You are going to interface a TSL235 to the FPGA. The TSL235 is a light-to-frequency converter whose output digital bitstream frequency is directly proportional to the intensity of light. You want to count the duration edge to edge of a gated input (TSL235) using the 50MHz clk as the stable clk input. At the end of each period you want to latch the count for display with the green LEDs on the board. For now you can illuminate the TSL235 with any light source you want. Don t worry about calibrating the output just use a count of 2^10, or 1024. You can use a simple voltage divider to convert the 5volts the TSL to 3.3 volts for the FPGA (10k over a 5.1k). Carefully connect the 3.3v the TSL and the GND to inputs on the GPIO header on the DE0 board.

pulseoximiter1
..............\Waveform.vwf
..............\db
..............\..\.cmp.kpt
..............\..\logic_util_heursitic.dat
..............\..\prev_cmp_pulseoximiter1.qmsg
..............\..\pulseoximiter1.asm.qmsg
..............\..\pulseoximiter1.asm.rdb
..............\..\pulseoximiter1.asm_labs.ddb
..............\..\pulseoximiter1.cbx.xml
..............\..\pulseoximiter1.cmp.bpm
..............\..\pulseoximiter1.cmp.cdb
..............\..\pulseoximiter1.cmp.hdb
..............\..\pulseoximiter1.cmp.idb
..............\..\pulseoximiter1.cmp.logdb
..............\..\pulseoximiter1.cmp.rdb
..............\..\pulseoximiter1.cmp_merge.kpt
..............\..\pulseoximiter1.cuda_io_sim_cache.31um_ff_1200mv_0c_fast.hsd
..............\..\pulseoximiter1.cuda_io_sim_cache.31um_tt_1200mv_85c_slow.hsd
..............\..\pulseoximiter1.cuda_io_sim_cache.45um_ff_1200mv_0c_fast.hsd
..............\..\pulseoximiter1.cuda_io_sim_cache.45um_ss_1200mv_85c_slow.hsd
..............\..\pulseoximiter1.db_info
..............\..\pulseoximiter1.eda.qmsg
..............\..\pulseoximiter1.fit.qmsg
..............\..\pulseoximiter1.hier_info
..............\..\pulseoximiter1.hif
..............\..\pulseoximiter1.ipinfo
..............\..\pulseoximiter1.lpc.html
..............\..\pulseoximiter1.lpc.rdb
..............\..\pulseoximiter1.lpc.txt
..............\..\pulseoximiter1.map.ammdb
..............\..\pulseoximiter1.map.bpm
..............\..\pulseoximiter1.map.cdb
..............\..\pulseoximiter1.map.hdb
..............\..\pulseoximiter1.map.kpt
..............\..\pulseoximiter1.map.logdb
..............\..\pulseoximiter1.map.qmsg
..............\..\pulseoximiter1.map.rdb
..............\..\pulseoximiter1.map_bb.cdb
..............\..\pulseoximiter1.map_bb.hdb
..............\..\pulseoximiter1.map_bb.logdb
..............\..\pulseoximiter1.pplq.rdb
..............\..\pulseoximiter1.pre_map.hdb
..............\..\pulseoximiter1.pti_db_list.ddb
..............\..\pulseoximiter1.root_partition.map.reg_db.cdb
..............\..\pulseoximiter1.routing.rdb
..............\..\pulseoximiter1.rtlv.hdb
..............\..\pulseoximiter1.rtlv_sg.cdb
..............\..\pulseoximiter1.rtlv_sg_swap.cdb
..............\..\pulseoximiter1.sgdiff.cdb
..............\..\pulseoximiter1.sgdiff.hdb
..............\..\pulseoximiter1.sld_design_entry.sci
..............\..\pulseoximiter1.sld_design_entry_dsc.sci
..............\..\pulseoximiter1.smart_action.txt
..............\..\pulseoximiter1.smp_dump.txt
..............\..\pulseoximiter1.sta.qmsg
..............\..\pulseoximiter1.sta.rdb
..............\..\pulseoximiter1.sta_cmp.6_slow_1200mv_85c.tdb
..............\..\pulseoximiter1.tis_db_list.ddb
..............\..\pulseoximiter1.tiscmp.fast_1200mv_0c.ddb
..............\..\pulseoximiter1.tiscmp.slow_1200mv_0c.ddb
..............\..\pulseoximiter1.tiscmp.slow_1200mv_85c.ddb
..............\..\pulseoximiter1.vpr.ammdb
..............\incremental_db
..............\..............\README
..............\..............\compiled_partitions
..............\..............\...................\pulseoximiter1.db_info
..............\..............\...................\pulseoximiter1.root_partition.cmp.ammdb
..............\..............\...................\pulseoximiter1.root_partition.cmp.cdb
..............\..............\...................\pulseoximiter1.root_partition.cmp.dfp
..............\..............\...................\pulseoximiter1.root_partition.cmp.hdb
..............\..............\...................\pulseoximiter1.root_partition.cmp.logdb
..............\..............\...................\pulseoximiter1.root_partition.cmp.rcfdb
..............\..............\...................\pulseoximiter1.root_partition.map.cdb
..............\..............\...................\pulseoximiter1.root_partition.map.dpi
..............\..............\...................\pulseoximiter1.root_partition.map.hbdb.cdb
..............\..............\...................\pulseoximiter1.root_partition.map.hbdb.hb_info
..............\..............\...................\pulseoximiter1.root_partition.map.hbdb.hdb
..............\........

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