哦！你的意思是第二种是用了SPI接口来控制的？那它怎么控制flash的7个引脚。flash.c的宏定义如下，麻烦你帮我解释下！多谢！
#ifdef SUPPORT_FLASH_BY_BUS
#ifdef SUPPORT_GPIO_BUS_FUNCTION
#define FLASH_CLE (1 << 1)
#define FLASH_ALE (1 << 2)
#define FLASH_WP (1 << 3)
#define FLASH_CLE_LOW (Bus1SetBit(FLASH_CLE, 0))
#define FLASH_CLE_HIGH (Bus1SetBit(FLASH_CLE, 1))
#define FLASH_ALE_LOW (Bus1SetBit(FLASH_ALE, 0))
#define FLASH_ALE_HIGH (Bus1SetBit(FLASH_ALE, 1))
#define FLASH_WP_LOW (Bus1SetBit(FLASH_WP, 0))
#define FLASH_WP_HIGH (Bus1SetBit(FLASH_WP, 1))
#define FLASH_CE 100
#define FLASH_WE 4
#define FLASH_RE 5
#define FLASH_RB 6
#define FLASH_CE_LOW (GPIO_O_SET(FLASH_CE, 0))
#define FLASH_CE_HIGH (GPIO_O_SET(FLASH_CE, 1))
#define FLASH_WE_LOW (GPIO_O_SET(FLASH_WE, 0))
#define FLASH_WE_HIGH (GPIO_O_SET(FLASH_WE, 1))
#define FLASH_RE_LOW (GPIO_O_SET(FLASH_RE, 0))
#define FLASH_RE_HIGH (GPIO_O_SET(FLASH_RE, 1))
#define FLASH_RB_READ (GPIO_I_GET(FLASH_RB))
#else
#define FLASH_CLE 16
#define FLASH_ALE 17
#define FLASH_WP 18
#define FLASH_CE 100
#ifdef IC_8202D
#define FLASH_WE 66
#define FLASH_RE 67
#define FLASH_RB 68
#else
#define FLASH_WE 0
#define FLASH_RE 1
#define FLASH_RB 2
#endif
#define FLASH_CLE_LOW (GPIO_O_SET(FLASH_CLE, 0))
#define FLASH_CLE_HIGH (GPIO_O_SET(FLASH_CLE, 1))
#define FLASH_ALE_LOW (GPIO_O_SET(FLASH_ALE, 0))
#define FLASH_ALE_HIGH (GPIO_O_SET(FLASH_ALE, 1))
#define FLASH_WP_LOW (GPIO_O_SET(FLASH_WP, 0))
#define FLASH_WP_HIGH (GPIO_O_SET(FLASH_WP, 1))
#define FLASH_CE_LOW (GPIO_O_SET(FLASH_CE, 0))
#define FLASH_CE_HIGH (GPIO_O_SET(FLASH_CE, 1))
#define FLASH_WE_LOW (GPIO_O_SET(FLASH_WE, 0))
#define FLASH_WE_HIGH (GPIO_O_SET(FLASH_WE, 1))
#define FLASH_RE_LOW (GPIO_O_SET(FLASH_RE, 0))
#define FLASH_RE_HIGH (GPIO_O_SET(FLASH_RE, 1))
#define FLASH_RB_READ (GPIO_I_GET(FLASH_RB))
#endif
#define CMD_RESET 0xFF
#define CMD_ERASE_1st 0x60
#define CMD_ERASE_2nd 0xD0
#define CMD_PROGRAM_1st 0x80
#define CMD_PROGRAM_2nd 0x10
#define CMD_READ_1_0 0x00
#define CMD_READ_1_1 0x01
#define CMD_READ_2 0x50
#define CMD_READ_3 0x30
#define CMD_READ_ID 0x90
#define CMD_READ_STATUS 0x70
#define FLASH_ID_SAMSUNG 0xEC
#define FLASH_ID_TOSHIBA 0x98
#define FLASH_ID_HYNIX 0xAD
#define FLASH_TYPE_32MB 0x01
#define FLASH_TYPE_64MB 0x02
#define FLASH_TYPE_128MB 0x03
#define FLASH_TYPE_256MB 0x04
#define FLASH_TYPE_512MB 0x05
#define FLASH_TYPE_1GB 0x06
#define FLASH_TABLE_ID1 0xCF
#define FLASH_TABLE_ID2 0x70
#define FLASH_TABLE_ID3 0x12
#else // Flash controlled by MCU
#define FLASH_CS 41
#define FLASH_SCK 42
#define FLASH_SI 12
#define FLASH_SO 13
#define FLASH_CS_LOW (GPIO_O_SET(FLASH_CS, 0))
#define FLASH_CS_HIGH (GPIO_O_SET(FLASH_CS, 1))
#define FLASH_SCK_LOW (GPIO_O_SET(FLASH_SCK, 0))
#define FLASH_SCK_HIGH (GPIO_O_SET(FLASH_SCK, 1))
#define FLASH_SO_LOW (GPIO_O_SET(FLASH_SO, 0))
#define FLASH_SO_HIGH (GPIO_O_SET(FLASH_SO, 1))
#define FLASH_SI_READ (GPIO_I_GET(FLASH_SI))
#define CMD_MEMORY_PAGE_BUF1 0xa1
#define CMD_MEMORY_ARRAY_READ 0xb2
#define CMD_MEMORY_ERASE_BUF 0xc3
#define CMD_STATUS_REG_READ 0x28
#define STATUS_NOT_BUSY 0x82
#endif |
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