Function esp_idf_hal::sys::uart_set_tx_empty_threshold

pub unsafe extern "C" fn uart_set_tx_empty_threshold(
    uart_num: i32,
    threshold: i32,
) -> i32

@brief Set uart threshold values for TX fifo empty

@param uart_num UART_NUM_0, UART_NUM_1 or UART_NUM_2 @param threshold Threshold value below which TX fifo empty interrupt is generated

@return - ESP_OK Success - ESP_ERR_INVALID_ARG Parameter error - ESP_ERR_INVALID_STATE Driver is not installed