For ease of declaration and definition of groups of tasks and queues the lifesensor_macros offer a set of easy to use task and queue creation shortcuts.
The LIFESENSOR_TASK() and LIFESENSOR_QUEUE() macro offer an easy interface to descibe the struct for a functional unit of the lifesensor. Each task or queue created with these shortcuts have to be initialized with the lifesensor_task_init() and respectively the lifesensor_queue_init() function.
LIFESENSOR_TASK(stacksize)
Construct a struct for a task. The stacksize is given in counts of StackType_t not in bytes. You can make use of MACRO_DEFAULT_STACK_SIZE. The structs task member will be the actual lifesensor_task_t which in turn contains the StaticTask_t.
LIFESENSOR_QUEUE(type, itemcount)
Construct a struct for a queue. The type attribute must be a valid datatype and will be used with sizeof. itemcount is the number of items of type which fit in the queue to be constructed. The structs queue memver will be the actual lifesensor_queue_t variable. Which in turn contains the StaticQueue_t.
lifesensor_task_init(anon_task, name, func, args, prio)
Initiazes a task created with LIFESENSOR_TASK() by passing in a pointer to it as first argument. For the name parameter a const char * is expected. func is expected to be a function pointer with its arguments passed in args as a void *. You can use tskIDLE_PRIORITY for the task priotity in the prio argument.
lifesensor_queue_init(anon_queue)
Initalizes a queue created with LIFESENSOR_QUEUE() by passing in a pointer to it as first argument. Generally this function should be called before passing a queue to i.e. a task as argument.
typedef struct {
LIFESENSOR_QUEUE(spo2_adc_sample_t, 16) adc_queue;
LIFESENSOR_TASK(4096) adc_task;
} spo2_t;
spo2_t spo2;void app_main()
{
lifesensor_queue_init(spo2.adc_queue);
lifesensor_task_init(
spo2.adc_task,
"spo2_adc",
spo2_runner,
&spo2.adc_queue.queue,
tskIDLE_PRIORITY
);
}none