Here compass bearing 8-bit value is 110<\/font><\/strong>.  According to 0-255 for a full circle 0-359 degree, (110\/255)*359=154.86, it is about 155<\/font><\/strong> degree.  <\/p>\n

\"CMPS11<\/a><\/p>\n

Example 3: Read compass bearing 16-bit<\/em><\/p>\n

Check Write<\/strong> and Read.<\/strong> Input data \u201d02<\/font><\/strong>\u201d in HEX format, and select Read Data Length \u201c2<\/strong><\/font>\u201d(It will read Register 2 and 3) , then click Send<\/strong> button to read compass bearing 16-bit.<\/p>\n

Here compass bearing 16-bit value is 0x0613. <\/strong><\/font>Click Calc<\/strong> button to open Calculator<\/strong> panel, input<\/font> Hex<\/strong> 0613, <\/strong>click update<\/strong> button<\/font> to get its <\/font>Decimal<\/strong> 1555. <\/strong><\/font>According to 0-3559 representing 0-359.9 degree, compass bearing is 155.5.<\/strong><\/font><\/p>\n

If CMPS11 module is moved, repeat to read Register 1, 2 and 3 the compass bearing value will be changed.<\/font><\/p>\n

\"Test<\/a><\/p>\n

Step 7: Click Edit<\/strong> button to show I2C Data Editor<\/strong>. You can edit address and data here in binary.<\/p>\n

\"Comm<\/a><\/p>\n

Step 8: Check Add to List<\/strong> when you send data to CMPS11 module, the data will be added to Send Data List<\/strong> automatically. It\u2019s pretty handy to save the list for later use. You can also Download CMPS11-I2C.sds<\/a> file, and load it in Comm Operator directly to test your CMPS11 module.<\/p>\n

\"Comm<\/a><\/p>\n