dma_id	spi_env_t
evt_handler	spi_env_t
handle	spi_env_t
is_soft_cs	spi_env_t
p_pin_cfg	spi_env_t
rx_done	spi_env_t
spi_dma_state	spi_env_t
spi_state	spi_env_t
start_flag	spi_env_t
tx_done	spi_env_t