Platform drivers for Mbed.

Dependents:   EVAL-CN0535-FMCZ EVAL-CN0535-FMCZ EVAL-AD568x-AD569x EVAL-AD7606 ... more

This pull request has been rejected by Analog Devices

bug-fix - SS undefined in spi_write_and_read function

Previous pull-request contained a bug missed in testing. Testing has been fixed to capture this in the future.

Simple one-line fix.

bug fix: SS was not declared in the spi_write_and_read(.. function