// 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;
}
// 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;
}
static GOOD_OR_BAD OW_w_byte(BYTE data, off_t offset, struct parsedname *pn)
{
BYTE p[5] = { _1W_WRITE_MEMORY, LOW_HIGH_ADDRESS(offset), data, 0xFF };
BYTE q[1];
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE(p,4),
TRXN_READ1(&p[4]),
TRXN_CRC8(p, 4+1),
TRXN_PROGRAM,
TRXN_READ1(q),
TRXN_COMPARE(q,&data,1) ,
TRXN_END,
};
return BUS_transaction(t, pn) ;
}
// uses CRC8
static GOOD_OR_BAD OW_reading(BYTE * data, struct parsedname *pn)
{
BYTE p[1] = { _1W_READ_SCRATCHPAD, };
BYTE q[3];
struct transaction_log t[] = {
TRXN_START,
TRXN_WRITE1(p),
TRXN_WRITE2(q),
TRXN_READ1(&q[2]),
TRXN_CRC8(q,3),
TRXN_END,
};
RETURN_BAD_IF_BAD(BUS_transaction(t, pn)) ;
memcpy(data, q, 2);
return gbGOOD;
}