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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
73 /*****************************************************************************
74 * Private types/enumerations/variables
75 ****************************************************************************/
76
77 /*****************************************************************************
78 * Public types/enumerations/variables
79 ****************************************************************************/
80
81 /*****************************************************************************
82 * Private functions
83 ****************************************************************************/
84
85 /* Sets up system hardware */
86 static void prvSetupHardware(void)
87 {
88 Board_Init();
89
90 /* Initial LED0 state is off */
91 Board_LED_Set(0, false);
92 }
93
94 /* LED1 toggle thread */
95 static portTASK_FUNCTION(vLEDTask1, pvParameters) {
96 bool LedState = false;
97
98 while (1) {
99 Board_LED_Set(0, LedState);
100 LedState = (bool) !LedState;
101
102 /* About a 3Hz on/off toggle rate */
103 vTaskDelay(configTICK_RATE_HZ / 6);
104 }
105 }
106
107 /* LED2 toggle thread */
108 static portTASK_FUNCTION(vLEDTask2, pvParameters) {
109 bool LedState = false;
110
111 while (1) {
112 Board_LED_Set(1, LedState);
113 LedState = (bool) !LedState;
114
115 /* About a 7Hz on/off toggle rate */
116 vTaskDelay(configTICK_RATE_HZ / 14);
117 }
118 }
119
120 /* UART (or output) thread */
121 static portTASK_FUNCTION(vUARTTask, pvParameters) {
122 int tickCnt = 0;
123
124 while (1) {
125 DEBUGOUT("Tick: %d \r\n", tickCnt);
126 tickCnt++;
127
128 /* About a 1s delay here */
129 vTaskDelay(configTICK_RATE_HZ);
130 }
131 }
132
133 /*****************************************************************************
134 * Public functions
135 ****************************************************************************/
136
141 int main(void)
142 {
143 prvSetupHardware();
144
145 /* LED1 toggle thread */
146 xTaskCreate(vLEDTask1, (signed char *) "vTaskLed1",
147 configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
148 (xTaskHandle *) NULL);
149
150 /* LED2 toggle thread */
151 xTaskCreate(vLEDTask2, (signed char *) "vTaskLed2",
152 configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
153 (xTaskHandle *) NULL);
154
155 /* UART output thread, simply counts seconds */
156 xTaskCreate(vUARTTask, (signed char *) "vTaskUart",
157 configMINIMAL_STACK_SIZE, NULL, (tskIDLE_PRIORITY + 1UL),
158 (xTaskHandle *) NULL);
159
160 /* Start the scheduler */
161 vTaskStartScheduler();
162
163 /* Should never arrive here */
164 return 1;
165 }
166