Diff: PN532/MuNFCMbedPlatform.cpp

Revision:

11:5be631376e5b

Child:

13:6f98851e025b

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/PN532/MuNFCMbedPlatform.cpp	Wed Nov 07 18:19:09 2012 +0000
@@ -0,0 +1,337 @@
+/*
+ MuNFCMbedPlatform.cpp
+ Copyright (c) Donatien Garnier 2012
+ donatien.garnier@appnearme.com
+ http://www.appnearme.com/
+ */
+
+#include "mbed.h"
+
+#include "MuNFCConfig.h"
+#include "munfc/nfc_config.h"
+
+#if MUNFC_RTOS
+#include "rtos/rtos.h"
+#endif
+
+InterruptIn* nfc_irq_pin_isr;
+DigitalOut* nfc_cs_pin;
+SPI* nfc_spi;
+
+extern "C"
+{
+#if NFC_CONTROLLER == PN512
+#include "munfc/platform/pn512_platform.h"
+#elif NFC_CONTROLLER == PN532
+#include "munfc/platform/pn532_platform.h"
+#endif
+#include "munfc/platform/rtos.h"
+
+#if NFC_CONTROLLER == PN512
+void pn512_io_init()
+{
+  nfc_irq_pin_isr->rise(pn512_irq);
+  *nfc_cs_pin = 1;
+}
+
+/*
+ * Get the IRQ pin's state
+ */
+bool pn512_irq_pin_get()
+{
+  //return (nfc_irq_pin_int->read() ? true : false);
+  return (nfc_irq_pin_isr->read() ? true : false);
+}
+
+/*
+ * Set the CS pin to 0 (active low)
+ */
+void pn512_cs_set()
+{
+  *nfc_cs_pin = 0;
+}
+
+/*
+ * Set the CS pin to 1 (active high)
+ */
+void pn512_cs_clear()
+{
+  *nfc_cs_pin = 1;
+}
+
+/*
+ * You MUST call pn512_irq() on each raising front of IRQ pin
+ */
+#endif
+
+#if NFC_CONTROLLER == PN532
+/*
+ * Init
+ */
+void pn532_io_init(void)
+{
+  nfc_irq_pin_isr->mode(PullUp);
+  nfc_irq_pin_isr->fall(pn532_irq);
+  *nfc_cs_pin = 1;
+}
+
+/*
+ * Get the IRQ pin's state
+ */
+bool pn532_irq_pin_get(void)
+{
+  return (nfc_irq_pin_isr->read() ? false : true);
+}
+
+/*
+ * Set the CS pin to 0 (active low)
+ */
+void pn532_cs_set(void)
+{
+  *nfc_cs_pin = 0;
+}
+
+/*
+ * Set the CS pin to 1 (active high)
+ */
+void pn532_cs_clear(void)
+{
+  *nfc_cs_pin = 1;
+}
+
+/*
+ * You MUST call pn532_irq() on each falling front of IRQ pin
+ */
+#endif
+
+#if MUNFC_RTOS
+struct rtos_semaphore //To be defined by impl
+{
+  Semaphore* s;
+};
+
+struct rtos_semaphore* rtos_semaphore_new() //Should return NULL if fails
+{
+  struct rtos_semaphore* pSem;
+  pSem = new struct rtos_semaphore;
+  pSem->s = new Semaphore(1);
+  pSem->s->wait(osWaitForever);
+  return pSem;
+}
+
+int rtos_semaphore_produce(struct rtos_semaphore* pSem)
+{
+    pSem->s->release();
+    return OK;
+}
+
+int rtos_semaphore_consume(struct rtos_semaphore* pSem, int timeout)
+{
+    int resid;
+    if(timeout == -1)
+    {
+      resid = pSem->s->wait(osWaitForever);
+    }
+    else
+    {
+      resid = pSem->s->wait(timeout);
+    }
+    if(resid>0)
+    {
+      while( pSem->s->wait(0) > 0 );
+      return OK;
+    }
+    else
+    {
+      return ERR_TIMEOUT;
+    }
+}
+#else
+struct rtos_semaphore //To be defined by impl
+{
+    volatile int p;
+};
+
+struct rtos_semaphore* rtos_semaphore_new() //Should return NULL if fails
+{
+  struct rtos_semaphore* pSem;
+  pSem = new struct rtos_semaphore;
+  pSem->p = 1;
+  return pSem;
+}
+
+//Will only be called from ISR
+int rtos_semaphore_produce(struct rtos_semaphore* pSem)
+{
+    pSem->p++;
+    return OK;
+}
+
+void ___voidf(void)
+{
+
+}
+
+int rtos_semaphore_consume(struct rtos_semaphore* pSem, int timeout)
+{
+   if(timeout == -1)
+    {
+      while(!pSem->p)
+      {
+        __WFI();
+      }
+      pSem->p--;
+    }
+    else if(timeout == 0)
+    {
+      if(pSem->p)
+      {
+        pSem->p--;
+      }
+      else
+      {
+        return ERR_TIMEOUT;
+      }
+    }
+    else
+    {
+      Timer t;
+      t.start();
+      Ticker t_isr;
+      t_isr.attach_us(&___voidf, 1000); //Just to generate an interrupt periodically
+      while(!pSem->p)
+      {
+        __WFI();
+        if(t.read_ms()>=timeout)
+        {
+            return ERR_TIMEOUT;
+        }
+      }
+      pSem->p--;
+    }
+    return OK;
+}
+#endif
+
+
+//These functions must be implemented for each platform
+
+#if NFC_CONTROLLER == PN512
+/*
+ * Initialize SPI
+ */
+int pn512_spi_init()
+{
+  nfc_spi->format(8, 3);
+  nfc_spi->frequency(10000000); //To change to 10000000
+  return 0;
+}
+#endif
+
+#if NFC_CONTROLLER == PN532
+/*
+ * Initialize SPI
+ */
+int pn532_spi_init()
+{
+  nfc_spi->format(8, 0);
+  nfc_spi->frequency(5000000);
+  return 0;
+}
+#endif
+
+#define reverse(x) ( (x & 0x01) << 7 \
+                    | (x & 0x02) << 5 \
+                    | (x & 0x04) << 3 \
+                    | (x & 0x08) << 1 \
+                    | (x & 0x10) >> 1 \
+                    | (x & 0x20) >> 3 \
+                    | (x & 0x40) >> 5 \
+                    | (x & 0x80) >> 7 )
+
+/*
+ * After skipping outSkip bytes, write outLen bytes
+ * After skipping inSkip bytes, read inLen bytes
+ * This will generate MAX(outSkip + outLen, inSkip + inLen) transfers on the SPI bus
+ */
+int spi_transfer(uint8_t* outBuf, size_t outLen, size_t outSkip, uint8_t* inBuf,
+    size_t inLen, size_t inSkip)
+{
+  int len;
+  int writeb;
+  int readb;
+  int outPos;
+  int inPos;
+
+  outPos = inPos = 0;
+
+  len =
+      (outSkip + outLen) > (inSkip + inLen) ? (outSkip + outLen) :
+          (inSkip + inLen);
+
+  while (len--)
+  {
+    if (outSkip)
+    {
+      writeb = 0x00;
+      outSkip--;
+    }
+    else if (outPos < outLen)
+    {
+      writeb = outBuf[outPos];
+      outPos++;
+    }
+    else
+    {
+      writeb = 0x00;
+    }
+
+#if NFC_CONTROLLER == PN532
+    writeb = reverse(writeb);
+#endif
+
+    readb = nfc_spi->write(writeb);
+
+#if NFC_CONTROLLER == PN532
+    readb = reverse(readb);
+#endif
+
+    if (inSkip)
+    {
+      inSkip--;
+    }
+    else if (inPos < inLen)
+    {
+      inBuf[inPos] = readb;
+      inPos++;
+    }
+  }
+  return 0;
+}
+
+/*
+ * Write outLen bytes
+ */
+int spi_write(uint8_t* outBuf, size_t outLen)
+{
+  return spi_transfer(outBuf, outLen, 0, (uint8_t*) NULL, 0, 0);
+}
+
+/*
+ * Read inLen bytes
+ */
+int spi_read(uint8_t* inBuf, size_t inLen)
+{
+  return spi_transfer((uint8_t*) NULL, 0, 0, inBuf, inLen, 0);
+}
+
+/*
+ * Skip len bytes
+ */
+int spi_skip(size_t len)
+{
+  return spi_transfer((uint8_t*) NULL, 0, len, (uint8_t*) NULL, 0, len);
+}
+
+}
+