MX25L128相关驱动

/* * COPYRIGHT (c) 2010 MACRONIX INTERNATIONAL CO., LTD * Flash Low Level Driver (LLD) Sample Code * * and PARELLEL interface command set * * $Id: MX25_CMD.c,v 1.6 2010/06/02 01:35:22 benhuang Exp $ */ #include "config.h" #include "MX25_CMD.h" #define PAGE_SIZE 256 #define SECTOR_SIZE 4096 #define PAGESOFSECTOR SECTOR_SIZE/PAGE_SIZE #define CE0 ((uint32)1<<7) //P0.7 #define CE1 ((uint32)1<<24) //P1.24 /********************************************************************************************************* ** Function name: Initialise ** ** Descriptions: Initialize the ** ** input parameters: 速率分频值 ** Returned value: 1 OK 0 NOT OK ** ** Used global variables: None ** Calling modules: None ** ** Created by: sdg ** Created Date: 2005/07/12 **------------------------------------------------------------------------------------------------------- ** Modified by: ** Modified date: **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ uint8 InitialiseSPI(uint8 Fdiv) { IODIR |= CE0; IO1DIR|= CE1; //0508 设置为输出 IOSET |= CE0; IO1SET|= CE1; //0508 输出为高 PINSEL0 =(PINSEL0 &0xFFFFC0FF) | 0x1500; SPI_SPCCR = Fdiv & 0xfe; /* 分频值 */ SPI_SPCR = 0x38; /* 主机、不允许中断 */ /* 高位在前、SCK高有效 */ /* 数据在SCK的第二个时钟沿采样 */ return(1); } /* * Function: CS_Low, CS_High * Arguments: None. * Description: Chip select go low / high. * Return Message: None. */ void CS_Low(uint8 cs) { /* if(cs == 0) IO0CLR |= CE0; else IO1CLR|= CE1; */ IO0CLR |= CE0; } void CS_High(uint8 cs) { /* if(cs == 0) IO0SET |= CE0; else IO1SET|= CE1; */ IO0SET |= CE0; } /********************************************************************************************************* ** Function name: SECTOR_SIZE ** ** Descriptions: 写一个字节 ** ** input parameters: 欲写的数据 ** Returned value: 1 OK 0 NOT OK ** ** Used global variables: None ** Calling modules: None ** ** Created by: sdg ** Created Date: 2005/07/12 **------------------------------------------------------------------------------------------------------- ** Modified by: ** Modified date: **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ static void spi_write(uint8 dat) { SPI_SPDR =dat; while(!(SPI_SPSR &0x80)); } /********************************************************************************************************* ** Function name: spi_write ** ** Descriptions: 读一个字节 ** ** input parameters: none ** Returned value: 读取的数据 ** ** Used global variables: None ** Calling modules: None ** ** Created by: sdg ** Created Date: 2005/07/12 **------------------------------------------------------------------------------------------------------- ** Modified by: ** Modified date: **------------------------------------------------------------------------------------------------------ ********************************************************************************************************/ static uint8 spi_read(void) { SPI_SPDR =0; while(!(SPI_SPSR &0x80)); return(SPI_SPDR); } /* --Common functions */ void InsertDummyCycle( uint8 dummy_cycle ) { uint8 i; for(i = 0; i < dummy_cycle;i++); } /* * Function: WaitFlashReady * Arguments: ExpectTime, expected time-out value of flash operations. * No use at non-synchronous IO mode. * fsptr, pointer of flash status structure * No use at non-synchronous IO mode. * Description: Synchronous IO: * If flash is ready return TRUE. * If flash is time-out return FALSE. * Non-synchronous IO: * Always return TRUE * Return Message: TRUE, FALSE */ BOOL WaitFlashReady( uint32 ExpectTime, FlashStatus *fsptr ) { #ifndef NON_SYNCHRONOUS_IO uint32 temp = 0; while( IsFlashBusy( fsptr ) ) { if( temp > ExpectTime ) { return FALSE; } temp = temp + 1; } return TRUE; #else return TRUE; #endif } /* * Function: WaitRYBYReady * Arguments: ExpectTime, expected time-out value of flash operations. * No use at non-synchronous IO mode. * Description: Synchronous IO: * If flash is ready return TRUE. * If flash is time-out return FALSE. * Non-synchronous IO: * Always return TRUE * Return Message: TRUE, FALSE */ BOOL WaitRYBYReady( uint32 ExpectTime ) { #ifndef NON_SYNCHRONOUS_IO uint32 temp = 0; if( temp > ExpectTime ) { return FALSE; } temp = temp + 1; return TRUE; #else return TRUE; #endif } /* * Function: IsFlashBusy * Arguments: fsptr, pointer of flash status structure * Description: Check status register WIP bit. * If WIP bit = 1: return TRUE ( Busy ) * = 0: return FALSE ( Ready ). * Return Message: TRUE, FALSE */ BOOL IsFlashBusy( FlashStatus *fsptr ) { uint8 gDataBuffer; CMD_RDSR( &gDataBuffer, fsptr ); if( (gDataBuffer & FLASH_WIP_MASK) == FLASH_WIP_MASK ) return TRUE; else return FALSE; } /* * Function: IsFlashPAR * Arguments: fsptr, pointer of flash status structure * Description: Return flash current state: or PARALLEL * Return Message: PAR enable or not ( TRUE / FALSE ) */ BOOL IsFlashPAR( FlashStatus *fsptr ) { if( (fsptr->ModeReg&0x02) == 0x02 ) return TRUE; else return FALSE; } /* * Function: IsFlashQIO * Arguments: fsptr, pointer of flash status structure * Description: If flash QE bit = 1: return TRUE * = 0: return FALSE. * Return Message: TRUE, FALSE */ BOOL IsFlashQIO( FlashStatus *fsptr ) { uint8 gDataBuffer; CMD_RDSR( &gDataBuffer, fsptr ); if( (gDataBuffer & FLASH_QE_MASK) == FLASH_QE_MASK ) return TRUE; else return FALSE; } /* * Function: IsFlash4Byte * Arguments: None * Description: Check flash address is 3-byte or 4-byte. * If flash 4BYTE bit = 1: return TRUE * = 0: return FALSE. * Return Message: TRUE, FALSE */ BOOL IsFlash4Byte( void ) { uint8 gDataBuffer; CMD_RDSCUR( &gDataBuffer ); if( (gDataBuffer & FLASH_4BYTE_MASK) == FLASH_4BYTE_MASK ) return TRUE; else return FALSE; } /* * Function: SendFlashAddr * Arguments: flash_address, 32 bit flash memory address * addr_4byte_mode, * Description: Send flash address with 3-byte or 4-byte mode. * Return Message: None */ void SendFlashAddr( uint32 flash_address, BOOL addr_4byte_mode ) { /* Check flash is 3-byte or 4-byte mode. 4-byte mode: Send 4-byte address (A31-A0) 3-byte mode: Send 3-byte address (A23-A0) */ if( addr_4byte_mode == TRUE ){ spi_write( (flash_address >> 24) ); // A31-A24 } /* A23-A0 */ spi_write( (flash_address >> 16) ); spi_write( (flash_address >> 8) ); spi_write( (flash_address) ); } /* * Function: CMD_RDID * Arguments: Identification, 32 bit buffer to store id * fsptr, pointer of flash status structure * Description: The RDID instruction is to read the manufacturer ID * of 1-byte and followed by Device I