📄 nf_drv.lst
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550 4 nBlockAddr = ((nBlockAddr>>14)+1) << 14;
551 4 }
552 3 else
553 3 {
554 4 Test_nf_read_open_A_area(pos>>9, 0x00);
555 4 }
556 3 nPageAddr = ((nPageAddr>>9)+1) << 9;
557 3 Nf_wait_busy();
558 3 }
559 2 }
560 1 return OK;
561 1 }
562
563
564 data Uint32 nopenPage;
565 //函数假定一次读操作内不会跨过两页
566 /*bit nf_read_tobuf2(Uint32 pos, Byte* pbuf, Uint8 nlen)
567 {
568 static bit bInitFlag = 0;
569 data Uint32 nPageAddr;
570 data Byte i;
571 nPageAddr = pos>>9;
572 Nf_wait_busy();
573 if (0 == bInitFlag)
574 {
575 bInitFlag = 1;
576 nopenPage = nPageAddr;
577 i = (Byte)pos;
578 Test_nf_read_open_A_area(nPageAddr, i);
579 Nf_wait_busy();
580 for (i=0; i<nlen; i++)
581 pbuf[i] = D12_Y3;
582 }
583 else
584 {
585 if (nopenPage == nPageAddr)
586 {
587 //不需要重新打开页
588 for (i=0; i<nlen; i++)
589 pbuf[i] = D12_Y3;
590 }
591 else
592 {
593 nopenPage = nPageAddr;
594 i = (Byte)pos;
595 Test_nf_read_open_A_area(nPageAddr, i);
596 Nf_wait_busy();
597 for (i=0; i<nlen; i++)
598 pbuf[i] = D12_Y3;
599 }
600 }
601 return OK;
602 }*/
603
604 //函数支持一次读两页
605 bit nf_read_tobuf3(Uint32 pos, Byte* pbuf, Uint8 nlen)
606 {
607 1 static bit bInit = 0;
608 1 data Uint32 nPageAddr, nNextPage, nCurAddr;
609 1 data Byte i;
610 1 nPageAddr = pos>>9;
611 1 nCurAddr = pos;
C51 COMPILER V8.02 NF_DRV 09/25/2008 19:29:37 PAGE 11
612 1 Nf_wait_busy();
613 1 if (0 == bInit)
614 1 {
615 2 bInit = 1;
616 2 nopenPage = nPageAddr;
617 2 i = (Byte)pos;
618 2 Test_nf_read_open_A_area(nPageAddr, i);
619 2 Nf_wait_busy();
620 2 nPageAddr++;
621 2 nNextPage = nPageAddr<<9;
622 2 for (i=0; i<nlen; i++)
623 2 {
624 3 pbuf[i] = D12_Y3;
625 3 nCurAddr++;
626 3 if (nCurAddr >= nNextPage)
627 3 {
628 4 Test_nf_read_open_A_area(nPageAddr, 0);
629 4 nopenPage = nPageAddr;
630 4 nNextPage += 512;
631 4 }
632 3 }
633 2 }
634 1 else
635 1 {
636 2 if (nopenPage == nPageAddr)
637 2 {
638 3 nPageAddr++;
639 3 nNextPage = nPageAddr<<9;
640 3 //不需要重新打开页
641 3 for (i=0; i<nlen; i++)
642 3 {
643 4 pbuf[i] = D12_Y3;
644 4 nCurAddr++;
645 4 if (nCurAddr >= nNextPage)
646 4 {
647 5 Test_nf_read_open_A_area(nPageAddr, 0);
648 5 nopenPage = nPageAddr;
649 5 nNextPage += 512;
650 5 }
651 4 }
652 3 }
653 2 else
654 2 {
655 3 nopenPage = nPageAddr;
656 3 i = (Byte)pos;
657 3 //Test_nf_read_open_A_area(nPageAddr, i);old
658 3 /**原有程序存在一定的bug,但是不会有影响**/
659 3 if (0 == (pos & 0x00000100))
660 3 {
661 4 Test_nf_read_open_A_area(nPageAddr, i);
662 4
663 4 }
664 3 else
665 3 {
666 4 Test_nf_read_open_B_area(nPageAddr, i);
667 4 }
668 3 /***结束，原有的最多只会影响256个字节***/
669 3 Nf_wait_busy();
670 3 nPageAddr++;
671 3 nNextPage = nPageAddr<<9;
672 3 for (i=0; i<nlen; i++)
673 3 {
C51 COMPILER V8.02 NF_DRV 09/25/2008 19:29:37 PAGE 12
674 4 pbuf[i] = D12_Y3;
675 4 nCurAddr++;
676 4 if (nCurAddr >= nNextPage)
677 4 {
678 5 Test_nf_read_open_A_area(nPageAddr, 0);
679 5 nopenPage = nPageAddr;
680 5 nNextPage += 512;
681 5 }
682 4 }
683 3 }
684 2 }
685 1 return OK;
686 1 }
687
688
689 /*F**************************************************************************
690 * NAME: nf_init
691 *----------------------------------------------------------------------------
692 * PARAMS:
693 *
694 * return:
695 * OK : init complete
696 * KO : - NF not supported or not recognise
697 *----------------------------------------------------------------------------
698 * PURPOSE:
699 * NF initialisation
700 *----------------------------------------------------------------------------
701 * EXAMPLE:
702 *----------------------------------------------------------------------------
703 * NOTE:
704 *----------------------------------------------------------------------------
705 * REQUIREMENTS:
706 *****************************************************************************/
707 bit nf_init (void)
708 {
709 1 Uint8 volatile test;
710 1 D17CS = 0xff;
711 1 D17CS &= 0x7f;
712 1 D12_Y0 = D17CS;
713 1 xCurErasedBlock = 0;
714 1 xEraseStatus = FALSE;
715 1 halfpage = 0;
716 1
717 1 nf_wp_on();
718 1 Test_nf_send_command(NF_RESET_CMD);
719 1
720 1
721 1
722 1 #if (NF_CAPACITY_AUTO_DETECT == TRUE) /* Auto Detect the type of nand-flash */
723 1 //test here
724 1 test = 0;
725 1
726 1 Test_nf_send_command(NF_READ_ID_CMD);
727 1
728 1
729 1 Test_nf_send_address(0x00);
730 1
731 1
732 1 Nf_wait_busy();
733 1 delay();
734 1 test = D12_Y3;
735 1 test = D12_Y3; /* Maker code */
C51 COMPILER V8.02 NF_DRV 09/25/2008 19:29:37 PAGE 13
736 1 switch (test) /* Device code */
737 1 {
738 2 /***************************************************************************/
739 2 case 0x73 : /*------- 16 Mbyte --------*/
740 2 nf_device_type = NF_SIZE_16MB;
741 2 nf_zone_max = 1; /* 1 zone : 1024 blocks */
742 2 nf_4_cycle_address = 0; /* 3 address cycles */
743 2 break;
744 2 /***************************************************************************/
745 2 case 0x75 : /*------- 32 Mbyte --------*/
746 2 nf_device_type = NF_SIZE_32MB;
747 2 nf_zone_max = 2; /* 2 zones : 2048 blocks */
748 2 nf_4_cycle_address = 0; /* 3 address cycles */
749 2 break;
750 2 /***************************************************************************/
751 2 case 0x76 : /*------- 64 Mbyte --------*/
752 2 nf_device_type = NF_SIZE_64MB;
753 2 nf_zone_max = 4; /* 4 zones : 4096 blocks */
754 2 nf_4_cycle_address = 1; /* 4 address cycles */
755 2 break;
756 2 /***************************************************************************/
757 2 case 0x79 : /*------ 128 Mbyte --------*/
758 2 nf_device_type = NF_SIZE_128MB;
759 2 nf_zone_max = 8; /* 8 zones : 8192 blocks */
760 2 nf_4_cycle_address = 1; /* 4 address cycles */
761 2 break;
762 2 default:
763 2 return KO;
764 2 }
765 1 #endif
766 1 nf_check_status();
767 1
768 1 // nf_testchip();
769 1 return OK;
770 1 }
771
772 bit nf_testchip()
773 {
774 1 Uint16 nBlockNum;
775 1 Uint16 i;
776 1 Uint32 nTestBlock;
777 1 Uint8 nValidFlag;
778 1 switch (nf_device_type)
779 1 {
780 2 case NF_SIZE_32MB:
781 2 nBlockNum = 2048;
782 2 break;
783 2 case NF_SIZE_16MB:
784 2 nBlockNum = 1024;
785 2 break;
786 2 }
787 1
788 1 nTestBlock = 0;
789 1 for (i=0; i<nBlockNum; i++)
790 1 {
791 2 Test_nf_read_open_C_area(nTestBlock, 0x05);
792 2 nValidFlag = D12_Y3;
793 2 // Test_nf_rd_byte(nValidFlag);
794 2 if (0xff != nValidFlag)
795 2 {
796 3 return KO;
797 3 }
C51 COMPILER V8.02 NF_DRV 09/25/2008 19:29:37 PAGE 14
798 2 else
799 2 {
800 3 nValidFlag = 0;
801 3 }
802 2 }
803 1
804 1 return OK;
805 1 }
806
807 void delay()
808 {
809 1 idata unsigned int temp;
810 1 for (temp=0; temp<3000;temp++)
811 1 {
812 2 temp += 1;
813 2 temp -= 1;
814 2 }
815 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 2753 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = 7 106
PDATA SIZE = ---- ----
DATA SIZE = 4 21
IDATA SIZE = ---- 2
BIT SIZE = 3 ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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