/** Called when asyn clients call pasynFloat64->write().
* This function sends a signal to the simTask thread if the value of P_UpdateTime has changed.
* For all parameters it sets the value in the parameter library and calls any registered callbacks.
* \param[in] pasynUser pasynUser structure that encodes the reason and address.
* \param[in] value Value to write. */
asynStatus drvQuadEM::writeFloat64(asynUser *pasynUser, epicsFloat64 value)
{
int function = pasynUser->reason;
int status = asynSuccess;
int channel;
const char *paramName;
const char* functionName = "writeFloat64";
getAddress(pasynUser, &channel);
/* Set the parameter in the parameter library. */
status |= setDoubleParam(channel, function, value);
/* Fetch the parameter string name for possible use in debugging */
getParamName(function, ¶mName);
if (function == P_AveragingTime) {
status |= setAveragingTime(value);
epicsRingBytesFlush(ringBuffer_);
ringCount_ = 0;
status |= readStatus();
}
else if (function == P_BiasVoltage) {
status |= setBiasVoltage(value);
status |= readStatus();
}
else if (function == P_IntegrationTime) {
status |= setIntegrationTime(value);
status |= readStatus();
}
else {
/* All other parameters just get set in parameter list, no need to
* act on them here */
}
/* Do callbacks so higher layers see any changes */
status |= (asynStatus) callParamCallbacks();
if (status)
epicsSnprintf(pasynUser->errorMessage, pasynUser->errorMessageSize,
"%s:%s: status=%d, function=%d, name=%s, value=%f",
driverName, functionName, status, function, paramName, value);
else
asynPrint(pasynUser, ASYN_TRACEIO_DRIVER,
"%s:%s: function=%d, name=%s, value=%f\n",
driverName, functionName, function, paramName, value);
return (asynStatus)status;
}
/** Downloads all of the current EPICS settings to the electrometer.
* Typically used after the electrometer is power-cycled.
*/
asynStatus drvQuadEM::reset()
{
epicsInt32 iValue;
epicsFloat64 dValue;
getIntegerParam(P_Range, &iValue);
setRange(iValue);
getIntegerParam(P_ValuesPerRead, &iValue);
setValuesPerRead(iValue);
getDoubleParam(P_AveragingTime, &dValue);
setAveragingTime(dValue);
getIntegerParam(P_TriggerMode, &iValue);
setTriggerMode(iValue);
getIntegerParam(P_NumChannels, &iValue);
setNumChannels(iValue);
getIntegerParam(P_BiasState, &iValue);
setBiasState(iValue);
getIntegerParam(P_BiasInterlock, &iValue);
setBiasInterlock(iValue);
getDoubleParam(P_BiasVoltage, &dValue);
setBiasVoltage(dValue);
getIntegerParam(P_Resolution, &iValue);
setResolution(iValue);
getIntegerParam(P_ReadFormat, &iValue);
setReadFormat(iValue);
getDoubleParam(P_IntegrationTime, &dValue);
setIntegrationTime(dValue);
readStatus();
getIntegerParam(P_Acquire, &iValue);
setAcquire(iValue);
return asynSuccess;
}
int main(void)
{
// init all needed services
cli();
timer_init();
USART_init();
ADC_init();
sei();
// set up enable port
ENA_DDR = /*(1 << ENA_LED) |*/ (1 << ENA_PIN);
// ENA_PORT = (1 << ENA_LED);
// init condition is receiving
driverReceive();
// string, char and ascii buffers for serial comm.
uint8_t read_buf = 0x00, ascii_bufh = 0x00, ascii_bufl = 0x00;
char str_buf[10];
// send own address on startup
HexToAscii(str_buf, 3, own_addr);
sendString(str_buf);
sendString(EOM);
while(1) {
// check if there is something to be read (non blocking...)
if ( USART_dataAvaliable() ){
read_buf = 0x00;
read_buf = USART_readByte();
switch(MPPC_status){
/* no start delimiter, awaits start delimiter */
case IDLE:
if (read_buf == '<'){
MPPC_status = LISTENING;
} else {
MPPC_status = IDLE;
sleep_ms(2);
}
break;
/* received a start delimiter, awaits adress */
case LISTENING:
// check wether there are characters or ASCII numbers beeing send
if ( ((read_buf >= '0') && (read_buf <= '9')) ||
((read_buf >= 'A') && (read_buf <= 'F')) ) {
// a ASCII number has been sent, we need another digit
str_buf[0] = read_buf;
str_buf[1] = USART_receiveByte();
// convert both ascii numbers into a 'real' hex number
read_buf = AsciiToHex(str_buf, 2);
HexToAscii(str_buf, 3, read_buf);
} else {
// in this stage we need an address; if there are no numbers beeing sent, we are not interested anymore!
MPPC_status = IDLE;
break;
}
// We received an address, converted it to hex and now want to check, if it is our's
if (read_buf == own_addr){
MPPC_status = ADDRESSED;
// SEL_LED on -> module has been selected + echo
sendString(str_buf);
// ENA_PORT&= ~(1 << ENA_LED);
// echo in ASCII
} else {
MPPC_status = IDLE;
}
break;
/* received it's own address, awaits command */
case ADDRESSED:
if (read_buf == '>'){ // stop delimiter
MPPC_status = IDLE;
// ENA_PORT |= (1 << ENA_LED); // SEL_LED off -> module has been deselected
} else {
command_handler(read_buf); // yet another switch/case stucture...
}
break;
} // end switch
} // end if
// apply bias voltages
setBiasVoltage();
}
}