2 FreeRTOS V8.2.3 - Copyright (C) 2015 Real Time Engineers Ltd.
\r
5 VISIT http://www.FreeRTOS.org TO ENSURE YOU ARE USING THE LATEST VERSION.
\r
7 This file is part of the FreeRTOS distribution.
\r
9 FreeRTOS is free software; you can redistribute it and/or modify it under
\r
10 the terms of the GNU General Public License (version 2) as published by the
\r
11 Free Software Foundation >>>> AND MODIFIED BY <<<< the FreeRTOS exception.
\r
13 ***************************************************************************
\r
14 >>! NOTE: The modification to the GPL is included to allow you to !<<
\r
15 >>! distribute a combined work that includes FreeRTOS without being !<<
\r
16 >>! obliged to provide the source code for proprietary components !<<
\r
17 >>! outside of the FreeRTOS kernel. !<<
\r
18 ***************************************************************************
\r
20 FreeRTOS is distributed in the hope that it will be useful, but WITHOUT ANY
\r
21 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
\r
22 FOR A PARTICULAR PURPOSE. Full license text is available on the following
\r
23 link: http://www.freertos.org/a00114.html
\r
25 ***************************************************************************
\r
27 * FreeRTOS provides completely free yet professionally developed, *
\r
28 * robust, strictly quality controlled, supported, and cross *
\r
29 * platform software that is more than just the market leader, it *
\r
30 * is the industry's de facto standard. *
\r
32 * Help yourself get started quickly while simultaneously helping *
\r
33 * to support the FreeRTOS project by purchasing a FreeRTOS *
\r
34 * tutorial book, reference manual, or both: *
\r
35 * http://www.FreeRTOS.org/Documentation *
\r
37 ***************************************************************************
\r
39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
\r
40 the FAQ page "My application does not run, what could be wrong?". Have you
\r
41 defined configASSERT()?
\r
43 http://www.FreeRTOS.org/support - In return for receiving this top quality
\r
44 embedded software for free we request you assist our global community by
\r
45 participating in the support forum.
\r
47 http://www.FreeRTOS.org/training - Investing in training allows your team to
\r
48 be as productive as possible as early as possible. Now you can receive
\r
49 FreeRTOS training directly from Richard Barry, CEO of Real Time Engineers
\r
50 Ltd, and the world's leading authority on the world's leading RTOS.
\r
52 http://www.FreeRTOS.org/plus - A selection of FreeRTOS ecosystem products,
\r
53 including FreeRTOS+Trace - an indispensable productivity tool, a DOS
\r
54 compatible FAT file system, and our tiny thread aware UDP/IP stack.
\r
56 http://www.FreeRTOS.org/labs - Where new FreeRTOS products go to incubate.
\r
57 Come and try FreeRTOS+TCP, our new open source TCP/IP stack for FreeRTOS.
\r
59 http://www.OpenRTOS.com - Real Time Engineers ltd. license FreeRTOS to High
\r
60 Integrity Systems ltd. to sell under the OpenRTOS brand. Low cost OpenRTOS
\r
61 licenses offer ticketed support, indemnification and commercial middleware.
\r
63 http://www.SafeRTOS.com - High Integrity Systems also provide a safety
\r
64 engineered and independently SIL3 certified version for use in safety and
\r
65 mission critical applications that require provable dependability.
\r
73 /* Scheduler include files. */
\r
74 #include "FreeRTOS.h"
\r
77 /* Demo program include files. */
\r
79 #include "demoGpio.h"
\r
81 #define x7segSTACK_SIZE configMINIMAL_STACK_SIZE
\r
83 static void prvRefreshTask( void *pvParameters );
\r
84 static void prvCountTask( void *pvParameters );
\r
86 /* Value to output to 7 segment display
\r
87 led_digits[0] is the right most digit */
\r
88 static signed char seg7_digits[4];
\r
90 void vStart7SegTasks( unsigned portBASE_TYPE uxPriority )
\r
92 xTaskCreate( prvRefreshTask, "7SegRefresh", x7segSTACK_SIZE, NULL, uxPriority, ( TaskHandle_t *) NULL );
\r
93 xTaskCreate( prvCountTask, "7SegCount", x7segSTACK_SIZE, NULL, uxPriority, ( TaskHandle_t *) NULL );
\r
95 /*-----------------------------------------------------------*/
\r
97 static void prvRefreshTask( void *pvParameters )
\r
99 /* This is table 3.3 from the Spartan-3 Starter Kit board user guide */
\r
100 const unsigned char bits[ 16 ] =
\r
120 const unsigned char apsx[4] =
\r
128 TickType_t xRefreshRate, xLastRefreshTime;
\r
130 /* Digit to scan */
\r
135 /* We need to initialise xLastRefreshTime prior to the first call to
\r
136 vTaskDelayUntil(). */
\r
137 xLastRefreshTime = xTaskGetTickCount();
\r
141 for( d = 0; d < 4; d++ )
\r
143 vTaskDelayUntil ( &xLastRefreshTime, xRefreshRate );
\r
145 /* Display digit */
\r
147 if( ( seg7_digits[ 1 ] == 4 ) || ( seg7_digits[ 1 ] == 5 ) )
\r
149 gpio->out.digit = apsx[ d ];
\r
153 gpio->out.digit = bits[ seg7_digits[ d ] ];
\r
157 gpio->out.an = ~(1 << d);
\r
161 /*-----------------------------------------------------------*/
\r
163 static void prvCountTask( void *pvParameters )
\r
165 TickType_t xCountRate, xLastCountTime;
\r
167 /* Approximately 20HZ */
\r
168 xCountRate = configTICK_RATE_HZ / 20;
\r
170 /* We need to initialise xLastCountTime prior to the first call to
\r
171 vTaskDelayUntil(). */
\r
172 xLastCountTime = xTaskGetTickCount();
\r
176 vTaskDelayUntil( &xLastCountTime, xCountRate );
\r
178 /* Really ugly way to do BCD arithmetic.... */
\r
179 seg7_digits[ 0 ] -= 1;
\r
180 if( seg7_digits[ 0 ] < 0 )
\r
182 seg7_digits[ 0 ] = 9;
\r
183 seg7_digits[ 1 ] -= 1;
\r
184 if( seg7_digits[ 1 ] < 0 )
\r
186 seg7_digits[ 1 ] = 9;
\r
187 seg7_digits[ 2 ] -= 1;
\r
188 if( seg7_digits[ 2 ] < 0 )
\r
190 seg7_digits[ 2 ] = 9;
\r
191 seg7_digits[ 3 ] -= 1;
\r
192 if( seg7_digits[ 3 ] < 0 )
\r
194 seg7_digits[ 3 ] = 9;
\r