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freertos_blinky.c
Go to the documentation of this file.
1 /*
2 * @brief FreeRTOS Blinky example
3 *
4 * @note
5 * Copyright(C) NXP Semiconductors, 2012
6 * All rights reserved.
7 *
8 * @par
9 * Software that is described herein is for illustrative purposes only
10 * which provides customers with programming information regarding the
11 * LPC products. This software is supplied "AS IS" without any warranties of
12 * any kind, and NXP Semiconductors and its licensor disclaim any and
13 * all warranties, express or implied, including all implied warranties of
14 * merchantability, fitness for a particular purpose and non-infringement of
15 * intellectual property rights. NXP Semiconductors assumes no responsibility
16 * or liability for the use of the software, conveys no license or rights under any
17 * patent, copyright, mask work right, or any other intellectual property rights in
18 * or to any products. NXP Semiconductors reserves the right to make changes
19 * in the software without notification. NXP Semiconductors also makes no
20 * representation or warranty that such application will be suitable for the
21 * specified use without further testing or modification.
22 *
23 * @par
24 * Permission to use, copy, modify, and distribute this software and its
25 * documentation is hereby granted, under NXP Semiconductors' and its
26 * licensor's relevant copyrights in the software, without fee, provided that it
27 * is used in conjunction with NXP Semiconductors microcontrollers. This
28 * copyright, permission, and disclaimer notice must appear in all copies of
29 * this code.
30 */
31
32 #include "board.h"
33 #include "FreeRTOS.h"
34 #include "task.h"
35
74 /*****************************************************************************
75 * Private types/enumerations/variables
76 ****************************************************************************/
77
78 /*****************************************************************************
79 * Public types/enumerations/variables
80 ****************************************************************************/
81
82 /*****************************************************************************
83 * Private functions
84 ****************************************************************************/
85
86 /* Sets up system hardware */
87 static void prvSetupHardware(void)
88 {
89 Board_Init();
90
91 /* Initial LED0 state is off */
92 Board_LED_Set(0, false);
93 }
94
95 /* LED1 toggle thread */
96 static portTASK_FUNCTION(vLEDTask1, pvParameters) {
97 bool LedState = false;
98
99 while (1) {
100 Board_LED_Set(0, LedState);
101 LedState = (bool) !LedState;
102
103 /* About a 3Hz on/off toggle rate */
104 vTaskDelay(configTICK_RATE_HZ / 6);
105 }
106 }
107
108 /* LED2 toggle thread */
109 static portTASK_FUNCTION(vLEDTask2, pvParameters) {
110 bool LedState = false;
111
112 while (1) {
113 Board_LED_Set(1, LedState);
114 LedState = (bool) !LedState;
115
116 /* About a 7Hz on/off toggle rate */
117 vTaskDelay(configTICK_RATE_HZ / 14);
118 }
119 }
120
121 /* UART (or output) thread */
122 static portTASK_FUNCTION(vUARTTask, pvParameters) {
123 int tickCnt = 0;
124
125 while (1) {
126 DEBUGOUT("Tick: %d\r\n", tickCnt);
127 tickCnt++;
128
129 /* About a 1s delay here */
130 vTaskDelay(configTICK_RATE_HZ);
131 }
132 }
133
134 /*****************************************************************************
135 * Public functions
136 ****************************************************************************/
137
142 int main(void)
143 {
144 prvSetupHardware();
145
146 /* LED1 toggle thread */
147 xTaskCreate(vLEDTask1, (signed char *) "vTaskLed1",
148 configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
149 (xTaskHandle *) NULL);
150
151 /* LED2 toggle thread */
152 xTaskCreate(vLEDTask2, (signed char *) "vTaskLed2",
153 configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
154 (xTaskHandle *) NULL);
155
156 /* UART output thread, simply counts seconds */
157 xTaskCreate(vUARTTask, (signed char *) "vTaskUart",
158 configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
159 (xTaskHandle *) NULL);
160
161 /* Start the scheduler */
162 vTaskStartScheduler();
163
164 /* Should never arrive here */
165 return 1;
166 }
167