Do software SPI read from a register using shiftin()

Question

How to read from a register using software SPI, presumably shiftin()?

It works using the builtin SPI library + hardware SPI.

I seem to be able to write but not read using manual shiftin()/shiftout(). I need to do this because I need a version of this to work on a device that doesn't have hardware SPI. I always read out 0x00000000 using shiftin() as below, but the SPI hardware/library works as expected.

(yes, I've double checked the pin numbers). LIS_MISO_PIN = 12.

 // this works (write):
 SPI.transfer(WriteAddr);
 SPI.transfer(Data);
 // this works (write):
 shiftOut(LIS_MOSI_PIN, LIS_SCK_PIN, MSBFIRST, WriteAddr);
 shiftOut(LIS_MOSI_PIN, LIS_SCK_PIN, MSBFIRST, Data);
 // this works (read):
 SPI.transfer(Reg | 0x80);
 *input = SPI.transfer(0x00);
 // does NOT work, as well as various permutations:
 shiftOut(LIS_MOSI_PIN, LIS_SCK_PIN, MSBFIRST, Reg | 0x80);
 *input = shiftIn(LIS_MISO_PIN, LIS_SCK_PIN, MSBFIRST);

• dandavis: SPI reading is done one byte at a time, how would shiftIn handle that?
• Edgar Bonet: Is your LIS_MISO_PIN set as INPUT? Does your device use SPI mode 0?
• Mikael Patel: How about using SoftSPI? ShiftIn/Out does not work. github.com/MajenkoLibraries/SoftSPI
• next-hack: How do you declare and initialize "input" ? This smells of uninitialized pointer...
• sa_leinad: Could you please add a link to the software SPI that you have used.