sensiron
Don't use the hardware spi.
Simply do it by hand - you need to connect data to one pin and clk to another pin (any general i/o pins will do).
Now just send appropriate commands like:
1.set/reset data bit
2.change clk pin
3.change clk pin
4.repeat 1 untill command is send
Few lines of code and it works like charm in software.
Remember that you need to wait xx ms before you can read down measurement results (time depends on measurement precision - see datasheet)