Comments on: Maple Prototype Details and Mailing List http://leaflabs.com/2009/08/maple-prototype-details-and-mailing-list/ Mon, 26 Jul 2010 23:03:57 +0000 http://wordpress.org/?v=2.9.2 hourly 1 By: Al http://leaflabs.com/2009/08/maple-prototype-details-and-mailing-list/comment-page-1/#comment-46 Al Sun, 06 Sep 2009 12:41:28 +0000 http://blogs.leaflabs.com/?p=111#comment-46 Are you using just ports A and C for the Arduino ports (PC0-5 for analog,PCA0-13 + PC6,7 for digital ports. That would maximize the other ports for alternate usage. The reason I ask is because we are working on something related with stm32x and Arduino backward compatibility, I'm sure we could benefit from co-operation as our project is also OpenSource. Al regards Al Are you using just ports A and C for the Arduino ports (PC0-5 for analog,PCA0-13 + PC6,7 for digital ports. That would maximize the other ports for alternate usage.

The reason I ask is because we are working on something related with stm32x and Arduino backward compatibility, I’m sure we could benefit from co-operation as our project is also OpenSource.
Al
regards
Al

]]> By: okie http://leaflabs.com/2009/08/maple-prototype-details-and-mailing-list/comment-page-1/#comment-45 okie Wed, 02 Sep 2009 06:52:56 +0000 http://blogs.leaflabs.com/?p=111#comment-45 May I ask what you're thinking about using a timer accurate to nanoseconds for? Sounds yummy. May I ask what you’re thinking about using a timer accurate to nanoseconds for? Sounds yummy.

]]> By: poslathian http://leaflabs.com/2009/08/maple-prototype-details-and-mailing-list/comment-page-1/#comment-44 poslathian Mon, 31 Aug 2009 19:22:43 +0000 http://blogs.leaflabs.com/?p=111#comment-44 Those numbers were typos. The current board equips the stm32f103rbt6, with 128KB flash program memory and 20KB of on die SRAM. We intend to offer all flavors of the stmf103x, which reach 512KB of flash and 64KB SRAM memories. We also have a handful of 105's around the office which might make an appearance on some flavor of Maple. Thanks for pointing out the error! Those numbers were typos. The current board equips the stm32f103rbt6, with 128KB flash program memory and 20KB of on die SRAM. We intend to offer all flavors of the stmf103x, which reach 512KB of flash and 64KB SRAM memories. We also have a handful of 105’s around the office which might make an appearance on some flavor of Maple. Thanks for pointing out the error!

]]> By: theWibbler http://leaflabs.com/2009/08/maple-prototype-details-and-mailing-list/comment-page-1/#comment-43 theWibbler Sun, 30 Aug 2009 10:37:13 +0000 http://blogs.leaflabs.com/?p=111#comment-43 I assume you mean STM32F107RC, which has 256KB flash and 64K RAM, or do you mean that there is 8KB RAM left once the USB and Ethernet are working? I assume you mean STM32F107RC, which has 256KB flash and 64K RAM, or do you mean that there is 8KB RAM left once the USB and Ethernet are working?

]]> By: bbradlyn http://leaflabs.com/2009/08/maple-prototype-details-and-mailing-list/comment-page-1/#comment-42 bbradlyn Fri, 28 Aug 2009 16:54:04 +0000 http://blogs.leaflabs.com/?p=111#comment-42 well, since the clock on the Cortex runs at 72MHz, the highest resolution you can get is approximately 1/(72MHz), or about 15ns. There might be some fancy tricks you can play to get this down by a factor of two or so, but not down to single nanosecond precision. Keep in mind, this is assuming you do nothing else with the processor but look at the clock well, since the clock on the Cortex runs at 72MHz, the highest resolution you can get is approximately 1/(72MHz), or about 15ns. There might be some fancy tricks you can play to get this down by a factor of two or so, but not down to single nanosecond precision. Keep in mind, this is assuming you do nothing else with the processor but look at the clock

]]> By: Mo http://leaflabs.com/2009/08/maple-prototype-details-and-mailing-list/comment-page-1/#comment-41 Mo Thu, 27 Aug 2009 15:50:58 +0000 http://blogs.leaflabs.com/?p=111#comment-41 Could this be used to create a timer accurate to nanoseconds? Could this be used to create a timer accurate to nanoseconds?

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