repo2/firmware_eclairexl/spiflash/spiflash.c @ 1476
| 662 | markw | #include "spiflash.h"
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#include "spi.h"
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| 668 | markw | #include "regs.h"
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| 702 | markw | void readFlashId(int *id1, int *id2)
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{
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int i=0;
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int bytes = 4;
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unsigned char * id1c = (unsigned char *)id1;
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unsigned char * id2c = (unsigned char *)id2;
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unsigned char res;
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flashChipSelect();
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spiTransferByte(0xab);
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for (i=0; i!=bytes; ++i)
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{
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res = spiTransferByte(0xff);
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id1c[i] = res;
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}
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flashChipDeselect();
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flashChipSelect();
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spiTransferByte(0x9f);
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for (i=0; i!=bytes; ++i)
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{
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res = spiTransferByte(0xff);
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id2c[i] = res;
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}
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flashChipDeselect();
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/* id1c[0] = 0x11;
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id1c[1] = 0x22;
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id1c[2] = 0x33;
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id1c[3] = 0x44;
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id2c[0] = 0x55;
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id2c[1] = 0x66;
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id2c[2] = 0x77;
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id2c[3] = 0x88;*/
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}
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| 662 | markw | void readFlash(int address, int bytes, u08 * dest)
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{
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int i=0;
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u08 res;
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flashChipSelect();
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spiTransferByte(0x03);
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res = spiTransferByte((address>>16)&0xff);
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res = spiTransferByte((address>>8)&0xff);
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res = spiTransferByte(address&0xff);
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for (i=0; i!=bytes; ++i)
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{
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res = spiTransferByte(0xff);
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dest[i] = res;
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}
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flashChipDeselect();
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}
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| 668 | markw | void waitWriteComplete()
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| 662 | markw | {
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u08 res;
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while (true)
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{
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flashChipSelect();
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spiTransferByte(0x5); // read status: check if done
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res = spiTransferByte(0xff);
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flashChipDeselect();
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if (0==res&0x1)
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{
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break;
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}
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}
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| 668 | markw | }
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| 662 | markw | ||
| 702 | markw | int flashSectorSize()
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{
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| 880 | markw | int sectorSize; /* Size for D8 erase... */
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| 702 | markw | ||
unsigned int id1,id2;
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readFlashId(&id1,&id2);
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id2 = id2>>8;
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if (id2==0x20ba18)
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{
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sectorSize = 64*1024;
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}
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else if (id2==0x202018)
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{
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sectorSize = 256*1024;
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}
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else if (id2==0x012018)
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{
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sectorSize = 64*1024;
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}
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| 880 | markw | else if (id2==0x1c7018)
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{
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sectorSize = 64*1024;
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}
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| 702 | markw | else
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{
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sectorSize = -1;
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}
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return sectorSize;
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}
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| 668 | markw | void eraseFlash(int address, int bytes)
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{
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u08 res;
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| 662 | markw | ||
| 702 | markw | int sectorSize = flashSectorSize();
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if (sectorSize<0)
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{
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| 752 | markw | return;
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| 702 | markw | }
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| 662 | markw | ||
| 668 | markw | while (bytes>0)
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| 662 | markw | {
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| 668 | markw | flashChipSelect();
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spiTransferByte(0x6); // write enable
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flashChipDeselect();
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flashChipSelect();
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spiTransferByte(0xd8); // erase sector
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res = spiTransferByte((address>>16)&0xff);
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res = spiTransferByte((address>>8)&0xff);
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res = spiTransferByte(address&0xff);
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flashChipDeselect();
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bytes = bytes-sectorSize;
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address = address+sectorSize;
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waitWriteComplete();
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| 662 | markw | }
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| 668 | markw | }
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| 662 | markw | ||
| 668 | markw | void writeFlash(int address, int totalbytes, u08 * dest)
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{
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u08 res;
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while(totalbytes>0)
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{
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int bytes = totalbytes;
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int i;
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if (bytes>256)
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bytes=256; // Have to write in chunks of 256 bytes
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| 662 | markw | ||
| 668 | markw | flashChipSelect();
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spiTransferByte(0x6); // write enable
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flashChipDeselect();
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flashChipSelect();
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spiTransferByte(0x2); // write bytes
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res = spiTransferByte((address>>16)&0xff);
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res = spiTransferByte((address>>8)&0xff);
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res = spiTransferByte(address&0xff);
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for (i=0; i!=bytes; ++i)
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{
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spiTransferByte(dest[i]);
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}
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flashChipDeselect();
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| 662 | markw | ||
| 668 | markw | totalbytes-=bytes;
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address+=bytes;
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| 672 | markw | dest+=bytes;
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| 668 | markw | ||
waitWriteComplete();
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}
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| 662 | markw | }
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