51读写nandflash例程.doc

51读写nandflash例程下面是CYPRESS 68013上的一个读写samsung K9F1G的例子程序， M gPOY  ?0E|Z;p ?说明:程序针对mcu:cypress 68013,flash:samsung k9f1g08u,MCU运行于48M,对于其它频率,一些时序常数可能需要修改.程序实现了FLASH的CLEAR,WRITE,READ基本操作. ;8`CcOU ?/******************************************************************/
;? R Xod ?/*AC Timing Characteristics define for Command / Address / Data Input QadNRv ?/*for cpu frequency 48MHZ, Xg#7S+P ?/******************************************************************/ @e1G%;$a ?#define TDS 130 ^7Z1{oQO!_ ?#define TDH 125 kqR
0PIG ?#define TWHR 300 KEVN~( [| ?/******************************************************************/ Ea vzvZ ?stT`!YJ ?//IO PORT MAP c P8aSk ?D tZw c;7P ?#define POW_LED ? PD1  L\b)[i( ?#define RUN_LED ? PD2 0}6I.4@ ?2{{+|k/- ?//flash control line map +;]%Ph$i#define SIG_CEn ? PA4 ? ? ? ? //o svKH%q ?#define SIG_WEn ? PA1 ? ? ? //o bkpp ktg2} ?#define SIG_REn ? PA5 ? ? ? //o /. WPRo#hM ?#define SIG_CLEp ? PA3 ? ? ? //o kR ,k:1Ze ?#define SIG_ALEp ? PA2 ? ? ? //o CR}!NR%:$ ?#define SIG_RB ? PA6 ? ? ? ? //i ThI`^LcAR4 ?#define SIG_WP ? PA0 ? ? ? ? //o LnlUa[5 ?#define SIG_DATA ? IOB ? ? ? //data bus /@mjP#O{g ?#define SIG_DATA_DIR ? OEB L 1G/eR`[ ?#define SIG_CON_DIR ? ? OEA =Dh1D+j! ?#define SIG_LED_DIR ? ? OED 8%GFlA ?#define init_con_io() {SIG_CON_DIR=0xbf;SIG_WP=0x1;SIG_LED_DIR=0XFF;} %i6F ch$j ?{4.cQm{ ?/*some macro define 6/y^X*6+7 ?f#6_O#define LATCH_DATA(LATCH,dataa) {if(LATCH){SIG_DATA_DIR=0xff;SIG_DATA=dataa;}\ +oktR 8g, ?? ? ? else {SIG_DATA_DIR=0x00;dataa=SIG_DATA;}} gXx~G,r ?#define SIG_INVALIDATE() ? {SIG_CEn=SIG_WEn=SIG_REn=HIGH;\ 0gdnrdlP ?? ? SIG_CLEp=SIG_ALEp=LOW; } oR-8LIS1 ?#define SIGNAL_SETUP(x) {unsigned char i;for(i=x;i0;i--)_nop_( );} *uNQAZ RYm ?#define SIGNAL_HOLD(x) {unsigned char i;for(i=x;i0;i--)_nop_( );} *
5\5B5u6 ?4 CqGX ?/******************************************************************/ =C{E0X2 ?/*function: a Command Latch C