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view src/cs/drivers/drv_app/spi/spi_process.h @ 629:3231dd9b38c1

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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 945cf7f506b2
children
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/*****************************************************************************/
/*                                                                           */
/*  Name       spi_process.h                                                 */
/*                                                                           */
/*  Function    this file contains the spi_process function prototype,       */
/*				used to handle messages received in the SPI task mailbox.    */
/*                                                                           */
/*  Version    0.1                                                           */
/*                                                                           */
/*  Date       Modification                                                  */
/*  ------------------------------------                                     */
/*                                                                           */
/* Author      Candice Bazanegue                                             */
/*                                                                           */
/* (C) Copyright 2000 by Texas Instruments Incorporated, All Rights Reserved */
/*****************************************************************************/

#ifndef __SPI_PROCESS_H__
#define __SPI_PROCESS_H__


#define SPI_ABB_READ_EVT            1
#define SPI_ABB_WRITE_EVT           2
#define SPI_ABB_CONF_ADC_EVT        3
#define SPI_ABB_READ_ADC_EVT        4
#define ABB_EXT_IRQ_EVT             5

/* Prototypes */

/*******************************************************************************
** Function         spi_process
**
** Description     It is called by the spi task core to handle the access to                                         
**                 the ABB through the SPI in a non-preemptive way.        
**
*******************************************************************************/
UINT8 spi_process(T_RV_HDR * msg_ptr);

#endif /* __SPI_PROCESS_H__ */