/**
* Reads an accelerometer value from a single register. Reading from
* the accelerometer is common for all directions.
*
* @param[in] reg The register address to read from
* @param[in] scale_weight The weight for the accelerometer values
* @return the acceleration value in g's
*/
double Accel_ReadImpl(uint32_t reg, double scale_weight)
{
NiFpga_Status status;
uint16_t value;
double scaledValue;
/*
* Get the value of the acceleration value register.
*
* The returned NiFpga_Status value is stored for error checking.
*/
status = NiFpga_ReadU16(myrio_session, reg, &value);
/*
* Check if there was an error reading from the read register.
*
* If there was an error then the rest of the function cannot complete
* correctly so print an error message to stdout and return from the
* function early.
*/
MyRio_ReturnValueIfNotSuccess(status, 0.0,
"Could not read from the accelerometer value register!")
/*
* The value is always stored in an unsigned 16-bit register, but the value
* is actually a signed 16-bit value. Cast this value directly to a signed
* 16-bit value.
*/
scaledValue = ((int16_t) value) * scale_weight;
return scaledValue;
}
uint16_t FPGA_GetRCCH3() {
uint16_t retval;
NiFpga_MergeStatus(&FPGA_Status,NiFpga_ReadU16(FPGA_Session,NiFpga_mainFPGA_IndicatorU16_C3Mode,&retval));
if (NiFpga_IsError(FPGA_Status))
{
LOG.ERR("Get RC CH3 Read Failed.");
}
return retval;
}
/**
* Reads a voltage value to from single channel. The channel structure must
* previously been initialized with the appropriate scale factors with
* AnalogScaling.
*
* @param[in] channel A struct containing the registers for the AIO
* channel to be read from
* @return the voltage value in volts
*/
double Aio_Read(MyRio_Aio* channel)
{
NiFpga_Status status;
uint16_t value = 0;
double scaledValue;
/*
* Get the value of the value register.
*
* The returned NiFpga_Status value is stored for error checking.
*/
status = NiFpga_ReadU16(myrio_session, channel->val, &value);
/*
* Check if there was an error reading from the read register.
*
* If there was an error then the rest of the function cannot complete
* correctly so print an error message to stdout and return from the
* function early. Return 0.0 as the read input value.
*/
MyRio_ReturnValueIfNotSuccess(status, 0.0,
"Could not read from the AI value registers!");
/*
* The value is always stored in an unsigned 16-bit register. For a signed
* channel, cast this value directly to a signed 16-bit value.
*/
if (channel->is_signed)
{
scaledValue = (int16_t)value * channel->scale_weight
+ channel->scale_offset;
}
else
{
scaledValue = value * channel->scale_weight + channel->scale_offset;
}
return scaledValue;
}
bool nifpga::ReadU16(uint32_t indicator, uint16_t* value) {
if (sessionOpen) return HandleStatus(NiFpga_ReadU16(sessionHandle, indicator, value));
return false;
}
