void readByNameExample(std::ostream& out, long port, const AmsAddr& server)
{
static const char handleName[] = "MAIN.byByte[4]";
uint32_t bytesRead;
out << __FUNCTION__ << "():\n";
const uint32_t handle = getHandleByNameExample(out, port, server, handleName);
const uint32_t bufferSize = getSymbolSize(out, port, server, handleName);
const auto buffer = std::unique_ptr<uint8_t>(new uint8_t[bufferSize]);
for (size_t i = 0; i < 8; ++i) {
const long status = AdsSyncReadReqEx2(port,
&server,
ADSIGRP_SYM_VALBYHND,
handle,
bufferSize,
buffer.get(),
&bytesRead);
if (status) {
out << "ADS read failed with: " << std::dec << status << '\n';
return;
}
out << "ADS read " << std::dec << bytesRead << " bytes:" << std::hex;
for (size_t i = 0; i < bytesRead; ++i) {
out << ' ' << (int)buffer.get()[i];
}
out << '\n';
}
releaseHandleExample(out, port, server, handle);
}
/**
* @brief A frontend to AdsSyncReadReqEx2() with port = defaultPort and pnRead = NULL
*/
int32_t AdsSyncReadReq(PAmsAddr pAddr,
uint32_t nIndexGroup,
uint32_t nIndexOffset,
uint32_t nLength, void *pData)
{
return AdsSyncReadReqEx2(defaultPort, pAddr,
nIndexGroup, nIndexOffset,
nLength, pData,
NULL);
}
void readExample(std::ostream& out, long port, const AmsAddr& server)
{
uint32_t bytesRead;
uint32_t buffer;
out << __FUNCTION__ << "():\n";
for (size_t i = 0; i < 8; ++i) {
const long status = AdsSyncReadReqEx2(port, &server, 0x4020, 0, sizeof(buffer), &buffer, &bytesRead);
if (status) {
out << "ADS read failed with: " << std::dec << status << '\n';
return;
}
out << "ADS read " << std::dec << bytesRead << " bytes, value: 0x" << std::hex << buffer << '\n';
}
}