Diff: main.cpp

Revision:

0:11bc39d0f367

Child:

1:c53f82eb6b42

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/main.cpp	Fri May 05 07:40:19 2017 +0000
@@ -0,0 +1,322 @@
+/*
+ * Copyright (c) 2017 Nuvoton Tecnology Corp. All rights reserved.
+ *
+ * The code is forward data from UART port to Ethernet, and vice versa.
+ * 
+ *
+ */
+ 
+#include "ste_config.h"
+
+/* If define USE_STATIC_IP, specify the default IP address. */
+#if 0
+    // private IP address for general purpose
+#define IP_ADDRESS      "192.168.1.2"
+#define NETWORK_MASK    "255.255.255.0"
+#define GATEWAY_ADDRESS "192.168.1.1"
+#else
+    // private IP address only for test with Windows when DHCP server doesn't exist.
+#define IP_ADDRESS      "169.254.108.2"
+#define NETWORK_MASK    "255.255.0.0"
+#define GATEWAY_ADDRESS "169.254.108.1"
+#endif
+
+/* Default configuration for network */
+S_NET_CONFIG net_config = {IP_STATIC_MODE, IP_ADDRESS, NETWORK_MASK, GATEWAY_ADDRESS};
+
+#if defined (TARGET_NUMAKER_PFM_M487)
+#error Not defined UART ports yet.
+
+#elif defined (TARGET_NUMAKER_PFM_NUC472)
+BufferedSerial serial_0(PH_1, PH_0, 256, 4);    // UART4
+BufferedSerial serial_1(PG_2, PG_1, 256, 4);    // UART0
+BufferedSerial serial_2(PC_11, PC_10, 256, 4);  // UART2
+
+#elif defined (TARGET_NUMAKER_PFM_M453)
+#error The board has no Ethernet.
+
+#else
+#error define UART ports for your board.
+#endif
+
+/* Default configuration for network ports and UART ports, etc. */
+S_PORT_CONFIG port_config[MAX_UART_PORTS] = {
+
+#if MAX_UART_PORTS == 1
+    {NET_SERVER_MODE, NET_PORT_BASE, &serial_0, DEFAULT_UART_BAUD, 8, 1, SerialBase::None}
+
+#elif MAX_UART_PORTS == 2
+    {NET_SERVER_MODE, NET_PORT_BASE + 0, &serial_0, DEFAULT_UART_BAUD, 8, 1, SerialBase::None},
+    {NET_SERVER_MODE, NET_PORT_BASE + 1, &serial_1, DEFAULT_UART_BAUD, 8, 1, SerialBase::None}
+
+#elif MAX_UART_PORTS == 3
+    {NET_SERVER_MODE, NET_PORT_BASE + 0, &serial_0, DEFAULT_UART_BAUD, 8, 1, SerialBase::None},
+    {NET_SERVER_MODE, NET_PORT_BASE + 1, &serial_1, DEFAULT_UART_BAUD, 8, 1, SerialBase::None},
+    {NET_SERVER_MODE, NET_PORT_BASE + 2, &serial_2, DEFAULT_UART_BAUD, 8, 1, SerialBase::None}
+
+#else
+#error You have to define ports mapping table.
+#endif
+};
+
+/* UART port to output debug message */
+RawSerial output(USBTX, USBRX);             // UART3 on NuMaker-PFM-NUC472
+EthernetInterface eth;
+
+#ifdef ENABLE_WEB_CONFIG
+
+/* Declare the SD card as storage */
+NuSDBlockDevice bd;
+FATFileSystem fs("fs");
+bool SD_Card_Mounted = FALSE;
+
+#endif
+
+/* ---                  --- */
+
+/*
+ * Forward serial port data to ethernet, and vice versa.
+ *
+ */
+void exchange_data(S_PORT_CONFIG *pmap, TCPSocket *psocket)
+{
+    unsigned char n_buf[256];
+    unsigned char s_buf[256];
+    int n_len = 0, n_index = 0;
+    int s_len = 0, s_index = 0;
+    
+    while(1)
+    {   
+        /*** Network to Serial ***/
+        
+        if (n_len < 0 || n_len == n_index)
+        {
+            // net buffer is empty, try to get new data from network.
+            n_len = psocket->recv(n_buf, sizeof(n_buf));
+            if (n_len == NSAPI_ERROR_WOULD_BLOCK)
+            {
+            }
+            else if (n_len < 0)
+            {
+                printf("Socket Recv Err (%d)\r\n", n_len);
+                psocket->close();
+                break;
+            }
+            else
+            {
+                n_index = 0;
+            }
+        }
+        else
+        {
+            // send data to serial port.
+            for(;n_index < n_len && pmap->pserial->writeable(); n_index++)
+            {
+                pmap->pserial->putc(n_buf[n_index]);
+            }
+        }
+
+        /*** Serial to Network ***/
+        
+        if (pmap->pserial->readable())
+        {
+            // try to get more data from serial port
+            for(s_index = 0; s_index < sizeof(s_buf) && pmap->pserial->readable(); s_index++)
+                s_buf[s_index] = pmap->pserial->getc();
+            
+            // send all data to network.
+            if (s_index > 0)
+            {
+                s_len = psocket->send(s_buf, s_index); 
+                if (s_len == NSAPI_ERROR_WOULD_BLOCK)
+                {
+                    printf("Socket Send no block.\r\n");
+                }               
+                else if (s_len < 0)
+                {
+                    printf("Socket Send Err (%d)\r\n", s_len);
+                    psocket->close();
+                    break;
+                }
+                else if (s_len != s_index)
+                {
+                    printf("Socket Send not complete.\r\n");
+                    psocket->close();
+                    break;
+                }
+            }
+        }
+    }
+}   
+
+void bridge_net_client(S_PORT_CONFIG *pmap)
+{
+    TCPSocket socket;
+    SocketAddress server_address;
+    nsapi_error_t err;
+
+    printf("Thread %x in TCP client mode.\r\n", (unsigned int)pmap);
+
+    if ((err=socket.open(&eth)) < 0)
+    {
+        printf("TCP socket can't open (%d)(%x).\r\n", err, (unsigned int)pmap);
+        return;
+    }
+    
+    printf("Connecting server %s:%d ...\r\n", pmap->server_addr, pmap->server_port);
+    while(1)
+    {
+        if ((err=socket.connect(pmap->server_addr, pmap->server_port)) >= 0)
+            break;
+    }
+    
+    printf("\r\nConnected.");
+
+    socket.set_timeout(1);
+    exchange_data(pmap, &socket);
+}
+
+void bridge_net_server(S_PORT_CONFIG *pmap)
+{
+    TCPServer tcp_server;
+    TCPSocket client_socket;
+    SocketAddress client_address;
+    nsapi_error_t err;
+    
+    printf("Thread %x in TCP server mode.\r\n", (unsigned int)pmap);
+    
+    if ((err=tcp_server.open(&eth)) < 0)
+    {
+        printf("TCP server can't open (%d)(%x).\r\n", err, (unsigned int)pmap);
+        return;
+    }
+    if ((err=tcp_server.bind(eth.get_ip_address(), pmap->port)) < 0)
+    {
+        printf("TCP server can't bind address and port (%d)(%x).\r\n", err, (unsigned int)pmap);
+        return;
+    }
+    if ((err=tcp_server.listen(1)) < 0)
+    {
+        printf("TCP server can't listen (%d)(%x).\r\n", err, (unsigned int)pmap);
+        return;
+    }
+
+    client_socket.set_timeout(1);
+
+    while(1)
+    {   
+        if ((err=tcp_server.accept(&client_socket, &client_address)) < 0)
+        {
+            printf("TCP server fail to accept connection (%d)(%x).\r\n", err, (unsigned int)pmap);
+            return;
+        }
+
+        printf("Connect (%d) from %s:%d ...\r\n", pmap->port, client_address.get_ip_address(), client_address.get_port());
+
+        exchange_data(pmap, &client_socket);        
+    }
+}   
+
+int main()
+{
+    /* Set the console baud-rate */
+    output.baud(115200);
+    printf("\r\nmbed OS version is %d.\r\n", MBED_VERSION);
+    printf("Start Serial-to-Ethernet...\r\n");
+
+#ifdef ENABLE_WEB_CONFIG
+
+    /* Restore configuration from SD card */
+    
+    SD_Card_Mounted = (fs.mount(&bd) >= 0);
+    if (SD_Card_Mounted)
+    {
+        FILE *fd = fopen(SER_CONFIG_FILE, "r");
+        if (fd != NULL)
+        {
+            char pBuf[sizeof(port_config)+2];
+            int len = fread(pBuf, 1, sizeof(port_config)+2, fd);
+            if (len == (sizeof(port_config)+2) && pBuf[0] == 'N' && pBuf[1] == 'T') 
+            {
+                printf("Set Serial ports from config file in SD card.\r\n");
+                memcpy(port_config, pBuf+2, sizeof(port_config));
+            }
+            else
+                printf("Incorrect serial config file.\r\n");
+            
+            fclose(fd);
+        }
+        else
+            printf("Can't open serial config file.\r\n");
+        
+        fd = fopen(NET_CONFIG_FILE, "r");
+        if (fd != NULL)
+        {
+            char pBuf[sizeof(net_config)+2];
+            int len = fread(pBuf, 1, sizeof(net_config)+2, fd);
+            if (len == (sizeof(net_config)+2) && pBuf[0] == 'N' && pBuf[1] == 'T') 
+            {
+                printf("Set network from config file in SD card.\r\n");
+                memcpy(&net_config, pBuf+2, sizeof(net_config));
+            }
+            else
+                printf("Incorrect network config file.\r\n");
+            
+            fclose(fd);
+        }
+        else
+            printf("Can't open network config file.\r\n");
+    }
+    else
+    {
+        printf("Can't find SD card.\r\n");
+    }
+
+#endif
+    
+    printf("Configure UART ports...\r\n");
+    for(int i=0; i<MAX_UART_PORTS; i++)
+    {
+        port_config[i].pserial->baud(port_config[i].baud);
+        port_config[i].pserial->format(port_config[i].data, port_config[i].parity, port_config[i].stop);
+    }
+    
+    if (net_config.mode == IP_STATIC_MODE)
+    {
+        printf("Start Ethernet in Static mode.\r\n");
+        eth.disconnect();
+        ((NetworkInterface *)&eth)->set_network(net_config.ip, net_config.mask, net_config.gateway);
+    }
+    else
+        printf("Start Ethernet in DHCP mode.\r\n");
+    
+    eth.connect();
+    printf("IP Address is %s\r\n", eth.get_ip_address());
+    
+    Thread thread[MAX_UART_PORTS];
+    
+    // Folk thread for each port
+    for(int i=0; i<MAX_UART_PORTS; i++)
+    {
+        if (port_config[i].mode == NET_SERVER_MODE)
+        {
+            thread[i].start(callback(bridge_net_server, &(port_config[i])));
+        }
+        else // if (port_config[i].mode == TCP_CLIENT_MODE)
+        {
+            thread[i].start(callback(bridge_net_client, &(port_config[i])));
+        }
+    }
+
+#ifdef ENABLE_WEB_CONFIG
+    
+    /*** main thread to be a web server for configuration ***/
+    start_httpd();
+
+#endif
+    
+    while(1);
+
+    /* end of main task */    
+    //eth.disconnect();
+}