#include <nitro/spi.h>
u32 PM_GetAmpGain( PMAmpGain* gainBuf );
This function gets the current setting for the gain of the programmable gain amp.
The value of the PMAmpGain enumerator type is saved in the gainBuf argument and can contain either one of the following values:
PM_AMPGAIN_20 |
gain = 20 times |
PM_AMPGAIN_40 |
gain = 40 times |
PM_AMPGAIN_80 |
gain = 80 times |
PM_AMPGAIN_160 |
gain = 160 times |
This function uses PXI to send the command that performs the corresponding operation in the ARM7 processor. The ARM7 side that receives that command is executed by operating the PMIC. Therefore, when you call the function, it may not operate promptly.
Before you use this function, initialize the PM library by using the PM_Init() function. The PM_Init() function has to be called only once.
The OS_Init() function is called from within the PM_Init() function. If you need to call the OS_Init() function, you have to call the PM_Init() function only once. There is no need for the OS_Init() function to be called separately.
Reads the value of the PMIC register PGA_GAIN.
gainBuf |
buffer that stores the results of settings that determine the amp gain |
The PM_RESULT_SUCCESS return value indicates that the execution of the command has succeeded.
The PM_RESULT_ERROR return value indicates that an error has occurred with the ARM7 processor.
08/09/2004 Initial version