如何实现SYN6288动态播报

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我想做一个能播报变量的测距设备，在变量的播报部分遇到障碍，希望有能力的老师帮忙看下。

这是一段在论坛上淘到的代码，看上去只能输入字符串

1. #include <string.h>
   
2. 
   
3. 
   
4. unsigned char unicstr[100]; //输出unicode编码字符串
   
5. int utf8_to_unicode(unsigned char *pUTF8, unsigned char *pUNIC);
   
6. unsigned int length;
   
7. unsigned char headOfFrame[5];     //定义数据帧头
   
8. unsigned char ecc = 0 ; //定义校验字节
   
9. unsigned int i = 0;
   
10. 
    
11. void setup()
    
12. {
    
13. // initialize serial:
    
14. Serial.begin(9600);
    
15. 
    
16. }
    
17. void loop()
    
18. {
    
19. 
    
20. unsigned char utf8str[]="123";//我想把这里的“123”替换成测距得出的变量，请问怎么改可以实现？
    
21. 
    
22.   length = utf8_to_unicode(utf8str, unicstr); //utf8 编码转换成unicode 编码，并返回unicode字符数
    
23.     headOfFrame[0] = 0xFD ; //构造帧头FD
    
24.     headOfFrame[1] = length >> 8 ;   //构造数据区长度的高字节
    
25.     headOfFrame[2] = (length + 3) & 0xFF; //构造数据区长度的低字节
    
26. headOfFrame[3] = 0x01; //构造命令字：合成播放命令
    
27. headOfFrame[4] = 0x03 ; //构造命令参数：编码格式为Unicode
    
28. ecc = 0;
    
29.     for(i = 0; i < 5; i++) //依次发送构造好的5 个帧头字节
    
30. {
    
31. ecc = ecc ^ (headOfFrame[i]); //对发送的字节进行异或校验
    
32. Serial.write(headOfFrame[i]);
    
33. }
    
34.     for(i = 0; i < length; i++) //依次发送待合成的文本数据
    
35. {
    
36. ecc = ecc ^ (unicstr[i]); //对发送的字节进行异或校验
    
37. Serial.write(unicstr[i]);
    
38. //Serial.println(unicstr[i], HEX);
    
39. }
    
40. Serial.write(ecc); //最后发送校验字节
    
41. delay(6000);
    
42. }
    
43. int utf8_to_unicode(unsigned char   *pUTF8, unsigned char *pUNIC)
    
44. {
    
45. //SYN6288中unicode编码采用大端模式
    
46. // b1 表示UTF-8编码的pInput中的高字节, b2  表示次高字节, ...
    
47.     unsigned char b1, b2, b3, b4;
    
48. int utfbytes = 0;
    
49. while( *pUTF8 != '\0')
    
50. {
    
51. b1 = *pUTF8;
    
52. if( (b1 & 0x80) == 0x0)  // utf8 - one byte
    
53. {
    
54. utfbytes = utfbytes + 2;
    
55. *pUNIC = 0x00;
    
56. *(pUNIC + 1) = b1;
    
57. pUTF8++;
    
58. pUNIC = pUNIC + 2;
    
59. }
    
60.         else if( (b1 & 0xE0) == 0xC0)  // utf8 - two byte
    
61. {
    
62. utfbytes = utfbytes + 2;
    
63. b1 = *pUTF8;
    
64. b2 = *(pUTF8 + 1);
    
65. if ( (b2 & 0xC0) != 0x80 )
    
66. return 0;
    
67. *pUNIC = (b1 >> 2) & 0x07;
    
68.             *(pUNIC + 1) = (b1 << 6) + (b2 & 0x3F);
    
69. pUTF8 = pUTF8 + 2;
    
70. pUNIC = pUNIC + 2;
    
71. }
    
72.         else if( (b1 & 0xF0) == 0xE0)  // utf8 - three byte
    
73. {
    
74. utfbytes = utfbytes + 2;
    
75. b1 = *pUTF8;
    
76. b2 = *(pUTF8 + 1);
    
77. b3 = *(pUTF8 + 2);
    
78. if ( ((b2 & 0xC0) != 0x80) || ((b3 & 0xC0) != 0x80) )
    
79. return 0;
    
80. *pUNIC = (b1 << 4) + ((b2 >> 2) & 0x0F);
    
81.             *(pUNIC + 1) = (b2 << 6) + (b3 & 0x3F);
    
82. pUTF8 = pUTF8 + 3;
    
83. pUNIC = pUNIC + 2;
    
84. }
    
85. else if( (b1 & 0xF8) == 0xF0)  // utf8 - four byte
    
86. {
    
87. utfbytes = utfbytes + 3;
    
88. b1 = *pUTF8;
    
89. b2 = *(pUTF8 + 1);
    
90. b3 = *(pUTF8 + 2);
    
91. b4 = *(pUTF8 + 3);
    
92.             if ( ((b2 & 0xC0) != 0x80) ||((b3 & 0xC0) != 0x80) || ((b4 & 0xC0) != 0x80) )
    
93. return 0;
    
94. *pUNIC = ((b1 << 2) & 0x1C) + ((b2 >> 4) & 0x03);
    
95. *(pUNIC + 1) = (b2 << 4) + ((b3 >> 2) & 0x0F);
    
96.             *(pUNIC + 2) = (b3 << 6) + (b4 & 0x3F);
    
97. pUTF8 = pUTF8 + 4;
    
98. pUNIC = pUNIC + 3;
    
99. }
    
100. }
     
101. *pUNIC = '\0';
     
102. return utfbytes;
     
103. }

复制代码

小生，谢谢了