请教一下论坛各位大神，我在制作一个数控电源时由于更改了大功率NPN三极管后发现设定电压与输出电压不一致，请问以下程序要怎么修改才能减少输出电压与设定电压的差距，谢谢！
另请问一下if (voltage1 > 247) //是否补尝 这句中voltage1 > 247指的是什么意思？
以下是原程序：
#include<REGX52.H>
#include"MACRO_AND_CONST.h"
#include"ADJ_KEY.h"
#include"CONFIG.H"
bit b_vol_flag = 0; //电压是否加补尝标记
bit b_cur_flag = 0; //电流是否加补尝标记
volatile uchar voltage = 0; //定义两个unsigned char 速度比 定义一个unsigned int 类型要快
volatile uchar voltage1 = 0;
volatile uchar current1 = 0; //定义两个unsigned char 速度比 定义一个unsigned int 类型要快
volatile uchar current = 0;
uint uiset_voltage = VOLTAGE; //设置开机电压 U = uiset_voltage * 0.005
uint uiset_current = CURRENT; //设置开机电压 A = uiset_current * 0.005
/*********************************************
函数名：code pwm[] = {}
函数功能：给定时器赋值
参数：无
返回：无
备注：数组常量
/**********************************************/
uchar code pwm[]=
{
0 , //0
1 , //1
2 , //2
3 , //3
4 , //4
5 , //5
6 , //6
7 , //7
8 , //8
9 , //9
10 , //10
11 , //11
12 , //12
13 , //13
14 , //14
15 , //15
16 , //16
17 , //17
18 , //18
19 , //19
20 , //20
21 , //21
22 , //22
23 , //23
24 , //24
25 , //25
26 , //26
27 , //27
28 , //28
29 , //29
30 , //30
31 , //31
32 , //32
33 , //33
34 , //34
35 , //35
36 , //36
37 , //37
38 , //38
39 , //39
40 , //40
41 , //41
42 , //42
43 , //43
44 , //44
45 , //45
46 , //46
47 , //47
48 , //48
49 , //49
50 , //50
51 , //51
52 , //52
53 , //53
54 , //54
55 , //55
56 , //56
57 , //57
58 , //58
59 , //59
60 , //60
61 , //61
62 , //62
63 , //63
64 , //64
65 , //65
66 , //66
67 , //67
68 , //68
69 , //69
70 , //70
71 , //71
72 , //72
73 , //73
74 , //74
75 , //75
76 , //76
77 , //77
78 , //78
79 , //79
80 , //80
81 , //81
82 , //82
83 , //83
84 , //84
85 , //85
86 , //86
87 , //87
88 , //88
89 , //89
90 , //90
91 , //91
92 , //92
93 , //93
94 , //94
95 , //95
96 , //96
97 , //97
98 , //98
99 , //99
100 , //100
101 , //101
102 , //102
103 , //103
104 , //104
105 , //105
106 , //106
107 , //107
108 , //108
109 , //109
110 , //110
111 , //111
112 , //112
113 , //113
114 , //114
115 , //115
116 , //116
117 , //117
118 , //118
119 , //119
120 , //120
121 , //121
122 , //122
123 , //123
124 , //124
125 , //125
126 , //126
127 , //127
128 , //128
129 , //129
130 , //130
131 , //131
132 , //132
133 , //133
134 , //134
135 , //135
136 , //136
137 , //137
138 , //138
139 , //139
140 , //140
141 , //141
142 , //142
143 , //143
144 , //144
145 , //145
146 , //146
147 , //147
148 , //148
149 , //149
150 , //150
151 , //151
152 , //152
153 , //153
154 , //154
155 , //155
156 , //156
157 , //157
158 , //158
159 , //159
160 , //160
161 , //161
162 , //162
163 , //163
164 , //164
165 , //165
166 , //166
167 , //167
168 , //168
169 , //169
170 , //170
171 , //171
172 , //172
173 , //173
174 , //174
175 , //175
176 , //176
177 , //177
178 , //178
179 , //179
180 , //180
181 , //181
182 , //182
183 , //183
184 , //184
185 , //185
186 , //186
187 , //187
188 , //188
189 , //189
190 , //190
191 , //191
192 , //192
193 , //193
194 , //194
195 , //195
196 , //196
197 , //197
198 , //198
199 , //199
200 , //200
201 , //201
202 , //202
203 , //203
204 , //204
205 , //205
206 , //206
207 , //207
208 , //208
209 , //209
210 , //210
211 , //211
212 , //212
213 , //213
214 , //214
215 , //215
216 , //216
217 , //217
218 , //218
219 , //219
220 , //220
221 , //221
222 , //222
223 , //223
224 , //224
225 , //225
226 , //226
227 , //227
228 , //228
229 , //229
230 , //230
231 , //231
232 , //232
233 , //233
234 , //234
235 , //235
236 , //236
237 , //237
238 , //238
239 , //239
240 , //240
241 , //241
242 , //242
243 , //243
244 , //244
245 , //245
246 , //246
247 , //247
248 , //248
249 , //249
250 , //250
251 , //251
252 , //252
253 , //253
254 , //254
255 //255
};
/*********************************************
函数名：voltage_current()
函数功能：加载PWM占空比(加载电压电流)
参数：无
返回：无
备注：无
/**********************************************/
void voltage_current()
{
if (!b_vol_flag)
{
TH1 = pwm[voltage];
TL1 = pwm[voltage1] + TL1;
}
else
{
TH1 = pwm[voltage];
TL1 = pwm[voltage1];
}
if (!b_cur_flag)
{
TH2 = pwm[current];
TL2 = pwm[current1] + TL2;
}
else
{
TH2 = pwm[current];
TL2 = pwm[current1];
}
}
/*********************************************
函数名：set_vol_cur(void)
函数功能：设置PWM占空比(设置电压电流)
参数：无
返回：无
备注：无
/**********************************************/
void set_vol_cur(void)
{
voltage = (TIME_NUMBER + (uiset_voltage * STEP)) >> 0x08;
voltage1 = (TIME_NUMBER + (uiset_voltage * STEP) VOLTAGE_COMPENSATION ) & 0xFF;
current = (TIME_NUMBER + (uiset_current * STEP)) >> 0x08;
current1 = (TIME_NUMBER + (uiset_current * STEP) CURRENT_COMPENSATION ) & 0xFF;
if (voltage1 > 247) //是否补尝
{
b_vol_flag = 1;
}
else
{
b_vol_flag = 0;
}
if (current1 > 247) //是否补尝
{
b_cur_flag = 1;
}
else
{
b_cur_flag = 0;
}
}
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