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 #include <struct/heap.h>
  72
  73 #include <net/http.h>
  74
  75 #include <netif/ethernetif.h>
  76
  77 #include <lwip/ip.h>
  78 #include <lwip/ip_addr.h>
  79 #include <lwip/netif.h>
  80 #include <lwip/tcpip.h>
  81 #include <lwip/dhcp.h>
  82
  83 #include <gfx/gfx.h>
  84 #include <gfx/font.h>
  85 #include <gfx/text.h>
  86
  87 #include <fs/fat.h>
  88
  89 #include <icons/bertos.h>
  90
  91 #include <stdlib.h>
  92 #include <stdio.h>
  93 #include <string.h>
  94
  95 /* Macro to unpack the ip addres from lwip format in 4 int*/
  96 #define IP_ADDR_TO_INT_TUPLE(addr) \
  97                 (int)((addr) >>  0 & 0xff), \
  98                 (int)((addr) >>  8 & 0xff), \
  99                 (int)((addr) >> 16 & 0xff), \
 100                 (int)((addr) >> 24 & 0xff)
 101
 102 /* Network interface global variables */
 103 static struct ip_addr ipaddr, netmask, gw;
 104 static struct netif netif;
 105
 106
 107 #define GET_LED_STATUS(status, led_id)     (((status) & BV((led_id))) >> (led_id))
 108 #define CLEAR_LED_STATUS(status, led_id)   ((status) &= ~BV((led_id)))
 109 #define SET_LED_STATUS(status, led_id)     ((status) |= BV((led_id)))
 110
 111 typedef struct BoardStatus
 112 {
 113         char local_ip[sizeof("123.123.123.123")];
 114         char last_connected_ip[sizeof("123.123.123.123")];
 115         uint8_t led_status;
 116         uint16_t internal_temp;
 117         uint32_t up_time;
 118         size_t tot_req;
 119 } BoardStatus;
 120
 121 static BoardStatus status;
 122 static uint8_t raster[RAST_SIZE(LCD_WIDTH, LCD_HEIGHT)];
 123 static Bitmap *lcd_bitmap;
 124 extern Font font_gohu;
 125 static int lcd_brightness = LCD_BACKLIGHT_MAX;
 126 static struct Heap heap;
 127
 128
 129 static void init(void)
 130 {
 131         /* Enable all the interrupts */
 132         IRQ_ENABLE;
 133
 134         /* Initialize debugging module (allow kprintf(), etc.) */
 135         kdbg_init();
 136         /* Initialize system timer */
 137         timer_init();
 138
 139         /*
 140          * Kernel initialization: processes (allow to create and dispatch
 141          * processes using proc_new()).
 142          */
 143         proc_init();
 144         sdram_init();
 145         dmac_init();
 146         adc_init();
 147
 148         /* Enable the adc to read internal temperature sensor */
 149         hw_enableTempRead();
 150         LED_INIT();
 151
 152         heap_init(&heap, (void *)SDRAM_BASE, SDRAM_SIZE);
 153         lcd_bitmap = heap_allocmem(&heap, RAST_SIZE(LCD_WIDTH, LCD_HEIGHT));
 154         if (lcd_bitmap)
 155                 kprintf("Allocated memory for display raster, addr 0x%x\n", (unsigned)lcd_bitmap);
 156         else
 157         {
 158                 kprintf("Error allocating memory for LCD raster!\n");
 159         }
 160
 161         lcd_hx8347_init();
 162         lcd_setBacklight(lcd_brightness);
 163
 164         gfx_bitmapInit(lcd_bitmap, raster, LCD_WIDTH, LCD_HEIGHT);
 165         gfx_setFont(lcd_bitmap, &font_luBS14);
 166         lcd_hx8347_blitBitmap(lcd_bitmap);
 167
 168         /* Initialize TCP/IP stack */
 169         tcpip_init(NULL, NULL);
 170
 171         /* Bring up the network interface */
 172         netif_add(&netif, &ipaddr, &netmask, &gw, NULL, ethernetif_init, tcpip_input);
 173         netif_set_default(&netif);
 174         netif_set_up(&netif);
 175
 176         lcd_hx8347_blitBitmap24(10, 52, BMP_LOGO_WIDTH, BMP_LOGO_HEIGHT, bmp_logo);
 177         timer_delay(3000);
 178 }
 179
 180 static NORETURN void proc_displayRefresh(void)
 181 {
 182         while (1)
 183         {
 184
 185                 //LOG_INFO("Refresh display\n");
 186                 status.internal_temp = hw_convertToDegree(adc_read(ADC_TEMPERATURE_CH));
 187                 status.up_time++;
 188
 189                 timer_delay(1000);
 190         }
 191 }
 192
 193
 194 static uint8_t tx_buf[2048];
 195
 196 /*
 197  * Return a JSON string of board status.
 198  */
 199 static int cgi_status(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 200 {
 201         (void)recv_buf;
 202         (void)recv_len;
 203         (void)name;
 204
 205         status.tot_req++;
 206         uint16_t volt = ADC_RANGECONV(adc_read(1), 0, 3300);
 207         //Update board status.
 208         sprintf(status.last_connected_ip, "%d.%d.%d.%d", IP_ADDR_TO_INT_TUPLE(client->pcb.ip->remote_ip.addr));
 209         sprintf(status.local_ip, "%d.%d.%d.%d", IP_ADDR_TO_INT_TUPLE(client->pcb.ip->local_ip.addr));
 210
 211         sprintf((char *)tx_buf, "{ \"local_ip\":\"%s\",\"last_connected_ip\":\"%s\", \"temp\":%d.%d,\"volt\":%d.%d,\"up_time\":%ld,\"tot_req\":%d, \
 212 \"leds\":{ \"0\":\"%d\", \"1\":\"%d\", \"2\":\"%d\"}}",
 213                                                                 status.local_ip, status.last_connected_ip,
 214                                                                 status.internal_temp / 10, status.internal_temp % 10,
 215                                                                 volt / 1000, volt % 1000,
 216                                                                 status.up_time, status.tot_req,
 217                                                                 GET_LED_STATUS(status.led_status, 0),
 218                                                                 GET_LED_STATUS(status.led_status, 1),
 219                                                                 GET_LED_STATUS(status.led_status, 2));
 220
 221         http_sendOk(client, HTTP_CONTENT_JSON);
 222         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 223         return 0;
 224 }
 225
 226 static int cgi_logo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 227 {
 228         (void)recv_buf;
 229         (void)recv_len;
 230         (void)name;
 231
 232         http_sendOk(client, HTTP_CONTENT_JPEG);
 233         netconn_write(client, bertos_logo_jpg, bertos_logo_jpg_len, NETCONN_NOCOPY);
 234         return 0;
 235 }
 236
 237 /*
 238  * Return the internal micro temperature string.
 239  */
 240 static int cgi_temp(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 241 {
 242         (void)recv_buf;
 243         (void)recv_len;
 244         (void)name;
 245
 246         sprintf((char *)tx_buf, "[%d.%d]", status.internal_temp / 10, status.internal_temp % 10);
 247
 248         http_sendOk(client, HTTP_CONTENT_JSON);
 249         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 250         return 0;
 251 }
 252
 253
 254 /*
 255  * Return the board uptime.
 256  */
 257 static int cgi_uptime(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 258 {
 259         (void)recv_buf;
 260         (void)recv_len;
 261         (void)name;
 262
 263
 264
 265         uint32_t m = status.up_time / 60;
 266         uint32_t h = m / 60;
 267         uint32_t s = status.up_time  - (m * 60) - (h * 3600);
 268
 269         sprintf((char *)tx_buf, "[\"%ldh %ldm %lds\"]", h, m, s);
 270
 271         http_sendOk(client, HTTP_CONTENT_JSON);
 272         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 273         return 0;
 274 }
 275
 276 /*
 277  * Return the VR1 potentiometer voltage.
 278  */
 279 static int cgi_resistor(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 280 {
 281         (void)recv_buf;
 282         (void)recv_len;
 283         (void)name;
 284
 285         uint16_t volt = ADC_RANGECONV(adc_read(1), 0, 3300);
 286         kprintf("volt %d\n", volt);
 287         sprintf((char *)tx_buf, "[ \"%d.%dV\" ]",  volt / 1000, volt % 1000);
 288
 289         http_sendOk(client, HTTP_CONTENT_JSON);
 290         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 291         return 0;
 292 }
 293
 294
 295 #define CGI_LED_ID_KEY    "n"
 296 #define CGI_LED_CMD_KEY   "set"
 297
 298 static char key_value[80];
 299
 300 /*
 301  * Reply to client the request string.
 302  */
 303 static int cgi_led(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 304 {
 305         (void)recv_buf;
 306         (void)recv_len;
 307         (void)name;
 308
 309         char *query_str = strstr(name, "?") + 1;
 310         size_t query_str_len = strlen(query_str);
 311         int led_id;
 312         int led_cmd;
 313
 314         int len = http_tokenizeGetRequest(query_str, query_str_len);
 315
 316         LOG_INFO("Found %d key/value pair\n", len);
 317
 318         if (http_getValue(query_str, query_str_len, CGI_LED_ID_KEY, key_value, sizeof(key_value)) < 0)
 319         {
 320                 LOG_ERR("key %s, not found\n", CGI_LED_ID_KEY);
 321                 goto error;
 322         }
 323
 324         LOG_INFO("Found key %s = %s\n", CGI_LED_ID_KEY, key_value);
 325         led_id = atoi(key_value);
 326
 327
 328         if (http_getValue(query_str, query_str_len, CGI_LED_CMD_KEY, key_value, sizeof(key_value)) < 0)
 329         {
 330                 LOG_ERR("key %s, not found\n", CGI_LED_CMD_KEY);
 331                 goto error;
 332         }
 333
 334         LOG_INFO("Found key %s = %s\n", CGI_LED_CMD_KEY, key_value);
 335         led_cmd = atoi(key_value);
 336
 337         if (led_cmd)
 338         {
 339                 LED_ON(led_id);
 340                 SET_LED_STATUS(status.led_status, led_id);
 341         }
 342         else
 343         {
 344                 LED_OFF(led_id);
 345                 CLEAR_LED_STATUS(status.led_status, led_id);
 346         }
 347
 348         sprintf((char *)tx_buf, "{\"n\":%d, \"set\":,%d}", led_id, led_cmd);
 349
 350         http_sendOk(client, HTTP_CONTENT_JSON);
 351         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 352         return 0;
 353
 354 error:
 355         http_sendInternalErr(client, HTTP_CONTENT_JSON);
 356         return 0;
 357 }
 358
 359 static int cgi_ledStatus(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 360 {
 361         (void)recv_buf;
 362         (void)recv_len;
 363         (void)name;
 364
 365         sprintf((char *)tx_buf, "{ \"0\":\"%d\", \"1\":\"%d\", \"2\":\"%d\"}",
 366                                                                 GET_LED_STATUS(status.led_status, 0),
 367                                                                 GET_LED_STATUS(status.led_status, 1),
 368                                                                 GET_LED_STATUS(status.led_status, 2));
 369
 370         http_sendOk(client, HTTP_CONTENT_JSON);
 371         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 372         return 0;
 373 }
 374
 375 /*
 376  * Reply to client the request string.
 377  */
 378 static int cgi_echo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 379 {
 380         (void)name;
 381
 382         http_sendOk(client, HTTP_CONTENT_PLAIN);
 383         netconn_write(client, recv_buf, recv_len, NETCONN_COPY);
 384         return 0;
 385 }
 386
 387
 388
 389 /*
 390  * Default function that http server call every client request, if it doesn't match a cgi table.
 391  * In this implementation all client request are associate to real file stored on FAT file
 392  * sistem on SD card. If the file there is not on SD card the server reply to client the
 393  * error File not found, and send an harcoded page. In the same way, the server reply
 394  * error page if the SD card is not present.
 395  *
 396  */
 397 static int http_htmPageLoad(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 398 {
 399         (void)recv_buf;
 400         (void)recv_len;
 401
 402         if (SD_CARD_PRESENT())
 403         {
 404
 405                 // SD fat filesystem context
 406                 Sd sd;
 407                 FATFS fs;
 408                 FatFile in_file;
 409                 FRESULT result;
 410
 411                 bool sd_ok = sd_init(&sd, NULL, 0);
 412                 if (sd_ok)
 413                 {
 414                         LOG_INFO("Mount FAT filesystem.\n");
 415                         result = f_mount(0, &fs);
 416                         if (result != FR_OK)
 417                         {
 418                                 LOG_ERR("Mounting FAT volumes error[%d]\n", result);
 419                                 sd_ok = false;
 420                                 f_mount(0, NULL);
 421                         }
 422
 423                         if (sd_ok)
 424                         {
 425                                 result = fatfile_open(&in_file, name,  FA_OPEN_EXISTING | FA_READ);
 426
 427                                 size_t count = 0;
 428                                 if (result == FR_OK)
 429                                 {
 430                                         LOG_INFO("Opened file '%s' size %ld\n", name, in_file.fat_file.fsize);
 431
 432                                         int type = http_searchContentType(name);
 433                                         http_sendOk(client, type);
 434
 435                                         while (count < in_file.fat_file.fsize)
 436                                         {
 437                                                 int len = kfile_read(&in_file.fd, tx_buf, sizeof(tx_buf));
 438                                                 netconn_write(client, tx_buf, len, NETCONN_COPY);
 439                                                 count += len;
 440                                         }
 441
 442                                         kfile_flush(&in_file.fd);
 443                                         kfile_close(&in_file.fd);
 444
 445                                         LOG_INFO("Sent: %d\n", count);
 446                                 }
 447                                 else
 448                                 {
 449                                         LOG_ERR("Unable to open file: '%s' error[%d]\n",  name, result);
 450                                         http_sendFileNotFound(client, HTTP_CONTENT_HTML);
 451                                         netconn_write(client, http_file_not_found, http_file_not_found_len - 1, NETCONN_NOCOPY);
 452                                 }
 453                         }
 454                 }
 455                 f_mount(0, NULL);
 456                 LOG_INFO("Umount FAT filesystem.\n");
 457         }
 458         else
 459         {
 460                 http_sendFileNotFound(client, HTTP_CONTENT_HTML);
 461                 netconn_write(client, http_sd_not_present, http_sd_not_present_len, NETCONN_NOCOPY);
 462         }
 463
 464         return 0;
 465 }
 466
 467 /*
 468  * Return to client a string that display the CHIP ID information.
 469  * See datasheet for more detail.
 470  */
 471 static int cgi_chipInfo(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 472 {
 473         (void)recv_buf;
 474         (void)recv_len;
 475         (void)name;
 476
 477         sprintf((char *)tx_buf, "{ \"core_name\":\"%s\", \"arch_name\":\"%s\", \"sram_size\":\"%s\",\"flash_size\":\"%s\", \"mem_boot_type\":\"%s\" }",
 478                                                 chipid_eproc_name(CHIPID_EPRCOC()),
 479                                                 chipid_archnames(CHIPID_ARCH()),
 480                                                 chipid_sramsize(CHIPID_SRAMSIZ()),
 481                                                 chipid_nvpsize(CHIPID_NVPSIZ()),
 482                                                 chipid_nvptype(CHIPID_NVTYP()));
 483
 484         http_sendOk(client, HTTP_CONTENT_JSON);
 485         netconn_write(client, tx_buf, strlen((char *)tx_buf), NETCONN_COPY);
 486
 487         return 0;
 488 }
 489
 490
 491 static int cgi_error(struct netconn *client, const char *name, char *recv_buf, size_t recv_len)
 492 {
 493         (void)client;
 494         (void)name;
 495         (void)recv_buf;
 496         (void)recv_len;
 497
 498         return -1;
 499 }
 500
 501 /*
 502  * Static cgi table where we associate callback to page.
 503  */
 504 static HttpCGI cgi_table[] =
 505 {
 506         { CGI_MATCH_WORD, "echo",                cgi_echo          },
 507         { CGI_MATCH_NAME, "get_temperature",     cgi_temp          },
 508         { CGI_MATCH_NAME, "get_uptime",          cgi_uptime        },
 509         { CGI_MATCH_NAME, "get_resistor",        cgi_resistor      },
 510         { CGI_MATCH_NAME, "set_led",             cgi_led           },
 511         { CGI_MATCH_NAME, "get_ledStatus",       cgi_ledStatus     },
 512         { CGI_MATCH_NAME, "error",               cgi_error         },
 513         { CGI_MATCH_WORD, "status",              cgi_status        },
 514         { CGI_MATCH_NAME, "get_chipinfo",        cgi_chipInfo      },
 515         { CGI_MATCH_NAME, "bertos_logo_jpg",     cgi_logo          },
 516         { CGI_MATCH_NONE,  NULL,                 NULL              }
 517 };
 518
 519
 520 int main(void)
 521 {
 522         struct netconn *server;
 523
 524         /* Hardware initialization */
 525         init();
 526         http_init(http_htmPageLoad, cgi_table);
 527
 528         proc_new(proc_displayRefresh, NULL, KERN_MINSTACKSIZE * 2, NULL);
 529
 530         dhcp_start(&netif);
 531         while (!netif.ip_addr.addr)
 532                 timer_delay(DHCP_FINE_TIMER_MSECS);
 533         kprintf("dhcp ok: ip = %d.%d.%d.%d\n", IP_ADDR_TO_INT_TUPLE(netif.ip_addr.addr));
 534
 535         server = netconn_new(NETCONN_TCP);
 536         netconn_bind(server, IP_ADDR_ANY, 80);
 537         netconn_listen(server);
 538
 539         while (1)
 540         {
 541                 http_poll(server);
 542         }
 543 }