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57 lines
1.8 KiB
C++
57 lines
1.8 KiB
C++
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#ifndef __PN532_INTERFACE_H__
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#define __PN532_INTERFACE_H__
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#include <stdint.h>
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#define PN532_PREAMBLE (0x00)
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#define PN532_STARTCODE1 (0x00)
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#define PN532_STARTCODE2 (0xFF)
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#define PN532_POSTAMBLE (0x00)
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#define PN532_HOSTTOPN532 (0xD4)
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#define PN532_PN532TOHOST (0xD5)
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#define PN532_ACK_WAIT_TIME (10) // ms, timeout of waiting for ACK
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#define PN532_INVALID_ACK (-1)
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#define PN532_TIMEOUT (-2)
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#define PN532_INVALID_FRAME (-3)
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#define PN532_NO_SPACE (-4)
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#define REVERSE_BITS_ORDER(b) b = (b & 0xF0) >> 4 | (b & 0x0F) << 4; \
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b = (b & 0xCC) >> 2 | (b & 0x33) << 2; \
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b = (b & 0xAA) >> 1 | (b & 0x55) << 1
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class PN532Interface
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{
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public:
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virtual void begin() = 0;
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virtual void wakeup() = 0;
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/**
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* @brief write a command and check ack
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* @param header packet header
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* @param hlen length of header
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* @param body packet body
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* @param blen length of body
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* @return 0 success
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* not 0 failed
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*/
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virtual int8_t writeCommand(const uint8_t *header, uint8_t hlen, const uint8_t *body = 0, uint8_t blen = 0) = 0;
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/**
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* @brief read the response of a command, strip prefix and suffix
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* @param buf to contain the response data
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* @param len lenght to read
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* @param timeout max time to wait, 0 means no timeout
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* @return >=0 length of response without prefix and suffix
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* <0 failed to read response
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*/
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virtual int16_t readResponse(uint8_t buf[], uint8_t len, uint16_t timeout = 1000) = 0;
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};
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#endif
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