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commit 3b82efc0ed8b2b8a57c57340baefc8b1b7be8cab Author: Jerzy Kasenberg <[email protected]> AuthorDate: Thu Oct 22 12:26:37 2026 +0200 apps/eventq_task: Add STATIC_EVENTQ_TASK_DEFINE example Small application showing a task defined with STATIC_EVENTQ_TASK_DEFINE() from util/static_task. A callout on the task's event queue blinks the LED, one event is put on the queue during sysinit before the task is started and another one by main; both print the name of the task that handled them. Assisted-by: Claude:claude-opus-5-5 Signed-off-by: Jerzy Kasenberg <[email protected]> --- apps/eventq_task/pkg.yml | 38 ++++++++++++++++++++ apps/eventq_task/src/main.c | 86 +++++++++++++++++++++++++++++++++++++++++++++ apps/eventq_task/syscfg.yml | 33 +++++++++++++++++ 3 files changed, 157 insertions(+) diff --git a/apps/eventq_task/pkg.yml b/apps/eventq_task/pkg.yml new file mode 100644 index 000000000..958179658 --- /dev/null +++ b/apps/eventq_task/pkg.yml @@ -0,0 +1,38 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you 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 +# +# http://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. +# + +pkg.name: apps/eventq_task +pkg.type: app +pkg.description: > + Example of task with its own event queue defined with + STATIC_EVENTQ_TASK_DEFINE() from util/static_task. +pkg.author: "Apache Mynewt <[email protected]>" +pkg.homepage: "http://mynewt.apache.org/"; +pkg.keywords: + +pkg.deps: + - "@apache-mynewt-core/kernel/os" + - "@apache-mynewt-core/hw/hal" + - "@apache-mynewt-core/sys/console" + - "@apache-mynewt-core/sys/log" + - "@apache-mynewt-core/sys/sysinit" + - "@apache-mynewt-core/util/static_task" + +pkg.init: + eventq_task_app_init: 'MYNEWT_VAL(EVENTQ_TASK_APP_SYSINIT_STAGE)' diff --git a/apps/eventq_task/src/main.c b/apps/eventq_task/src/main.c new file mode 100644 index 000000000..8ecbd5a96 --- /dev/null +++ b/apps/eventq_task/src/main.c @@ -0,0 +1,86 @@ +/* + * Licensed to the Apache Software Foundation (ASF) under one + * or more contributor license agreements. See the NOTICE file + * distributed with this work for additional information + * regarding copyright ownership. The ASF licenses this file + * to you 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 + * + * http://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. + */ + +#include <assert.h> + +#include "os/mynewt.h" +#include "bsp/bsp.h" +#include "hal/hal_gpio.h" +#include "console/console.h" +#include "static_task/static_task.h" + +/* + * Defines task blink_task, its stack and event queue blink_evq. + * The task is created by sysinit at STATIC_TASK_SYSINIT_STAGE and + * processes events from blink_evq forever; no task handler or + * os_task_init() call is needed. + */ +STATIC_EVENTQ_TASK_DEFINE(blink, MYNEWT_VAL(EVENTQ_TASK_PRIO), + MYNEWT_VAL(EVENTQ_TASK_STACK_SIZE)); + +static struct os_callout blink_callout; + +static void +hello_ev_cb(struct os_event *ev) +{ + console_printf("%s from task %s\n", (const char *)ev->ev_arg, + os_sched_get_current_task()->t_name); +} + +/* Put on blink_evq during sysinit, before blink task exists */ +static struct os_event early_ev = { + .ev_cb = hello_ev_cb, + .ev_arg = "Event queued during sysinit", +}; + +/* Put on blink_evq from main task */ +static struct os_event main_ev = { + .ev_cb = hello_ev_cb, + .ev_arg = "Event queued by main", +}; + +static void +blink_timer_cb(struct os_event *ev) +{ + /* Callout events are delivered to blink_evq, this runs in blink task */ + hal_gpio_toggle(LED_BLINK_PIN); + os_callout_reset(&blink_callout, OS_TICKS_PER_SEC); +} + +void +eventq_task_app_init(void) +{ + hal_gpio_init_out(LED_BLINK_PIN, 1); + + /* blink_evq is statically initialized, it can be used right away */ + os_callout_init(&blink_callout, &blink_evq, blink_timer_cb, NULL); + os_callout_reset(&blink_callout, OS_TICKS_PER_SEC); + + os_eventq_put(&blink_evq, &early_ev); +} + +int +mynewt_main(int argc, char **argv) +{ + sysinit(); + + os_eventq_put(&blink_evq, &main_ev); + + os_eventq_loop(os_eventq_dflt_get()); +} diff --git a/apps/eventq_task/syscfg.yml b/apps/eventq_task/syscfg.yml new file mode 100644 index 000000000..29ef002b2 --- /dev/null +++ b/apps/eventq_task/syscfg.yml @@ -0,0 +1,33 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you 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 +# +# http://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. +# + +syscfg.defs: + EVENTQ_TASK_PRIO: + description: 'Priority of the blink task.' + type: task_priority + value: 10 + EVENTQ_TASK_STACK_SIZE: + description: 'Stack size of the blink task (os_stack_t units).' + value: 256 + EVENTQ_TASK_APP_SYSINIT_STAGE: + description: > + Sysinit stage of application init function. Runs before + STATIC_TASK_SYSINIT_STAGE to show that events can be put on + the queue before its task is started. + value: 500
