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Blinky.c
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Blinky.c
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/*---------------------------------------------------------------------------
* Copyright (c) 2022 Arm Limited (or its affiliates). All rights reserved.
*
* SPDX-License-Identifier: Apache-2.0
*
* Licensed under the Apache License, Version 2.0 (the License); you may
* not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an AS IS BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Name: Blinky.c
* Purpose: RTX example program
*
*---------------------------------------------------------------------------*/
#include "main.h"
#include "cmsis_os2.h"
#include "cmsis_vio.h"
static osThreadId_t tid_thrLED; // Thread id of thread: LED
static osThreadId_t tid_thrButton; // Thread id of thread: Button
/*---------------------------------------------------------------------------
thrLED: blink LED
*---------------------------------------------------------------------------*/
__NO_RETURN static void thrLED (void *arg) {
uint32_t active_flag = 0U;
(void)arg;
for (;;) {
if (osThreadFlagsWait(1U, osFlagsWaitAny, 0U) == 1U) {
active_flag ^= 1U;
}
if (active_flag == 1U) {
vioSetSignal(vioLED0, vioLEDoff); // Switch LED0 off
vioSetSignal(vioLED1, vioLEDon); // Switch LED1 on
osDelay(100U); // Delay 100 ms
vioSetSignal(vioLED0, vioLEDon); // Switch LED0 on
vioSetSignal(vioLED1, vioLEDoff); // Switch LED1 off
osDelay(100U); // Delay 100 ms
}
else {
vioSetSignal(vioLED0, vioLEDon); // Switch LED0 on
osDelay(500U); // Delay 500 ms
vioSetSignal(vioLED0, vioLEDoff); // Switch LED0 off
osDelay(500U); // Delay 500 ms
}
}
}
/*---------------------------------------------------------------------------
thrButton: check Button state
*---------------------------------------------------------------------------*/
__NO_RETURN static void thrButton (void *arg) {
uint32_t last = 0U;
uint32_t state;
(void)arg;
for (;;) {
state = (vioGetSignal(vioBUTTON0)); // Get pressed Button state
if (state != last) {
if (state == 1U) {
osThreadFlagsSet(tid_thrLED, 1U); // Set flag to thrLED
}
last = state;
}
osDelay(100U);
}
}
/*---------------------------------------------------------------------------
* Application main thread
*---------------------------------------------------------------------------*/
static void app_main (void *argument) {
(void)argument;
tid_thrLED = osThreadNew(thrLED, NULL, NULL); // Create LED thread
if (tid_thrLED == NULL) { /* add error handling */ }
tid_thrButton = osThreadNew(thrButton, NULL, NULL); // Create Button thread
if (tid_thrButton == NULL) { /* add error handling */ }
osThreadExit();
}
/*---------------------------------------------------------------------------
* Application initialization
*---------------------------------------------------------------------------*/
void app_initialize (void) {
osThreadNew(app_main, NULL, NULL);
}