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timer: example migrate to pytest

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This commit is contained in:
morris
2021-12-17 13:19:20 +08:00
parent 4ed33afc3f
commit f2d3a18f43
4 changed files with 119 additions and 162 deletions
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168
examples/peripherals/timer_group/main/timer_group_example_main.c
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@@ -9,131 +9,119 @@
#include "freertos/task.h"
#include "freertos/queue.h"
#include "driver/timer.h"
#include "esp_log.h"
#define TIMER_DIVIDER (16) // Hardware timer clock divider
#define TIMER_SCALE (TIMER_BASE_CLK / TIMER_DIVIDER) // convert counter value to seconds
#define TIMER_RESOLUTION_HZ 1000000 // 1MHz resolution
#define TIMER_ALARM_PERIOD_S 0.5 // Alarm period 0.5s
typedef struct {
int timer_group;
int timer_idx;
int alarm_interval;
bool auto_reload;
} example_timer_info_t;
static const char *TAG = "example";
/**
* @brief A sample structure to pass events from the timer ISR to task
*
*/
typedef struct {
example_timer_info_t info;
uint64_t timer_counter_value;
uint64_t timer_count_value;
} example_timer_event_t;
static xQueueHandle s_timer_queue;
/*
* A simple helper function to print the raw timer counter value
* and the counter value converted to seconds
/**
* @brief Timer user data, will be pass to timer alarm callback
*/
static void inline print_timer_counter(uint64_t counter_value)
{
printf("Counter: 0x%08x%08x\r\n", (uint32_t) (counter_value >> 32),
(uint32_t) (counter_value));
printf("Time : %.8f s\r\n", (double) counter_value / TIMER_SCALE);
}
typedef struct {
xQueueHandle user_queue;
int timer_group;
int timer_idx;
int alarm_value;
bool auto_reload;
} example_timer_user_data_t;
static bool IRAM_ATTR timer_group_isr_callback(void *args)
{
BaseType_t high_task_awoken = pdFALSE;
example_timer_info_t *info = (example_timer_info_t *) args;
uint64_t timer_counter_value = timer_group_get_counter_value_in_isr(info->timer_group, info->timer_idx);
/* Prepare basic event data that will be then sent back to task */
example_timer_user_data_t *user_data = (example_timer_user_data_t *) args;
// fetch current count value
uint64_t timer_count_value = timer_group_get_counter_value_in_isr(user_data->timer_group, user_data->timer_idx);
example_timer_event_t evt = {
.info.timer_group = info->timer_group,
.info.timer_idx = info->timer_idx,
.info.auto_reload = info->auto_reload,
.info.alarm_interval = info->alarm_interval,
.timer_counter_value = timer_counter_value
.timer_count_value = timer_count_value,
};
if (!info->auto_reload) {
timer_counter_value += info->alarm_interval * TIMER_SCALE;
timer_group_set_alarm_value_in_isr(info->timer_group, info->timer_idx, timer_counter_value);
// set new alarm value if necessary
if (!user_data->auto_reload) {
user_data->alarm_value += TIMER_ALARM_PERIOD_S * TIMER_RESOLUTION_HZ;
timer_group_set_alarm_value_in_isr(user_data->timer_group, user_data->timer_idx, user_data->alarm_value);
}
/* Now just send the event data back to the main program task */
xQueueSendFromISR(s_timer_queue, &evt, &high_task_awoken);
// Send the event data back to the main program task
xQueueSendFromISR(user_data->user_queue, &evt, &high_task_awoken);
return high_task_awoken == pdTRUE; // return whether we need to yield at the end of ISR
return high_task_awoken == pdTRUE; // return whether a task switch is needed
}
/**
* @brief Initialize selected timer of timer group
*
* @param group Timer Group number, index from 0
* @param timer timer ID, index from 0
* @param auto_reload whether auto-reload on alarm event
* @param timer_interval_sec interval of alarm
*/
static void example_tg_timer_init(int group, int timer, bool auto_reload, int timer_interval_sec)
static void example_tg_timer_init(example_timer_user_data_t *user_data)
{
/* Select and initialize basic parameters of the timer */
int group = user_data->timer_group;
int timer = user_data->timer_idx;
timer_config_t config = {
.divider = TIMER_DIVIDER,
.clk_src = TIMER_SRC_CLK_APB,
.divider = APB_CLK_FREQ / TIMER_RESOLUTION_HZ,
.counter_dir = TIMER_COUNT_UP,
.counter_en = TIMER_PAUSE,
.alarm_en = TIMER_ALARM_EN,
.auto_reload = auto_reload,
}; // default clock source is APB
timer_init(group, timer, &config);
.auto_reload = user_data->auto_reload,
};
ESP_ERROR_CHECK(timer_init(group, timer, &config));
/* Timer's counter will initially start from value below.
Also, if auto_reload is set, this value will be automatically reload on alarm */
timer_set_counter_value(group, timer, 0);
// For the timer counter to a initial value
ESP_ERROR_CHECK(timer_set_counter_value(group, timer, 0));
// Set alarm value and enable alarm interrupt
ESP_ERROR_CHECK(timer_set_alarm_value(group, timer, user_data->alarm_value));
ESP_ERROR_CHECK(timer_enable_intr(group, timer));
// Hook interrupt callback
ESP_ERROR_CHECK(timer_isr_callback_add(group, timer, timer_group_isr_callback, user_data, 0));
// Start timer
ESP_ERROR_CHECK(timer_start(group, timer));
}
/* Configure the alarm value and the interrupt on alarm. */
timer_set_alarm_value(group, timer, timer_interval_sec * TIMER_SCALE);
timer_enable_intr(group, timer);
example_timer_info_t *timer_info = calloc(1, sizeof(example_timer_info_t));
timer_info->timer_group = group;
timer_info->timer_idx = timer;
timer_info->auto_reload = auto_reload;
timer_info->alarm_interval = timer_interval_sec;
timer_isr_callback_add(group, timer, timer_group_isr_callback, timer_info, 0);
timer_start(group, timer);
static void example_tg_timer_deinit(int group, int timer)
{
ESP_ERROR_CHECK(timer_isr_callback_remove(group, timer));
ESP_ERROR_CHECK(timer_deinit(group, timer));
}
void app_main(void)
{
s_timer_queue = xQueueCreate(10, sizeof(example_timer_event_t));
example_timer_user_data_t *user_data = calloc(1, sizeof(example_timer_user_data_t));
assert(user_data);
user_data->user_queue = xQueueCreate(10, sizeof(example_timer_event_t));
assert(user_data->user_queue);
user_data->timer_group = 0;
user_data->timer_idx = 0;
user_data->alarm_value = TIMER_ALARM_PERIOD_S * TIMER_RESOLUTION_HZ;
example_tg_timer_init(TIMER_GROUP_0, TIMER_0, true, 3);
example_tg_timer_init(TIMER_GROUP_1, TIMER_0, false, 5);
while (1) {
example_timer_event_t evt;
xQueueReceive(s_timer_queue, &evt, portMAX_DELAY);
ESP_LOGI(TAG, "Init timer with auto-reload");
user_data->auto_reload = true;
example_tg_timer_init(user_data);
/* Print information that the timer reported an event */
if (evt.info.auto_reload) {
printf("Timer Group with auto reload\n");
} else {
printf("Timer Group without auto reload\n");
}
printf("Group[%d], timer[%d] alarm event\n", evt.info.timer_group, evt.info.timer_idx);
/* Print the timer values passed by event */
printf("------- EVENT TIME --------\n");
print_timer_counter(evt.timer_counter_value);
/* Print the timer values as visible by this task */
printf("-------- TASK TIME --------\n");
uint64_t task_counter_value;
timer_get_counter_value(evt.info.timer_group, evt.info.timer_idx, &task_counter_value);
print_timer_counter(task_counter_value);
example_timer_event_t evt;
uint32_t test_count = 4;
while (test_count--) {
xQueueReceive(user_data->user_queue, &evt, portMAX_DELAY);
ESP_LOGI(TAG, "Timer auto reloaded, count value in ISR: %llu", evt.timer_count_value);
}
example_tg_timer_deinit(user_data->timer_group, user_data->timer_idx);
ESP_LOGI(TAG, "Init timer without auto-reload");
user_data->auto_reload = false;
example_tg_timer_init(user_data);
test_count = 4;
while (test_count--) {
xQueueReceive(user_data->user_queue, &evt, portMAX_DELAY);
ESP_LOGI(TAG, "Timer alarmed at %llu", evt.timer_count_value);
}
example_tg_timer_deinit(user_data->timer_group, user_data->timer_idx);
vQueueDelete(user_data->user_queue);
free(user_data);
}