comparison src/cs/drivers/drv_core/armio/armio.c @ 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 0cbe7438f974
children b639f7ab0007
comparison
equal deleted inserted replaced
628:38a65c3a96af 629:3231dd9b38c1
293 AI_ConfigBitAsOutput(5); 293 AI_ConfigBitAsOutput(5);
294 #if defined(CONFIG_TARGET_GTAMODEM) || defined(CONFIG_TARGET_FCFAM) 294 #if defined(CONFIG_TARGET_GTAMODEM) || defined(CONFIG_TARGET_FCFAM)
295 AI_ConfigBitAsOutput(6); 295 AI_ConfigBitAsOutput(6);
296 #endif 296 #endif
297 AI_ConfigBitAsOutput(7); 297 AI_ConfigBitAsOutput(7);
298 #if defined(CONFIG_TARGET_GTAMODEM) || defined(CONFIG_TARGET_FCFAM) 298 #if 1 /* FreeCalypso addition for all targets */
299 AI_ConfigBitAsOutput(8); 299 AI_ConfigBitAsOutput(8);
300 #endif 300 #endif
301 AI_ConfigBitAsOutput(9); 301 AI_ConfigBitAsOutput(9);
302 #ifdef CONFIG_TARGET_GTAMODEM 302 #ifdef CONFIG_TARGET_GTAMODEM
303 AI_ConfigBitAsOutput(10); 303 AI_ConfigBitAsOutput(10);
304 AI_ConfigBitAsOutput(11); 304 AI_ConfigBitAsOutput(11);
305 AI_ConfigBitAsOutput(12); 305 AI_ConfigBitAsOutput(12);
306 #endif 306 #endif
307 #if defined(CONFIG_TARGET_GTAMODEM) || defined(CONFIG_TARGET_FCFAM) 307 #if 1 /* FreeCalypso addition for all targets */
308 AI_ConfigBitAsOutput(13); 308 AI_ConfigBitAsOutput(13);
309 #endif 309 #endif
310 AI_ConfigBitAsOutput(14); 310 AI_ConfigBitAsOutput(14);
311 AI_ConfigBitAsOutput(15); 311 AI_ConfigBitAsOutput(15);
312 #endif 312 #endif