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bugfix: hc-sr04 example: init queue before setup ISR

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Closes https://github.com/espressif/esp-idf/issues/7419
This commit is contained in:
SalimTerryLi 2021-08-25 15:59:51 +08:00
parent 4740e3e017
commit 6c272d6515
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GPG Key ID: F05CCEF2191AF770
1 changed files with 7 additions and 6 deletions
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13
examples/peripherals/mcpwm/mcpwm_capture_hc_sr04/main/mcpwm_capture_hc_sr04.c
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@ -79,6 +79,13 @@ static bool sr04_echo_isr_handler(mcpwm_unit_t mcpwm, mcpwm_capture_channel_id_t
void app_main(void) {
ESP_LOGI(TAG, "HC-SR04 example based on capture function from MCPWM");
// the queue where we read data
cap_queue = xQueueCreate(1, sizeof(uint32_t));
if (cap_queue == NULL) {
ESP_LOGE(TAG, "failed to alloc cap_queue");
return;
}
/* configure Echo pin */
// set CAP_0 on GPIO
ESP_ERROR_CHECK(mcpwm_gpio_init(MCPWM_UNIT_0, MCPWM_CAP_0, HC_SR04_PIN_ECHO));
@ -106,12 +113,6 @@ void app_main(void) {
ESP_ERROR_CHECK(gpio_set_level(HC_SR04_PIN_TRIG, 0)); // drive low by default
ESP_LOGI(TAG, "Trig pin configured");
// the queue where we read data
cap_queue = xQueueCreate(1, sizeof(uint32_t));
if (cap_queue == 0) {
ESP_LOGE(TAG, "failed to alloc cap_queue");
}
// start generating trig signal
xTaskCreate(gen_trig_output, "gen_trig_output", TRIGGER_THREAD_STACK_SIZE, NULL, TRIGGER_THREAD_PRIORITY, NULL);
ESP_LOGI(TAG, "trig task started");