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annotate gsm-fw/bsp/timer.c @ 660:a0014ba30d71

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gsm-fw/cdg/makecdg.sh: added some comments
author Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
date Fri, 26 Sep 2014 00:34:44 +0000
parents afceeeb2cba1
children
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1 /*******************************************************************************
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2 TEXAS INSTRUMENTS INCORPORATED PROPRIETARY INFORMATION
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3
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4 Property of Texas Instruments -- For Unrestricted Internal Use Only
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5 Unauthorized reproduction and/or distribution is strictly prohibited. This
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6 product is protected under copyright law and trade secret law as an
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7 unpublished work. Created 1987, (C) Copyright 1997 Texas Instruments. All
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8 rights reserved.
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9
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10
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11 Filename : timer.c
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12
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13 Description : timer.c
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14
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15 Project : drivers
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16
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17 Author : pmonteil@tif.ti.com Patrice Monteil.
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18
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19 Version number : 1.3
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20
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21 Date and time : 07/23/98 16:25:32
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22 Previous delta : 07/23/98 16:25:32
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23
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24 SCCS file : /db/gsm_asp/db_ht96/dsp_0/gsw/rel_0/mcu_l1/release1.5/mod/emu/EMU_MCMP/eva3_drivers/source/SCCS/s.timer.c
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25
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26 Sccs Id (SID) : '@(#) timer.c 1.3 07/23/98 16:25:32 '
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27
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28
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29 *****************************************************************************/
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30
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31 #include "../include/sys_types.h"
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32
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33 #include "mem.h"
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34 #include "iq.h"
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35 #include "timer.h"
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36
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37
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38 /*--------------------------------------------------------------
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39 * TIMER_Read()
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40 *--------------------------------------------------------------
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41 * Parameters : num of the register to be read
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42 * Return :value of the timer register read
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43 * Functionality : read one of the TIMER register
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44 *--------------------------------------------------------------*/
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45 SYS_UWORD16 TIMER_Read (unsigned short regNum)
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46 {
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47 SYS_UWORD16 timerReg;
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48
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49 switch (regNum) {
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50 case 0:
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51 timerReg = ( * (volatile SYS_UWORD16 *) TIMER_CNTL_REG) & TIMER_CNTL_MASK;
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52 break;
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53 case 1:
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54 timerReg = *(volatile SYS_UWORD16 *) TIMER_READ_REG;
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55 break;
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56 case 2:
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57 timerReg = ( * (volatile SYS_UWORD16 *) TIMER_MODE_REG) & TIMER_MODE_MASK;
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58 break;
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59 default:
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60 break;
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61 }
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62 return(timerReg);
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63 }
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64 /*--------------------------------------------------------------
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65 * TM_ResetTimer()
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66 *--------------------------------------------------------------
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67 * Parameters : timer number (1 or 2)
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68 * timer value, reload yes or not, scale
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69 * Return : none
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70 * Functionality : Give the timewr state
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71 *--------------------------------------------------------------*/
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72 void TM_ResetTimer (SYS_UWORD16 timerNum, SYS_UWORD16 countValue,
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73 SYS_UWORD16 autoReload, SYS_UWORD16 clockScale)
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74 {
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75 volatile SYS_UWORD16 *cntl;
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76
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77 if (timerNum == 1)
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78 {
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79 cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
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80
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81 *cntl &= ~(START_STOP | PTV); /* stop and reset values */
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82
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83 (autoReload) ? (*cntl |= AR) : (*cntl &= ~AR);
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84
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85 *cntl |= (clockScale << 2 );
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86
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87 /*load the value */
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88 *(volatile SYS_UWORD16 *) TIMER1_LOAD_TIM = countValue;
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89
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90 *cntl |= START_STOP;
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91 }
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92 else
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93 {
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94 cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
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95
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96 *cntl &= ~(START_STOP | PTV); /* stop and reset values */
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97
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98 (autoReload) ? (*cntl |= AR) : (*cntl &= ~AR);
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99
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100 *cntl |= (clockScale << 2 );
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101
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102 /*load the value */
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103 *(volatile SYS_UWORD16 *) TIMER2_LOAD_TIM = countValue;
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104
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105 *cntl |= START_STOP;
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106 }
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107 }
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108
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109 /*
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110 * TM_StopTimer
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111 *
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112 * Parameters : timer number (1 or 2)
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113 */
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114 void TM_StopTimer (int timerNum)
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115 {
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116 volatile SYS_UWORD16 *cntl;
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117
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118 if (timerNum == 1)
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119 {
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120 cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
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121 }
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122 else
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123 {
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124 cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
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125 }
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126 *cntl &= ~START_STOP;
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127 }
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128
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129 /*
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130 * TM_ReadTimer
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131 *
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132 * Returns current timer value
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133 *
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134 * Parameters : timer number (1 or 2)
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diff changeset
135 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
136 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
137 SYS_UWORD16 TM_ReadTimer (int timerNum)
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diff changeset
138 {
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parents:
diff changeset
139 if (timerNum == 1)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
140 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
141 return (* (SYS_UWORD16 *) TIMER1_READ_TIM);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
142 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
143 else
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
144 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
145 return (* (SYS_UWORD16 *) TIMER2_READ_TIM);
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parents:
diff changeset
146 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
147 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
148
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diff changeset
149
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
150 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
151 * TM_StartTimer
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
152 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
153 * Parameters : timer number (1 or 2)
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parents:
diff changeset
154 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
155 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
156 void TM_StartTimer (int timerNum)
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diff changeset
157 {
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diff changeset
158 volatile SYS_UWORD16 *cntl;
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parents:
diff changeset
159
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
160 if (timerNum == 1)
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parents:
diff changeset
161 {
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162 cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
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diff changeset
163 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
164 else
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
165 {
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166 cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
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diff changeset
167 }
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168 *cntl |= START_STOP;
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diff changeset
169 }
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diff changeset
170
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
171 void TM_DisableWatchdog (void)
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172 {
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173 /* volatile variable needed due C to optimization */
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parents:
diff changeset
174 volatile SYS_UWORD16 *reg = (volatile SYS_UWORD16 *) TIMER_MODE_REG;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
175
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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176 *reg = 0xf5;
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177 *reg = 0xa0;
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178 }
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diff changeset
179
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diff changeset
180
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
181 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
182 * TM_EnableWatchdog
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diff changeset
183 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
184 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
185 void TM_EnableWatchdog(void)
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186 {
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187 * ((volatile SYS_UWORD16 *) TIMER_MODE_REG) = TIMER_WDOG;
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parents:
diff changeset
188 }
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parents:
diff changeset
189
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
190 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
191 * TM_ResetWatchdog
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
192 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
193 * Parameter : Tick count
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parents:
diff changeset
194 * Use a different value each time, otherwise watchdog bites
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diff changeset
195 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
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diff changeset
196 void TM_ResetWatchdog(SYS_UWORD16 count)
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diff changeset
197 {
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198 * ((volatile SYS_UWORD16 *) TIMER_LOAD_REG) = count;
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parents:
diff changeset
199 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
200
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
201 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
202 * TM_EnableTimer (int TimerNum)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
203 *
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parents:
diff changeset
204 * Parameter : TimerNum : timer to enable (timer1 or timer2)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
205 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
206 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
207 void TM_EnableTimer (int TimerNum)
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parents:
diff changeset
208 {
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parents:
diff changeset
209 volatile SYS_UWORD16 *cntl;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
210
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
211 if (TimerNum == 1)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
212 {
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parents:
diff changeset
213 cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
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parents:
diff changeset
214 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
215 else
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
216 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
217 cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
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parents:
diff changeset
218 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
219 *cntl |= TIMER_CLK_EN;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
220 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
221
17b0511b243c nuc-fw: continuing lowest-level BSP integration
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
222 /*
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
223 * TM_DisableTimer (int TimerNum)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
224 *
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parents:
diff changeset
225 * Parameter : TimerNum : timer to enable (timer1 or timer2)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
226 *
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
227 */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
228 void TM_DisableTimer (int TimerNum)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
229 {
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parents:
diff changeset
230 volatile SYS_UWORD16 *cntl;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
231
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
232 if (TimerNum == 1)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
233 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
234 cntl = (volatile SYS_UWORD16 *) TIMER1_CNTL;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
235 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
236 else
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
237 {
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parents:
diff changeset
238 cntl = (volatile SYS_UWORD16 *) TIMER2_CNTL;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
239 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
240 *cntl &= ~TIMER_CLK_EN;
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
241 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
242
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
243 /*--------------------------------------------------------------
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
244 * TIMER_ReadValue()
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
245 *--------------------------------------------------------------
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
246 * Parameters : none
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
247 * Return : none
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
248 * Functionality : Read timer value
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
249 *--------------------------------------------------------------*/
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
250
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
251 unsigned short TIMER_ReadValue (void)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
252 {
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
253 return(* (SYS_UWORD16 *) TIMER_READ_REG);
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
254 }
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
255
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
256 /*--------------------------------------------------------------
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
257 * TIMER_WriteValue()
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
258 *--------------------------------------------------------------
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
259 * Parameters : none
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
260 * Return : none
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
261 * Functionality : Write timer value
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
262 *--------------------------------------------------------------*/
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
263
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
264 void TIMER_WriteValue (SYS_UWORD16 value)
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
265 {
17b0511b243c nuc-fw: continuing lowest-level BSP integration
Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
266 * (SYS_UWORD16 *) TIMER_LOAD_REG = value; /*load the value */
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Michael Spacefalcon <msokolov@ivan.Harhan.ORG>
parents:
diff changeset
267 }