Example #1
0
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)));
    }
}
Example #2
0
/*
 * 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);
      }
    }
  }
}
Example #3
0
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;
}
Example #4
0
/* 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;
}