void noinline ow_write_byte(uint8_t busmask, uint8_t value)
{
OW_CONFIG_OUTPUT(busmask);
for (uint8_t i = 0; i < 8; i++) {
ow_write(busmask, (uint8_t)(value & _BV(i)));
}
}
/*
* wbook_store_workbook(struct wbookctx *wbook)
*
* Assemble worksheets into a workbook and send the BIFF data to an OLE
* storage.
*
*/
void wbook_store_workbook(struct wbookctx *wbook)
{
struct owctx *ole = wbook->OLEwriter;
int i;
/* Call the finalization methods for each worksheet */
for (i = 0; i < wbook->sheetcount; i++) {
wsheet_close(wbook->sheets[i]);
}
/* Add workbook globals */
bw_store_bof(wbook->biff, 0x0005);
wbook_store_codepage(wbook);
wbook_store_window1(wbook);
wbook_store_1904(wbook);
wbook_store_all_fonts(wbook);
wbook_store_all_num_formats(wbook);
wbook_store_all_xfs(wbook);
wbook_store_all_styles(wbook);
wbook_calc_sheet_offsets(wbook);
/* Add BOUNDSHEET records */
for (i = 0; i < wbook->sheetcount; i++) {
wbook_store_boundsheet(wbook, wbook->sheets[i]->name, wbook->sheets[i]->offset);
}
bw_store_eof(wbook->biff);
/* Write Worksheet data if data <~ 7MB */
if (ow_set_size(ole, wbook->biffsize)) {
ow_write_header(ole);
ow_write(ole, wbook->biff->data, wbook->biff->datasize);
for (i = 0; i < wbook->sheetcount; i++) {
unsigned char *tmp;
size_t size;
while ((tmp = wsheet_get_data(wbook->sheets[i], &size))) {
ow_write(ole, tmp, size);
free(tmp);
}
}
}
}
int8_t noinline ow_match_rom(ow_rom_code_t *rom)
{
/* reset the bus */
if (!reset_onewire(ONEWIRE_BUSMASK))
return -1;
/* transmit command byte */
ow_write_byte(ONEWIRE_BUSMASK, OW_ROM_MATCH_ROM);
/* transmit rom code */
for (uint8_t i = 0; i < 8; i++) {
for (uint8_t j = 0; j < 8; j++) {
ow_write(ONEWIRE_BUSMASK, (uint8_t)(rom->bytewise[i] & _BV(j)));
}
}
return 1;
}
/* high-level functions */
int8_t noinline ow_search_rom(uint8_t busmask, uint8_t first)
{
/* reset discover state machine */
if (first) {
ow_global.last_discrepancy = -1;
/* reset rom code */
for (uint8_t i = 0; i < 8; i++)
ow_global.current_rom.bytewise[i] = 0;
} else {
/* if last_discrepancy is below zero, discovery is done */
if (ow_global.last_discrepancy < 0)
return 0;
}
int8_t discrepancy = -1;
/* reset the bus */
if (!reset_onewire(busmask))
return -1;
/* transmit command byte */
ow_write_byte(busmask, OW_ROM_SEARCH_ROM);
for (uint8_t i = 0; i <64; i++) {
/* read bits */
uint8_t bit1 = ow_read(busmask);
uint8_t bits = (uint8_t)((ow_read(busmask) << 1) | bit1);
if (bits == 3) {
/* no devices, just return */
return 0;
} else if (bits == 0) {
if (i == ow_global.last_discrepancy) {
/* set one */
ow_set_address_bit(&ow_global.current_rom, i, 1);
/* transmit one next time */
bit1 = 1;
} else if (i > ow_global.last_discrepancy) {
/* set zero */
ow_set_address_bit(&ow_global.current_rom, i, 0);
discrepancy = (int8_t)i;
} else {
uint8_t rom_bit = (uint8_t)(ow_global.current_rom.bytewise[i / 8] & _BV(i % 8));
if (rom_bit == 0)
discrepancy = (int8_t)i;
/* transmit last bit next time */
bit1 = rom_bit;
}
} else {
/* normal case, no discrepancy */
ow_set_address_bit(&ow_global.current_rom, i, bit1);
}
OW_CONFIG_OUTPUT(busmask);
/* select next bit */
ow_write(busmask, bit1);
}
ow_global.last_discrepancy = discrepancy;
/* new device discovered */
return 1;
}
