Function esp_idf_svc::sys::esp_efuse_get_key_purpose

pub unsafe extern "C" fn esp_efuse_get_key_purpose(block: u32) -> u32

@brief Returns the current purpose set for an efuse key block.

@param[in] block A key block in the range EFUSE_BLK_KEY0..EFUSE_BLK_KEY_MAX

@return - Value: If Successful, it returns the value of the purpose related to the given key block. - ESP_EFUSE_KEY_PURPOSE_MAX: Otherwise.