Yihui Xiong
to colorize a colorful pixel with a simple touch using nfc technology
Dependencies: Chainable_RGB_LED mbed
use Arch, NFC Shield and Grove - Chainable RGB LED to DIY a touch pixel. Then use an Android with NFC support to colorize it.
The project is on https://github.com/Seeed-Studio/TouchPixel
Diff: nfc/PN532Interface.h
- Revision:
- 0:88960f3eeb2c
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/nfc/PN532Interface.h Fri Dec 27 01:46:32 2013 +0000
@@ -0,0 +1,56 @@
+
+
+#ifndef __PN532_INTERFACE_H__
+#define __PN532_INTERFACE_H__
+
+#include <stdint.h>
+
+#define PN532_PREAMBLE (0x00)
+#define PN532_STARTCODE1 (0x00)
+#define PN532_STARTCODE2 (0xFF)
+#define PN532_POSTAMBLE (0x00)
+
+#define PN532_HOSTTOPN532 (0xD4)
+#define PN532_PN532TOHOST (0xD5)
+
+#define PN532_ACK_WAIT_TIME (10) // ms, timeout of waiting for ACK
+
+#define PN532_INVALID_ACK (-1)
+#define PN532_TIMEOUT (-2)
+#define PN532_INVALID_FRAME (-3)
+#define PN532_NO_SPACE (-4)
+
+#define REVERSE_BITS_ORDER(b) b = (b & 0xF0) >> 4 | (b & 0x0F) << 4; \
+ b = (b & 0xCC) >> 2 | (b & 0x33) << 2; \
+ b = (b & 0xAA) >> 1 | (b & 0x55) << 1
+
+class PN532Interface
+{
+public:
+ virtual void begin() = 0;
+ virtual void wakeup() = 0;
+
+ /**
+ * @brief write a command and check ack
+ * @param header packet header
+ * @param hlen length of header
+ * @param body packet body
+ * @param blen length of body
+ * @return 0 success
+ * not 0 failed
+ */
+ virtual int8_t writeCommand(const uint8_t *header, uint8_t hlen, const uint8_t *body = 0, uint8_t blen = 0) = 0;
+
+ /**
+ * @brief read the response of a command, strip prefix and suffix
+ * @param buf to contain the response data
+ * @param len lenght to read
+ * @param timeout max time to wait, 0 means no timeout
+ * @return >=0 length of response without prefix and suffix
+ * <0 failed to read response
+ */
+ virtual int16_t readResponse(uint8_t buf[], uint8_t len, uint16_t timeout = 1000) = 0;
+};
+
+#endif
+