218 lines
6.9 KiB
C
218 lines
6.9 KiB
C
#include "McuW25Q64JvssiqDrv.h"
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/* 关于flash操作的主体寄存器地址 */
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#define DEVICE_ID_CMD 0x90 // 设备ID
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#define WRITE_ENBALE_CMD 0x06 // 写使能
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#define WRITE_DISABLE_CMD 0x04 // 写失能
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#define PAGE_PROGRAM_CMD 0x02 // 数据写入
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#define DEVICE_ID_CMD 0x90 // 设备ID
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#define READ_DATA_CMD 0x03 // 读取数据
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#define READ_STA1_CMD 0x05 // 读寄存器状态1
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//#define READ_STA2_CMD 0x35 // 读寄存器状态2,该状态寄存器暂时不使用
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#define SECTOR_ERASE_CMD 0x20 // 4KB擦除
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//#define BLOCK_ERASE_32_CMD 0x52 // 32KB擦除
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#define BLOCK_ERASE_64_CMD 0xD8 // 64KB擦除
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#define CHIP_ERASE_CMD 0xC7 // 整片擦除
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#define POWERDOWN_CMD 0xB9 // 低功耗
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#define WAKEUP_CMD 0xAB // 唤醒
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#define FLASH_CS_HIGH 1
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#define FLASH_CS_LOW 0
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static void W25Q64_WriteEnable(W25Q64JVSSIQ_OBJ * FlashObj);
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static unsigned short W25Q64_ReadId(W25Q64JVSSIQ_OBJ * FlashObj);
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//static void W25Q64_WriteDisable(W25Q64JVSSIQ_OBJ * FlashObj);
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static unsigned char W25Q64_ReadStaReg(W25Q64JVSSIQ_OBJ * FlashObj);
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static void W25Q64_WaitNoBusy(W25Q64JVSSIQ_OBJ * FlashObj);
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/* 初始化FLASH */
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int W25Q64_Init(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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if (0xef16 != W25Q64_ReadId(FlashObj)) { //华邦电子的代号0xef，W25Q64的ID代号0x16
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return -1;
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}
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return 0;
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}
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/* 读取Flash上的部分数据 */
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int W25Q64_ReadBytes(W25Q64JVSSIQ_OBJ * FlashObj, unsigned int Raddr, unsigned char *Rbuf, unsigned int RbufLen)
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{
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int i = 0;
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unsigned char AddrBuf[3] = {0};
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if ((Rbuf == NULL) && ((W25Q64_FLASH_SIZE - Raddr) < RbufLen)) {
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return -1;
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}
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AddrBuf[0] = (Raddr & 0x00ff0000) >> 16;
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AddrBuf[1] = (Raddr & 0x0000ff00) >> 8;
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AddrBuf[2] = Raddr & 0x000000ff;
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W25Q64_WaitNoBusy(FlashObj);
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(READ_DATA_CMD);
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FlashObj->SpiWriteReadByte(AddrBuf[0]);
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FlashObj->SpiWriteReadByte(AddrBuf[1]);
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FlashObj->SpiWriteReadByte(AddrBuf[2]);
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for (i = 0; i < RbufLen; i++) {
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Rbuf[i] = FlashObj->SpiWriteReadByte(0xff);
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}
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FlashObj->SpiCs(FLASH_CS_HIGH);
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return 0;
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}
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int W25Q64_WriteBytes(W25Q64JVSSIQ_OBJ * FlashObj, unsigned int Waddr, unsigned char *Wbuf, unsigned int WbufLen)
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{
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int i;
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unsigned char AddrBuf[3] = {0};
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if ((Wbuf == NULL) && ((W25Q64_FLASH_SIZE - Waddr) < WbufLen)) {
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return -1;
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}
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for (i = 0; i < WbufLen; i++) {
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if ((Waddr + i) % 4096 == 0) {
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W25Q64_EraseSector(FlashObj, (Waddr + i) / 4096);
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}
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if ((i == 0) || (((Waddr + i) % 256) == 0)) {
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AddrBuf[0] = ((Waddr + i) & 0x00ff0000) >> 16;
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AddrBuf[1] = ((Waddr + i) & 0x0000ff00) >> 8;
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AddrBuf[2] = (Waddr + i) & 0x000000ff;
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W25Q64_WriteEnable(FlashObj);
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W25Q64_WaitNoBusy(FlashObj);
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(PAGE_PROGRAM_CMD);
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FlashObj->SpiWriteReadByte(AddrBuf[0]);
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FlashObj->SpiWriteReadByte(AddrBuf[1]);
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FlashObj->SpiWriteReadByte(AddrBuf[2]);
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}
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FlashObj->SpiWriteReadByte(Wbuf[i]);
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if ((((Waddr + i) % 256) == 255) || (i == (WbufLen - 1))) {
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FlashObj->SpiCs(FLASH_CS_HIGH);
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W25Q64_WaitNoBusy(FlashObj);
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}
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}
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return 0;
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}
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/* 清除块数据 */
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int W25Q64_EraseBlock(W25Q64JVSSIQ_OBJ * FlashObj, unsigned int BlockAddr)
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{
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unsigned char AddrBuf[3] = {0};
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if (BlockAddr >= W25Q64_FLASH_BLOCK_NUM) {
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return -1;
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}
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BlockAddr *= 65536;
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AddrBuf[0] = (BlockAddr & 0x00ff0000) >> 16;
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AddrBuf[1] = (BlockAddr & 0x0000ff00) >> 8;
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AddrBuf[2] = BlockAddr & 0x000000ff;
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W25Q64_WriteEnable(FlashObj);
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W25Q64_WaitNoBusy(FlashObj);
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(BLOCK_ERASE_64_CMD);
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FlashObj->SpiWriteReadByte(AddrBuf[0]);
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FlashObj->SpiWriteReadByte(AddrBuf[1]);
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FlashObj->SpiWriteReadByte(AddrBuf[2]);
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FlashObj->SpiCs(FLASH_CS_HIGH);
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W25Q64_WaitNoBusy(FlashObj);
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return 0;
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}
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/* 清除扇区数据 */
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int W25Q64_EraseSector(W25Q64JVSSIQ_OBJ * FlashObj, unsigned int SectorAddr)
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{
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unsigned char AddrBuf[3] = {0};
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if (SectorAddr >= W25Q64_FLASH_SECTOR_NUM) {
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return -1;
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}
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SectorAddr *= 4096;
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AddrBuf[0] = (SectorAddr & 0x00ff0000) >> 16;
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AddrBuf[1] = (SectorAddr & 0x0000ff00) >> 8;
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AddrBuf[2] = SectorAddr & 0x000000ff;
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W25Q64_WriteEnable(FlashObj);
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W25Q64_WaitNoBusy(FlashObj);
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(SECTOR_ERASE_CMD);
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FlashObj->SpiWriteReadByte(AddrBuf[0]);
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FlashObj->SpiWriteReadByte(AddrBuf[1]);
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FlashObj->SpiWriteReadByte(AddrBuf[2]);
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FlashObj->SpiCs(FLASH_CS_HIGH);
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W25Q64_WaitNoBusy(FlashObj);
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return 0;
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}
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/* 清除FLASH数据 */
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void W25Q64_EraseChip(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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W25Q64_WriteEnable(FlashObj);
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W25Q64_WaitNoBusy(FlashObj);
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(CHIP_ERASE_CMD);
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FlashObj->SpiCs(FLASH_CS_HIGH);
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W25Q64_WaitNoBusy(FlashObj);
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}
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/* 进入低功耗 */
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void W25Q64_PowerDown(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(POWERDOWN_CMD);
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FlashObj->SpiCs(FLASH_CS_HIGH);
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FlashObj->DelayUs(3);
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}
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/* 唤醒 */
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void W25Q64_WakeUp(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(WAKEUP_CMD);
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FlashObj->SpiCs(FLASH_CS_HIGH);
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FlashObj->DelayUs(3);
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}
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/* FLASH读取Flash内部的ID */
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static unsigned short W25Q64_ReadId(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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unsigned short DeviceID;
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(DEVICE_ID_CMD);
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FlashObj->SpiWriteReadByte(0);
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FlashObj->SpiWriteReadByte(0);
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FlashObj->SpiWriteReadByte(0);
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DeviceID = FlashObj->SpiWriteReadByte(0xff); // 提供时序
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DeviceID <<= 8;
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DeviceID |= FlashObj->SpiWriteReadByte(0xff); // 提供时序
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FlashObj->SpiCs(FLASH_CS_HIGH);
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return DeviceID;
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}
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/* FLASH写使能 */
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static void W25Q64_WriteEnable(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(WRITE_ENBALE_CMD);
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FlashObj->SpiCs(FLASH_CS_HIGH);
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}
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/* Flash写失能,由于手册中写明写完会自动进入写失能 */
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//static void W25Q64_WriteDisable(W25Q64JVSSIQ_OBJ * FlashObj)
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//{
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// FlashObj->SpiCs(FLASH_CS_LOW);
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// FlashObj->SpiWriteReadByte(WRITE_DISABLE_CMD);
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// FlashObj->SpiCs(FLASH_CS_HIGH);
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//}
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/* FLASH读取第一个状态寄存器 */
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static unsigned char W25Q64_ReadStaReg(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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unsigned char Sta;
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FlashObj->SpiCs(FLASH_CS_LOW);
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FlashObj->SpiWriteReadByte(READ_STA1_CMD);
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Sta = FlashObj->SpiWriteReadByte(0xFF);
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FlashObj->SpiCs(FLASH_CS_HIGH);
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return Sta;
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}
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/* 判忙 */
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static void W25Q64_WaitNoBusy(W25Q64JVSSIQ_OBJ * FlashObj)
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{
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while (((W25Q64_ReadStaReg(FlashObj)) & 0x01) == 0x01) {
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FlashObj->DelayUs(3);
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}
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}
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