/* only called for a single page, and that page is 0,1,2 only*/
static GOOD_OR_BAD OW_w_page(const BYTE * data, size_t size, off_t offset, const struct parsedname *pn)
{
int page = offset / _1W_2436_PAGESIZE; // integer round-down ok
BYTE scratchin[] = { _1W_READ_SCRATCHPAD, offset, };
BYTE scratchout[] = { _1W_WRITE_SCRATCHPAD, offset, };
BYTE p[_1W_2436_PAGESIZE];
static BYTE copyout[] = { _1W_COPY_SP1_TO_NV1, _1W_COPY_SP2_TO_NV2, _1W_COPY_SP3_TO_NV3, };
BYTE *copy = ©out[page];
struct transaction_log twrite[] = {
TRXN_START,
TRXN_WRITE2(scratchout),
TRXN_WRITE(data, size),
TRXN_END,
};
struct transaction_log tread[] = {
TRXN_START,
TRXN_WRITE2(scratchin),
TRXN_READ(p, size),
TRXN_COMPARE(data, p, size),
TRXN_END,
};
struct transaction_log tcopy[] = {
TRXN_START,
TRXN_WRITE1(copy),
TRXN_DELAY(10),
TRXN_END,
};
RETURN_BAD_IF_BAD(BUS_transaction(twrite, pn)) ;
RETURN_BAD_IF_BAD(BUS_transaction(tread, pn)) ;
return BUS_transaction(tcopy, pn) ;
}
/* PAged access -- pre-screened */
static GOOD_OR_BAD OW_w_mem(BYTE * data, size_t size, off_t offset, struct parsedname *pn)
{
BYTE p[4 + 32] = { _1W_WRITE_SCRATCHPAD, LOW_HIGH_ADDRESS(offset), };
struct transaction_log tcopy[] = {
TRXN_START,
TRXN_WRITE3(p),
TRXN_WRITE(data, size),
TRXN_END,
};
struct transaction_log tread[] = {
TRXN_START,
TRXN_WRITE1(p),
TRXN_READ(&p[1], 3 + size),
TRXN_COMPARE(data, &p[4], size),
TRXN_END,
};
struct transaction_log tsram[] = {
TRXN_START,
TRXN_WRITE(p, 4),
TRXN_DELAY(32),
TRXN_END,
};
/* Copy to scratchpad */
RETURN_BAD_IF_BAD(BUS_transaction(tcopy, pn)) ;
/* Re-read scratchpad and compare */
p[0] = _1W_READ_SCRATCHPAD;
RETURN_BAD_IF_BAD(BUS_transaction(tread, pn)) ;
/* Copy Scratchpad to SRAM */
p[0] = _1W_COPY_SCRATCHPAD;
return BUS_transaction(tsram, pn) ;
}
/* Byte-oriented write */
static GOOD_OR_BAD OW_w_mem(const BYTE * data, size_t size, off_t offset, const struct parsedname *pn)
{
BYTE scratch[_DS2430A_MEM_SIZE];
BYTE vr[] = { _1W_READ_SCRATCHPAD, BYTE_MASK(offset), };
BYTE of[] = { _1W_WRITE_SCRATCHPAD, BYTE_MASK(offset), };
BYTE cp[] = { _1W_COPY_SCRATCHPAD, _1W_COPY_SCRATCHPAD_VALIDATION_KEY, };
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE2(of),
TRXN_WRITE(data, size),
TRXN_START,
TRXN_WRITE2(vr),
TRXN_READ(scratch, size),
TRXN_COMPARE(data,scratch,size),
TRXN_START,
TRXN_WRITE2(cp),
TRXN_DELAY(10),
TRXN_END,
};
/* load scratch pad if incomplete write */
if ( size != _DS2430A_MEM_SIZE ) {
RETURN_BAD_IF_BAD( OW_r_mem( scratch, 0, 0x00, pn)) ;
}
/* write data to scratchpad */
/* read back the scratchpad */
/* copy scratchpad to memory */
return BUS_transaction(t, pn);
}
static GOOD_OR_BAD OW_r_app(BYTE * data, size_t size, off_t offset, const struct parsedname *pn)
{
BYTE c3[] = { _1W_READ_APPLICATION_REGISTER, BYTE_MASK(offset), };
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE2(c3),
TRXN_READ(data, size),
TRXN_END,
};
return BUS_transaction(t, pn) ;
}
/* Byte-oriented write */
static GOOD_OR_BAD OW_r_mem( BYTE * data, size_t size, off_t offset, const struct parsedname *pn)
{
BYTE fo[] = { _1W_READ_MEMORY, BYTE_MASK(offset), };
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE2(fo),
TRXN_READ( data, size ) ,
TRXN_END,
};
return BUS_transaction(t, pn);
}
static GOOD_OR_BAD OW_r_scratch(BYTE * data, int length, const struct parsedname *pn)
{
BYTE read_command[1] = { _LCD_COMMAND_SCRATCHPAD_READ, };
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE1(read_command),
TRXN_READ(data, length),
TRXN_END,
};
return BUS_transaction(t, pn);
}
/* paged, and pre-screened */
static GOOD_OR_BAD OW_w_23page(BYTE * data, size_t size, off_t offset, struct parsedname *pn)
{
BYTE p[1 + 2 + 32 + 2] = { _1W_WRITE_SCRATCHPAD, LOW_HIGH_ADDRESS(offset), };
struct transaction_log tcopy[] = {
TRXN_START,
TRXN_WR_CRC16(p, 3 + size, 0),
TRXN_END,
};
struct transaction_log treread[] = {
TRXN_START,
TRXN_WRITE1(p),
TRXN_READ(&p[1], 3 + size),
TRXN_COMPARE(&p[4], data, size),
TRXN_END,
};
struct transaction_log twrite33[] = {
TRXN_START,
TRXN_WRITE(p, 4),
TRXN_DELAY(5),
TRXN_END,
};
struct transaction_log twriteEC20[] = {
TRXN_START,
TRXN_WRITE(p, 4),
TRXN_DELAY(10),
TRXN_END,
};
/* Copy to scratchpad */
memcpy(&p[3], data, size);
if (((offset + size) & 0x1F)) { // doesn't end on page boundary, no crc16
tcopy[2].type = tcopy[3].type = trxn_nop;
}
RETURN_BAD_IF_BAD(BUS_transaction(tcopy, pn)) ;
/* Re-read scratchpad and compare */
/* Note that we tacitly shift the data one byte down for the E/S byte */
p[0] = _1W_READ_SCRATCHPAD;
RETURN_BAD_IF_BAD(BUS_transaction(treread, pn)) ;
/* Copy Scratchpad to SRAM */
p[0] = _1W_COPY_SCRATCHPAD;
switch (pn->sn[0]) {
case 0x23: // DS2433
return BUS_transaction(twrite33,pn);
case 0x43:
default: // DS28EC20
return BUS_transaction(twriteEC20,pn);
}
}
/* No CRC -- 0xF0 code */
GOOD_OR_BAD COMMON_read_memory_F0(struct one_wire_query *owq, size_t page, size_t pagesize)
{
off_t offset = OWQ_offset(owq) + page * pagesize;
BYTE p[3] = { _1W_READ_F0, LOW_HIGH_ADDRESS(offset), };
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE3(p),
TRXN_READ((BYTE *) OWQ_buffer(owq), OWQ_size(owq)),
TRXN_END,
};
Set_OWQ_length(owq);
return BUS_transaction(t, PN(owq));
}
// use new read_all command
static GOOD_OR_BAD OW_r_all(BYTE * data, size_t size, off_t offset, struct parsedname *pn)
{
BYTE p[4] = { _1W_READ_ALL, LOW_HIGH_ADDRESS(offset), };
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE3(p),
TRXN_READ1(&p[3]),
TRXN_CRC8(p, 4),
TRXN_READ(data, size),
};
RETURN_BAD_IF_BAD(BUS_transaction(t, pn)) ;
return gbGOOD;
}
// reads to end of page and discards extra
// uses CRC8
static GOOD_OR_BAD OW_r_page(BYTE * data, size_t size, off_t offset, struct parsedname *pn)
{
BYTE p[4] = { _1W_READ_DATA_CRC8, LOW_HIGH_ADDRESS(offset), };
BYTE q[33];
int rest = 33 - (offset & 0x1F);
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE3(p),
TRXN_READ1(&p[3]),
TRXN_CRC8(p, 4),
TRXN_READ(q, rest),
TRXN_CRC8(q, rest),
TRXN_END,
};
RETURN_BAD_IF_BAD(BUS_transaction(t, pn)) ;
memcpy(data, q, size);
return gbGOOD;
}
/* paged, and pre-screened */
static GOOD_OR_BAD OW_w_mem(BYTE * data, size_t size, off_t offset, struct parsedname *pn)
{
BYTE p[1 + 2 + 32 + 2] = { _1W_WRITE_SCRATCHPAD, LOW_HIGH_ADDRESS(offset), };
struct transaction_log tcopy[] = {
TRXN_START,
TRXN_WRITE(p, 3 + size),
TRXN_END,
};
struct transaction_log tcopy_crc16[] = {
TRXN_START,
TRXN_WR_CRC16(p, 3 + size, 0),
TRXN_END,
};
struct transaction_log tread[] = {
TRXN_START,
TRXN_WRITE1(p),
TRXN_READ(&p[1], 3 + size),
TRXN_COMPARE(data, &p[4], size),
TRXN_END,
};
struct transaction_log tsram[] = {
TRXN_START,
TRXN_WRITE(p, 4),
TRXN_END,
};
/* Copy to scratchpad */
memcpy(&p[3], data, size);
RETURN_BAD_IF_BAD(BUS_transaction(((offset + size) & 0x1F) != 0 ? tcopy : tcopy_crc16, pn)) ;
/* Re-read scratchpad and compare */
/* Note that we tacitly shift the data one byte down for the E/S byte */
p[0] = _1W_READ_SCRATCHPAD;
RETURN_BAD_IF_BAD(BUS_transaction(tread, pn)) ;
/* Copy Scratchpad to SRAM */
p[0] = _1W_COPY_SCRATCHPAD;
return BUS_transaction(tsram, pn) ;
}
/* only called for a single page, and that page is 0,1,2 only*/
static GOOD_OR_BAD OW_r_page(BYTE * data, size_t size, off_t offset, const struct parsedname *pn)
{
int page = offset / _1W_2436_PAGESIZE; // integer round-down ok
BYTE scratchin[] = { _1W_READ_SCRATCHPAD, offset, };
static BYTE copyin[] = { _1W_COPY_NV1_TO_SP1, _1W_COPY_NV2_TO_SP2, _1W_COPY_NV3_TO_SP3, };
BYTE *copy = ©in[page];
struct transaction_log tcopy[] = {
TRXN_START,
TRXN_WRITE1(copy),
TRXN_DELAY(10),
TRXN_END,
};
struct transaction_log tscratch[] = {
TRXN_START,
TRXN_WRITE2(scratchin),
TRXN_READ(data, size),
TRXN_END,
};
RETURN_BAD_IF_BAD(BUS_transaction(tcopy, pn)) ;
return BUS_transaction(tscratch, pn) ;
}
static GOOD_OR_BAD OW_r_std(BYTE *buf, size_t *buflen, BYTE type, BYTE stype, const struct parsedname *pn)
{
BYTE p[3] = { _1W_READ_MOAT, type,stype };
size_t maxlen = *buflen;
BYTE len;
GOOD_OR_BAD ret = gbGOOD;
struct transaction_log tfirst[] = {
TRXN_START,
TRXN_WRITE3(p),
TRXN_READ1(&len),
TRXN_END,
};
if (maxlen == 0) {
return gbGOOD;
}
LEVEL_DEBUG( "read: read len for %d %d",type,stype) ;
/* 0xFF means the device was too slow */
if ( BAD(BUS_transaction(tfirst, pn)) || len == 0xFF) {
goto out_bad;
}
LEVEL_DEBUG( "read: got len %d",len) ;
if (len > maxlen) {
/* don't read all and don't bother with CRC.
* This will abort the read on the client side so that
* there'll be no side effects like marked-as-sent buffers
* or cleared 'conditional search' flags */
struct transaction_log tinfo[] = {
TRXN_READ(buf,maxlen),
TRXN_END,
};
if ( BAD(BUS_transaction(tinfo, pn)) ) {
goto out_bad;
}
} else {
UINT crc;
BYTE crcbuf[2];
struct transaction_log recv_buf[] = {
TRXN_READ(buf,len),
TRXN_READ2(crcbuf),
TRXN_END,
};
struct transaction_log recv_crc[] = {
TRXN_READ2(crcbuf),
TRXN_END,
};
struct transaction_log xmit_crc[] = {
TRXN_WRITE2(crcbuf),
TRXN_END,
};
if ( BAD(BUS_transaction(len ? recv_buf : recv_crc, pn)) ) {
goto out_bad;
}
crc = CRC16compute(p,3,0);
crc = CRC16compute(&len,1,crc);
if (len) crc = CRC16compute(buf,len,crc);
LEVEL_DEBUG( "read CRC: GOOD, got %02x%02x",crcbuf[0],crcbuf[1]) ;
if ( CRC16seeded (crcbuf,2,crc) ) {
LEVEL_DEBUG("CRC error");
goto out_bad;
}
crcbuf[0] = ~crcbuf[0];
crcbuf[1] = ~crcbuf[1];
if ( BAD(BUS_transaction(xmit_crc, pn)) ) {
goto out_bad;
}
*buflen = len;
}
LEVEL_DEBUG( "read: GOOD, got %d",*buflen) ;
return ret;
out_bad:
return gbBAD;
}
