1 | -- |
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2 | -- Timer_Driver / Specification |
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3 | -- |
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4 | -- Description: |
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5 | -- |
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6 | -- This package is the specification for the Timer Driver. |
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7 | -- |
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8 | -- Dependencies: |
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9 | -- |
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10 | -- |
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11 | -- |
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12 | -- COPYRIGHT (c) 1989-1997. |
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13 | -- On-Line Applications Research Corporation (OAR). |
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14 | -- Copyright assigned to U.S. Government, 1994. |
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15 | -- |
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16 | -- The license and distribution terms for this file may in |
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17 | -- the file LICENSE in this distribution or at |
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18 | -- http://www.OARcorp.com/rtems/license.html. |
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19 | -- |
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20 | -- $Id$ |
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21 | -- |
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22 | |
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23 | with RTEMS; |
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24 | |
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25 | package Timer_Driver is |
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26 | |
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27 | -- |
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28 | -- Initialize |
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29 | -- |
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30 | -- Description: |
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31 | -- |
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32 | -- This subprogram initializes the hardware timer to start it. |
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33 | -- |
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34 | |
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35 | procedure Initialize; |
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36 | pragma Import (C, Initialize, "Timer_initialize"); |
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37 | |
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38 | -- |
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39 | -- Read_Timer |
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40 | -- |
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41 | -- Description: |
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42 | -- |
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43 | -- This subprogram stops the timer, calculates the length of time |
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44 | -- in microseconds since the timer was started, and returns that |
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45 | -- value. |
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46 | -- |
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47 | |
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48 | function Read_Timer |
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49 | return RTEMS.Unsigned32; |
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50 | pragma Import (C, Read_Timer, "Read_timer"); |
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51 | |
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52 | -- |
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53 | -- Empty_Function |
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54 | -- |
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55 | -- Description: |
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56 | -- |
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57 | -- This subprogram is an empty subprogram. It is used to |
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58 | -- insure that a loop will be included in the final executable |
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59 | -- so that loop overhead can be subtracted from the directive |
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60 | -- times reported. |
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61 | -- |
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62 | |
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63 | procedure Empty_Function; |
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64 | pragma Import (C, Empty_Function, "Empty_function"); |
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65 | |
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66 | -- |
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67 | -- Set_Find_Average_Overhead |
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68 | -- |
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69 | -- Description: |
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70 | -- |
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71 | -- This subprogram sets the Find_Average_Overhead flag to the |
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72 | -- the value passed. |
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73 | -- |
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74 | |
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75 | procedure Set_Find_Average_Overhead ( |
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76 | Find_Flag : in Standard.Boolean |
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77 | ); |
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78 | |
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79 | private |
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80 | |
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81 | end Timer_Driver; |
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