Contiki port for the Atmel AVR Raven board

2008-10-14 09:40:30 +00:00 · 2008-10-14 09:40:30 +00:00 · 0a961b2ada
commit 0a961b2ada
parent 3f394fe927
42 changed files with 5646 additions and 0 deletions
--- a/platform/avr-ravenlcd/sleep.c
+++ b/platform/avr-ravenlcd/sleep.c
@ -0,0 +1,120 @@
+/*
+ *  Copyright (c) 2008  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:
+ *
+ *  * Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ *  * 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.
+ *  * Neither the name of the copyright holders nor the names of
+ *    contributors may be used to endorse or promote products derived
+ *    from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT OWNER 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.
+ */
+/**
+ * \file
+ *
+ * \brief
+ *      This controls the sleep operation for the LCD.
+ *
+ * \author
+ *      Mike Vidales mavida404@gmail.com
+ *
+ */
+
+#include <avr/interrupt.h>
+#include <avr/sleep.h>
+#include <avr/wdt.h>
+#include <stdbool.h>
+#include "sleep.h"
+#include "uart.h"
+
+/**
+ * \addtogroup lcd
+ * \{
+*/
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *   \brief Prepares for and executes sleep. This function sets up the
+ *   processor to enter sleep mode, and to wake up when the joystick
+ *   button (PE2/PCINT2) is pressed.
+*/
+void
+sleep_now(void)
+{
+    /* Disable watchdog */
+    wdt_disable();
+
+    /* Setup sleep mode */
+    set_sleep_mode(SLEEP_MODE_PWR_DOWN);
+
+    /* Enable wakeup interrupt */
+    EIMSK |= (1 << PCIE0);
+    /* Enable PCINT2 as interrupt */
+    PCMSK0 |= (1 << PCINT2);
+
+    /* Go to sleep now */
+    sleep_mode();
+
+    /* Disable the interrupt for the enter button */
+    EIMSK &= ~(1 << PCIE0);
+}
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *   \brief This will send a single character forever to the ATmega1284p to cause a wakeup.
+ *
+ *   The 1284p polls the USART for new data during each sleep cycle.  Upon receiving a
+ *   character from the user LCD, it will wake up and send an acknowledgement frame.
+*/
+void
+sleep_wakeup(void)
+{
+    /* First, clear the input buffer and get any chars waiting */
+    while(rx_char_ready()){
+        uart_get_char_rx();
+    }
+
+    /* Flood 1284p with serial chars until it responds. */
+    for(;;){
+        uart_send_byte('x');
+        if (rx_char_ready())
+            break;
+    }
+    /* Get a frame back */
+    uart_serial_rcv_frame(true);
+}
+
+/*---------------------------------------------------------------------------*/
+
+/**
+ *   \brief This is the wake up button interrupt. When this interrupt fires,
+ *   nothing is done. The program will simply continue from the end of the sleep
+ *   command.
+*/
+ISR
+(PCINT0_vect)
+{
+
+}
+
+/** \}   */