FreeCalypso > hg > fc-magnetite
view src/cs/drivers/drv_app/r2d/uwire.h @ 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 | b8fc86826624 |
children |
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/** @file: uwire.h @author Davide Carpegna @version 1.0 Purpose: Driver for the uwire HD module */ /* Date Modification ------------------------------------ 09/22/2000 Create 10/18/2001 Updated for R2D by Christophe Favergeon (C) Copyright 2000 by Texas Instruments Incorporated, All Rights Reserved */ #ifndef _UWIRE_H_ #define _UWIRE_H_ #define MEM_UWIRE 0xFFFE4000 #define TDR (MEM_UWIRE) #define RDR (MEM_UWIRE) #define CSR (MEM_UWIRE+0x02) #define SR1 (MEM_UWIRE+0x04) #define SR2 (MEM_UWIRE+0x06) #define SR3 (MEM_UWIRE+0x08) #define INDEX_CS1 (1 << 10) #define NB_BITS_WR_8 (1 << 8 ) #define INDEX_CS0 0 #define NB_BITS_WR_9 (9 << 5) #define CS_CMD (1 << 12) #define START (1 << 13) #define CS1_EDGE_RD (1 << 6) #define CS1_FRQ_FINT_4 (1 << 9) #define CS0_FRQ_FINT_2 0 #define CS0_FRQ_FINT_4 (1 << 3) #define SR3_CLK_EN 1 #define CSRB ( 1<<14 ) #define IO_SEL0 0xFFFEF008 #define IO_SEL 0xFFFEF00A #define GPIO_INOUT 0xFFFE4804 #define GPIO_OUT 0xFFFE4802 #define CNTL_RST 0xFFFFFD04 #ifdef _WINDOWS #ifdef __cplusplus extern "C" { #endif #endif // prototypes of uwire functions for lcd BOOLEAN lcd_polling(void); void lcd_transmit_cmd(UINT8 cmd); void uwire_init_lcd(void); // Defined only for board void lcd_transmit_data(UINT8 data); // Defined only for PC void lcd_refresh(void); void lcd_set_pos(unsigned char x,unsigned char y); void* lcd_get_dc(void); #ifdef _WINDOWS #ifdef __cplusplus } #endif #endif #endif /*_UWIRE_H_*/