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adjustment for the Ondio: I2C clock is on a different pin

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git-svn-id: svn://svn.rockbox.org/rockbox/trunk@5054 a1c6a512-1295-4272-9138-f99709370657
This commit is contained in:
Jörg Hohensohn 2004-09-10 07:24:00 +00:00
parent d5c293a525
commit 6c1afd7a9e
3 changed files with 31 additions and 14 deletions
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31
firmware/drivers/i2c.c
View file

@ -23,23 +23,29 @@
#include "debug.h"
#include "system.h"
/*
** SDA is PB7
** SCL is PB13
*/
/* cute little functions, atomic read-modify-write */
/* SDA is PB7 */
#define SDA_LO and_b(~0x80, &PBDRL)
#define SDA_HI or_b(0x80, &PBDRL)
#define SDA_INPUT and_b(~0x80, &PBIORL)
#define SDA_OUTPUT or_b(0x80, &PBIORL)
#define SDA (PBDR & 0x80)
#ifdef HAVE_ONDIO_I2C
/* Ondio pinout, SCL moved to PB6 */
#define SCL_INPUT and_b(~0x40, &PBIORL)
#define SCL_OUTPUT or_b(0x40, &PBIORL)
#define SCL_LO and_b(~0x40, &PBDRL)
#define SCL_HI or_b(0x40, &PBDRL)
#define SCL (PBDR & 0x0040)
#else
/* "classic" pinout, SCL is PB13 */
#define SCL_INPUT and_b(~0x20, &PBIORH)
#define SCL_OUTPUT or_b(0x20, &PBIORH)
#define SCL_LO and_b(~0x20, &PBDRH)
#define SCL_HI or_b(0x20, &PBDRH)
#define SCL (PBDR & 0x2000)
#endif
/* arbitrary delay loop */
#define DELAY do { int _x; for(_x=0;_x<20;_x++);} while (0)
@ -78,17 +84,22 @@ void i2c_init(void)
{
int i;
#ifdef HAVE_ONDIO_I2C
/* make PB5, PB6 & PB7 general I/O */
PBCR2 &= ~0xfc00; /* includes PB5, see FIXME below */
#else
/* make PB5, PB7 & PB13 general I/O */
PBCR1 &= ~0x0c00; /* PB13 */
PBCR2 &= ~0xcc00; /* PB5 abd PB7 */
PBCR2 &= ~0xcc00; /* PB5 and PB7, see FIXME below */
#endif
/* PB5 is "MAS enable". make it output and high */
/* PB5 is "MAS enable" (no I2C signal!). make it output and high */
/* FIXME: this is true only for Players, and should go into mas.c */
/* for Recorders, it shuts off the charger, for FM/V2 it holds power */
or_b(0x20, &PBIORL);
or_b(0x20, &PBDRL);
/* Set the clock line PB13 to an output */
or_b(0x20, &PBIORH);
SCL_OUTPUT;
SDA_OUTPUT;
SDA_HI;
SCL_LO;

7
firmware/export/config-ondiofm.h
View file

@ -28,8 +28,8 @@
/* Define this to the CPU frequency */
#define CPU_FREQ 12000000
/* Battery scale factor (guessed, seems to be 1,25 * value from recorder) */
#define BATTERY_SCALE_FACTOR 8081 /* don't know yet */
/* Battery scale factor (measured from Jörg's FM) */
#define BATTERY_SCALE_FACTOR 4785 /* 4.890V read as 0x3FE */
/* Define this if you control power on PB5 (instead of the OFF button) */
#define HAVE_POWEROFF_ON_PB5 /* don't know yet */
@ -61,3 +61,6 @@
/* Define this if the display is mounted upside down */
#define HAVE_DISPLAY_FLIPPED
/* Define this for different I2C pinout */
#define HAVE_ONDIO_I2C

7
firmware/export/config-ondiosp.h
View file

@ -28,8 +28,8 @@
/* Define this to the CPU frequency */
#define CPU_FREQ 12000000
/* Battery scale factor (guessed, seems to be 1,25 * value from recorder) */
#define BATTERY_SCALE_FACTOR 8081 /* don't know yet */
/* Battery scale factor (measured from Jörg's FM) */
#define BATTERY_SCALE_FACTOR 4785 /* 4.890V read as 0x3FE */
/* Define this if you control power on PB5 (instead of the OFF button) */
#define HAVE_POWEROFF_ON_PB5 /* don't know yet */
@ -61,3 +61,6 @@
/* Define this if the display is mounted upside down */
#define HAVE_DISPLAY_FLIPPED
/* Define this for different I2C pinout */
#define HAVE_ONDIO_I2C