[英]C++ Eclipse console encoding plain text as other characters
我有一個英特爾愛迪生運行從一個串口讀取GPS的一些數據的C ++程序和呼應回控制台。
這部分工作正常,但是當琴弦在控制台讀取他們的字符不應該在那里,像“¬é”。 我猜的東西是搞砸了與Eclipse控制台/ G ++編碼,並認為一些讀數是字符代碼。
以下是Eclipse控制台的一些輸出:
$GPVTG,,T,,M,0.041,N,0.075,K,A*24
$GPGGA,225153.00,5206.75433,N,12206.88881,W,1,10,1.03,582.1,M,-15.6,M,,*6F
$GPGSA,A,3,32,02,12,14,24,06,03,19,17,25,,,1.84,1.03,1.53*05
$GPGSV,3,1,11,ŽN
-> 02,51,176,30,03,10,027,17,06,60,088,33,12,68,295,36*79
$GPGSV,3,2,11,14,10,316,30,17,20,072,27,19,45,069,40,24,36,215,35*7E
$GPGSV,3,3,11,25,29,301,28,29,05,254,,32,07,305,33*40
$GPGLL,5206.75433,N,12206.88881,W,225153.00,A,A*78
.53*05
$GPGSV,3,1,11,ŽN
這里是一些輸出的直接從愛迪生(串口讀取cat /dev/ttyMFD1
):
$GPVTG,,T,,M,0.048,N,0.090,K,A*26
$GPGGA,225407.00,5206.75339,N,12206.88816,W,1,10,1.02,584.2,M,-15.6,M,,*6C
$GPGSA,A,3,32,02,12,14,24,06,03,19,17,25,,,1.80,1.02,1.49*0B
$GPGSV,3,1,11,02,52,176,15,03,10,026,20,06,59,086,29,12,69,295,41*76
$GPGSV,3,2,11,14,09,316,29,17,19,072,29,19,44,070,34,24,35,215,32*74
$GPGSV,3,3,11,25,30,301,29,29,06,254,,32,06,304,17*4C
$GPGLL,5206.75339,N,12206.88816,W,225407.00,A,A*7F
$GPRMC,225408.00,A,5206.75337,N,12206.88814,W,0.058,,170616,,,A*6F
我嘗試了運行配置“公共”選項卡中所有可用的編碼選項,但它們都產生了奇怪的結果,甚至是漢字!
相關代碼是char array[255];
初始化緩沖區,然后將串行數據讀入緩沖區並將其輸出到控制台:
while(true){
dev->read(array,255);
std::cout<<"-> "<<array<<std::endl;
}
鑒於此塊:
-> 02,51,176,30,03,10,027,17,06,60,088,33,12,68,295,36*79
$GPGSV,3,2,11,14,10,316,30,17,20,072,27,19,45,069,40,24,36,215,35*7E
$GPGSV,3,3,11,25,29,301,28,29,05,254,,32,07,305,33*40
$GPGLL,5206.75433,N,12206.88881,W,225153.00,A,A*78
.53*05
$GPGSV,3,1,11,ŽN
添加rn代表CRLF的兩個字符,該字符終止一行NMEA數據,然后僅計算我得到的垃圾之間的字符數
0123456789ABCDEF
0 02,51,176,30,03,
1 10,027,17,06,60,
2 088,33,12,68,295
3 ,36*79rn$GPGSV,3
4 ,2,11,14,10,316,
5 30,17,20,072,27,
6 19,45,069,40,24,
7 36,215,35*7Ern$G
8 PGSV,3,3,11,25,2
9 9,301,28,29,05,2
A 54,,32,07,305,33
B *40rn$GPGLL,5206
C .75433,N,12206.8
D 8881,W,225153.00
E ,A,A*78rn.53*05r
F n$GPGSV,3,1,11,
255個字符
正是其中之一:
dev->read(array,255);
廉價的黑客是為了
char array[256];
接着
dev->read(array,sizeof(array)-1);
array[sizeof(array)-1] = '\0';
但我認為您最好使用以下方法:
int len = receiveUntil(array,sizeof(array), "\r\n")
if (len >= 0)
{
// checksum and parse
}
discardUntil ("$");
哪里
receiveUntil
將進入的流讀入array
直到找到NMEA句子的末尾,然后null終止array
並返回讀取的字節數或array
即將溢出,在這種情況下,它返回-1。
discardUntil
丟棄所有內容,直到找到NMEA起始字符“ $”
帶有將在找到$
時重置array
的函數來替換receiveUntil
獎勵點,因此您不會錯過任何尚未損壞的消息。
事實證明,這與編碼無關。 當我嘗試使用NodeJS進行相同的操作並返回相同的輸出時,我開始意識到這是另一回事。
我忘記了從此GPS模塊讀取輸出的正確方法是一次讀取一個字符,直到您擊中行尾的換行符為止, 然后使用它/將其記錄到控制台。
所以我的代碼變成了:
char array[255];
char c[1];
int i = 0;
while(true){
dev->read(c,1);
if(c[0] == '\n'){
i = 0;
std::cout<<"-> "<<array<<std::endl;
char *begin = array;
char *end = begin + sizeof(array);
std::fill(begin, end, 0);
}else{
array[i] = c[0];
++i;
}
}
現在可以完美工作了:)
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