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sram/UserApplication.c
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1 /* This file has been prepared for Doxygen automatic documentation generation.*/
2 /**
3 * \file
4 *
5 * \brief
6 * Example application for the SRAM test.
7 *
8 * This example shows how the SRAM test can be embedded in an application.
9 * The application lights up an LED that signals correct behavior of the
10 * system. Then it enters the main loop, where the SRAM test is called
11 * periodically. This test is based on March X and it checks a segment of
12 * SRAM memory at a time. After the SRAM test, a second LED is toggled in
13 * order to visualize when the partial tests are finished. If errors were
14 * found, the global error flag would be set by the test. This would lead
15 * to the application leaving the main loop and switching off the first LED.
16 *
17 * The configuration for memory size, amount of segments, buffer size, etc.
18 * can bet set up in classb_sram.h. Note that if GCC is used and the size of
19 * the test buffer changes (as a result of a change in the number of segments
20 * or the amount of segment overlap), the new buffer size must be configured
21 * in the linker as well. See \ref classb_sram for more details.
22 *
23 * \par Application note:
24 * AVR1610: Guide to IEC60730 Class B compliance with XMEGA
25 *
26 * \par Documentation
27 * For comprehensive code documentation, supported compilers, compiler
28 * settings and supported devices see readme.html
29 *
30 * \author
31 * Atmel Corporation: http://www.atmel.com \n
32 * Support email: avr@atmel.com
33 *
34 * Copyright (C) 2012 Atmel Corporation. All rights reserved.
35 *
36 * \page License
37 *
38 * Redistribution and use in source and binary forms, with or without
39 * modification, are permitted provided that the following conditions are met:
40 *
41 * 1. Redistributions of source code must retain the above copyright notice,
42 * this list of conditions and the following disclaimer.
43 *
44 * 2. Redistributions in binary form must reproduce the above copyright notice,
45 * this list of conditions and the following disclaimer in the documentation
46 * and/or other materials provided with the distribution.
47 *
48 * 3. The name of Atmel may not be used to endorse or promote products derived
49 * from this software without specific prior written permission.
50 *
51 * 4. This software may only be redistributed and used in connection with an
52 * Atmel AVR product.
53 *
54 * THIS SOFTWARE IS PROVIDED BY ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
55 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
56 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
57 * EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
58 * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
59 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
60 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
61 * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
62 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
63 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
64 * DAMAGE.
65 */
66
67 #include "avr_compiler.h"
68 #include "classb_sram.h"
69
70 #if __AVR_ATxmega256A3BU__ | __ATxmega256A3BU__
71 # define LEDPORT PORTR
72 # define SWITCHPORT PORTE
73 # define SWITCH_INT0_vect PORTE_INT0_vect
74 # define XPLAIN_PULLUP 0x00
75 #elif defined(__AVR_ATxmega128A1__) | defined(__ATxmega128A1__)
76 # define LEDPORT PORTE
77 # define SWITCHPORT PORTF
78 # define SWITCH_INT0_vect PORTF_INT0_vect
79 # define XPLAIN_PULLUP PORT_OPC_PULLUP_gc
80 #endif
81
82 void setup_led_switches() {
83
84 // Set direction and state of LED pins
85 LEDPORT.DIRSET = PIN0_bm | PIN1_bm;
86 PORTCFG.MPCMASK = PIN0_bm | PIN1_bm;
87 LEDPORT.PIN0CTRL |= PORT_INVEN_bm;
88
89 // Set sensitivity, polarity and pull-up for button PIN
90 SWITCHPORT.PIN5CTRL = PORT_ISC_FALLING_gc | PORT_INVEN_bm | XPLAIN_PULLUP;
91 SWITCHPORT.INT0MASK |= PIN5_bm;
92 SWITCHPORT.INTCTRL |= PORT_INT0LVL_LO_gc;
93
94 // Enable LOW level interrupts in the INT controller
95 PMIC.CTRL |= PMIC_LOLVLEN_bm;
96
97 // Turn on LED that signals correct operation
98 LEDPORT.OUTSET = PIN0_bm;
99 }
100
101
102 /** \brief Global error variable */
103 NO_INIT volatile uint8_t classb_error;
104
105
106 /*! \brief
107 * Main entry point of the application. Sets up board hardware,
108 * and waits until an error has occurred.
109 * \callgraph
110 */
111 int main(void)
112 {
113
114 setup_led_switches();
115 // Turn on interrupts globally.
116 sei();
117 while(!classb_error) {
118 cli();
119 classb_sram_test();
120 sei();
121 //Toggle the second LED when test is ready.
122 LEDPORT.OUTTGL = PIN1_bm;
123 };
124
125 // If this is executed there has been an error.
126 // Disable interrupts
127 cli();
128 // Turn off LED to indicate error.
129 LEDPORT.OUTCLR = PIN0_bm;
130
131 }
132
133 /*! \brief
134 * Button press interrupt.
135 * \callgraph
136 */
137 ISR(SWITCH_INT0_vect)
138 {
139
140 }