Constant esp_idf_sys::soc_periph_i2s_clk_src_t_I2S_CLK_SRC_EXTERNAL

pub const soc_periph_i2s_clk_src_t_I2S_CLK_SRC_EXTERNAL: soc_periph_i2s_clk_src_t = -1;

< Select external clock as source clock