added support for pic32 (PIC32MX795F512L)

2012-12-17 09:14:23 +01:00 · 2012-12-17 09:14:23 +01:00 · f68df3a81c
commit f68df3a81c
parent 70e46f3248
21 changed files with 2414 additions and 0 deletions
--- a/cpu/pic32/pic32.c
+++ b/cpu/pic32/pic32.c
@ -0,0 +1,137 @@
+/*
+ * Contiki PIC32 Port project
+ * 
+ * Copyright (c) 2012,
+ *  Scuola Superiore Sant'Anna (http://www.sssup.it) and
+ *  Consorzio Nazionale Interuniversitario per le Telecomunicazioni
+ *  (http://www.cnit.it).
+ *
+ * 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.
+ *
+ */
+
+/**
+ * \addtogroup pic32-contiki-port PIC32 Contiki Port
+ *
+ * @{
+ */
+
+/** 
+ * \file   mtarch.h
+ * \brief  PIC32MX initialization routines
+ * \author Giovanni Pellerano <giovanni.pellerano@evilaliv3.org>
+ * \author Daniele Alessandrelli <d.alessandrelli@sssup.it>
+ * \date   2012-03-23
+ */
+
+/*
+ * PIC32MX795F512L - Specific Functions
+ * 
+ * All the functions in this part of the file are specific for the
+ * pic32mx795f512l that is characterized by registers' name that differ from
+ * the 3xx and 4xx families of the pic32mx.
+ */
+
+#include <pic32_irq.h>
+
+#include <p32xxxx.h>
+#include <peripheral/system.h> 
+#include <stdint.h>
+
+#include <dev/leds.h>
+
+/* General Excepiton Handler: overrides the default handler */
+static enum {
+  EXCEP_IRQ = 0,                /* interrupt */
+  EXCEP_AdEL = 4,               /* address error exception (load or ifetch) */
+  EXCEP_AdES,                   /* address error exception (store) */
+  EXCEP_IBE,                    /* bus error (ifetch) */
+  EXCEP_DBE,                    /* bus error (load/store) */
+  EXCEP_Sys,                    /* syscall */
+  EXCEP_Bp,                     /* breakpoint */
+  EXCEP_RI,                     /* reserved instruction */
+  EXCEP_CpU,                    /* coprocessor unusable */
+  EXCEP_Overflow,               /* arithmetic overflow */
+  EXCEP_Trap,                   /* trap (possible divide by zero) */
+  EXCEP_IS1 = 16,               /* implementation specfic 1 */
+  EXCEP_CEU,                    /* CorExtend unuseable */
+  EXCEP_C2E                     /* coprocessor 2 */
+} cp0_exception_code;
+
+static unsigned int cp0_exception_cause; /* CP0: CAUSE register */
+static unsigned int cp0_exception_epc;   /* CP0: Exception Program Counter */
+
+/*---------------------------------------------------------------------------*/
+void
+pic32_init(void)
+{
+  unsigned long int r;
+
+  ASM_DIS_INT;
+
+  /* Disable JTAG Port */
+  DDPCONbits.JTAGEN = 0;
+
+  // set the CP0 cause IV bit high
+  asm volatile("mfc0 %0,$13" : "=r"(r));
+  r |= 0x00800000;
+  asm volatile("mtc0 %0,$13" : "+r"(r));
+
+  INTCONSET = _INTCON_MVEC_MASK;
+
+  SYSKEY = 0;
+  SYSKEY = 0xaa996655;
+  SYSKEY = 0x556699aa;
+  
+  /* Enable Sleep Mode */
+  OSCCONCLR = 1 << _OSCCON_SLPEN_POSITION;
+  
+  SYSKEY = 0;
+
+  ASM_EN_INT;
+}
+
+
+/*---------------------------------------------------------------------------*/
+void
+_general_exception_handler(void)
+{
+  asm volatile ("mfc0 %0,$14":"=r" (cp0_exception_epc));
+
+  asm volatile ("mfc0 %0,$13":"=r" (cp0_exception_cause));
+
+  cp0_exception_code = (cp0_exception_cause >> 2) & 0x0000001F;
+  
+  leds_on(LEDS_ALL);
+
+  while(1){
+    ;
+  }
+}
+/*---------------------------------------------------------------------------*/
+
+/** @} */