This is an example based on mbed-os cellular APIs that demonstrates a TCP or UDP echo transaction with a public echo server.
Diff: main.cpp
- Revision:
- 6:5678c0b6f74e
- Parent:
- 2:0f644d6045cf
- Child:
- 11:23ea0907186e
--- a/main.cpp Wed Apr 11 06:30:27 2018 +0100 +++ b/main.cpp Thu May 10 05:17:02 2018 +0100 @@ -18,6 +18,7 @@ #include "common_functions.h" #include "UDPSocket.h" #include "OnboardCellularInterface.h" +#include "CellularLog.h" #define UDP 0 #define TCP 1 @@ -51,65 +52,93 @@ // Echo server port (same for TCP and UDP) const int port = 7; -Mutex PrintMutex; +static rtos::Mutex trace_mutex; + +#if MBED_CONF_MBED_TRACE_ENABLE +static void trace_wait() +{ + trace_mutex.lock(); +} + +static void trace_release() +{ + trace_mutex.unlock(); +} + +static char time_st[50]; + +static char* trace_time(size_t ss) +{ + snprintf(time_st, 49, "[%08llums]", Kernel::get_ms_count()); + return time_st; +} + +static void trace_open() +{ + mbed_trace_init(); + mbed_trace_prefix_function_set( &trace_time ); + + mbed_trace_mutex_wait_function_set(trace_wait); + mbed_trace_mutex_release_function_set(trace_release); +} + +static void trace_close() +{ + mbed_trace_free(); +} +#endif // #if MBED_CONF_MBED_TRACE_ENABLE + Thread dot_thread(osPriorityNormal, 512); -#define PRINT_TEXT_LENGTH 128 -char print_text[PRINT_TEXT_LENGTH]; -void print_function(const char *input_string) +void print_function(const char *format, ...) { - PrintMutex.lock(); - printf("%s", input_string); - fflush(NULL); - PrintMutex.unlock(); + trace_mutex.lock(); + va_list arglist; + va_start( arglist, format ); + vprintf(format, arglist); + va_end( arglist ); + trace_mutex.unlock(); } void dot_event() { - while (true) { - wait(4); + Thread::wait(4000); if (!iface.is_connected()) { - print_function("."); + trace_mutex.lock(); + printf("."); + fflush(stdout); + trace_mutex.unlock(); } else { break; } } - } - /** * Connects to the Cellular Network */ nsapi_error_t do_connect() { - nsapi_error_t retcode; + nsapi_error_t retcode = NSAPI_ERROR_OK; uint8_t retry_counter = 0; while (!iface.is_connected()) { - retcode = iface.connect(); if (retcode == NSAPI_ERROR_AUTH_FAILURE) { print_function("\n\nAuthentication Failure. Exiting application\n"); - return retcode; - } else if (retcode != NSAPI_ERROR_OK) { - snprintf(print_text, PRINT_TEXT_LENGTH, "\n\nCouldn't connect: %d, will retry\n", retcode); - print_function(print_text); + } else if (retcode == NSAPI_ERROR_OK) { + print_function("\n\nConnection Established.\n"); + } else if (retry_counter > RETRY_COUNT) { + print_function("\n\nFatal connection failure: %d\n", retcode); + } else { + print_function("\n\nCouldn't connect: %d, will retry\n", retcode); retry_counter++; continue; - } else if (retcode != NSAPI_ERROR_OK && retry_counter > RETRY_COUNT) { - snprintf(print_text, PRINT_TEXT_LENGTH, "\n\nFatal connection failure: %d\n", retcode); - print_function(print_text); - return retcode; } - break; } - - print_function("\n\nConnection Established.\n"); - - return NSAPI_ERROR_OK; + return retcode; } /** @@ -127,17 +156,14 @@ retcode = sock.open(&iface); if (retcode != NSAPI_ERROR_OK) { - snprintf(print_text, PRINT_TEXT_LENGTH, "UDPSocket.open() fails, code: %d\n", retcode); - print_function(print_text); + print_function("UDPSocket.open() fails, code: %d\n", retcode); return -1; } SocketAddress sock_addr; retcode = iface.gethostbyname(host_name, &sock_addr); if (retcode != NSAPI_ERROR_OK) { - snprintf(print_text, PRINT_TEXT_LENGTH, "Couldn't resolve remote host: %s, code: %d\n", host_name, - retcode); - print_function(print_text); + print_function("Couldn't resolve remote host: %s, code: %d\n", host_name, retcode); return -1; } @@ -150,21 +176,17 @@ #if MBED_CONF_APP_SOCK_TYPE == TCP retcode = sock.connect(sock_addr); if (retcode < 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCPSocket.connect() fails, code: %d\n", retcode); - print_function(print_text); + print_function("TCPSocket.connect() fails, code: %d\n", retcode); return -1; } else { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCP: connected with %s server\n", host_name); - print_function(print_text); + print_function("TCP: connected with %s server\n", host_name); } retcode = sock.send((void*) echo_string, sizeof(echo_string)); if (retcode < 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCPSocket.send() fails, code: %d\n", retcode); - print_function(print_text); + print_function("TCPSocket.send() fails, code: %d\n", retcode); return -1; } else { - snprintf(print_text, PRINT_TEXT_LENGTH, "TCP: Sent %d Bytes to %s\n", retcode, host_name); - print_function(print_text); + print_function("TCP: Sent %d Bytes to %s\n", retcode, host_name); } n = sock.recv((void*) recv_buf, sizeof(recv_buf)); @@ -172,12 +194,10 @@ retcode = sock.sendto(sock_addr, (void*) echo_string, sizeof(echo_string)); if (retcode < 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "UDPSocket.sendto() fails, code: %d\n", retcode); - print_function(print_text); + print_function("UDPSocket.sendto() fails, code: %d\n", retcode); return -1; } else { - snprintf(print_text, PRINT_TEXT_LENGTH, "UDP: Sent %d Bytes to %s\n", retcode, host_name); - print_function(print_text); + print_function("UDP: Sent %d Bytes to %s\n", retcode, host_name); } n = sock.recvfrom(&sock_addr, (void*) recv_buf, sizeof(recv_buf)); @@ -186,8 +206,7 @@ sock.close(); if (n > 0) { - snprintf(print_text, PRINT_TEXT_LENGTH, "Received from echo server %d Bytes\n", n); - print_function(print_text); + print_function("Received from echo server %d Bytes\n", n); return 0; } @@ -196,28 +215,38 @@ int main() { - - iface.modem_debug_on(MBED_CONF_APP_MODEM_TRACE); + print_function("\n\nmbed-os-example-cellular\n"); + print_function("Establishing connection\n"); +#if MBED_CONF_MBED_TRACE_ENABLE + trace_open(); +#else + dot_thread.start(dot_event); +#endif // #if MBED_CONF_MBED_TRACE_ENABLE /* Set Pin code for SIM card */ iface.set_sim_pin(MBED_CONF_APP_SIM_PIN_CODE); - /* Set network credentials here, e.g., APN*/ + /* Set network credentials here, e.g., APN */ iface.set_credentials(MBED_CONF_APP_APN, MBED_CONF_APP_USERNAME, MBED_CONF_APP_PASSWORD); - print_function("\n\nmbed-os-example-cellular\n"); - print_function("Establishing connection "); - dot_thread.start(dot_event); + /* Set the modem debug on/off */ + iface.modem_debug_on(MBED_CONF_APP_MODEM_TRACE); + + nsapi_error_t retcode = NSAPI_ERROR_NO_CONNECTION; /* Attempt to connect to a cellular network */ if (do_connect() == NSAPI_ERROR_OK) { - nsapi_error_t retcode = test_send_recv(); - if (retcode == NSAPI_ERROR_OK) { - print_function("\n\nSuccess. Exiting \n\n"); - return 0; - } + retcode = test_send_recv(); } - print_function("\n\nFailure. Exiting \n\n"); - return -1; + if (retcode == NSAPI_ERROR_OK) { + print_function("\n\nSuccess. Exiting \n\n"); + } else { + print_function("\n\nFailure. Exiting \n\n"); + } +#if MBED_CONF_MBED_TRACE_ENABLE + trace_close(); +#endif // #if MBED_CONF_MBED_TRACE_ENABLE + + return 0; } // EOF