perf: updated error checks

README.md

@@ -10,15 +10,6 @@
 6. Watch points at ±32767 for overflow detection.
 7. Multiple tachometers supported — each requires its own PCNT unit and timer.
 
-## Note
-
-Enable the following settings in menuconfig:
-
-```text
-PCNT_CTRL_FUNC_IN_IRAM
-PCNT_ISR_IRAM_SAF
-```
-
 ## Using
 
 In an existing project, run the following command to install the components:
@@ -39,32 +30,22 @@ In the application, add the component:
 ```c
 #include "zh_tachometer.h"
 
-static zh_tachometer_handle_t *tachometer_handle = NULL;
+zh_tachometer_handle_t *tachometer_handle = NULL;
 
 void app_main(void)
 {
     esp_log_level_set("zh_tachometer", ESP_LOG_ERROR);
-
     zh_tachometer_init_config_t config = ZH_TACHOMETER_INIT_CONFIG_DEFAULT();
     config.a_gpio_number = GPIO_NUM_26;
     config.b_gpio_number = GPIO_NUM_27;
     config.encoder_pulses = 3600;
-
-    esp_err_t ret = zh_tachometer_init(&config, &tachometer_handle);
-    if (ret != ESP_OK) {
-        ESP_LOG_ERROR("zh_tachometer", "Initialization failed: %s", esp_err_to_name(ret));
-        return;
-    }
-
-    for (;;) {
-        uint16_t rpm = 0;
-        ret = zh_tachometer_get(&tachometer_handle, &rpm);
-        if (ret == ESP_OK) {
-            printf("Tachometer value is %d rpm.\n", rpm);
-        }
+    zh_tachometer_init(&config, &tachometer_handle);
+    for (;;)
+    {
+        uint16_t value = 0;
+        zh_tachometer_get(&tachometer_handle, &value);
+        printf("Tachometer value is %d rpm.\n", value);
         vTaskDelay(100 / portTICK_PERIOD_MS);
     }
-
-    zh_tachometer_deinit(&tachometer_handle);
 }
 ```