有人可以幫助我理解這一點嗎？

Question

您好，我在閱讀手冊指南后嘗試獲取結果，但沒有關於 uchar、*ucbuf 的描述

有人可以幫我嗎消息校准示例

void Crc16_Ccitt(uchar *ucbuf, uchar iLen, uchar *resut_arry)
{
unsigned int crc = 0xFFFF; // initial value
unsigned int polynomial = 0x1021; // 0001 0000 0010 0001 (0, 5, 12)
for (int j = 0; j < iLen; ++j) {
for (int i = 0; i < 8; i++) {
char bit = ((ucbuf[j] >> (7-i) & 1) == 1);
char c15 = ((crc >> 15 & 1) == 1);
crc <<= 1;
if (c15 ^ bit) crc ^= polynomial;
}
}

Answer 1

uchar is unsigned char.
ucbuf is the message buffer.
iLen is the number of unsigned characters in the buffer
I'm guessing, that resut_arry is short for result_array.

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顯示縮進代碼可能有幫助：

void Crc16_Ccitt(uchar *ucbuf, uchar iLen, uchar *resut_arry)
{
unsigned int crc = 0xFFFF; // initial value
unsigned int polynomial = 0x1021; // 0001 0000 0010 0001 (0, 5, 12)
    for (int j = 0; j < iLen; ++j) {
        for (int i = 0; i < 8; i++) {
            char bit = ((ucbuf[j] >> (7-i) & 1) == 1);
        char c15 = ((crc >> 15 & 1) == 1);
        crc <<= 1;
        if (c15 ^ bit) crc ^= polynomial;
    }
    /* missing code, that stores crc into resut_arry */
}