aZholtikov/zh_tachometer
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aZholtikov committed 2026-09-12 12:31:39 +03:00
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README.md
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@@ -1,9 +1,5 @@
# ESP32 ESP-IDF component for tachometer (via rotary optical encoder)
## SAST Tools
[PVS-Studio](https://pvs-studio.com/pvs-studio/?utm_source=website&utm_medium=github&utm_campaign=open_source) - static analyzer for C, C++, C#, and Java code.
## Features
1. Quadrature encoder support via ESP-IDF PCNT peripheral in quadrature decoder mode.
zh_tachometer.c
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@@ -97,7 +97,7 @@ static esp_err_t _zh_tachometer_timer_init(zh_tachometer_handle_t *handle);
*/
static void _zh_tachometer_timer_on_alarm_cb(void *arg);
esp_err_t zh_tachometer_init(const zh_tachometer_init_config_t *config, zh_tachometer_handle_t **handle) // -V2008
esp_err_t zh_tachometer_init(const zh_tachometer_init_config_t *config, zh_tachometer_handle_t **handle)
{
ZH_LOGI("Tachometer initialization started.");
ZH_ERROR_CHECK(config != NULL && handle != NULL, ESP_ERR_INVALID_ARG, NULL, "Tachometer initialization failed. Invalid argument.");
@@ -115,7 +115,7 @@ esp_err_t zh_tachometer_init(const zh_tachometer_init_config_t *config, zh_tacho
return ESP_OK;
}
esp_err_t zh_tachometer_deinit(zh_tachometer_handle_t **handle) // -V2008
esp_err_t zh_tachometer_deinit(zh_tachometer_handle_t **handle)
{
ZH_LOGI("Tachometer deinitialization started.");
ZH_ERROR_CHECK(handle != NULL && *handle != NULL, ESP_ERR_INVALID_ARG, NULL, "Tachometer deinitialization failed. Invalid argument.");
@@ -149,7 +149,7 @@ static esp_err_t _zh_tachometer_validate_config(const zh_tachometer_init_config_
return ESP_OK;
}
static esp_err_t _zh_tachometer_pcnt_init(const zh_tachometer_init_config_t *config, zh_tachometer_handle_t *handle) // -V2008
static esp_err_t _zh_tachometer_pcnt_init(const zh_tachometer_init_config_t *config, zh_tachometer_handle_t *handle)
{
ZH_ERROR_CHECK(config->a_gpio_number < GPIO_NUM_MAX && config->b_gpio_number < GPIO_NUM_MAX, ESP_ERR_INVALID_ARG, NULL, "Invalid GPIO number.")
ZH_ERROR_CHECK(config->a_gpio_number != config->b_gpio_number, ESP_ERR_INVALID_ARG, NULL, "Encoder A and B GPIO is same.")
@@ -255,5 +255,5 @@ static void IRAM_ATTR _zh_tachometer_timer_on_alarm_cb(void *arg)
ZH_ERROR_CHECK_VOID(pcnt_unit_get_count(handle->pcnt_unit_handle, &pcnt_count) == ESP_OK, NULL, "PCNT internal error.");
ZH_ERROR_CHECK_VOID(pcnt_unit_clear_count(handle->pcnt_unit_handle) == ESP_OK, NULL, "PCNT internal error.");
float value_temp = ((pcnt_count * 100.0) / handle->encoder_pulses) * 60;
handle->value = (uint16_t)fabs(value_temp); // -V2004
handle->value = (uint16_t)fabs(value_temp);
}