/
exch_main.c
132 lines (103 loc) · 3.08 KB
/
exch_main.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
#include "define.h"
Int8U hex2char(Int16U pointer)
{
Int8U a, b;
a= UartBuffer[pointer++] - 48;
if(a > 9) a-= 7;
b= UartBuffer[pointer] - 48;
if(b > 9) b-= 7;
return((a << 4) | b);
}
Int16U hex2int(Int16U pointer)
{
return((hex2char(pointer)<<8) | hex2char(pointer+2));
}
Int16U char2hex(Int8U cnum)
{
Int8U a,b;
a= (cnum & 0x0f);
b= cnum>>4;
if(a > 9) a+= 55;
else a+= 48;
if(b > 9) b+= 55;
else b+= 48;
return(a | (b<<8));
}
// check sum
Int8U check_sum(Int16U len)
{
Int8U crc=0;
Int16U i;
for(i= 0; i < len; i++) crc+= UartBuffer[i];
return crc;
}
void hexbuffer_2_binbuffer(pInt8U hexBuffer, pInt8U binBuffer, Int16U nBytes, Int16U Pointer)
{
Int16U i;
for(i= 0; i < nBytes; i++, Pointer+= 2) binBuffer[i]= hex2char(Pointer);
}
void binbuffer_2_hexbuffer(pInt8U hexBuffer,Int8U __data20* binBuffer,Int16U nBytes,Int16U Pointer)
{
Int16U i, codedbyte;
for(i= 0; i < nBytes; i++)
{
codedbyte= char2hex(binBuffer[i]);
hexBuffer[Pointer++]= codedbyte >> 8;
hexBuffer[Pointer++]= codedbyte;
}
}
void uart_process(void)
{
Int8U num;
Int16U adr, d, c, command;
Flags.uart_recieve= 0;
// UART mode
if( (hex2int(1) != NetAdr) && (hex2int(1) != SERVICE_ADR) ) { RxCounter=0; RXI_ENABLE; return; }
if(check_sum(RxCounter-2) != hex2char(RxCounter-2)) { RxCounter=0; RXI_ENABLE; return; }
RxCounter= 0;
adr= hex2int(7);
num= hex2char(11);
command= UartBuffer[5]*256 + UartBuffer[6];
UartBuffer[0]= '!';
c= 7;
switch(command)
{
case 'WR': if((num > MAX_DATA_LEN) || ((adr + num) > RAMSIZE) ) goto fail;
hexbuffer_2_binbuffer(UartBuffer, (pInt8U)(RamBeginAddr + adr), num, 13);
goto final;
case 'RI': if(num > MAX_DATA_LEN) goto fail;
binbuffer_2_hexbuffer(UartBuffer,(Int8U __data20 *)(adr), num, 7);
c= 7 + num*2;
goto final;
case 'RR': if(num > MAX_DATA_LEN) goto fail;
binbuffer_2_hexbuffer(UartBuffer,(Int8U __data20 *)(RamBeginAddr + adr), num, 7);
c= 7 + num*2;
goto final;
case 'IR': for(; SerialNumberStr[c-7]; )
{
UartBuffer[c]= SerialNumberStr[c-7];
c++;
}
UartBuffer[c++]=' ';
for(; Version[c-16]; )
{
UartBuffer[c]= Version[c-16];
c++;
}
UartBuffer[c++]=' ';
for(; RxBuffer[c-28]; )
{
UartBuffer[c]= RxBuffer[c-21];
c++;
}
goto final;
fail:
default: UartBuffer[0]= '?';
final:
d= char2hex(check_sum(c));
UartBuffer[c]= d>>8;
UartBuffer[c+1]= d;
UartBuffer[c+2]= 0x0d;
}
TX_START;
}