FLOW_CONTROL_ENABLE_BIT
cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
val &= ~FLOW_CONTROL_ENABLE_BIT;
cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
val &= ~FLOW_CONTROL_ENABLE_BIT;
cm3_state = (val & FLOW_CONTROL_ENABLE_BIT);
val &= ~FLOW_CONTROL_ENABLE_BIT;
val |= FLOW_CONTROL_ENABLE_BIT;