EDMA_IRQ_MODRT_TX_TIMER_SHIFT
reg = reg >> EDMA_IRQ_MODRT_TX_TIMER_SHIFT;
reg &= ~(EDMA_IRQ_MODRT_TIMER_MASK << EDMA_IRQ_MODRT_TX_TIMER_SHIFT);
<< EDMA_IRQ_MODRT_TX_TIMER_SHIFT;
reg = (EDMA_TX_IMT << EDMA_IRQ_MODRT_TX_TIMER_SHIFT);