PRU_CTRL_CTRL
pru_control_read_reg(pru, PRU_CTRL_CTRL));
pru_is_running = pru_control_read_reg(pru, PRU_CTRL_CTRL) &
reg_val = pru_control_read_reg(pru, PRU_CTRL_CTRL);
pru_control_write_reg(pru, PRU_CTRL_CTRL, reg_val);
pru_control_write_reg(pru, PRU_CTRL_CTRL, val);
val = pru_control_read_reg(pru, PRU_CTRL_CTRL);
pru_control_write_reg(pru, PRU_CTRL_CTRL, val);