1 /* Adapted for use with IAR Embedded Workbench */
2 /***********************************************************************************************************************
3 * DISCLAIMER
4 * This software is supplied by Renesas Electronics Corporation and is only intended for use with Renesas products. No
5 * other uses are authorized. This software is owned by Renesas Electronics Corporation and is protected under all
6 * applicable laws, including copyright laws.
7 * THIS SOFTWARE IS PROVIDED "AS IS" AND RENESAS MAKES NO WARRANTIES REGARDING
8 * THIS SOFTWARE, WHETHER EXPRESS, IMPLIED OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY,
9 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. ALL SUCH WARRANTIES ARE EXPRESSLY DISCLAIMED. TO THE MAXIMUM
10 * EXTENT PERMITTED NOT PROHIBITED BY LAW, NEITHER RENESAS ELECTRONICS CORPORATION NOR ANY OF ITS AFFILIATED COMPANIES
11 * SHALL BE LIABLE FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES FOR ANY REASON RELATED TO THIS
12 * SOFTWARE, EVEN IF RENESAS OR ITS AFFILIATES HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
13 * Renesas reserves the right, without notice, to make changes to this software and to discontinue the availability of
14 * this software. By using this software, you agree to the additional terms and conditions found by accessing the
15 * following link:
16 * http://www.renesas.com/disclaimer
17 *
18 * Copyright (C) 2012 Renesas Electronics Corporation. All rights reserved.
19 ***********************************************************************************************************************/
20 /***********************************************************************************************************************
21 * File Name : hwsetup.c
22 * Version : 1.0
23 * Device(s) : RX
24 * H/W Platform : RX65N
25 * Description : Defines the initialisation routines used each time the MCU is restarted.
26 ***********************************************************************************************************************/
27
28 /***********************************************************************************************************************
29 Includes <System Includes> , "Project Includes"
30 ***********************************************************************************************************************/
31 #include <stdint.h>
32 #include <intrinsics.h>
33
34 /* Contains delcarations for the functions defined in this file */
35 #include "hwsetup.h"
36
37 /***********************************************************************************************************************
38 Private global variables and functions
39 ***********************************************************************************************************************/
40 /* Clock configuration function delcaration */
41 void operating_frequency_set(void);
42
43 /* MCU I/O port configuration function delcaration */
44 //static void output_ports_configure(void);
45
46 /* Interrupt configuration function delcaration */
47 static void interrupts_configure(void);
48
49 /* MCU peripheral module configuration function declaration */
50 //static void peripheral_modules_enable(void);
51
52
53 /*******************************************************************************
54 * Function name: hardware_setup
55 * Description : Contains setup functions called at device restart
56 * Arguments : none
57 * Return value : none
58 *******************************************************************************/
hardware_setup(void)59 void hardware_setup(void)
60 {
61 operating_frequency_set();
62 interrupts_configure();
63 }
64
65
66
67 /*******************************************************************************
68 * Function name: operating_frequency_set
69 * Description : Configures the clock settings for each of the device clocks
70 * Arguments : none
71 * Return value : none
72 *******************************************************************************/
operating_frequency_set(void)73 void operating_frequency_set(void)
74 {
75
76 /*
77 Clock Description Frequency
78 ----------------------------------------
79 Input Clock Frequency............ 24 MHz
80 Divisor.......................... 2
81 PLL frequency (x16).............. 192 MHz
82 Internal Clock Frequency......... 96 MHz
83 Peripheral Clock Frequency....... 48 MHz
84 USB Clock Frequency.............. 48 MHz
85 External Bus Clock Frequency..... 24 MHz */
86
87 volatile unsigned int i;
88
89 /* Protect off. */
90 SYSTEM.PRCR.WORD = 0xA50B;
91
92 /* Uncomment if not using sub-clock */
93 //SYSTEM.SOSCCR.BYTE = 0x01; /* stop sub-clock */
94 SYSTEM.SOSCCR.BYTE = 0x00; /* Enable sub-clock for RTC */
95
96 /* Wait 131,072 cycles * 12 MHz = 10.9 ms */
97 SYSTEM.MOSCWTCR.BYTE = 0x0D;
98
99 /* x16 @PLL, 2 divisor */
100 SYSTEM.PLLCR.WORD = 0x0F01;
101
102 /* EXTAL ON */
103 SYSTEM.MOSCCR.BYTE = 0x00;
104
105 /* PLL ON */
106 SYSTEM.PLLCR2.BYTE = 0x00;
107
108 for(i = 0;i< 0x168;i++)
109 {
110 /* Wait over 12ms */
111 __no_operation();
112 }
113
114 /* Setup system clocks
115 SCKCR - System Clock Control Register
116 b31:b28 FCK[3:0] 0x02 = Flash clock: PLL/4 = (192 / 4) = 48 MHz
117 b27:b24 ICK[3:0] 0x01 = System clock: PLL/2 = (192 / 2) = 96 MHz
118 b23 PSTOP1 0x00 = BCLK pin output is enabled
119 b19:b16 BCK[3:0] 0x03 = BCLK: PLL/8 = 24 MHz
120 b11:b8 PCKB[3:0] 0x02 = Peripheral clock B: PLL/4 = 48 MHz
121 */
122 SYSTEM.SCKCR.LONG = 0x21031222; /* ICK=PLL/2,BCK,FCK,PCK=PLL/4 */
123
124 /* Setup IEBUS and USB clocks
125 SCKCR2 - System Clock Control Register 2
126 b7:b4 UCK[3:0] 0x03 = USB clock is PLL/4 = 48 MHz
127 b3:b0 IEBCK[3:0] 0x01 = IE Bus clock is PLL/2 = 96 MHz
128 */
129 SYSTEM.SCKCR2.WORD = 0x0031;
130
131 /* ICLK, PCLKB, FCLK, BCLK, IECLK, and USBCLK all come from PLL circuit */
132 SYSTEM.SCKCR3.WORD = 0x0400;
133
134 /* Protect on. */
135 SYSTEM.PRCR.WORD = 0xA500;
136 }
137
138
139 /***********************************************************************************************************************
140 * Function name: interrupts_configure
141 * Description : Configures interrupts used
142 * Arguments : none
143 * Return value : none
144 ***********************************************************************************************************************/
interrupts_configure(void)145 void interrupts_configure(void)
146 {
147 /* Protect off. */
148 SYSTEM.PRCR.WORD = 0xA50B;
149
150 /* Enable the bus error interrupt to catch accesses to illegal/reserved areas
151 of memory. */
152
153 /* Clear any pending interrupts */
154 IR(BSC,BUSERR) = 0;
155 /* Make this the highest priority interrupt (adjust as necessary for your
156 application) */
157 IPR(BSC,BUSERR) = 0x0F;
158 /* Enable the interrupt in the ICU */
159 IEN(BSC,BUSERR) = 1;
160 /* Enable illegal address interrupt in the BSC */
161 BSC.BEREN.BIT.IGAEN = 1;
162 }
163
164
165 /******************************************************************************
166 * Function name: buserr_isr
167 * Description : Sample ISR for bus error (must do hardware setup first!)
168 * By default, this demo code enables the Bus Error Interrupt.
169 * This interrupt will fire if the user tries to access code
170 * or data from one of the reserved areas in the memory map,
171 * including the areas covered by disabled chip selects.
172 * A nop statement is included here as a convenient place
173 * to set a breakpoint during debugging and development, and
174 * further handling should be added by the user for their
175 * application.
176 * Arguments : none
177 * Return value : none
178 ******************************************************************************/
179 #pragma vector = VECT_BSC_BUSERR
buserr_isr(void)180 __interrupt void buserr_isr(void)
181 {
182 /* To find the address that was accessed when the bus error occured, read
183 the register BSC.BERSR2.WORD. The upper 13 bits of this register
184 contain the upper 13-bits of the offending address (in 512K byte units).
185 */
186
187 /* Add your own code here to handle this interrupt */
188 __no_operation();
189 }
190
