void run() {
// declare an instance of the USART and the stream that we'll use to write to it
_usart=new MyUsart(57600);
_outputStream=new UsartPollingOutputStream(*_usart);
// declare the RTC that that stack requires. it's used for cache timeouts, DHCP lease expiry
// and such like so it does not have to be calibrated for accuracy. A few seconds here or there
// over a 24 hour period isn't going to make any difference. Start it ticking at zero which is
// some way back in 2000 but that doesn't matter to us
Rtc<RtcLsiClockFeature<Rtc32kHzLsiFrequencyProvider>,RtcSecondInterruptFeature> rtc;
rtc.setTick(0);
// declare an instance of the network stack
MyNetworkStack::Parameters params;
_net=new MyNetworkStack;
// the stack requires the RTC
params.base_rtc=&rtc;
// It's nice to give the DHCP client a host name because then it'll show up in DHCP
// 'active leases' page. In a home router this is often called 'attached devices'
params.dhcp_hostname="stm32plus";
// subscribe to error events from the network stack
_net->NetworkErrorEventSender.insertSubscriber(NetworkErrorEventSourceSlot::bind(this,&NetHttpClientTest::onError));
// Initialise the stack. This will reset the PHY, initialise the MAC
// and attempt to create a link to our link partner. Ensure your cable
// is plugged in when you run this or be prepared to handle the error
if(!_net->initialise(params))
error();
// start the ethernet MAC Tx/Rx DMA channels
// this will trigger the DHCP transaction
if(!_net->startup())
error();
// look up the IP address for www.st.com
*_outputStream << "Looking up the DNS address for www.st.com\r\n";
IpAddress address;
if(!_net->dnsHostnameQuery("www.st.com",address)) {
*_outputStream << "Failed to look up www.st.com\r\n";
error();
}
*_outputStream << "Connecting to www.st.com:80\r\n";
// create the connection
TcpClientConnection *ptr;
if(!_net->tcpConnect<TcpClientConnection>(address,80,ptr)) {
*_outputStream << "Failed to connect to www.st.com\r\n";
error();
}
{
// manage the connection pointer in a scoped_ptr so it's automatically deleted (and closed)
// when it goes out of scope
scoped_ptr<TcpClientConnection> conn(ptr);
HttpClient httpClient(*conn);
// set the parameters for the HTTP GET
httpClient.setUri("/"); // get the root document
httpClient.setHost("www.st.com"); // host header is mandatory for HTTP/1.1
// send it
*_outputStream << "Sending request to server\r\n";
if(!httpClient.sendRequest()) {
*_outputStream << "Failed to send the request to the server\r\n";
error();
}
// must have a content-length for this test call
int32_t contentLength;
if((contentLength=httpClient.getResponseContentLength())==-1) {
*_outputStream << "Server did not send a Content-Length header\r\n";
error();
}
// read back the response in 100 byte chunks with a 60 second timeout
uint8_t buffer[100];
uint32_t actuallyRead;
*_outputStream << "Reading response body from the server\r\n";
while(contentLength) {
// read a chunk
if(!conn->receive(buffer,Min(contentLength,100L),actuallyRead,60000)) {
*_outputStream << "Timed out waiting for data from the server\r\n";
error();
}
if(actuallyRead==0) {
*_outputStream << "The remote end has closed the connection\r\n";
error();
}
// push out to the USART
_outputStream->write(buffer,actuallyRead);
// decrease amount remaining
contentLength-=actuallyRead;
}
*_outputStream << "Finished reading response body\r\n";
}
// finished, reset the board to try again
for(;;);
}
void run() {
// declare an instance of the USART and the stream that we'll use to write to it
_usart=new MyUsart(57600);
_outputStream=new UsartPollingOutputStream(*_usart);
// declare the RTC that that stack requires. it's used for cache timeouts, DHCP lease expiry
// and such like so it does not have to be calibrated for accuracy. A few seconds here or there
// over a 24 hour period isn't going to make any difference. Start it ticking at zero which is
// some way back in 2000 but that doesn't matter to us
Rtc<RtcLsiClockFeature<Rtc32kHzLsiFrequencyProvider>,RtcSecondInterruptFeature> rtc;
rtc.setTick(0);
// declare an instance of the network stack
MyNetworkStack::Parameters params;
_net=new MyNetworkStack;
// the stack requires the RTC
params.base_rtc=&rtc;
// It's nice to give the DHCP client a host name because then it'll show up in DHCP
// 'active leases' page. In a home router this is often called 'attached devices'
params.dhcp_hostname="stm32plus";
// subscribe to error events from the network stack
_net->NetworkErrorEventSender.insertSubscriber(NetworkErrorEventSourceSlot::bind(this,&NetTcpClientTest::onError));
// Initialise the stack. This will reset the PHY, initialise the MAC
// and attempt to create a link to our link partner. Ensure your cable
// is plugged in when you run this or be prepared to handle the error
if(!_net->initialise(params))
error();
// start the ethernet MAC Tx/Rx DMA channels
// this will trigger the DHCP transaction
if(!_net->startup())
error();
*_outputStream << "The TCP client is ready to run\r\n";
TcpClientConnection *ptr;
uint32_t actuallyReceived,actuallySent;
char buffer[100];
for(;;) {
// connect to the remote end using a random local ephemeral port
if(_net->tcpConnect<TcpClientConnection>("192.168.1.3",12345,ptr)) {
// manage the connection pointer in a scoped_ptr so it's automatically deleted (and closed)
// when it goes out of scope
scoped_ptr<TcpClientConnection> conn(ptr);
// send 11 bytes of text and a newline to the other end (blocking). We have to copy the data to
// a sram buffer before sending because the STM32 Ethernet DMA peripheral cannot transmit from
// flash memory. (string constants are compiled into flash).
strcpy(buffer,"Hello World\n");
if(conn->send(buffer,12,actuallySent) && actuallySent==12) {
// receive the response line from the other end (blocking)
if(conn->receive(buffer,100,actuallyReceived) && actuallyReceived>0) {
// write the response to the USART stream
_outputStream->write(buffer,actuallyReceived);
}
}
}
else
*_outputStream << "Timed out while trying to connect, trying again...\r\n";
// pause for 5 seconds to avoid flooding the network before doing it again
MillisecondTimer::delay(5000);
}
}
