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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
Ignore local settings files. Get project compiling on my computer.
2020-11-14 23:37:17 +00:00
<?fileVersion 4.0.0?><cproject storage_type_id="org.eclipse.cdt.core.XmlProjectDescriptionStorage">
Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Ignore local settings files. Get project compiling on my computer.
2020-11-14 23:37:17 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Ignore local settings files. Get project compiling on my computer.
2020-11-14 23:37:17 +00:00
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Added LUFA into the project, right now just for some demo stuff.
2011-12-10 06:11:31 +00:00
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I got the device identification working, and I'm in the middle of breaking it into its own set of functions for write cycles, read cycles, unlock sequence, etc.
2011-12-11 02:40:30 +00:00
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Break out code into a HAL, optimize flash operations This makes the code pretty easily portable to other architectures if someone wants to make a more modern SIMM programmer. I also was pretty careful to split responsibilities of the different components and give the existing components better names. I'm pretty happy with the organization of the code now. As part of this change I have also heavily optimized the code. In particular, the read and write cycle routines are very important to the overall performance of the programmer. In these routines I had to make some tradeoffs of code performance versus prettiness, but the overall result is much faster programming. Some of these performance changes are the result of what I discovered when I upgraded my AVR compiler. I discovered that it is smarter at looking at 32-bit variables when I use a union instead of bitwise operations. I also shaved off more CPU cycles by carefully making a few small tweaks. I added a bypass for the "program only some chips" mask, because it was adding unnecessary CPU cycles for a feature that is rarely used. I removed the verification feature from the write routine, because we can always verify the data after the write chunk is complete, which is more efficient. I also added assumptions about the initial/final state of the CS/OE/WE pins, which allowed me to remove more valuable CPU cycles from the read/write cycle routines. There are also a few enormous performance optimizations I should have done a long time ago: 1) The code was only handling one received byte per main loop iteration. Reading every byte available cut nearly a minute off of the 8 MB programming time. 2) The code wasn't taking advantage of the faster programming command available in the chips used on the 8 MB SIMM. The end result of all of these optimizations is I have programming time of the 8 MB SIMM down to 3:31 (it used to be 8:43). Another minor issue I fixed: the Micron SIMM chip identification wasn't working properly. It was outputting the manufacturer ID again instead of the device ID.
2020-11-18 05:03:32 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Started writing more command handling
2011-12-11 16:35:53 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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OK -- so I separated the actual port code from the external memory controller code. I think this makes more sense. It does add some complexity to the code. I may be going through a chain of calls just to turn the CS pin on, for instance. Hopefully I'm not going too crazy with this. Anyway, this means that I can control the ports from a SIMM electrical test routine using the same types of functions that the actual programming controlling code would use, without having to duplicate a bunch of port definitions and bit manipulation. I made sure to add all the functions I can think of needing to the ports module. We'll see if I got them all!
2011-11-27 08:01:29 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Added LUFA into the project, right now just for some demo stuff.
2011-12-10 06:11:31 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Break out code into a HAL, optimize flash operations This makes the code pretty easily portable to other architectures if someone wants to make a more modern SIMM programmer. I also was pretty careful to split responsibilities of the different components and give the existing components better names. I'm pretty happy with the organization of the code now. As part of this change I have also heavily optimized the code. In particular, the read and write cycle routines are very important to the overall performance of the programmer. In these routines I had to make some tradeoffs of code performance versus prettiness, but the overall result is much faster programming. Some of these performance changes are the result of what I discovered when I upgraded my AVR compiler. I discovered that it is smarter at looking at 32-bit variables when I use a union instead of bitwise operations. I also shaved off more CPU cycles by carefully making a few small tweaks. I added a bypass for the "program only some chips" mask, because it was adding unnecessary CPU cycles for a feature that is rarely used. I removed the verification feature from the write routine, because we can always verify the data after the write chunk is complete, which is more efficient. I also added assumptions about the initial/final state of the CS/OE/WE pins, which allowed me to remove more valuable CPU cycles from the read/write cycle routines. There are also a few enormous performance optimizations I should have done a long time ago: 1) The code was only handling one received byte per main loop iteration. Reading every byte available cut nearly a minute off of the 8 MB programming time. 2) The code wasn't taking advantage of the faster programming command available in the chips used on the 8 MB SIMM. The end result of all of these optimizations is I have programming time of the 8 MB SIMM down to 3:31 (it used to be 8:43). Another minor issue I fixed: the Micron SIMM chip identification wasn't working properly. It was outputting the manufacturer ID again instead of the device ID.
2020-11-18 05:03:32 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Ignore local settings files. Get project compiling on my computer.
2020-11-14 23:37:17 +00:00
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Added LUFA into the project, right now just for some demo stuff.
2011-12-10 06:11:31 +00:00
<listOptionValue builtIn="false" value="USB_DEVICE_ONLY"/>
<listOptionValue builtIn="false" value="F_USB=16000000"/>
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<listOptionValue builtIn="false" value="ORDERED_EP_CONFIG"/>
<listOptionValue builtIn="false" value="FIXED_CONTROL_ENDPOINT_SIZE=8"/>
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<listOptionValue builtIn="false" value="USE_STATIC_OPTIONS=&quot;(USB_DEVICE_OPT_FULLSPEED | USB_OPT_REG_ENABLED | USB_OPT_AUTO_PLL)&quot;"/>
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I got the device identification working, and I'm in the middle of breaking it into its own set of functions for write cycles, read cycles, unlock sequence, etc.
2011-12-11 02:40:30 +00:00
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Break out code into a HAL, optimize flash operations This makes the code pretty easily portable to other architectures if someone wants to make a more modern SIMM programmer. I also was pretty careful to split responsibilities of the different components and give the existing components better names. I'm pretty happy with the organization of the code now. As part of this change I have also heavily optimized the code. In particular, the read and write cycle routines are very important to the overall performance of the programmer. In these routines I had to make some tradeoffs of code performance versus prettiness, but the overall result is much faster programming. Some of these performance changes are the result of what I discovered when I upgraded my AVR compiler. I discovered that it is smarter at looking at 32-bit variables when I use a union instead of bitwise operations. I also shaved off more CPU cycles by carefully making a few small tweaks. I added a bypass for the "program only some chips" mask, because it was adding unnecessary CPU cycles for a feature that is rarely used. I removed the verification feature from the write routine, because we can always verify the data after the write chunk is complete, which is more efficient. I also added assumptions about the initial/final state of the CS/OE/WE pins, which allowed me to remove more valuable CPU cycles from the read/write cycle routines. There are also a few enormous performance optimizations I should have done a long time ago: 1) The code was only handling one received byte per main loop iteration. Reading every byte available cut nearly a minute off of the 8 MB programming time. 2) The code wasn't taking advantage of the faster programming command available in the chips used on the 8 MB SIMM. The end result of all of these optimizations is I have programming time of the 8 MB SIMM down to 3:31 (it used to be 8:43). Another minor issue I fixed: the Micron SIMM chip identification wasn't working properly. It was outputting the manufacturer ID again instead of the device ID.
2020-11-18 05:03:32 +00:00
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<listOptionValue builtIn="false" value="&quot;${workspace_loc:/SIMMProgrammer/hal/at90usb646}&quot;"/>
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Started writing more command handling
2011-12-11 16:35:53 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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OK -- so I separated the actual port code from the external memory controller code. I think this makes more sense. It does add some complexity to the code. I may be going through a chain of calls just to turn the CS pin on, for instance. Hopefully I'm not going too crazy with this. Anyway, this means that I can control the ports from a SIMM electrical test routine using the same types of functions that the actual programming controlling code would use, without having to duplicate a bunch of port definitions and bit manipulation. I made sure to add all the functions I can think of needing to the ports module. We'll see if I got them all!
2011-11-27 08:01:29 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Added LUFA into the project, right now just for some demo stuff.
2011-12-10 06:11:31 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
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Ignore local settings files. Get project compiling on my computer.
2020-11-14 23:37:17 +00:00
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Break out code into a HAL, optimize flash operations This makes the code pretty easily portable to other architectures if someone wants to make a more modern SIMM programmer. I also was pretty careful to split responsibilities of the different components and give the existing components better names. I'm pretty happy with the organization of the code now. As part of this change I have also heavily optimized the code. In particular, the read and write cycle routines are very important to the overall performance of the programmer. In these routines I had to make some tradeoffs of code performance versus prettiness, but the overall result is much faster programming. Some of these performance changes are the result of what I discovered when I upgraded my AVR compiler. I discovered that it is smarter at looking at 32-bit variables when I use a union instead of bitwise operations. I also shaved off more CPU cycles by carefully making a few small tweaks. I added a bypass for the "program only some chips" mask, because it was adding unnecessary CPU cycles for a feature that is rarely used. I removed the verification feature from the write routine, because we can always verify the data after the write chunk is complete, which is more efficient. I also added assumptions about the initial/final state of the CS/OE/WE pins, which allowed me to remove more valuable CPU cycles from the read/write cycle routines. There are also a few enormous performance optimizations I should have done a long time ago: 1) The code was only handling one received byte per main loop iteration. Reading every byte available cut nearly a minute off of the 8 MB programming time. 2) The code wasn't taking advantage of the faster programming command available in the chips used on the 8 MB SIMM. The end result of all of these optimizations is I have programming time of the 8 MB SIMM down to 3:31 (it used to be 8:43). Another minor issue I fixed: the Micron SIMM chip identification wasn't working properly. It was outputting the manufacturer ID again instead of the device ID.
2020-11-18 05:03:32 +00:00
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Ignore local settings files. Get project compiling on my computer.
2020-11-14 23:37:17 +00:00
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Break out code into a HAL, optimize flash operations This makes the code pretty easily portable to other architectures if someone wants to make a more modern SIMM programmer. I also was pretty careful to split responsibilities of the different components and give the existing components better names. I'm pretty happy with the organization of the code now. As part of this change I have also heavily optimized the code. In particular, the read and write cycle routines are very important to the overall performance of the programmer. In these routines I had to make some tradeoffs of code performance versus prettiness, but the overall result is much faster programming. Some of these performance changes are the result of what I discovered when I upgraded my AVR compiler. I discovered that it is smarter at looking at 32-bit variables when I use a union instead of bitwise operations. I also shaved off more CPU cycles by carefully making a few small tweaks. I added a bypass for the "program only some chips" mask, because it was adding unnecessary CPU cycles for a feature that is rarely used. I removed the verification feature from the write routine, because we can always verify the data after the write chunk is complete, which is more efficient. I also added assumptions about the initial/final state of the CS/OE/WE pins, which allowed me to remove more valuable CPU cycles from the read/write cycle routines. There are also a few enormous performance optimizations I should have done a long time ago: 1) The code was only handling one received byte per main loop iteration. Reading every byte available cut nearly a minute off of the 8 MB programming time. 2) The code wasn't taking advantage of the faster programming command available in the chips used on the 8 MB SIMM. The end result of all of these optimizations is I have programming time of the 8 MB SIMM down to 3:31 (it used to be 8:43). Another minor issue I fixed: the Micron SIMM chip identification wasn't working properly. It was outputting the manufacturer ID again instead of the device ID.
2020-11-18 05:03:32 +00:00
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Ignore local settings files. Get project compiling on my computer.
2020-11-14 23:37:17 +00:00
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Break out code into a HAL, optimize flash operations This makes the code pretty easily portable to other architectures if someone wants to make a more modern SIMM programmer. I also was pretty careful to split responsibilities of the different components and give the existing components better names. I'm pretty happy with the organization of the code now. As part of this change I have also heavily optimized the code. In particular, the read and write cycle routines are very important to the overall performance of the programmer. In these routines I had to make some tradeoffs of code performance versus prettiness, but the overall result is much faster programming. Some of these performance changes are the result of what I discovered when I upgraded my AVR compiler. I discovered that it is smarter at looking at 32-bit variables when I use a union instead of bitwise operations. I also shaved off more CPU cycles by carefully making a few small tweaks. I added a bypass for the "program only some chips" mask, because it was adding unnecessary CPU cycles for a feature that is rarely used. I removed the verification feature from the write routine, because we can always verify the data after the write chunk is complete, which is more efficient. I also added assumptions about the initial/final state of the CS/OE/WE pins, which allowed me to remove more valuable CPU cycles from the read/write cycle routines. There are also a few enormous performance optimizations I should have done a long time ago: 1) The code was only handling one received byte per main loop iteration. Reading every byte available cut nearly a minute off of the 8 MB programming time. 2) The code wasn't taking advantage of the faster programming command available in the chips used on the 8 MB SIMM. The end result of all of these optimizations is I have programming time of the 8 MB SIMM down to 3:31 (it used to be 8:43). Another minor issue I fixed: the Micron SIMM chip identification wasn't working properly. It was outputting the manufacturer ID again instead of the device ID.
2020-11-18 05:03:32 +00:00
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Initial import of my test code for the SIMM programmer board. Right now it contains an (untested) MCP23S17 driver complete with AVR SPI support, and an (untested) external memory interface driver that uses it.
2011-11-26 07:10:30 +00:00
</cproject>
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