dma_h2c.sh

. ./dma_param.sh

#--------------------- Start S2MM channel (H2C) ---------------------#
echo "Setting current descriptor address (CURDESC) ..."

reg_write $S2MM_CURDESC $((DMA_DESC0 + XDMA_BIAS))

echo "Starting channel (DMACR.RS=1) ..."

s2mm_dmacr_dec=$(reg_read $S2MM_DMACR)

reg_write $S2MM_DMACR $((s2mm_dmacr_dec | RS_MASK))

echo "Setting tail descriptor address (TAILDESC) and trigger the transfer..."

reg_write $S2MM_TAILDESC $((DMA_DESC1 + XDMA_BIAS))

echo "Polling S2MM (H2C) status..."

while true; do
    s2mm_dmasr_dec=$(reg_read $S2MM_DMASR)
    check_dma_error $s2mm_dmasr_dec
    if [ $((s2mm_dmasr_dec & HALTED_MASK)) -ne 0 ]; then
        echo "\033[31m[Error] S2MMchannel has been halted.\033[0m"
        exit 1
    fi
    if [ $((s2mm_dmasr_dec & IDLE_MASK)) -ne 0 ]; then
        break
    fi
    sleep 0.01
done

echo "S2MM (H2C) transfer completed."