nanogui: Setting up TouchScreen for AT91SAM9261-EK
Subject:
RE: [nanogui] Setting up TouchScreen for AT91SAM9261-EK
From:
"Kelvin Xu" ####@####.####
Date:
23 Jan 2007 16:16:18 +0000
Message-Id: <BAY117-F76A156C6B604F6E297222BFAD0@phx.gbl>
Hi,
I try searching through the forums but did find any answers.
I have tried using the ADSMOUSE but it returned the following error
continously:
Wrong number of bytes 0 read from touch panel (expected 6)
I also tried using ADS7846MOUSE but it returned the following error for each
tap on the screen:
Wrong number of bytes 8 read from touch panel (expected 16)
I tried adding a new driver to the config, following the instructions in
moc_touchscreen.c
Below is the header file for my touchscreen driver:
/*
* drivers/input/touchscreen/at91_ads7843e_ts.h
*
* Definitions for ADS7843E touch screen.
* Copyright (C) 2005, M. Amine SAYA, ATMEL Rousset, France.
*
*/
#ifndef _AT91_ADS7843E_TS_H
#define _AT91_ADS7843E_TS_H
#define PWR_MODE_ACTIVE 0
#define PWR_MODE_SUSPEND 1
#define PEN_UP 2
#define PEN_DOWN 3
#define X_AXIS_MAX 3830
#define X_AXIS_MIN 150
#define Y_AXIS_MAX 3830
#define Y_AXIS_MIN 190
#define PRESSURE_MIN 0
#define PRESSURE_MAX 15000
/* ADS784X Touch Screen Controller Controll Byte bit definitions */
#define ADS_CTRL_PD0 (1 << 0) /* PD0 */
#define ADS_CTRL_PD1 (1 << 1) /* PD1 */
#define ADS_CTRL_DFR (1 << 2) /* SER/DFR */
#define ADS_CTRL_EIGHT_BITS_MOD (1 << 3) /* Mode */
#define ADS_CTRL_START (1 << 7) /* Start Bit */
#define ADS_CTRL_SWITCH_SHIFT 4 /* Address setting */
struct ts_event {
short pressure;
short x;
short y;
};
struct ts_device {
char phys[32];
int irq;
struct input_dev input;
struct work_struct work;
struct ts_event tc;
int pendown;
int power_mode;
};
// SPI transfer function
extern unsigned long at91_tsc_spi_sendrecv(unsigned char);
extern void at91sam9261_clear_irq(unsigned int);
#endif /* _AT91_ADS7843E_TS_H*/
I tried commenting out, to go round the compilation error of not define
input and work
struct input_dev input;
struct work_struct work;
The console reporting the following error continously when i touched on the
screen
Wrong number of bytes 0 read from touch panel (expected 6).
Thank you for all help granted.
Regardsm
Kelvin
>From: "Kelvin Xu" ####@####.####
>To: ####@####.####
>Subject: [nanogui] Setting up TouchScreen for AT91SAM9261-EK
>Date: Fri, 19 Jan 2007 16:14:35 +0800
>
>Hi,
>
>I am running Nano-X on ATMEL AT91SAM9261-EK board.
>I am wondering how to set up the touchscreen my board. Below is the
>initialisation of my Linux kernel on the board:
>
>mice: PS/2 mouse device common for all mice
>ts: Compaq touchscreen protocol output
>input: SAM926x Touchscreen as /class/input/input1
>ts ts.0: AT91SAM9261 Touch Screen Registered
>
>There is a /dev/ts0 entry in my RFS.
>
>I attempted to set up the Nano-X config with ADSMOUSE=Y. However, it report
>the following error:
>mou_touchscreen.c:50:2: error: #error "You didn't define a device for the
>generic touchscreen driver"
>
>Otherwise, the compilation completes. But i am unable to get any response
>from the demos on the screen.
>
>Regards,
>Kelvin
>
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