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|
/*===============================================================*\
| Project: display driver for HCMS29xx |
+-----------------------------------------------------------------+
| File: disp_hcms29xx.h |
+-----------------------------------------------------------------+
| Copyright (c) 2008 |
| Embedded Brains GmbH |
| Obere Lagerstr. 30 |
| D-82178 Puchheim |
| Germany |
| rtems@embedded-brains.de |
+-----------------------------------------------------------------+
| The license and distribution terms for this file may be |
| found in the file LICENSE in this distribution or at |
| http://www.rtems.org/license/LICENSE. |
+-----------------------------------------------------------------+
| this file declares the SPI based driver for a HCMS29xx 4 digit |
| alphanumeric LED display |
\*===============================================================*/
#ifndef _DISP_HCMS29XX_H
#define _DISP_HCMS29XX_H
#include <rtems.h>
#include <time.h>
#ifdef __cplusplus
extern "C" {
#endif
#define DISP_HCMS29XX_TEXT_CNT (128)
typedef struct {
rtems_device_minor_number minor; /* minor device number */
/*
* in the disp_buffer, the string to be displayed is placed
*/
char disp_buffer[DISP_HCMS29XX_TEXT_CNT];
int disp_buf_cnt; /* number of valid chars in disp_buffer */
/*
* in the trns buffer the string is transfered to display task
*/
char trns_buffer[DISP_HCMS29XX_TEXT_CNT];
/*
* in the dev_buffer, characters will be accumulated before display...
*/
char dev_buffer[DISP_HCMS29XX_TEXT_CNT];
int dev_buf_cnt; /* number of valid chars in dev_buffer */
rtems_id trns_sema_id; /* ID of disp trns buffer sema */
rtems_id task_id; /* ID of disp task */
bool rotate; /* FLAG: display is upside down */
} spi_disp_hcms29xx_param_t;
typedef struct {
rtems_libi2c_drv_t libi2c_drv_entry;
spi_disp_hcms29xx_param_t disp_param;
} disp_hcms29xx_drv_t;
/*
* pass this descriptor pointer to rtems_libi2c_register_drv
*/
extern rtems_libi2c_drv_t *disp_hcms29xx_driver_descriptor;
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_device_driver disp_hcms29xx_dev_initialize
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| prepare the display device driver to accept write calls |
| register device with its name |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_device_driver disp_hcms29xx_dev_open
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| open the display device |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_device_driver disp_hcms29xx_dev_write
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| write to display device |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
/*=========================================================================*\
| Function: |
\*-------------------------------------------------------------------------*/
rtems_device_driver disp_hcms29xx_dev_close
(
/*-------------------------------------------------------------------------*\
| Purpose: |
| close the display device |
+---------------------------------------------------------------------------+
| Input Parameters: |
\*-------------------------------------------------------------------------*/
rtems_device_major_number major,
rtems_device_minor_number minor,
void *arg
);
/*-------------------------------------------------------------------------*\
| Return Value: |
| rtems_status_code |
\*=========================================================================*/
#define DISP_HCMS29XX_DRIVER { \
disp_hcms29xx_dev_initialize, \
disp_hcms29xx_dev_open, \
NULL, \
disp_hcms29xx_dev_write, \
NULL, \
disp_hcms29xx_dev_close}
#ifdef __cplusplus
}
#endif
#endif /* _DISP_HCMS29XX_H */
|
