Rev |
Log message |
Author |
Age |
Path |
20 |
- removed folder trunk/bench.
- added ISE13.1 complete project, with synthesis, map, place & route and timing reports. This project generates bitgen file to program a Digilent Atlys board to verify the cores in FPGA hardware, and include a simulation testbench to simulate the cores. |
jdoin |
4613d 21h |
/spi_master_slave/trunk/rtl/ |
19 |
v2.02.0123: ISSUE: continuous transfer mode bug, for ignored 'di_req' cycles. Instead of repeating the last data word, the slave will send (others => '0') instead. |
jdoin |
4615d 20h |
/spi_master_slave/trunk/rtl/ |
18 |
v2.02.0122: Fixed bug SLAVE Continuous Transfer.
The fix consists in engaging continuous transfer regardless of the user strobing write enable, and sequencing from state 1 to N as long as the master clock is present.
If the user does not write new data, the last data word is repeated. |
jdoin |
4616d 03h |
/spi_master_slave/trunk/rtl/ |
16 |
Master: v1.15.0136 [JD] Fixed assertions (PREFETCH >= 1) and minor comment bugs.
Slave: v2.02.0121 [JD] Changed minor comment bugs in the combinatorial fsm logic. |
jdoin |
4619d 18h |
/spi_master_slave/trunk/rtl/ |
14 |
Updated specifications manual, deleted old documentation stuff, changed minor text errors in the code. |
jdoin |
4621d 22h |
/spi_master_slave/trunk/rtl/ |
13 |
spi_slave.vhd: v2.02.0120
spi_master.vhd: v1.15.0135
Several bugs fixed. Master and Slave cores tested at all spi modes, at 50MHz SCK, including continuous transfers. |
jdoin |
4622d 18h |
/spi_master_slave/trunk/rtl/ |
12 |
SPI_SLAVE: v2.00.0110 [JD] FIX: CPHA bugs:
-- - redesigned core clocking to address all CPOL and CPHA configurations.
-- - added CHANGE_EDGE to the FSM register transfer logic, to have MISO change at opposite
-- clock phases from SHIFT_EDGE.
-- Removed global signal setting at the FSM, implementing exhaustive explicit signal attributions
-- for each state, to avoid reported inference problems in some synthesis engines.
-- Streamlined port names and indentation blocks. |
jdoin |
4626d 18h |
/spi_master_slave/trunk/rtl/ |
11 |
v1.12.0105: Modified SCK output circuit in spi_master.vhd.
In CPHA='0', top speed is +50MHz, in CPHA='1', top speed is 25MHz. |
jdoin |
4637d 17h |
/spi_master_slave/trunk/rtl/ |
10 |
v1.11.0080: Changed sampling of MISO in spi_master.vhd (removed the input register).
Verified master+slave cores in silicon on a Spartan-6 FPGA at 100MHz, using Xilinx ISE 13.1 and a Digilent Atlys board. Project is included in trunk/syn/spi_master_atlys.xise. |
jdoin |
4638d 18h |
/spi_master_slave/trunk/rtl/ |
8 |
Updated Documentation |
jdoin |
4642d 06h |
/spi_master_slave/trunk/rtl/ |
7 |
Updated code comments in VHDL files, added readme.txt files, updated work-in-progress version of the .doc core specification manual. |
jdoin |
4642d 20h |
/spi_master_slave/trunk/rtl/ |
6 |
v1.10.0075: Changed clocking to use a single high-speed clock for the whole core, using clock enables to control slower timing.
Added SPI line clock divider from high-speed system clock.
Added pipeline delay logic to sync phase of SCK and MOSI, enabling very high operating frequencies.
Verified in silicon for SCK and MOSI at 50MHz, with very robust operation. |
jdoin |
4644d 17h |
/spi_master_slave/trunk/rtl/ |
5 |
Changed clocking to use a single high-speed clock for the whole core, using clock enables to control slower timing.
Added SPI line clock divider from high-speed system clock.
Added pipeline delay logic to sync phase of SCK and MOSI, enabling very high operating frequencies.
Verified in silicon for SCK and MOSI at 50MHz, with very robust operation. |
jdoin |
4644d 17h |
/spi_master_slave/trunk/rtl/ |
4 |
v0.97.0068 - streamlined resets and clock enables to reduce area
v0.97.0075 - redesigned parallel interfaces, with pipelined data transport for async clock domains
v0.97.0083 - fixed bug "CPHA effect": redesigned SCK output circuit
v0.97.0086 - removed master MISO input register: got 33MHz. |
jdoin |
4669d 18h |
/spi_master_slave/trunk/rtl/ |
3 |
- fixed fsm async glitches at state changes
- changed async clears to sync resets
- improved idle state logic for parallel interface
- added cross-clock register buffers
- exposed internal state and nets for debug |
jdoin |
4678d 16h |
/spi_master_slave/trunk/rtl/ |
2 |
v0.95.0050 - Master/Slave loopback verified at 25MHz. |
jdoin |
4686d 21h |
/spi_master_slave/trunk/rtl/ |