FreeCalypso > hg > fc-magnetite
view LICENSE @ 629:3231dd9b38c1
armio.c: make GPIOs 8 & 13 outputs driving 1 on all "classic" targets
Calypso GPIOs 8 & 13 are pinmuxed with MCUEN1 & MCUEN2, respectively,
and on powerup these pins are MCUEN, i.e., outputs driving 1. TI's code
for C-Sample and earlier turns them into GPIOs configured as outputs also
driving 1 - so far, so good - but TI's code for BOARD 41 (which covers
D-Sample, Leonardo and all real world Calypso devices derived from the
latter) switches them from MCUEN to GPIOs, but then leaves them as inputs.
Given that the hardware powerup state of these two pins is outputs driving 1,
every Calypso board design MUST be compatible with such driving; typically
these GPIO signals will be either unused and unconnected or connected as
outputs driving some peripheral. Turning these pins into GPIO inputs will
result in floating inputs on every reasonably-wired board, thus I am
convinced that this configuration is nothing but a bug on the part of
whoever wrote this code at TI.
This floating input bug had already been fixed earlier for GTA modem and
FCDEV3B targets; the present change makes the fix unconditional for all
"classic" targets. The newly affected targets are D-Sample, Leonardo,
Tango and GTM900.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Thu, 02 Jan 2020 05:38:26 +0000 |
| parents | 6f0874b00973 |
| children | 8c74c177e914 |
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FreeCalypso original work ========================= The present FreeCalypso firmware is a derived work based on TI's TCS211 and TCS3.2 firmwares. However, even though it is based on these two starting points from TI, our FreeCalypso fw is a software product in its own right, and is NOT merely a "hacked" copy of some TI firmware. The particular way in which we have combined and integrated pieces from TCS211 and from TCS3.2 to produce our TCS2/TCS3 hybrid, our meticulous source reconstruction of TCS211 L1 that originally came in binary object form, our completely new and original firmware configuration and build system, all of our new code that supports new board- level hardware targets that use TI chips but aren't TI's historical development boards, and all other significant new developments made in FreeCalypso constitute our own original work. All original work in FreeCalypso that is not directly traceable to some historical TI code component has been written by Mother Mychaela Nadezhda Falconia, and I refuse to claim copyright on this software work. I hereby immediately place this work in the public domain; it may be used, copied, distorted or destroyed in any manner whatsoever without further attribution or notice to the creator. Code pieces from TI =================== In the case of those code components which originate from TI, we did not get them *from* TI per se, instead we have found them freely on the Internet. I, Mother Mychaela, have made multiple attempts to reach out to TI, informing them about the existence of our FreeCalypso family of projects and what I am doing with their old abandoned software IP. I was not able to get any positive response from them in the form of support or help with obtaining those pieces of historical code and documentation which are still missing, but they have not taken any adverse action against us either; specifically, they never said explicitly that they object to what I am doing (producing and freely distributing my own Derived Works based on their abandonware IP), and they never asked me to stop doing so. Based on the fact that TI have chosen to not take any action against our family of projects despite being fully informed and having been given multiple opportunities to do so over the course of many years, we hereby make the reasonable conclusion that TI do not object to us using their fully abandoned and discontinued IP as if it were Free Software, and I, Mother Mychaela, shall continue doing the same for as long as I am alive and physically able.