RTEMS  5.1
disp_hcms29xx.h
1 /*===============================================================*\
2 | Project: display driver for HCMS29xx |
3 +-----------------------------------------------------------------+
4 | File: disp_hcms29xx.h |
5 +-----------------------------------------------------------------+
6 | Copyright (c) 2008 |
7 | Embedded Brains GmbH |
8 | Obere Lagerstr. 30 |
9 | D-82178 Puchheim |
10 | Germany |
11 | rtems@embedded-brains.de |
12 +-----------------------------------------------------------------+
13 | The license and distribution terms for this file may be |
14 | found in the file LICENSE in this distribution or at |
15 | http://www.rtems.org/license/LICENSE. |
16 +-----------------------------------------------------------------+
17 | this file declares the SPI based driver for a HCMS29xx 4 digit |
18 | alphanumeric LED display |
19 \*===============================================================*/
20 
21 #ifndef _DISP_HCMS29XX_H
22 #define _DISP_HCMS29XX_H
23 #include <rtems.h>
24 #include <time.h>
25 
26 #ifdef __cplusplus
27 extern "C" {
28 #endif
29 #define DISP_HCMS29XX_TEXT_CNT (128)
30 
31  typedef struct {
32  rtems_device_minor_number minor; /* minor device number */
33  /*
34  * in the disp_buffer, the string to be displayed is placed
35  */
36  char disp_buffer[DISP_HCMS29XX_TEXT_CNT];
37  int disp_buf_cnt; /* number of valid chars in disp_buffer */
38  /*
39  * in the trns buffer the string is transfered to display task
40  */
41  char trns_buffer[DISP_HCMS29XX_TEXT_CNT];
42  /*
43  * in the dev_buffer, characters will be accumulated before display...
44  */
45  char dev_buffer[DISP_HCMS29XX_TEXT_CNT];
46  int dev_buf_cnt; /* number of valid chars in dev_buffer */
47 
48  rtems_id trns_sema_id; /* ID of disp trns buffer sema */
49  rtems_id task_id; /* ID of disp task */
50  bool rotate; /* FLAG: display is upside down */
51  } spi_disp_hcms29xx_param_t;
52 
53  typedef struct {
54  rtems_libi2c_drv_t libi2c_drv_entry;
55  spi_disp_hcms29xx_param_t disp_param;
56  } disp_hcms29xx_drv_t;
57  /*
58  * pass this descriptor pointer to rtems_libi2c_register_drv
59  */
60  extern rtems_libi2c_drv_t *disp_hcms29xx_driver_descriptor;
61 
62 /*=========================================================================*\
63 | Function: |
64 \*-------------------------------------------------------------------------*/
65 rtems_device_driver disp_hcms29xx_dev_initialize
66  (
67 /*-------------------------------------------------------------------------*\
68 | Purpose: |
69 | prepare the display device driver to accept write calls |
70 | register device with its name |
71 +---------------------------------------------------------------------------+
72 | Input Parameters: |
73 \*-------------------------------------------------------------------------*/
74  rtems_device_major_number major,
75  rtems_device_minor_number minor,
76  void *arg
77  );
78 /*-------------------------------------------------------------------------*\
79 | Return Value: |
80 | rtems_status_code |
81 \*=========================================================================*/
82 
83 /*=========================================================================*\
84 | Function: |
85 \*-------------------------------------------------------------------------*/
86 rtems_device_driver disp_hcms29xx_dev_open
87 (
88 /*-------------------------------------------------------------------------*\
89 | Purpose: |
90 | open the display device |
91 +---------------------------------------------------------------------------+
92 | Input Parameters: |
93 \*-------------------------------------------------------------------------*/
94  rtems_device_major_number major,
95  rtems_device_minor_number minor,
96  void *arg
97  );
98 /*-------------------------------------------------------------------------*\
99 | Return Value: |
100 | rtems_status_code |
101 \*=========================================================================*/
102 
103 /*=========================================================================*\
104 | Function: |
105 \*-------------------------------------------------------------------------*/
106 rtems_device_driver disp_hcms29xx_dev_write
107 (
108 /*-------------------------------------------------------------------------*\
109 | Purpose: |
110 | write to display device |
111 +---------------------------------------------------------------------------+
112 | Input Parameters: |
113 \*-------------------------------------------------------------------------*/
114  rtems_device_major_number major,
115  rtems_device_minor_number minor,
116  void *arg
117  );
118 /*-------------------------------------------------------------------------*\
119 | Return Value: |
120 | rtems_status_code |
121 \*=========================================================================*/
122 
123 /*=========================================================================*\
124 | Function: |
125 \*-------------------------------------------------------------------------*/
126 rtems_device_driver disp_hcms29xx_dev_close
127 (
128 /*-------------------------------------------------------------------------*\
129 | Purpose: |
130 | close the display device |
131 +---------------------------------------------------------------------------+
132 | Input Parameters: |
133 \*-------------------------------------------------------------------------*/
134  rtems_device_major_number major,
135  rtems_device_minor_number minor,
136  void *arg
137  );
138 /*-------------------------------------------------------------------------*\
139 | Return Value: |
140 | rtems_status_code |
141 \*=========================================================================*/
142 
143 #define DISP_HCMS29XX_DRIVER { \
144  disp_hcms29xx_dev_initialize, \
145  disp_hcms29xx_dev_open, \
146  NULL, \
147  disp_hcms29xx_dev_write, \
148  NULL, \
149  disp_hcms29xx_dev_close}
150 
151 
152 #ifdef __cplusplus
153 }
154 #endif
155 
156 #endif /* _DISP_HCMS29XX_H */
rtems_status_code
rtems_status_code
Classic API Status.
Definition: status.h:43
disp_hcms29xx_drv_t
Definition: disp_hcms29xx.h:53
spi_disp_hcms29xx_param_t
Definition: disp_hcms29xx.h:31
rtems_libi2c_drv_t_
Definition: libi2c.h:296
rtems_id
Objects_Id rtems_id
Used to manage and manipulate RTEMS object identifiers.
Definition: types.h:83
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