2 FreeRTOS V9.0.0 - Copyright (C) 2016 Real Time Engineers Ltd.
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14 >>! NOTE: The modification to the GPL is included to allow you to !<<
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34 * tutorial book, reference manual, or both: *
35 * http://www.FreeRTOS.org/Documentation *
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39 http://www.FreeRTOS.org/FAQHelp.html - Having a problem? Start by reading
40 the FAQ page "My application does not run, what could be wrong?". Have you
41 defined configASSERT()?
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65 mission critical applications that require provable dependability.
77 * Instead of the normal single demo application, the PIC18F demo is split
78 * into several smaller programs of which this is the first. This enables the
79 * demo's to be executed on the RAM limited PIC-devices.
81 * The Demo1 project is configured for a PIC18F4620 device. Main.c starts 9
82 * tasks (including the idle task).
84 * This first demo is included to do a quick check on the FreeRTOS
85 * installation. It is also included to demonstrate a minimal project-setup
86 * to use FreeRTOS in a wizC environment.
88 * Eight independant tasks are created. All tasks share the same taskcode.
89 * Each task blinks a different led on portB. The blinkrate for each task
90 * is different, but chosen in such a way that portB will show a binary
91 * counter pattern. All blinkrates are derived from a single master-rate.
92 * By default, this masterrate is set to 100 milliseconds. Although such
93 * a low value will make it almost impossible to see some of the leds
94 * actually blink, it is a good value when using the wizC-simulator.
95 * When testing on a real chip, changing the value to eg. 500 milliseconds
96 * would be appropiate.
99 /* Scheduler include files. */
100 #include <FreeRTOS.h>
103 #define mainBLINK_LED_INTERVAL ( ( TickType_t ) 100 / ( portTICK_PERIOD_MS ) )
105 /* The LED that is flashed by the B0 task. */
106 #define mainBLINK_LED0_PORT LATD
107 #define mainBLINK_LED0_TRIS TRISD
108 #define mainBLINK_LED0_PIN 0
109 #define mainBLINK_LED0_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED0_PIN))
111 /* The LED that is flashed by the B1 task. */
112 #define mainBLINK_LED1_PORT LATD
113 #define mainBLINK_LED1_TRIS TRISD
114 #define mainBLINK_LED1_PIN 1
115 #define mainBLINK_LED1_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED1_PIN))
117 /* The LED that is flashed by the B2 task. */
118 #define mainBLINK_LED2_PORT LATD
119 #define mainBLINK_LED2_TRIS TRISD
120 #define mainBLINK_LED2_PIN 2
121 #define mainBLINK_LED2_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED2_PIN))
123 /* The LED that is flashed by the B3 task. */
124 #define mainBLINK_LED3_PORT LATD
125 #define mainBLINK_LED3_TRIS TRISD
126 #define mainBLINK_LED3_PIN 3
127 #define mainBLINK_LED3_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED3_PIN))
129 /* The LED that is flashed by the B4 task. */
130 #define mainBLINK_LED4_PORT LATD
131 #define mainBLINK_LED4_TRIS TRISD
132 #define mainBLINK_LED4_PIN 4
133 #define mainBLINK_LED4_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED4_PIN))
135 /* The LED that is flashed by the B5 task. */
136 #define mainBLINK_LED5_PORT LATD
137 #define mainBLINK_LED5_TRIS TRISD
138 #define mainBLINK_LED5_PIN 5
139 #define mainBLINK_LED5_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED5_PIN))
141 /* The LED that is flashed by the B6 task. */
142 #define mainBLINK_LED6_PORT LATD
143 #define mainBLINK_LED6_TRIS TRISD
144 #define mainBLINK_LED6_PIN 6
145 #define mainBLINK_LED6_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED6_PIN))
147 /* The LED that is flashed by the B7 task. */
148 #define mainBLINK_LED7_PORT LATD
149 #define mainBLINK_LED7_TRIS TRISD
150 #define mainBLINK_LED7_PIN 7
151 #define mainBLINK_LED7_INTERVAL ((mainBLINK_LED_INTERVAL) << (mainBLINK_LED7_PIN))
160 const SBLINK sled0 = {&mainBLINK_LED0_PORT, &mainBLINK_LED0_TRIS, mainBLINK_LED0_PIN, mainBLINK_LED0_INTERVAL};
161 const SBLINK sled1 = {&mainBLINK_LED1_PORT, &mainBLINK_LED1_TRIS, mainBLINK_LED1_PIN, mainBLINK_LED1_INTERVAL};
162 const SBLINK sled2 = {&mainBLINK_LED2_PORT, &mainBLINK_LED2_TRIS, mainBLINK_LED2_PIN, mainBLINK_LED2_INTERVAL};
163 const SBLINK sled3 = {&mainBLINK_LED3_PORT, &mainBLINK_LED3_TRIS, mainBLINK_LED3_PIN, mainBLINK_LED3_INTERVAL};
164 const SBLINK sled4 = {&mainBLINK_LED4_PORT, &mainBLINK_LED4_TRIS, mainBLINK_LED4_PIN, mainBLINK_LED4_INTERVAL};
165 const SBLINK sled5 = {&mainBLINK_LED5_PORT, &mainBLINK_LED5_TRIS, mainBLINK_LED5_PIN, mainBLINK_LED5_INTERVAL};
166 const SBLINK sled6 = {&mainBLINK_LED6_PORT, &mainBLINK_LED6_TRIS, mainBLINK_LED6_PIN, mainBLINK_LED6_INTERVAL};
167 const SBLINK sled7 = {&mainBLINK_LED7_PORT, &mainBLINK_LED7_TRIS, mainBLINK_LED7_PIN, mainBLINK_LED7_INTERVAL};
170 * The task code for the "vBlink" task.
172 static portTASK_FUNCTION_PROTO(vBlink, pvParameters);
174 /*-----------------------------------------------------------*/
177 * Creates the tasks, then starts the scheduler.
182 * Start the blink tasks defined in this file.
184 xTaskCreate( vBlink, "B0", configMINIMAL_STACK_SIZE, &sled0, tskIDLE_PRIORITY, NULL );
185 xTaskCreate( vBlink, "B1", configMINIMAL_STACK_SIZE, &sled1, tskIDLE_PRIORITY, NULL );
186 xTaskCreate( vBlink, "B2", configMINIMAL_STACK_SIZE, &sled2, tskIDLE_PRIORITY, NULL );
187 xTaskCreate( vBlink, "B3", configMINIMAL_STACK_SIZE, &sled3, tskIDLE_PRIORITY, NULL );
188 xTaskCreate( vBlink, "B4", configMINIMAL_STACK_SIZE, &sled4, tskIDLE_PRIORITY, NULL );
189 xTaskCreate( vBlink, "B5", configMINIMAL_STACK_SIZE, &sled5, tskIDLE_PRIORITY, NULL );
190 xTaskCreate( vBlink, "B6", configMINIMAL_STACK_SIZE, &sled6, tskIDLE_PRIORITY, NULL );
191 xTaskCreate( vBlink, "B7", configMINIMAL_STACK_SIZE, &sled7, tskIDLE_PRIORITY, NULL );
194 * Start the scheduler.
196 vTaskStartScheduler( );
198 while(1) /* This point should never be reached. */
202 /*-----------------------------------------------------------*/
204 static portTASK_FUNCTION(vBlink, pvParameters)
206 unsigned char *Port = ((SBLINK *)pvParameters)->port;
207 unsigned char *Tris = ((SBLINK *)pvParameters)->tris;
208 unsigned char Pin = ((SBLINK *)pvParameters)->pin;
209 TickType_t Interval = ((SBLINK *)pvParameters)->interval;
211 TickType_t xLastWakeTime;
214 * Initialize the hardware
216 *Tris &= ~(1<<Pin); // Set the pin that is used by this task to ouput
217 *Port &= ~(1<<Pin); // Drive the pin low
220 * Initialise the xLastWakeTime variable with the current time.
222 xLastWakeTime = xTaskGetTickCount();
225 * Cycle for ever, delaying then toggle the LED.
230 * Wait until it is time to toggle
232 vTaskDelayUntil( &xLastWakeTime, Interval );
235 * Toggle the LED for visual feedback.