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[freertos] / Demo / Flshlite / ParTest / ParTest.c
1 /*\r
2     FreeRTOS V6.1.0 - Copyright (C) 2010 Real Time Engineers Ltd.\r
3 \r
4     ***************************************************************************\r
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23     ***************************************************************************\r
24 \r
25     This file is part of the FreeRTOS distribution.\r
26 \r
27     FreeRTOS is free software; you can redistribute it and/or modify it under\r
28     the terms of the GNU General Public License (version 2) as published by the\r
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49 \r
50     http://www.OpenRTOS.com - Commercial support, development, porting,\r
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52 */\r
53 \r
54 /*\r
55 Changes from V1.01:\r
56 \r
57         + Types used updated.\r
58         + Add vParTestToggleLED();\r
59 \r
60 Changes from V2.0.0\r
61 \r
62         + Use scheduler suspends in place of critical sections.\r
63 */\r
64 \r
65 \r
66 #include "FreeRTOS.h"\r
67 #include "task.h"\r
68 #include "partest.h"\r
69 \r
70 #define partstALL_OUTPUTS_OFF                   ( ( unsigned short) 0x00 )\r
71 #define partstMAX_OUTPUT_LED                    ( ( unsigned char ) 7 )\r
72 #define partstPORT_F_ADDR                               ( ( unsigned short ) 0x605 )\r
73 #define partstPORT_DIRECTION_REG                ( ( unsigned short ) 0x606 )\r
74 #define partstPORT_F_DIR_BIT                    ( ( unsigned short ) 0x20 )\r
75 \r
76 /*lint -e956 File scope parameters okay here. */\r
77 static volatile unsigned char ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
78 /*lint +e956 */\r
79 \r
80 /*-----------------------------------------------------------\r
81  * Simple parallel port IO routines.\r
82  *-----------------------------------------------------------*/\r
83 \r
84 void vParTestInitialise( void )\r
85 {\r
86 unsigned short usInput;\r
87 \r
88         ucCurrentOutputValue = partstALL_OUTPUTS_OFF;\r
89 \r
90         /* Set the direction to output for port F. */\r
91         usInput = portINPUT_BYTE( partstPORT_DIRECTION_REG );\r
92         usInput |= partstPORT_F_DIR_BIT;\r
93         portOUTPUT_BYTE( partstPORT_DIRECTION_REG, usInput );\r
94 \r
95         /* Start with all outputs off. */\r
96         portOUTPUT_BYTE( partstPORT_F_ADDR, partstALL_OUTPUTS_OFF );\r
97 }\r
98 /*-----------------------------------------------------------*/\r
99 \r
100 void vParTestSetLED( unsigned portBASE_TYPE uxLED, portBASE_TYPE xValue )\r
101 {\r
102 unsigned char ucBit = ( unsigned char ) 1;\r
103 \r
104         if( uxLED <= partstMAX_OUTPUT_LED )\r
105         {\r
106                 ucBit <<= uxLED;\r
107         }       \r
108 \r
109         vTaskSuspendAll();\r
110         {\r
111                 if( xValue == pdTRUE )\r
112                 {\r
113                         ucBit ^= ( unsigned char ) 0xff;\r
114                         ucCurrentOutputValue &= ucBit;\r
115                 }\r
116                 else\r
117                 {\r
118                         ucCurrentOutputValue |= ucBit;\r
119                 }\r
120 \r
121                 portOUTPUT_BYTE( partstPORT_F_ADDR, ( unsigned ) ucCurrentOutputValue );\r
122         }\r
123         xTaskResumeAll();\r
124 }\r
125 /*-----------------------------------------------------------*/\r
126 \r
127 void vParTestToggleLED( unsigned portBASE_TYPE uxLED )\r
128 {\r
129 unsigned char ucBit;\r
130 \r
131         if( uxLED <= partstMAX_OUTPUT_LED )\r
132         {\r
133                 ucBit = ( ( unsigned char ) 1 ) << uxLED;\r
134 \r
135                 vTaskSuspendAll();\r
136                 {\r
137                         if( ucCurrentOutputValue & ucBit )\r
138                         {\r
139                                 ucCurrentOutputValue &= ~ucBit;\r
140                         }\r
141                         else\r
142                         {\r
143                                 ucCurrentOutputValue |= ucBit;\r
144                         }\r
145 \r
146                         portOUTPUT_BYTE( partstPORT_F_ADDR, ( unsigned ) ucCurrentOutputValue );\r
147                 }\r
148                 xTaskResumeAll();                       \r
149         }\r
150 }\r
151 \r