void dfmemRead (unsigned int page, unsigned int byte, unsigned int length,
unsigned char *data)
{
while(!dfmemIsReady());
// Restructure page/byte addressing
// 1 don't care bit + 13 page address bits + byte address bits
MemAddr.address = (((unsigned long)page) << dfmem_geo.byte_address_bits) + byte;
// Read data from memory
dfmemSelectChip();
dfmemWriteByte(READ_PAGE);
dfmemWriteByte(MemAddr.chr_addr[2]);
dfmemWriteByte(MemAddr.chr_addr[1]);
dfmemWriteByte(MemAddr.chr_addr[0]);
dfmemWriteByte(0x00); // 4 don't care bytes
dfmemWriteByte(0x00);
dfmemWriteByte(0x00);
dfmemWriteByte(0x00);
unsigned int read_bytes;
read_bytes = spic2MassTransmit(length, NULL, 2*length);
dfmemSelectChip(); // Busy wait
spic2ReadBuffer(read_bytes, data); // reads DMA buffer
//while (length--) { *data++ = dfmemReadByte(); }
dfmemDeselectChip();
}
void dfmemReadPage2Buffer (unsigned int page, unsigned char buffer)
{
unsigned char command;
while(!dfmemIsReady());
// Choose command dependent on buffer choice
if (buffer == 1) {
command = READ_PAGE_TO_BUFFER_1;
} else {
command = READ_PAGE_TO_BUFFER_2;
}
// 1 don't care bit + 13 page address bits + don't care bits
MemAddr.address = ((unsigned long)page) << dfmem_geo.byte_address_bits;
// Write data to memory
dfmemSelectChip();
dfmemWriteByte(command);
dfmemWriteByte(MemAddr.chr_addr[2]);
dfmemWriteByte(MemAddr.chr_addr[1]);
dfmemWriteByte(MemAddr.chr_addr[0]);
dfmemDeselectChip();
}
void dfmemWriteBuffer2MemoryNoErase (unsigned int page, unsigned char buffer)
{
unsigned char command;
while(!dfmemIsReady());
// Choose command dependent on buffer choice
if (buffer == 1) {
command = WRITE_BUFFER1_TO_PAGE_NO_ERASE;
} else {
command = WRITE_BUFFER2_TO_PAGE_NO_ERASE;
}
// Restructure page/byte addressing
// 1 don't care bit + 13 page address bits + don't care bits
MemAddr.address = ((unsigned long)page) << dfmem_geo.byte_address_bits;
// Write data to memory
dfmemSelectChip();
dfmemWriteByte(command);
dfmemWriteByte(MemAddr.chr_addr[2]);
dfmemWriteByte(MemAddr.chr_addr[1]);
dfmemWriteByte(MemAddr.chr_addr[0]);
currentBufferOffset = 0;
dfmemDeselectChip();
}
void dfmemWriteBuffer (unsigned char *data, unsigned int length,
unsigned int byte, unsigned char buffer)
{
unsigned char command;
// Choose command dependent on buffer choice
if (buffer == 1) {
command = WRITE_TO_BUFFER1;
} else {
command = WRITE_TO_BUFFER2;
}
// Restructure page/byte addressing
// 14 don't care bit + byte address bits
MemAddr.address = (unsigned long)byte;
// Write data to memory
dfmemSelectChip();
dfmemWriteByte(command);
dfmemWriteByte(MemAddr.chr_addr[2]);
dfmemWriteByte(MemAddr.chr_addr[1]);
dfmemWriteByte(MemAddr.chr_addr[0]);
spic2MassTransmit(length, data, 2*length);
}
void dfmemWrite (unsigned char *data, unsigned int length, unsigned int page,
unsigned int byte, unsigned char buffer)
{
unsigned char command;
while(!dfmemIsReady());
// Choose command dependent on buffer choice
if (buffer == 1) {
command = WRITE_PAGE_VIA_BUFFER1;
} else {
command = WRITE_PAGE_VIA_BUFFER2;
}
// Restructure page/byte addressing
// 1 don't care bit + 13 page address bits + byte address bits
MemAddr.address = (((unsigned long)page) << dfmem_geo.byte_address_bits) + byte;
// Write data to memory
dfmemSelectChip();
dfmemWriteByte(command);
dfmemWriteByte(MemAddr.chr_addr[2]);
dfmemWriteByte(MemAddr.chr_addr[1]);
dfmemWriteByte(MemAddr.chr_addr[0]);
spic2MassTransmit(length, data, 2*length);
//while (length--) { dfmemWriteByte(*data++); }
//dfmemDeselectChip();
}
void dfmemRead (unsigned int page, unsigned int byte, unsigned int length,
unsigned char *data)
{
while(!dfmemIsReady());
// Restructure page/byte addressing
// 1 don't care bit + 13 page address bits + byte address bits
MemAddr.address = (((unsigned long)page) << dfmem_byte_address_bits) + byte;
// Read data from memory
dfmemSelectChip();
dfmemWriteByte(READ_PAGE);
dfmemWriteByte(MemAddr.chr_addr[2]);
dfmemWriteByte(MemAddr.chr_addr[1]);
dfmemWriteByte(MemAddr.chr_addr[0]);
dfmemWriteByte(0x00); // 4 don't care bytes
dfmemWriteByte(0x00);
dfmemWriteByte(0x00);
dfmemWriteByte(0x00);
while (length--) { *data++ = dfmemReadByte(); }
dfmemDeselectChip();
}
void dfmemResumeFromDeepSleep()
{
dfmemSelectChip();
dfmemWriteByte(0xAB);
dfmemDeselectChip();
}
void dfmemDeepSleep()
{
dfmemSelectChip();
dfmemWriteByte(0xB9);
dfmemDeselectChip();
}
// The manufacturer and device id command (0x9F) returns 4 bytes normally
// (including info on id, family, density, etc.), but this functions returns
// just the manufacturer id and discards the rest when de-selecting the chip.
unsigned char dfmemGetManufacturerID (void)
{
unsigned char byte;
dfmemSelectChip();
dfmemWriteByte(0x9F);
byte = dfmemReadByte();
dfmemDeselectChip();
return byte;
}
unsigned char dfmemGetStatus (void)
{
unsigned char byte;
dfmemSelectChip();
dfmemWriteByte(0xD7);
byte = dfmemReadByte();
dfmemDeselectChip();
return byte;
}
void dfmemEraseChip (void)
{
while(!dfmemIsReady());
dfmemSelectChip();
dfmemWriteByte(0xC7);
dfmemWriteByte(0x94);
dfmemWriteByte(0x80);
dfmemWriteByte(0x9A);
dfmemDeselectChip();
}
// The manufacturer and device id command (0x9F) returns 4 bytes normally
// (including info on id, family, density, etc.), but this functions returns
// only the 5 bits pertaining to the memory density.
unsigned char dfmemGetChipSize (void)
{
unsigned char byte;
dfmemSelectChip();
dfmemWriteByte(0x9F);
byte = dfmemReadByte(); // Manufacturer ID, not needed
byte = dfmemReadByte() & 0b00011111;
dfmemDeselectChip();
return byte;
}
void dfmemEraseSector (unsigned int page)
{
while(!dfmemIsReady());
// Restructure page/byte addressing
MemAddr.address = ((unsigned long)page) << dfmem_geo.byte_address_bits;
// Write data to memory
dfmemSelectChip();
dfmemWriteByte(ERASE_SECTOR);
dfmemWriteByte(MemAddr.chr_addr[2]);
dfmemWriteByte(MemAddr.chr_addr[1]);
dfmemWriteByte(MemAddr.chr_addr[0]);
dfmemDeselectChip();
}