Added Renesas RX62N port of Ethernet datalink from Renesas Rulz contest.

2011-07-26 04:23:09 +00:00
parent 3c9c235d28
commit c14837ae73
14 changed files with 3230 additions and 0 deletions
@@ -0,0 +1,106 @@
+/**************************************************************************
+*
+* Copyright (C) 2011 Steve Karg <skarg@users.sourceforge.net>
+*
+* Permission is hereby granted, free of charge, to any person obtaining
+* a copy of this software and associated documentation files (the
+* "Software"), to deal in the Software without restriction, including
+* without limitation the rights to use, copy, modify, merge, publish,
+* distribute, sublicense, and/or sell copies of the Software, and to
+* permit persons to whom the Software is furnished to do so, subject to
+* the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*********************************************************************/
+#include <stdbool.h>
+#include <stdint.h>
+#include "hardware.h"
+#include "timer.h"
+
+/* counter for the the timer which wraps every 49.7 days */
+static volatile uint32_t Millisecond_Counter;
+static volatile uint8_t Millisecond_Counter_Byte;
+/* forward prototype for interrupt service routine */
+void int_cmt0_isr(void);
+
+/*************************************************************************
+* Description: Timer Interrupt Handler
+* Returns: nothing
+* Notes: none
+*************************************************************************/
+static void timer_interrupt_handler(
+    void)
+{
+    Millisecond_Counter++;
+    Millisecond_Counter_Byte++;
+}
+
+/*************************************************************************
+* Description: Timer Interrupt Service Routine
+* Returns: nothing
+* Notes: none
+*************************************************************************/
+void int_cmt0_isr(void)
+{
+    timer_interrupt_handler();
+}
+
+/*************************************************************************
+* Description: returns the current millisecond count
+* Returns: none
+* Notes: This method only disables the timer overflow interrupt.
+*************************************************************************/
+uint32_t timer_milliseconds(
+    void)
+{
+    uint32_t timer_value;       /* return value */
+
+    timer_value = Millisecond_Counter;
+
+    return timer_value;
+}
+
+/*************************************************************************
+* Description: returns the current millisecond count
+* Returns: none
+* Notes: This method only disables the timer overflow interrupt.
+*************************************************************************/
+uint8_t timer_milliseconds_byte(
+    void)
+{
+    return Millisecond_Counter;
+}
+
+/*************************************************************************
+* Description: Initialization for Timer
+* Returns: none
+* Notes: none
+*************************************************************************/
+void timer_init(
+    void)
+{
+    /* Declare error flag */
+    bool err = true;
+
+    /* CMT is configured for a 1ms interval, and executes the callback
+     function CB_CompareMatch on every compare match */
+    err &= R_CMT_Create(
+        3,
+        PDL_CMT_PERIOD,
+        1E-3,
+        int_cmt0_isr,
+        3
+      );
+
+    /* Halt in while loop when RPDL errors detected */
+    while(!err);
+}