/* write flag */
static ZERO_OR_ERROR FS_w_flag(struct one_wire_query *owq)
{
struct parsedname *pn = PN(owq);
BYTE cr;
BYTE fl = pn->selected_filetype->data.c;
OWQ_allocate_struct_and_pointer(owq_flag);
OWQ_create_temporary(owq_flag, (char *) &cr, 1, 0x0201, pn);
if (COMMON_read_memory_F0(owq_flag, 0, 0)) {
return -EINVAL;
}
if (OWQ_Y(owq)) {
if (cr & fl) {
return 0;
}
} else {
if ((cr & fl) == 0) {
return 0;
}
}
cr ^= fl; /* flip the bit */
if (OW_w_mem(&cr, 1, 0x0201, pn)) {
return -EINVAL;
}
return 0;
}
static GOOD_OR_BAD OW_r_mem(BYTE * p, size_t size, off_t offset, struct parsedname *pn)
{
OWQ_allocate_struct_and_pointer(owq_read);
OWQ_create_temporary(owq_read, (char *) p, size, offset, pn);
return COMMON_read_memory_crc16_AA(owq_read, 0, _1W_2450_PAGESIZE);
}
static ZERO_OR_ERROR FS_r_set_alarm(struct one_wire_query *owq)
{
BYTE c;
OWQ_allocate_struct_and_pointer(owq_alarm);
OWQ_create_temporary(owq_alarm, (char *) &c, 1, 0x0200, PN(owq));
if (COMMON_read_memory_F0(owq_alarm, 0, 0)) {
return -EINVAL;
}
OWQ_U(owq) = Avals[(c >> 3) & 0x07];
return 0;
}
/* read flag */
static ZERO_OR_ERROR FS_r_flag(struct one_wire_query *owq)
{
struct parsedname *pn = PN(owq);
BYTE cr;
BYTE fl = pn->selected_filetype->data.c;
OWQ_allocate_struct_and_pointer(owq_flag);
OWQ_create_temporary(owq_flag, (char *) &cr, 1, 0x0201, pn);
if (COMMON_read_memory_F0(owq_flag, 0, 0)) {
return -EINVAL;
}
OWQ_Y(owq) = (cr & fl) ? 1 : 0;
return 0;
}
/* read REAL DS2431 pages -- 8 bytes. */
static GOOD_OR_BAD OW_w_2Dpage(BYTE * data, size_t size, off_t offset, struct parsedname *pn)
{
off_t pageoff = offset & 0x07;
BYTE p[4 + 8 + 2] = { _1W_WRITE_SCRATCHPAD, LOW_HIGH_ADDRESS(offset - pageoff),
};
struct transaction_log tcopy[] = {
TRXN_START,
TRXN_WRITE(p, 3 + 8),
TRXN_END,
};
struct transaction_log tread[] = {
TRXN_START,
TRXN_WR_CRC16(p, 1, 3 + 8),
TRXN_COMPARE(&p[4], data, size),
TRXN_END,
};
struct transaction_log tsram[] = {
TRXN_START,
TRXN_WRITE(p, 4),
TRXN_DELAY(13),
TRXN_END,
};
if (size != 8) { // incomplete page
OWQ_allocate_struct_and_pointer(owq_old);
OWQ_create_temporary(owq_old, (char *) &p[3], 8, offset - pageoff, pn);
if (COMMON_read_memory_F0(owq_old, 0, 0)) {
return gbBAD;
}
}
memcpy(&p[3 + pageoff], data, size);
/* 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) ;
}
/* read 4 or 5 byte number */
static GOOD_OR_BAD OW_r_ulong(uint64_t * L, size_t size, off_t offset, struct parsedname *pn)
{
BYTE data[5] = { 0x00, 0x00, 0x00, 0x00, 0x00, };
OWQ_allocate_struct_and_pointer(owq_ulong);
OWQ_create_temporary(owq_ulong, (char *) data, size, offset, pn);
if (size > 5) {
return gbBAD;
}
if (COMMON_read_memory_F0(owq_ulong, 0, 0)) {
return gbBAD;
}
L[0] = ((uint64_t) data[0])
+ (((uint64_t) data[1]) << 8)
+ (((uint64_t) data[2]) << 16)
+ (((uint64_t) data[3]) << 24)
+ (((uint64_t) data[4]) << 32);
return gbGOOD;
}
