1 // Copyright (c) 2017, Tobias Mueller tm(at)tm3d.de
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2 // All rights reserved.
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4 // Redistribution and use in source and binary forms, with or without
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5 // modification, are permitted provided that the following conditions are
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8 // * Redistributions of source code must retain the above copyright
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9 // notice, this list of conditions and the following disclaimer.
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10 // * Redistributions in binary form must reproduce the above copyright
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11 // notice, this list of conditions and the following disclaimer in the
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12 // documentation and/or other materials provided with the
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14 // * All advertising materials mentioning features or use of this
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15 // software must display the following acknowledgement: This product
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16 // includes software developed by tm3d.de and its contributors.
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17 // * Neither the name of tm3d.de nor the names of its contributors may
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18 // be used to endorse or promote products derived from this software
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19 // without specific prior written permission.
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21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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34 .global TIMER_INTERRUPT
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38 in r_temp,_SFR_IO_ADDR(SREG)
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42 sbic OW_PIN,OW_PINN ; abkuerzung wenn Leitung schon h
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43 rjmp tint_end ; Leitung 1 kein Reset
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47 ldi r_temp2,3 ;3x overrun for timeout
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49 JMP_NO_TOV ;ueberspringe wenn kein ueberlauf
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50 rjmp tint_handle_timeout
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51 sbis OW_PIN,OW_PINN ;warten bis leitung wieder h
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53 ;JMP_NO_TOV ;ueberspringe wenn kein ueberlauf
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57 in r_temp,TCNT_REG ;schauen ob es lange genug gedauert hat fuer reset
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58 cpi r_temp,OWT_RESET2
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63 ;zwischen Reset und Presets
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66 cpi r_temp,OWT_RESET_PRESENT
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67 brlo tint_loop_res_pres ;Warten zwischen reset und presets
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68 sbi OW_DDR,OW_PINN ;presents impuls
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72 cpi r_temp,OWT_PRESENT
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75 ldi r_temp,OW_READ_ROM_COMMAND ; Initialisieren von Rom command
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78 sts reset_indicator,r_temp
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79 sts bcount,r_temp ;bit eins
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81 sts sendflag,r_temp ;empfangen (rom_command)
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82 ;sts wzero,r_temp ;alles 0
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84 CLEAR_INTERRUPT_FLAG
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86 ;CLEAR_INTERRUPT_FLAG
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90 out _SFR_IO_ADDR(SREG),r_temp
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95 tint_handle_timeout:
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