boards/sam3x-ek/examples/sam3x-ek_http_server/main.c

   1 /**
   2  * \file
   3  * <!--
   4  * This file is part of BeRTOS.
   5  *
   6  * Bertos is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  19  *
  20  * As a special exception, you may use this file as part of a free software
  21  * library without restriction.  Specifically, if other files instantiate
  22  * templates or use macros or inline functions from this file, or you compile
  23  * this file and link it with other files to produce an executable, this
  24  * file does not by itself cause the resulting executable to be covered by
  25  * the GNU General Public License.  This exception does not however
  26  * invalidate any other reasons why the executable file might be covered by
  27  * the GNU General Public License.
  28  *
  29  * Copyright 2011 Develer S.r.l. (http://www.develer.com/)
  30  *
  31  * -->
  32  *
  33  * \author Andrea Righi <arighi@develer.com>
  34  * \author Daniele Basile <asterix@develer.com>
  35  *
  36  * \brief Simple Http server.
  37  *
  38  * This simple web server read the site's pages from SD card, and manage
  39  * the cases where SD is not present or page not found, using embedded pages.
  40  * Quering from browser some cgi page, the server return a json dictionary.
  41  */
  42
  43
  44 #include "bitmaps.h"
  45
  46 #include "hw/hw_http.h"
  47 #include "hw/hw_sd.h"
  48 #include "hw/hw_adc.h"
  49 #include "hw/hw_sdram.h"
  50 #include "hw/hw_led.h"
  51 #include "hw/hw_lcd.h"
  52
  53 // Define logging setting (for cfg/log.h module).
  54 #define LOG_LEVEL         3
  55 #define LOG_VERBOSITY     0
  56 #include <cfg/log.h>
  57 #include <cfg/debug.h>
  58
  59 #include <cpu/irq.h>
  60 #include <cpu/power.h>
  61
  62 #include <drv/timer.h>
  63 #include <drv/ser.h>
  64 #include <drv/sd.h>
  65 #include <drv/dmac_sam3.h>
  66 #include <drv/adc.h>
  67 #include <drv/lcd_hx8347.h>
  68
  69 #include <kern/proc.h>
  70 #include <kern/monitor.h>
  71
  72 #include <net/http.h>
  73
  74 #include <netif/ethernetif.h>
  75
  76 #include <lwip/ip.h>
  77 #include <lwip/ip_addr.h>
  78 #include <lwip/netif.h>
  79 #include <lwip/tcpip.h>
  80 #include <lwip/dhcp.h>
  81
  82 #include <gfx/gfx.h>
  83 #include <gfx/font.h>
  84 #include <gfx/text.h>
  85
  86 #include <fs/fat.h>
  87
  88 #include <icons/bertos.h>
  89
  90 #include <stdlib.h>
  91 #include <stdio.h>
  92 #include <string.h>
  93
  94 /* Macro to unpack the ip addres from lwip format in 4 int*/
  95 #define IP_ADDR_TO_INT_TUPLE(addr) \
  96                 (int)((addr) >>  0 & 0xff), \
  97                 (int)((addr) >>  8 & 0xff), \
  98                 (int)((addr) >> 16 & 0xff), \
  99                 (int)((addr) >> 24 & 0xff)
 100
 101 /* Network interface global variables */
 102 static struct ip_addr ipaddr, netmask, gw;
 103 static struct netif netif;
 104
 105
 106 #define GET_LED_STATUS(status, led_id)     (((status) & BV((led_id))) >> (led_id))
 107 #define CLEAR_LED_STATUS(status, led_id)   ((status) &= ~BV((led_id)))
 108 #define SET_LED_STATUS(status, led_id)     ((status) |= BV((led_id)))
 109
 110 typedef struct BoardStatus
 111 {
 112         char local_ip[sizeof("123.123.123.123")];
 113         char last_connected_ip[sizeof("123.123.123.123")];
 114         uint8_t led_status;
 115         uint16_t internal_temp;
 116         uint32_t up_time;
 117         size_t tot_req;
 118 } BoardStatus;
 119
 120 static BoardStatus status;
 121 static uint8_t raster[RAST_SIZE(LCD_WIDTH, LCD_HEIGHT)];
 122 static Bitmap lcd_bitmap;
 123 extern Font font_gohu;
 124 static int lcd_brightness = LCD_BACKLIGHT_MAX;
 125
 126
 127 static void init(void)
 128 {
 129         /* Enable all the interrupts */
 130         IRQ_ENABLE;
 131
 132         /* Initialize debugging module (allow kprintf(), etc.) */
 133         kdbg_init();
 134         /* Initialize system timer */
 135         timer_init();
 136
 137         /*
 138          * Kernel initialization: processes (allow to create and dispatch
 139          * processes using proc_new()).
 140          */
 141         proc_init();
 142         sdram_init();
 143         dmac_init();
 144         adc_init();
 145
 146         /* Enable the adc to read internal temperature sensor */
 147         hw_enableTempRead();
 148
 149         LED_INIT();
 150
 151         lcd_hx8347_init();
 152         lcd_setBacklight(lcd_brightness);
 153
 154         gfx_bitmapInit(&lcd_bitmap, raster, LCD_WIDTH, LCD_HEIGHT);
 155         gfx_setFont(&lcd_bitmap, &font_luBS14);
 156
 157         lcd_hx8347_blitBitmap(&lcd_bitmap);
 158         lcd_hx8347_blitBitmap24(10, 52, BMP_LOGO_WIDTH, BMP_LOGO_HEIGHT, bmp_logo);
 159         timer_delay(3000);
 160
 161         text_xprintf(&lcd_bitmap, 1, 0, TEXT_CENTER, "Brightness: %d", lcd_brightness);
 162         lcd_hx8347_blitBitmap(&lcd_bitmap);
 163
 164         /* Initialize TCP/IP stack */
 165         tcpip_init(NULL, NULL);
 166
 167         /* Bring up the network interface */
 168         netif_add(&netif, &ipaddr, &netmask, &gw, NULL, ethernetif_init, tcpip_input);
 169         netif_set_default(&netif);
 170         netif_set_up(&netif);
 171
 172 }
 173
 174 static NORETURN void proc_displayRefresh(void)
 175 {
 176         while (1)
 177         {
 178
 179                 //LOG_INFO("Refresh display\n");
 180                 status.internal_temp = hw_convertToDegree(adc_read(ADC_TEMPERATURE_CH));
 181                 status.up_time++;
 182
 183                 timer_delay(1000);
 184         }
 185 }
 186
 187
 188 static uint8_t tx_buf[2048];
 189
 190 /*
 191  * Return a JSON string of board status.
 192  */
 193 static int cgi_status(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 194 {
 195         (void)recv_buf;
 196         (void)recv_len;
 197         (void)name;
 198
 199         status.tot_req++;
 200         uint16_t volt = ADC_RANGECONV(adc_read(1), 0, 3300);
 201         //Update board status.
 202         sprintf(status.last_connected_ip, "%d.%d.%d.%d", IP_ADDR_TO_INT_TUPLE(client->pcb.ip->remote_ip.addr));
 203         sprintf(status.local_ip, "%d.%d.%d.%d", IP_ADDR_TO_INT_TUPLE(client->pcb.ip->local_ip.addr));
 204
 205         sprintf((char *)tx_buf, "{ \"local_ip\":\"%s\",\"last_connected_ip\":\"%s\", \"temp\":%d.%d,\"volt\":%d.%d,\"up_time\":%ld,\"tot_req\":%d, \
 206 \"leds\":{ \"0\":\"%d\", \"1\":\"%d\", \"2\":\"%d\"}}",
 207                                                                 status.local_ip, status.last_connected_ip,
 208                                                                 status.internal_temp / 10, status.internal_temp % 10,
 209                                                                 volt / 1000, volt % 1000,
 210                                                                 status.up_time, status.tot_req,
 211                                                                 GET_LED_STATUS(status.led_status, 0),
 212                                                                 GET_LED_STATUS(status.led_status, 1),
 213                                                                 GET_LED_STATUS(status.led_status, 2));
 214
 215         http_sendOk(client, HTTP_CONTENT_JSON);
 216         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 217         return 0;
 218 }
 219
 220 static int cgi_logo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 221 {
 222         (void)recv_buf;
 223         (void)recv_len;
 224         (void)name;
 225
 226         http_sendOk(client, HTTP_CONTENT_JPEG);
 227         netconn_write(client, bertos_logo_jpg, bertos_logo_jpg_len, NETCONN_NOCOPY);
 228         return 0;
 229 }
 230
 231 /*
 232  * Return the internal micro temperature string.
 233  */
 234 static int cgi_temp(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 235 {
 236         (void)recv_buf;
 237         (void)recv_len;
 238         (void)name;
 239
 240         sprintf((char *)tx_buf, "[%d.%d]", status.internal_temp / 10, status.internal_temp % 10);
 241
 242         http_sendOk(client, HTTP_CONTENT_JSON);
 243         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 244         return 0;
 245 }
 246
 247
 248 /*
 249  * Return the board uptime.
 250  */
 251 static int cgi_uptime(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 252 {
 253         (void)recv_buf;
 254         (void)recv_len;
 255         (void)name;
 256
 257
 258
 259         uint32_t m = status.up_time / 60;
 260         uint32_t h = m / 60;
 261         uint32_t s = status.up_time  - (m * 60) - (h * 3600);
 262
 263         sprintf((char *)tx_buf, "[\"%ldh %ldm %lds\"]", h, m, s);
 264
 265         http_sendOk(client, HTTP_CONTENT_JSON);
 266         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 267         return 0;
 268 }
 269
 270 /*
 271  * Return the VR1 potentiometer voltage.
 272  */
 273 static int cgi_resistor(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 274 {
 275         (void)recv_buf;
 276         (void)recv_len;
 277         (void)name;
 278
 279         uint16_t volt = ADC_RANGECONV(adc_read(1), 0, 3300);
 280         kprintf("volt %d\n", volt);
 281         sprintf((char *)tx_buf, "[ \"%d.%dV\" ]",  volt / 1000, volt % 1000);
 282
 283         http_sendOk(client, HTTP_CONTENT_JSON);
 284         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 285         return 0;
 286 }
 287
 288
 289 #define CGI_LED_ID_KEY    "n"
 290 #define CGI_LED_CMD_KEY   "set"
 291
 292 static char key_value[80];
 293
 294 /*
 295  * Reply to client the request string.
 296  */
 297 static int cgi_led(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 298 {
 299         (void)recv_buf;
 300         (void)recv_len;
 301         (void)name;
 302
 303         char *query_str = strstr(name, "?") + 1;
 304         size_t query_str_len = strlen(query_str);
 305         int led_id;
 306         int led_cmd;
 307
 308         int len = http_tokenizeGetRequest(query_str, query_str_len);
 309
 310         LOG_INFO("Found %d key/value pair\n", len);
 311
 312         if (http_getValue(query_str, query_str_len, CGI_LED_ID_KEY, key_value, sizeof(key_value)) < 0)
 313         {
 314                 LOG_ERR("key %s, not found\n", CGI_LED_ID_KEY);
 315                 goto error;
 316         }
 317
 318         LOG_INFO("Found key %s = %s\n", CGI_LED_ID_KEY, key_value);
 319         led_id = atoi(key_value);
 320
 321
 322         if (http_getValue(query_str, query_str_len, CGI_LED_CMD_KEY, key_value, sizeof(key_value)) < 0)
 323         {
 324                 LOG_ERR("key %s, not found\n", CGI_LED_CMD_KEY);
 325                 goto error;
 326         }
 327
 328         LOG_INFO("Found key %s = %s\n", CGI_LED_CMD_KEY, key_value);
 329         led_cmd = atoi(key_value);
 330
 331         if (led_cmd)
 332         {
 333                 LED_ON(led_id);
 334                 SET_LED_STATUS(status.led_status, led_id);
 335         }
 336         else
 337         {
 338                 LED_OFF(led_id);
 339                 CLEAR_LED_STATUS(status.led_status, led_id);
 340         }
 341
 342         sprintf((char *)tx_buf, "{\"n\":%d, \"set\":,%d}", led_id, led_cmd);
 343
 344         http_sendOk(client, HTTP_CONTENT_JSON);
 345         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 346         return 0;
 347
 348 error:
 349         http_sendInternalErr(client, HTTP_CONTENT_JSON);
 350         return 0;
 351 }
 352
 353 static int cgi_ledStatus(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 354 {
 355         (void)recv_buf;
 356         (void)recv_len;
 357         (void)name;
 358
 359         sprintf((char *)tx_buf, "{ \"0\":\"%d\", \"1\":\"%d\", \"2\":\"%d\"}",
 360                                                                 GET_LED_STATUS(status.led_status, 0),
 361                                                                 GET_LED_STATUS(status.led_status, 1),
 362                                                                 GET_LED_STATUS(status.led_status, 2));
 363
 364         http_sendOk(client, HTTP_CONTENT_JSON);
 365         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 366         return 0;
 367 }
 368
 369 /*
 370  * Reply to client the request string.
 371  */
 372 static int cgi_echo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 373 {
 374         (void)name;
 375
 376         http_sendOk(client, HTTP_CONTENT_PLAIN);
 377         netconn_write(client, recv_buf, recv_len, NETCONN_COPY);
 378         return 0;
 379 }
 380
 381
 382
 383 /*
 384  * Default function that http server call every client request, if it doesn't match a cgi table.
 385  * In this implementation all client request are associate to real file stored on FAT file
 386  * sistem on SD card. If the file there is not on SD card the server reply to client the
 387  * error File not found, and send an harcoded page. In the same way, the server reply
 388  * error page if the SD card is not present.
 389  *
 390  */
 391 static int http_htmPageLoad(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 392 {
 393         (void)recv_buf;
 394         (void)recv_len;
 395
 396         if (SD_CARD_PRESENT())
 397         {
 398
 399                 // SD fat filesystem context
 400                 Sd sd;
 401                 FATFS fs;
 402                 FatFile in_file;
 403                 FRESULT result;
 404
 405                 bool sd_ok = sd_init(&sd, NULL, 0);
 406                 if (sd_ok)
 407                 {
 408                         LOG_INFO("Mount FAT filesystem.\n");
 409                         result = f_mount(0, &fs);
 410                         if (result != FR_OK)
 411                         {
 412                                 LOG_ERR("Mounting FAT volumes error[%d]\n", result);
 413                                 sd_ok = false;
 414                                 f_mount(0, NULL);
 415                         }
 416
 417                         if (sd_ok)
 418                         {
 419                                 result = fatfile_open(&in_file, name,  FA_OPEN_EXISTING | FA_READ);
 420
 421                                 size_t count = 0;
 422                                 if (result == FR_OK)
 423                                 {
 424                                         LOG_INFO("Opened file '%s' size %ld\n", name, in_file.fat_file.fsize);
 425
 426                                         int type = http_searchContentType(name);
 427                                         http_sendOk(client, type);
 428
 429                                         while (count < in_file.fat_file.fsize)
 430                                         {
 431                                                 int len = kfile_read(&in_file.fd, tx_buf, sizeof(tx_buf));
 432                                                 netconn_write(client, tx_buf, len, NETCONN_COPY);
 433                                                 count += len;
 434                                         }
 435
 436                                         kfile_flush(&in_file.fd);
 437                                         kfile_close(&in_file.fd);
 438
 439                                         LOG_INFO("Sent: %d\n", count);
 440                                 }
 441                                 else
 442                                 {
 443                                         LOG_ERR("Unable to open file: '%s' error[%d]\n",  name, result);
 444                                         http_sendFileNotFound(client, HTTP_CONTENT_HTML);
 445                                         netconn_write(client, http_file_not_found, http_file_not_found_len - 1, NETCONN_NOCOPY);
 446                                 }
 447                         }
 448                 }
 449                 f_mount(0, NULL);
 450                 LOG_INFO("Umount FAT filesystem.\n");
 451         }
 452         else
 453         {
 454                 http_sendFileNotFound(client, HTTP_CONTENT_HTML);
 455                 netconn_write(client, http_sd_not_present, http_sd_not_present_len, NETCONN_NOCOPY);
 456         }
 457
 458         return 0;
 459 }
 460
 461 /*
 462  * Return to client a string that display the CHIP ID information.
 463  * See datasheet for more detail.
 464  */
 465 static int cgi_chipInfo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 466 {
 467         (void)recv_buf;
 468         (void)recv_len;
 469         (void)name;
 470
 471         sprintf((char *)tx_buf, "{ \"core_name\":\"%s\", \"arch_name\":\"%s\", \"sram_size\":\"%s\",\"flash_size\":\"%s\", \"mem_boot_type\":\"%s\" }",
 472                                                 chipid_eproc_name(CHIPID_EPRCOC()),
 473                                                 chipid_archnames(CHIPID_ARCH()),
 474                                                 chipid_sramsize(CHIPID_SRAMSIZ()),
 475                                                 chipid_nvpsize(CHIPID_NVPSIZ()),
 476                                                 chipid_nvptype(CHIPID_NVTYP()));
 477
 478         http_sendOk(client, HTTP_CONTENT_JSON);
 479         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 480
 481         return 0;
 482 }
 483
 484
 485 static int cgi_error(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 486 {
 487         (void)client;
 488         (void)name;
 489         (void)recv_buf;
 490         (void)recv_len;
 491
 492         return -1;
 493 }
 494
 495 /*
 496  * Static cgi table where we associate callback to page.
 497  */
 498 static HttpCGI cgi_table[] =
 499 {
 500         { CGI_MATCH_WORD, "echo",                cgi_echo          },
 501         { CGI_MATCH_NAME, "get_temperature",     cgi_temp          },
 502         { CGI_MATCH_NAME, "get_uptime",          cgi_uptime        },
 503         { CGI_MATCH_NAME, "get_resistor",        cgi_resistor      },
 504         { CGI_MATCH_NAME, "set_led",             cgi_led           },
 505         { CGI_MATCH_NAME, "get_ledStatus",       cgi_ledStatus     },
 506         { CGI_MATCH_NAME, "error",               cgi_error         },
 507         { CGI_MATCH_WORD, "status",              cgi_status        },
 508         { CGI_MATCH_NAME, "get_chipinfo",        cgi_chipInfo      },
 509         { CGI_MATCH_NAME, "bertos_logo_jpg",     cgi_logo          },
 510         { CGI_MATCH_NONE,  NULL,                 NULL              }
 511 };
 512
 513
 514 int main(void)
 515 {
 516         struct netconn *server;
 517
 518         /* Hardware initialization */
 519         init();
 520         http_init(http_htmPageLoad, cgi_table);
 521
 522         proc_new(proc_displayRefresh, NULL, KERN_MINSTACKSIZE * 2, NULL);
 523
 524         dhcp_start(&netif);
 525         while (!netif.ip_addr.addr)
 526                 timer_delay(DHCP_FINE_TIMER_MSECS);
 527         kprintf("dhcp ok: ip = %d.%d.%d.%d\n", IP_ADDR_TO_INT_TUPLE(netif.ip_addr.addr));
 528
 529         server = netconn_new(NETCONN_TCP);
 530         netconn_bind(server, IP_ADDR_ANY, 80);
 531         netconn_listen(server);
 532
 533         while (1)
 534         {
 535                 http_poll(server);
 536         }
 537 }