I was working with the SPI on a FRDM-KE02Z board, and was modifying the SPI_Master_Poll demo workspace by changing the clock polarity and phase bits. There is a line in the app code:
| sSPIConfig.sSettings.bClkPhase1 | = 1; |
This allows (or should allow) one to change the clock phasing as desired. However, I found that if I set that parameter to '0' (zero), the clock phase did not change. In looking through the various driver files, I found this, which is used to determine the level to set that particular bit:
| if( pConfig->sSettings.bClkPhase1) |
| { |
| | SPI_SetClockPhase(pSPI,1); |
| } |
Since the phase bit comes out of reset as a '1', commanding a '0' will never happen, because the "if" statement only does something if the commanded bit is true (or set to '1'). To fix this, I just added a following "else" options:
else
{
SPI_SetClockPhase(sSPI,0);
}
This resolved the problem. However, I noticed other, similar bit test areas with the same issue, so those need to fixed, also.
