Seeed / PN532

PN532 NFC library for Seeed Studio's NFC Shield

Fork of PN532 by Yihui Xiong

PN532Interface.h@0:9c6b9280c0e1, 2013-10-08 (annotated)

Committer:
yihui
Date:
Tue Oct 08 08:33:22 2013 +0000
Revision:
0:9c6b9280c0e1
Child:
1:b8cab5222fd0
initial, ported from https://github.com/Seeed-Studio/PN532

Who changed what in which revision?

UserRevisionLine numberNew contents of line
yihui 0:9c6b9280c0e1 1
yihui 0:9c6b9280c0e1 2
yihui 0:9c6b9280c0e1 3 #ifndef __PN532_INTERFACE_H__
yihui 0:9c6b9280c0e1 4 #define __PN532_INTERFACE_H__
yihui 0:9c6b9280c0e1 5
yihui 0:9c6b9280c0e1 6 #define PN532_PREAMBLE (0x00)
yihui 0:9c6b9280c0e1 7 #define PN532_STARTCODE1 (0x00)
yihui 0:9c6b9280c0e1 8 #define PN532_STARTCODE2 (0xFF)
yihui 0:9c6b9280c0e1 9 #define PN532_POSTAMBLE (0x00)
yihui 0:9c6b9280c0e1 10
yihui 0:9c6b9280c0e1 11 #define PN532_HOSTTOPN532 (0xD4)
yihui 0:9c6b9280c0e1 12 #define PN532_PN532TOHOST (0xD5)
yihui 0:9c6b9280c0e1 13
yihui 0:9c6b9280c0e1 14 #define PN532_ACK_WAIT_TIME (10) // ms, timeout of waiting for ACK
yihui 0:9c6b9280c0e1 15
yihui 0:9c6b9280c0e1 16 #define PN532_INVALID_ACK (-1)
yihui 0:9c6b9280c0e1 17 #define PN532_TIMEOUT (-2)
yihui 0:9c6b9280c0e1 18 #define PN532_INVALID_FRAME (-3)
yihui 0:9c6b9280c0e1 19 #define PN532_NO_SPACE (-4)
yihui 0:9c6b9280c0e1 20
yihui 0:9c6b9280c0e1 21 #define REVERSE_BITS_ORDER(b) b = (b & 0xF0) >> 4 | (b & 0x0F) << 4; \
yihui 0:9c6b9280c0e1 22 b = (b & 0xCC) >> 2 | (b & 0x33) << 2; \
yihui 0:9c6b9280c0e1 23 b = (b & 0xAA) >> 1 | (b & 0x55) << 1
yihui 0:9c6b9280c0e1 24
yihui 0:9c6b9280c0e1 25 class PN532Interface {
yihui 0:9c6b9280c0e1 26 public:
yihui 0:9c6b9280c0e1 27 virtual void begin() = 0;
yihui 0:9c6b9280c0e1 28 virtual void wakeup() = 0;
yihui 0:9c6b9280c0e1 29
yihui 0:9c6b9280c0e1 30 /**
yihui 0:9c6b9280c0e1 31 * @brief write a command and check ack
yihui 0:9c6b9280c0e1 32 * @param buf command to write, not contain prefix and suffix
yihui 0:9c6b9280c0e1 33 * @param len lenght of command
yihui 0:9c6b9280c0e1 34 * @return 0 success
yihui 0:9c6b9280c0e1 35 * not 0 failed
yihui 0:9c6b9280c0e1 36 */
yihui 0:9c6b9280c0e1 37 virtual int8_t writeCommand(const uint8_t buf[], uint8_t len) = 0;
yihui 0:9c6b9280c0e1 38
yihui 0:9c6b9280c0e1 39 /**
yihui 0:9c6b9280c0e1 40 * @brief read the response of a command, strip prefix and suffix
yihui 0:9c6b9280c0e1 41 * @param buf to contain the response data
yihui 0:9c6b9280c0e1 42 * @param len lenght to read
yihui 0:9c6b9280c0e1 43 * @param timeout max time to wait, 0 means no timeout
yihui 0:9c6b9280c0e1 44 * @return >=0 length of response without prefix and suffix
yihui 0:9c6b9280c0e1 45 * <0 failed to read response
yihui 0:9c6b9280c0e1 46 */
yihui 0:9c6b9280c0e1 47 virtual int16_t readResponse(uint8_t buf[], uint8_t len, uint16_t timeout = 1000) = 0;
yihui 0:9c6b9280c0e1 48 };
yihui 0:9c6b9280c0e1 49
yihui 0:9c6b9280c0e1 50 #endif
yihui 0:9c6b9280c0e1 51