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                                                                 status.local_ip, status.last_connected_ip,
 207                                                                 status.internal_temp / 10, status.internal_temp % 10,
 208                                                                 volt / 1000, volt % 1000,
 209                                                                 status.up_time, status.tot_req);
 210
 211
 212
 213         http_sendOk(client, HTTP_CONTENT_JSON);
 214         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 215         return 0;
 216 }
 217
 218 static int cgi_logo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 219 {
 220         (void)recv_buf;
 221         (void)recv_len;
 222         (void)name;
 223
 224         http_sendOk(client, HTTP_CONTENT_JPEG);
 225         netconn_write(client, bertos_logo_jpg, bertos_logo_jpg_len, NETCONN_NOCOPY);
 226         return 0;
 227 }
 228
 229 /*
 230  * Return the internal micro temperature string.
 231  */
 232 static int cgi_temp(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 233 {
 234         (void)recv_buf;
 235         (void)recv_len;
 236         (void)name;
 237
 238         sprintf((char *)tx_buf, "[%d.%d]", status.internal_temp / 10, status.internal_temp % 10);
 239
 240         http_sendOk(client, HTTP_CONTENT_JSON);
 241         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 242         return 0;
 243 }
 244
 245
 246 /*
 247  * Return the board uptime.
 248  */
 249 static int cgi_uptime(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 250 {
 251         (void)recv_buf;
 252         (void)recv_len;
 253         (void)name;
 254
 255
 256
 257         uint32_t m = status.up_time / 60;
 258         uint32_t h = m / 60;
 259         uint32_t s = status.up_time  - (m * 60) - (h * 3600);
 260
 261         sprintf((char *)tx_buf, "[\"%ldh %ldm %lds\"]", h, m, s);
 262
 263         http_sendOk(client, HTTP_CONTENT_JSON);
 264         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 265         return 0;
 266 }
 267
 268 /*
 269  * Return the VR1 potentiometer voltage.
 270  */
 271 static int cgi_resistor(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 272 {
 273         (void)recv_buf;
 274         (void)recv_len;
 275         (void)name;
 276
 277         uint16_t volt = ADC_RANGECONV(adc_read(1), 0, 3300);
 278         kprintf("volt %d\n", volt);
 279         sprintf((char *)tx_buf, "[ \"%d.%dV\" ]",  volt / 1000, volt % 1000);
 280
 281         http_sendOk(client, HTTP_CONTENT_JSON);
 282         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 283         return 0;
 284 }
 285
 286
 287 #define CGI_LED_ID_KEY    "n"
 288 #define CGI_LED_CMD_KEY   "set"
 289
 290 static char key_value[80];
 291
 292 /*
 293  * Reply to client the request string.
 294  */
 295 static int cgi_led(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 296 {
 297         (void)recv_buf;
 298         (void)recv_len;
 299         (void)name;
 300
 301         char *query_str = strstr(name, "?") + 1;
 302         size_t query_str_len = strlen(query_str);
 303         int led_id;
 304         int led_cmd;
 305
 306         int len = http_tokenizeGetRequest(query_str, query_str_len);
 307
 308         LOG_INFO("Found %d key/value pair\n", len);
 309
 310         if (http_getValue(query_str, query_str_len, CGI_LED_ID_KEY, key_value, sizeof(key_value)) < 0)
 311         {
 312                 LOG_ERR("key %s, not found\n", CGI_LED_ID_KEY);
 313                 goto error;
 314         }
 315
 316         LOG_INFO("Found key %s = %s\n", CGI_LED_ID_KEY, key_value);
 317         led_id = atoi(key_value);
 318
 319
 320         if (http_getValue(query_str, query_str_len, CGI_LED_CMD_KEY, key_value, sizeof(key_value)) < 0)
 321         {
 322                 LOG_ERR("key %s, not found\n", CGI_LED_CMD_KEY);
 323                 goto error;
 324         }
 325
 326         LOG_INFO("Found key %s = %s\n", CGI_LED_CMD_KEY, key_value);
 327         led_cmd = atoi(key_value);
 328
 329         if (led_cmd)
 330         {
 331                 LED_ON(led_id);
 332                 SET_LED_STATUS(status.led_status, led_id);
 333         }
 334         else
 335         {
 336                 LED_OFF(led_id);
 337                 CLEAR_LED_STATUS(status.led_status, led_id);
 338         }
 339
 340         sprintf((char *)tx_buf, "{\"n\":%d, \"set\":,%d}", led_id, led_cmd);
 341
 342         http_sendOk(client, HTTP_CONTENT_JSON);
 343         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 344         return 0;
 345
 346 error:
 347         http_sendInternalErr(client, HTTP_CONTENT_JSON);
 348         return 0;
 349 }
 350
 351 static int cgi_ledStatus(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 352 {
 353         (void)recv_buf;
 354         (void)recv_len;
 355         (void)name;
 356
 357         sprintf((char *)tx_buf, "{ \"0\":\"%d\", \"1\":\"%d\", \"2\":\"%d\"}",
 358                                                                 GET_LED_STATUS(status.led_status, 0),
 359                                                                 GET_LED_STATUS(status.led_status, 1),
 360                                                                 GET_LED_STATUS(status.led_status, 2));
 361
 362         http_sendOk(client, HTTP_CONTENT_JSON);
 363         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 364         return 0;
 365 }
 366
 367 /*
 368  * Reply to client the request string.
 369  */
 370 static int cgi_echo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 371 {
 372         (void)name;
 373
 374         http_sendOk(client, HTTP_CONTENT_PLAIN);
 375         netconn_write(client, recv_buf, recv_len, NETCONN_COPY);
 376         return 0;
 377 }
 378
 379
 380
 381 /*
 382  * Default function that http server call every client request, if it doesn't match a cgi table.
 383  * In this implementation all client request are associate to real file stored on FAT file
 384  * sistem on SD card. If the file there is not on SD card the server reply to client the
 385  * error File not found, and send an harcoded page. In the same way, the server reply
 386  * error page if the SD card is not present.
 387  *
 388  */
 389 static int http_htmPageLoad(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 390 {
 391         (void)recv_buf;
 392         (void)recv_len;
 393
 394         if (SD_CARD_PRESENT())
 395         {
 396
 397                 // SD fat filesystem context
 398                 Sd sd;
 399                 FATFS fs;
 400                 FatFile in_file;
 401                 FRESULT result;
 402
 403                 bool sd_ok = sd_init(&sd, NULL, 0);
 404                 if (sd_ok)
 405                 {
 406                         LOG_INFO("Mount FAT filesystem.\n");
 407                         result = f_mount(0, &fs);
 408                         if (result != FR_OK)
 409                         {
 410                                 LOG_ERR("Mounting FAT volumes error[%d]\n", result);
 411                                 sd_ok = false;
 412                                 f_mount(0, NULL);
 413                         }
 414
 415                         if (sd_ok)
 416                         {
 417                                 result = fatfile_open(&in_file, name,  FA_OPEN_EXISTING | FA_READ);
 418
 419                                 size_t count = 0;
 420                                 if (result == FR_OK)
 421                                 {
 422                                         LOG_INFO("Opened file '%s' size %ld\n", name, in_file.fat_file.fsize);
 423
 424                                         int type = http_searchContentType(name);
 425                                         http_sendOk(client, type);
 426
 427                                         while (count < in_file.fat_file.fsize)
 428                                         {
 429                                                 int len = kfile_read(&in_file.fd, tx_buf, sizeof(tx_buf));
 430                                                 netconn_write(client, tx_buf, len, NETCONN_COPY);
 431                                                 count += len;
 432                                         }
 433
 434                                         kfile_flush(&in_file.fd);
 435                                         kfile_close(&in_file.fd);
 436
 437                                         LOG_INFO("Sent: %d\n", count);
 438                                 }
 439                                 else
 440                                 {
 441                                         LOG_ERR("Unable to open file: '%s' error[%d]\n",  name, result);
 442                                         http_sendFileNotFound(client, HTTP_CONTENT_HTML);
 443                                         netconn_write(client, http_file_not_found, http_file_not_found_len - 1, NETCONN_NOCOPY);
 444                                 }
 445                         }
 446                 }
 447                 f_mount(0, NULL);
 448                 LOG_INFO("Umount FAT filesystem.\n");
 449         }
 450         else
 451         {
 452                 http_sendFileNotFound(client, HTTP_CONTENT_HTML);
 453                 netconn_write(client, http_sd_not_present, http_sd_not_present_len, NETCONN_NOCOPY);
 454         }
 455
 456         return 0;
 457 }
 458
 459 /*
 460  * Return to client a string that display the CHIP ID information.
 461  * See datasheet for more detail.
 462  */
 463 static int cgi_chipInfo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 464 {
 465         (void)recv_buf;
 466         (void)recv_len;
 467         (void)name;
 468
 469         sprintf((char *)tx_buf, "{ \"core_name\":\"%s\", \"arch_name\":\"%s\", \"sram_size\":\"%s\",\"flash_size\":\"%s\", \"mem_boot_type\":\"%s\" }",
 470                                                 chipid_eproc_name(CHIPID_EPRCOC()),
 471                                                 chipid_archnames(CHIPID_ARCH()),
 472                                                 chipid_sramsize(CHIPID_SRAMSIZ()),
 473                                                 chipid_nvpsize(CHIPID_NVPSIZ()),
 474                                                 chipid_nvptype(CHIPID_NVTYP()));
 475
 476         http_sendOk(client, HTTP_CONTENT_JSON);
 477         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 478
 479         return 0;
 480 }
 481
 482
 483 static int cgi_error(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 484 {
 485         (void)client;
 486         (void)name;
 487         (void)recv_buf;
 488         (void)recv_len;
 489
 490         return -1;
 491 }
 492
 493 /*
 494  * Static cgi table where we associate callback to page.
 495  */
 496 static HttpCGI cgi_table[] =
 497 {
 498         { CGI_MATCH_WORD, "echo",                cgi_echo          },
 499         { CGI_MATCH_NAME, "get_temperature",     cgi_temp          },
 500         { CGI_MATCH_NAME, "get_uptime",          cgi_uptime        },
 501         { CGI_MATCH_NAME, "get_resistor",        cgi_resistor      },
 502         { CGI_MATCH_NAME, "set_led",             cgi_led           },
 503         { CGI_MATCH_NAME, "get_ledStatus",       cgi_ledStatus     },
 504         { CGI_MATCH_NAME, "error",               cgi_error         },
 505         { CGI_MATCH_WORD, "status",              cgi_status        },
 506         { CGI_MATCH_NAME, "get_chipinfo",        cgi_chipInfo      },
 507         { CGI_MATCH_NAME, "bertos_logo_jpg",     cgi_logo          },
 508         { CGI_MATCH_NONE,  NULL,                 NULL              }
 509 };
 510
 511
 512 int main(void)
 513 {
 514         struct netconn *server;
 515
 516         /* Hardware initialization */
 517         init();
 518         http_init(http_htmPageLoad, cgi_table);
 519
 520         proc_new(proc_displayRefresh, NULL, KERN_MINSTACKSIZE * 2, NULL);
 521
 522         dhcp_start(&netif);
 523         while (!netif.ip_addr.addr)
 524                 timer_delay(DHCP_FINE_TIMER_MSECS);
 525         kprintf("dhcp ok: ip = %d.%d.%d.%d\n", IP_ADDR_TO_INT_TUPLE(netif.ip_addr.addr));
 526
 527         server = netconn_new(NETCONN_TCP);
 528         netconn_bind(server, IP_ADDR_ANY, 80);
 529         netconn_listen(server);
 530
 531         while (1)
 532         {
 533                 http_poll(server);
 534         }
 535 }