【跃昉科技BF2开发板试用体验】三、lf686_demo_wifi例程及其代码分析

本文来源电子发烧友社区，作者：赵杰， 帖子地址：https://bbs.elecfans.com/jishu_2293164_1_1.html


拿到跃昉科技BF2开发板有段时间，前面测试了一个demo后停了一段时间，虽然跃昉的技术支持很到位，但是整体感觉这款开发板应用过程中有很多的限制，因此也耽搁下来了。
当初申请这块板子的时候也是想测试WiFi的，但是尝试了几次感觉其使用方面不太方便，尤其是代码编写方面，感觉很复杂，因此先完成其WiFi的Demo测试，即Customer_App下的lf686_demo_wifi例程。
一、代码编译及下载
使用VSCode查看代码，并用MSYS2编译的，由于没改什么核心代码，编译也比较简单。
1、在msys2中进入到lf686_demo_wifi目录后，输入./genromap进行编译

正常情况下，直接完成编译

生成后的文件在该目录的build_out目录下。
2、在tools目录下的flash_tools中打开LFFlashEnv进行烧写
选择前面build_out目录下的Bin文件

烧写时需要把IO8拉到HI，然后复位后下载

三、运行结果
打开串口sscom，设置波特率2000000，就能获得启动过程中的信息，也是cli输入命令的窗口

启动信息部分之后，是系统初始化信息，即system_init信息

然后是lf_flash的分区信息

hal_board信息

后面是核心任务信息

后面是当前任务列表和启动环境信息

后面是usart初始化和wifi初始化相关信息

在串口sscom中输入help，可得到相关的支持命令

1. ====Support 4 cmds once, seperate by ; ====
2. help : print this
3. p : print memory
4. m : modify memory
5. echo : echo for command
6. exit : close CLI
7. devname : print device name
8. sysver : system version
9. reboot : reboot system
10. poweroff : poweroff system
11. reset : system reset
12. time : system time
13. ota : system ota
14. ps : thread dump
15. ls : file list
16. hexdump : dump file
17. cat : cat file
19. ====User Commands====
20. aws : aws iot demo
21. pka : pka iot demo
22. wifi : wifi
23. sha : sha iot demo
24. trng : trng test
25. aes : trng test
26. cks : cks test
27. dma : dma test
28. exception_load : exception load test
29. exception_l_illegal : exception load test
30. exception_store : exception store test
31. exception_inst_illegal : exception illegal instruction
32. stack_wifi : Wi-Fi Stack
33. http : http client download test based on socket
34. httpc : http client download test based on RAW TCP
35. coex_dump : coex dump
36. rf_dump : rf dump
37. wifi_ap_bcnint_set : wifi ap bcnin set
38. wifi_capcode : wifi capcode
39. wifi_scan : wifi scan
40. wifi_scan_filter : wifi scan
41. wifi_mon : wifi monitor
42. wifi_raw_send : wifi raw send test
43. wifi_sta_info : wifi sta info
44. wifi_sta_ip_set : wifi STA IP config [ip] [mask] [gw] [dns1] [dns2]
45. wifi_sta_ip_unset : wifi STA IP config unset
46. wifi_sta_disconnect : wifi station disconnect
47. wifi_sta_connect : wifi station connect
48. wifi_sta_get_state : wifi sta get state
49. wifi_sta_autoconnect_enable: wifi station enable auto reconnect
50. wifi_sta_autoconnect_disable: wifi station disable auto reconnect
51. rc_fix_en : wifi rate control fixed rate enable
52. rc_fix_dis : wifi rate control fixed rate diable
53. wifi_sta_ps_on : wifi power saving mode ON
54. wifi_sta_ps_off : wifi power saving mode OFF
55. wifi_sta_denoise_enable: wifi denoise
56. wifi_sta_denoise_disable : wifi denoise
57. wifi_sniffer_on : wifi sniffer mode on
58. wifi_sniffer_off : wifi sniffer mode off
59. wifi_ap_start : start Ap mode
60. wifi_ap_stop : stop Ap mode
61. wifi_ap_conf_max_sta : config Ap max sta
62. wifi_dump : dump fw statistic
63. wifi_cfg : wifi cfg cmd
64. wifi_mib : dump mib statistic
65. wifi_pkt : wifi dump needed
66. wifi_coex_rf_force_on : wifi coex RF forece on
67. wifi_coex_rf_force_off : wifi coex RF forece off
68. wifi_coex_pti_force_on : wifi coex PTI forece on
69. wifi_coex_pti_force_off: wifi coex PTI forece off
70. wifi_coex_pta_force_on : wifi coex PTA forece on
71. wifi_coex_pta_force_off: wifi coex PTA forece off
72. wifi_sta_list : get sta list in AP mode
73. wifi_sta_del : delete one sta in AP mode
74. wifi_edca_dump : dump EDCA data
75. wifi_state : get wifi_state
76. wifi_update_power : Power table test command
77. looprt : looprt based on bloop
78. looprt_status : looprt based on bloop
79. looprt_evt : looprt notify event
80. looprt_evt_status : looprt evt to dump
81. looprt_schedule1 : looprt schedule evt 20s
82. looprt_schedule2 : looprt schedule evt 10s
83. tcpc : create a tcpc for in a new task
84. tcps : create a tcp server for in a new task
85. ipc : iperf TCP client
86. ips : iperf TCP server
87. ipu : iperf UDP client
88. ipus : iperf UDP server
89. netstat : show current net states
90. ping : ping [-c count] [-i interval] [-W timeout] [-s size] [-h help] destination
91. -c count of ping requests. default is infinite
92. -i interval in ms. default is 1000
93. -W timeout in ms. default is 5000
94. -s ICMP payload size in bsntp_start : sntp start
95. sntp_time : sntp time
96. sntp_date : sntp date
97. blfdt : blfdt
98. blogset : blog pri set level
99. blogdump : blog info dump
100. ota_tcp : OTA from TCP server port 3333
101. ota_dump : dump partitions for ota related
102. lf_sys_time_now : sys time now
103. psm_set : psm set
104. psm_unset : psm unset
105. psm_get : psm get
106. psm_dump : psm dump
107. psm_erase : psm dump
108. psm_test : psm test
109. gpio-func : gpio-func pinnum 0/1[0:output, 1:input] 0/1[pullup] 0/1[pulldown]
110. gpio-set : gpio-set pinnum 0/1
111. gpio-get : gpio-get pinnum
112. wdt-init : wdt-init ms
113. wdt-feed : wdt-feed
114. wdt-disable : wdt-disable
115. timer-start : timer-start

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通过串口输入相关命令，连接WiFi
wifi_sta_connect TP-LINK_6BE8 177381309xx

1. ----- BUG FIXME? NOT do STA enable again
2. [WF] MM_ADD_IF_REQ Sending: STA
3. 歵d_start idx=0
4. [WF] MM_ADD_IF_REQ Done
5. [WF] vif_index from LAMC is 0
6. [WF][SM] Entering idle state
7. [WF][SM] Action Connect
8. ssid TP-LINK_6BE8
9. ssid len 12
10. psk 17738130986
11. psk len 11
12. pmk
13. pmk len 0
14. channel band 0
15. channel freq 0
16. mac 00:00:00:00:00:00
17. dhcp status: true
18. [WF][SM] State Action ###idle### --->>> ###connecting###
19. connecting using vif_idx 0
20. ===start sm_get_bss_params===
21. bssid[0] = 0xffff
22. bssid[1] = 0xffff
23. bssid[2] = 0xffff
24. search ssid = TP-LINK_6BE8
25. result ssid index = -1
26. ===end sm_get_bss_params===
27. [WF][SM] Entering connecting state
29. # [APP] [EVT] Connecting 880885
30. ===start sm_get_bss_params===
31. bssid[0] = 0xffff
32. bssid[1] = 0xffff
33. bssid[2] = 0xffff
34. search ssid = TP-LINK_6BE8
35. result ssid index = 0
36. ===end sm_get_bss_params===
37. wpa2/wpa3 pairwise ccmp:1,tkip:0,wep104:0,wep:40:0
38. wpa2/wpa3 group ccmp:1,tkip:0,wep104:0,wep:40:0
39. wpa2/wpa3 is_pmf_required:0
40. AP Security mode: wep:0,wpa:1,wpa2:1,wpa3:0
41. ------ 247 set default key 0x42018c08, key ptr 0x00000000
42. [APP] [EVT] SCAN On Join 884653
43. [ 890129][[32mINFO[0m: lf_adc.c: 260] offset = 2158
44. proc_hellow_entry: RISC-V rv32imafc
45. 4-way handshake timeout failure, wlan 802.11 reason code = 15, try to transmit deauth frame
46. ind ix 0x4202303c, chan_ctxt is 0x420183f4
47. connect failure, ssid = TP-LINK_6BE8, index = 0
48. from sm_connect_ind to scanu_rm_exist_ssid
49. [RX] Connection Status
50. [RX] status_code 8
51. [RX] connect result: Passwd error, 4-way handshake timeout
52. [RX] MAC 74:05:A5:C3:6B:E8
53. [RX] vif_idx 0
54. [RX] ap_idx 0
55. [RX] ch_idx 0
56. [RX] qos 1
57. [RX] acm 0
58. [RX] assoc_req_ie_len 89
59. [RX] assoc_rsp_ie_len 196
60. [RX] aid 0
61. [RX] band 0
62. [RX] center_freq 2462
63. [RX] width 0
64. [RX] center_freq1 2462
65. [RX] center_freq2 0
66. [WF][SM] Exiting connecting state
67. [WF][SM] State Action ###connecting### --->>> ###disconnect###
68. [WF][SM] Entering disconnect state
69. [WF][SM] Will retry in 2000 ticks
70. [APP] [EVT] disconnect 894737, Reason: Passwd error, 4-way handshake timeout
71. [WF][PF] Using profile, idx is @0
72. [WF][SM] Retry Again --->>> retry connect
73. [WF][SM] Exiting disconnect state
74. Delete Timer.
75. [WF][SM] State Action ###disconnect### --->>> ###connecting###
76. [WF][SM]Action Connect
77. ssid TP-LINK_6BE8
78. ssid len 12
79. psk 17738130986
80. psk len 11
81. pmk
82. pmk len 0
83. mac 00:00:00:00:00:00
84. connecting using vif_idx 0
85. ===start sm_get_bss_params===
86. bssid[0] = 0xffff
87. bssid[1] = 0xffff
88. bssid[2] = 0xffff
89. search ssid = TP-LINK_6BE8
90. result ssid index = -1
91. ===end sm_get_bss_params===
92. [WF][SM] Entering connecting state
93. [APP] [EVT] Reconnect 896740
94. [APP] [EVT] Connecting 896740
95. ===start sm_get_bss_params===
96. bssid[0] = 0xffff
97. bssid[1] = 0xffff
98. bssid[2] = 0xffff
99. search ssid = TP-LINK_6BE8
100. result ssid index = 0
101. ===end sm_get_bss_params===
102. wpa2/wpa3 pairwise ccmp:1,tkip:0,wep104:0,wep:40:0
103. wpa2/wpa3 group ccmp:1,tkip:0,wep104:0,wep:40:0
104. wpa2/wpa3 is_pmf_required:0
105. AP Security mode: wep:0,wpa:1,wpa2:1,wpa3:0
106. ------ 247 set default key 0x42018d40, key ptr 0x00000000
107. [APP] [EVT] SCAN On Join 900510
108. proc_hellow_entry: RISC-V rv32imafc
109. set key:sta_idx:1, inst_nbr:0, key_idx:0,cipher_suite:2,key_len:16
110. set key:sta_idx:255, inst_nbr:0, key_idx:1,cipher_suite:2,key_len:16
111. ind ix 0x42022e34, chan_ctxt is 0x42018410
112. [RX] Connection Status
113. [RX] status_code 0
114. [RX] connect result: sm connect ind ok
115. [RX] MAC 74:05:A5:C3:6B:E8
116. [RX] vif_idx 0
117. [RX] ap_idx 1
118. [RX] ch_idx 0
119. [RX] qos 1
120. [RX] acm 0
121. [RX] assoc_req_ie_len 89
122. [RX] assoc_rsp_ie_len 196
123. [RX] aid 0
124. [RX] band 0
125. [RX] center_freq 2462
126. [RX] width 0
127. [RX] center_freq1 2462
128. [RX] center_freq2 0
129. [WF][SM] Exiting connecting state
130. [WF][SM] State Action ###connecting### --->>> ###wifiConnected_ipObtaining###
131. [WF][SM] Entering wifiConnected_ipObtaining state
132. [WF][SM] DHCP Starting...0x42019e24
133. [APP] [EVT] connected 900828
134. -----------------> AABA Request:
135. A-MSDU: Not Permitted
136. Block Ack Policy: Immediate Block Ack
137. TID: 0
138. Number of Buffers: 64
139. -----------------> AABA Response:
140. A-MSDU: Not Permitted
141. Block Ack Policy: Immediate Block Ack
142. TID: 0
143. Number of Buffers: 8
144. [lwip] netif status callback
145. IP: 192.168.1.105
146. MK: 255.255.255.0
147. GW: 192.168.1.1
148. [WF][SM] Exiting wifiConnected_ipObtaining state
149. [WF][SM] IP GOT IP:192.168.1.105, MASK: 255.255.255.0, Gateway: 192.168.1.1, dns1: 172.16.16.16, dns2: 172.16.16.17
150. [WF][SM] State Action ###wifiConnected_ipObtaining### --->>> ###wifiConnected_IPOK###
151. [WF][SM] Entering wifiConnected_IPOK state
152. [APP] [EVT] GOT IP 903003
153. [SYS] Memory left is 133512 Bytes

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可以看到比较完整的WiFi连接信息，及其结果，IP地址详细信息
成功连接WiFi后，可以用ping命令测试是否联网成功

1. ping -c20 www.baidu.com
3. # 60 bytes from 182.61.200.7: icmp_seq=1 ttl=47 time=38 ms
4. 60 bytes from 182.61.200.7: icmp_seq=2 ttl=47 time=34 ms
5. proc_hellow_entry: RISC-V rv32imafc
6. 60 bytes from 182.61.200.7: icmp_seq=3 ttl=47 time=37 ms
7. 60 bytes from 182.61.200.7: icmp_seq=5 ttl=47 time=36 ms
8. 60 bytes from 182.61.200.7: icmp_seq=6 ttl=47 time=37 ms
9. 60 bytes from 182.61.200.7: icmp_seq=7 ttl=47 time=38 ms
10. 60 bytes from 182.61.200.7: icmp_seq=8 ttl=47 time=35 ms
11. The sequence number 4 timed out
12. 60 bytes from 182.61.200.7: icmp_seq=9 ttl=47 time=39 ms
13. 60 bytes from 182.61.200.7: icmp_seq=10 ttl=47 time=42 ms
14. 60 bytes from 182.61.200.7: icmp_seq=11 ttl=47 time=36 ms
15. 60 bytes from 182.61.200.7: icmp_seq=12 ttl=47 time=34 ms
16. proc_hellow_entry: RISC-V rv32imafc
17. 60 bytes from 182.61.200.7: icmp_seq=13 ttl=47 time=36 ms
18. 60 bytes from 182.61.200.7: icmp_seq=14 ttl=47 time=39 ms
19. 60 bytes from 182.61.200.7: icmp_seq=15 ttl=47 time=39 ms
20. 60 bytes from 182.61.200.7: icmp_seq=16 ttl=47 time=39 ms
21. 60 bytes from 182.61.200.7: icmp_seq=17 ttl=47 time=40 ms
22. 60 bytes from 182.61.200.7: icmp_seq=18 ttl=47 time=39 ms
23. 60 bytes from 182.61.200.7: icmp_seq=19 ttl=47 time=34 ms
24. 60 bytes from 182.61.200.7: icmp_seq=20 ttl=47 time=41 ms

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有个别丢包现象，应该是WiFi信号不够好
demo例程中提供了一个http下载的功能

1. static int client_demo(char *hostname)
2. {
3. int sockfd;
4. /* Get host address from the input name */
5. struct hostent *hostinfo = gethostbyname(hostname);
6. uint8_t *recv_buffer;
8. if (!hostinfo) {
9. printf("gethostbyname Failedrn");
10. return -1;
11. }
13. struct sockaddr_in dest;
15. char buffer[MAXBUF];
16. /* Create a socket */
17. /*---Open socket for streaming---*/
18. if ((sockfd = socket(AF_INET, SOCK_STREAM, 0)) < 0) {
19. printf("Error in socketrn");
20. return -1;
21. }
23. /*---Initialize server address/port struct---*/
24. memset(&dest, 0, sizeof(dest));
25. dest.sin_family = AF_INET;
26. dest.sin_port = htons(PORT);
27. dest.sin_addr = *((struct in_addr *) hostinfo->h_addr);
28. // char ip[16];
29. uint32_t address = dest.sin_addr.s_addr;
30. char *ip = inet_ntoa(address);
32. printf("Server ip Address : %srn", ip);
33. /*---Connect to server---*/
34. if (connect(sockfd,
35. (struct sockaddr *)&dest,
36. sizeof(dest)) != 0) {
37. printf("Error in connectrn");
38. return -1;
39. }
40. /*---Get "Hello?"---*/
41. memset(buffer, 0, MAXBUF);
42. char wbuf[]
43. = "GET /ddm/ContentResource/music/204.mp3 HTTP/1.1rnHost: nf.cr.dandanman.comrnUser-Agent: wmsdkrnAccept: */*rnrn";
44. write(sockfd, wbuf, sizeof(wbuf) - 1);
46. int ret = 0;
47. int total = 0;
48. int debug_counter = 0;
49. uint32_t ticks_start, ticks_end, time_consumed;
51. ticks_start = xTaskGetTickCount();
52. recv_buffer = pvPortMalloc(BUFFER_SIZE);
53. if (NULL == recv_buffer) {
54. goto out;
55. }
56. while (1) {
57. ret = read(sockfd, recv_buffer, BUFFER_SIZE);
58. if (ret == 0) {
59. printf("eofnr");
60. break;
61. } else if (ret < 0) {
62. printf("ret = %d, err = %dnr", ret, errno);
63. break;
64. } else {
65. total += ret;
66. /*use less debug*/
67. if (0 == ((debug_counter++) & 0xFF)) {
68. printf("total = %d, ret = %dnr", total, ret);
69. }
70. //vTaskDelay(2);
71. if (total > 82050000) {
72. ticks_end = xTaskGetTickCount();
73. time_consumed = ((uint32_t)(((int32_t)ticks_end) - ((int32_t)ticks_start))) / 1000;
74. printf("Download comlete, total time %u s, speed %u Kbpsrn",
75. (unsigned int)time_consumed,
76. (unsigned int)(total / time_consumed * 8 / 1000)
77. );
78. break;
79. }
80. }
81. }
83. vPortFree(recv_buffer);
84. out:
85. close(sockfd);
86. return 0;
87. }

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对应的命令是http，可以看到其下载的过程

1. http
2. Server ip Address : 60.255.154.100
3. total = 688, ret = 688
4. proc_hellow_entry: RISC-V rv32imafc
5. total = 234608, ret = 688
6. total = 468528, ret = 688
7. proc_hellow_entry: RISC-V rv32imafc
8. total = 695568, ret = 1376
9. total = 920544, ret = 688
10. proc_hellow_entry: RISC-V rv32imafc
11. total = 1157216, ret = 688
12. total = 1490896, ret = 1376
13. proc_hellow_entry: RISC-V rv32imafc
14. total = 1885808, ret = 2064
15. proc_hellow_entry: RISC-V rv32imafc
16. proc_hellow_entry: RISC-V rv32imafc
17. proc_hellow_entry: RISC-V rv32imafc
18. proc_hellow_entry: RISC-V rv32imafc
19. eof

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total的值，应该就是下载的字节数值。
三、心得体会
BF2的开发板提供了很多的demo，还是比较丰富的，只是其代码风格和公司的规定，可能有些特殊，感觉使用起来束缚感比较重，代码方面也感觉不够简单易用，想开发符合自己要求的应用，感觉难度不小，相对其他厂家的同类产品，如ESP32等，易用性以及性价比方面感觉存在不小的差距。最后，还是感觉跃昉科技和发烧友提供的评测机会！