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PifaceIOHandler.cpp
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PifaceIOHandler.cpp
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#include "PifaceIOHandler.h"
extern "C" {
#include <libpiface-1.0/pfio.h>
}
#include <asiodnp3/MeasUpdate.h>
#include <iostream>
#include <chrono>
#include <sys/time.h>
using namespace opendnp3;
using namespace asiodnp3;
static uint64_t gettime()
{
struct timeval tv;
if(gettimeofday(&tv, NULL) < 0)
return 0;
return (tv.tv_sec*1000 + tv.tv_usec/1000);
}
void PifaceIOHandler::ProcessPulses()
{
uint64_t t = gettime();
for(int i=0; i<8; i++) {
if(pulse[i].crob.count <= 0)
continue;
if(t >= pulse[i].when) {
if(pulse[i].state) {
pfio_digital_write(i, 0);
pulse[i].state = false;
pulse[i].when += pulse[i].crob.offTimeMS;
pulse[i].crob.count--;
} else {
pfio_digital_write(i, 1);
pulse[i].state = true;
pulse[i].when += pulse[i].crob.onTimeMS;
}
}
}
}
void PifaceIOHandler::DoOperate(const ControlRelayOutputBlock& command, uint8_t index)
{
switch(command.functionCode)
{
case(ControlCode::PULSE_ON):
pulse[index].when = gettime(); // now
pulse[index].state = 0;
pulse[index].crob = command;
// -> will activate in main loop
break;
case(ControlCode::PULSE_OFF):
pulse[index].crob.count = 0;
pfio_digital_write(index, 0);
break;
case(ControlCode::LATCH_ON):
case(ControlCode::LATCH_OFF): {
uint8_t value = (command.functionCode == ControlCode::LATCH_ON) ? 1 : 0;
pfio_digital_write(index, value);
break;
}
default:
break;
}
}
CommandStatus PifaceIOHandler::ValidateCROB(const ControlRelayOutputBlock& command, uint16_t index)
{
if(index >= 8)
{
return CommandStatus::NOT_SUPPORTED;
}
switch(command.functionCode)
{
case(ControlCode::LATCH_ON):
case(ControlCode::LATCH_OFF):
case(ControlCode::PULSE_ON):
case(ControlCode::PULSE_OFF):
return CommandStatus::SUCCESS;
default:
return CommandStatus::NOT_SUPPORTED;
}
}
bool PifaceIOHandler::isSwitchOn(int data, int num)
{
int mask = 1 << num; // 255 is all off, switch 0 is lowest bit
bool ret = ((data & mask) == 0);
return ret;
}
PifaceIOHandler::PifaceIOHandler()
{
int result = pfio_init();
if(result < 0)
{
std::cerr << "Unable to initialize piface" << std::endl;
exit(result);
}
for(int i=0; i<8; i++)
pulse[i].crob.count=0;
}
PifaceIOHandler::~PifaceIOHandler()
{
pfio_deinit();
}
void PifaceIOHandler::ReadMeasurements(asiodnp3::IOutstation* pOutstation)
{
const uint8_t ONLINE = 0x01;
int data = pfio_read_input();
MeasUpdate tx(pOutstation);
tx.Update(Binary(isSwitchOn(data, 0), ONLINE), 0);
tx.Update(Binary(isSwitchOn(data, 1), ONLINE), 1);
tx.Update(Binary(isSwitchOn(data, 2), ONLINE), 2);
tx.Update(Binary(isSwitchOn(data, 3), ONLINE), 3);
}
CommandStatus PifaceIOHandler::Select(const ControlRelayOutputBlock& command, uint16_t index)
{
return ValidateCROB(command, index);
}
CommandStatus PifaceIOHandler::Operate(const ControlRelayOutputBlock& command, uint16_t index, OperateType opType)
{
CommandStatus validation = ValidateCROB(command, index);
if(validation == CommandStatus::SUCCESS) DoOperate(command, static_cast<char>(index));
return validation;
}