mfrc522程序注释(4)

{ status = MI_ERR; }

if (status == MI_OK) {

ucComMF522Buf[0] = 0; ucComMF522Buf[1] = 0; ucComMF522Buf[2] = 0; ucComMF522Buf[3] = 0;

CalulateCRC(ucComMF522Buf,4,&ucComMF522Buf[4]);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,6,ucComMF522Buf,&unLen); if (status != MI_ERR) { status = MI_OK; } }

if (status != MI_OK) { return MI_ERR; }

ucComMF522Buf[0] = PICC_TRANSFER; // 保存缓冲区内容命令 ucComMF522Buf[1] = goaladdr; // 目标地址

CalulateCRC(ucComMF522Buf,2,&ucComMF522Buf[2]);

status = PcdComMF522(PCD_TRANSCEIVE,ucComMF522Buf,4,ucComMF522Buf,&unLen); // 发送命令：将缓冲区的内容发送到目标地址

if ((status != MI_OK) || (unLen != 4) || ((ucComMF522Buf[0] & 0x0F) != 0x0A)) { status = MI_ERR; }

return status; } /*

/////////////////////////////////////////////////////////////////////// // Delay 10ms

/////////////////////////////////////////////////////////////////////// void delay_10ms(unsigned int _10ms) {

#ifndef NO_TIMER2

RCAP2LH = RCAP2_10ms; T2LH = RCAP2_10ms;

TR2 = TRUE;

while (_10ms--) {

while (!TF2); TF2 = FALSE; }

TR2 = FALSE; #else

while (_10ms--) {

delay_50us(19); if (CmdValid) return; delay_50us(20); if (CmdValid) return; delay_50us(20); if (CmdValid) return; delay_50us(20); if (CmdValid) return; delay_50us(20); if (CmdValid ) return; delay_50us(20); if (CmdValid) return; delay_50us(20); if (CmdValid) return; delay_50us(20); if (CmdValid) return; delay_50us(20); if (CmdValid) return; delay_50us(19); if (CmdValid) return; } #endif } */