nand.PageWrite

#include <file_config.h>

U32 PageWrite  (
    U32           row,         /* Page address           */
    U8*           buf,         /* Pointer to data buffer */
    NAND_DRV_CFG* cfg);        /* Device configuration   */

The function PageWrite writes data to a NAND Flash device. The parameter row specifies the starting page to where to write the data. The parameter buf is a pointer to the buffer containing the data. The parameter cfg is a pointer specifying the device configuration, which also contains default data positions as described in Page Layout Structure.

The function is part of the NAND Driver. The prototype is defined in the file File_Config.h. Developers must customize the function.

• RTV_NOERR
• ERR_NAND_PROG - on failure.
• ERR_NAND_HW_TOUT - Hardware data transfer timeout.

nand.BlockErase, nand.Init, nand.PageRead, nand.UnInit

/* NAND Device Driver Control Block */
NAND_DRV nand0_drv = {
  Init,
  UnInit,
  PageRead,
  PageWrite,
  BlockErase
};

static U32 PageWrite (U32 row, U8 *buf, NAND_DRV_CFG *cfg) {
  U32 i, sec;

  U32 *p = (U32 *)buf;

  if (!StatusFlag (NAND_CON_READY)) {       /* Wait for controller ready    */
    return ERR_NAND_HW_TOUT;
  }

  MLC_CMD = NAND_CMD_PROG1ST;               /* Programm command 1           */
  SetAddr (row << 8, cfg->AddrCycles);      /* Set address                  */

  for (sec = 0; sec < cfg->SectorsPerPage; sec++) {
    MLC_ECC_ENC_REG = 0;                    /* Start Encode Cycle           */
    for (i = 0; i < (528 >> 2); i++)        /* Write main + spare area      */
      MLC_BUFFX(i) = *p++;
    MLC_ECC_AUTO_ENC_REG = 0;               /* Auto encode                  */
    if (!StatusFlag (NAND_CON_READY)) {     /* Wait for controller ready    */
      return ERR_NAND_HW_TOUT;
    }
  }
  MLC_CMD = NAND_CMD_PROG2ND;               /* Programm command 2           */

  if (!StatusFlag (NAND_CON_READY)) {       /* Wait for controller ready    */
    return ERR_NAND_HW_TOUT;
  }
  if (!StatusFlag (NAND_CHIP_BUSY)) {       /* Wait while NAND busy         */
    return ERR_NAND_HW_TOUT;
  }

  MLC_CMD = NAND_CMD_STATUS;                /* Send status command          */
  if ((U8)MLC_DATAX(0) & NAND_STAT_FAIL) {
    return ERR_NAND_PROG;                   /* Programming failed           */
  }
  return RTV_NOERR;
}