Quick and dirty implementations of rom and xmem.

platform/cc2420dbk/dev/rom.c

@@ -0,0 +1,127 @@
+/*
+ * Copyright (c) 2007, Swedish Institute of Computer Science
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * @(#)$Id: rom.c,v 1.1 2007/02/02 14:08:22 bg- Exp $
+ */
+
+#include <stdio.h>
+
+#include <avr/boot.h>
+#include <avr/pgmspace.h>
+
+#include "contiki.h"
+
+#include "lib/assert.h"
+
+#include "dev/rom.h"
+
+#if 0
+#define PRINTF(...) printf(__VA_ARGS__)
+#else
+#define PRINTF(...) do {} while (0)
+#endif
+
+BOOTLOADER_SECTION
+int
+rom_erase(long nbytes, off_t offset)
+{
+  long nb = nbytes;
+
+  if(nbytes % ROM_ERASE_UNIT_SIZE != 0) {
+    return -1;
+  }
+
+  if(offset % ROM_ERASE_UNIT_SIZE != 0) {
+    return -1;
+  }
+
+  PRINTF("rom_erase(%ld, %06lx)\n", nbytes, offset);
+
+  while (nbytes > 0) {
+    spl_t s = splhigh();
+
+    eeprom_busy_wait();
+
+    boot_page_erase(offset);
+    boot_spm_busy_wait();
+
+    boot_rww_enable();		/* Before return or intr. */
+
+    splx(s);
+
+    nbytes -= ROM_ERASE_UNIT_SIZE;
+    offset += ROM_ERASE_UNIT_SIZE;
+  }
+
+  return nb;
+}
+
+int
+rom_pread(void *buf, int nbytes, off_t offset)
+{
+  PRINTF("rom_pread(%p, %d, %06lx)\n", buf, nbytes, offset);
+
+  assert(offset == (uintptr_t)offset);
+  assert((offset + nbytes) == (uintptr_t)(offset + nbytes));
+  memcpy_P(buf, (PGM_P)(uintptr_t)offset, nbytes);
+  return nbytes;
+}
+
+BOOTLOADER_SECTION
+int
+rom_pwrite(const void *buf, int nbytes, off_t offset)
+{
+  long nb = nbytes;
+  const unsigned char *from = buf;
+
+  PRINTF("rom_pwrite(%p, %d, %06lx)\n", buf, nbytes, offset);
+
+  while(nbytes > 0) {
+    int i, n = (nbytes > ROM_ERASE_UNIT_SIZE) ? ROM_ERASE_UNIT_SIZE : nbytes;
+    spl_t s = splhigh();
+
+    eeprom_busy_wait();
+
+    for (i = 0; i < n; i += 2) {
+      uint16_t w = *from++;
+      w |= (*from++) << 8;
+      boot_page_fill(offset + i, w);
+    }
+    boot_page_write(offset);
+    boot_spm_busy_wait();
+
+    boot_rww_enable();		/* Before return or intr. */
+
+    splx(s);
+
+    nbytes -= ROM_ERASE_UNIT_SIZE;
+    offset += ROM_ERASE_UNIT_SIZE;
+  }
+
+  return nb;
+}

platform/cc2420dbk/dev/xmem.c

@@ -0,0 +1,92 @@
+/*
+ * Copyright (c) 2007, Swedish Institute of Computer Science
+ * All rights reserved. 
+ *
+ * Redistribution and use in source and binary forms, with or without 
+ * modification, are permitted provided that the following conditions 
+ * are met: 
+ * 1. Redistributions of source code must retain the above copyright 
+ *    notice, this list of conditions and the following disclaimer. 
+ * 2. Redistributions in binary form must reproduce the above copyright 
+ *    notice, this list of conditions and the following disclaimer in the 
+ *    documentation and/or other materials provided with the distribution. 
+ * 3. Neither the name of the Institute nor the names of its contributors 
+ *    may be used to endorse or promote products derived from this software 
+ *    without specific prior written permission. 
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 
+ * SUCH DAMAGE. 
+ *
+ * @(#)$Id: xmem.c,v 1.1 2007/02/02 14:08:22 bg- Exp $
+ */
+
+/*
+ * External memory built from the AVR eeprom. It is incredibly slow!
+ */
+
+#include <stdio.h>
+
+#include <avr/eeprom.h>
+
+#include "contiki.h"
+
+#include "dev/xmem.h"
+
+#if 0
+#define PRINTF(...) printf(__VA_ARGS__)
+#else
+#define PRINTF(...) do {} while (0)
+#endif
+
+/*
+ */
+void
+xmem_init(void)
+{
+  PRINTF("xmem_init\n");
+}
+
+int
+xmem_pread(void *_p, int size, off_t offset)
+{
+  PRINTF("xmem_pread(%p, %d, %06lx)\n", _p, size, offset);
+
+  spl_t s = splhigh();
+  eeprom_busy_wait();
+  eeprom_read_block(_p, (void *)(uintptr_t)offset, size);
+  splx(s);
+  return size;
+}
+
+int
+xmem_pwrite(const void *_p, int size, off_t offset)
+{
+  PRINTF("xmem_pwrite(%p, %d, %06lx)\n", _p, size, offset);
+
+  spl_t s = splhigh();
+  eeprom_busy_wait();
+  eeprom_write_block(_p, (void *)(uintptr_t)offset, size);
+  splx(s);
+  return size;
+}
+
+int
+xmem_erase(long size, off_t offset)
+{
+  /*
+   * AVR internal eeprom has a kind of auto erase, thus nothing is
+   * done here.
+   */
+  PRINTF("xmem_erase(%ld, %06lx)\n", size, offset);
+
+  return size;
+}