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| GAS LISTING /tmp/ccZHfAgR.s page 1 |
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| |
| 1 .file "I2CInterface.c" |
| 2 .arch atmega8 |
| 3 __SREG__ = 0x3f |
| 4 __SP_H__ = 0x3e |
| 5 __SP_L__ = 0x3d |
| 6 __tmp_reg__ = 0 |
| 7 __zero_reg__ = 1 |
| 8 .global __do_copy_data |
| 9 .global __do_clear_bss |
| 10 .stabs "/home/kaklik/projects/programy/Atmel_C/AVRcam/",100,0,2,.Ltext0 |
| 11 .stabs "I2CInterface.c",100,0,2,.Ltext0 |
| 12 .text |
| 13 .Ltext0: |
| 14 .stabs "gcc2_compiled.",60,0,0,0 |
| 15 .stabs "int:t(0,1)=r(0,1);-32768;32767;",128,0,0,0 |
| 16 .stabs "char:t(0,2)=@s8;r(0,2);0;255;",128,0,0,0 |
| 17 .stabs "long int:t(0,3)=@s32;r(0,3);020000000000;017777777777;",128,0,0,0 |
| 18 .stabs "unsigned int:t(0,4)=r(0,4);0;0177777;",128,0,0,0 |
| 19 .stabs "long unsigned int:t(0,5)=@s32;r(0,5);0;037777777777;",128,0,0,0 |
| 20 .stabs "long long int:t(0,6)=@s64;r(0,6);01000000000000000000000;0777777777777777777777;",128,0,0, |
| 21 .stabs "long long unsigned int:t(0,7)=@s64;r(0,7);0;01777777777777777777777;",128,0,0,0 |
| 22 .stabs "short int:t(0,8)=r(0,8);-32768;32767;",128,0,0,0 |
| 23 .stabs "short unsigned int:t(0,9)=r(0,9);0;0177777;",128,0,0,0 |
| 24 .stabs "signed char:t(0,10)=@s8;r(0,10);-128;127;",128,0,0,0 |
| 25 .stabs "unsigned char:t(0,11)=@s8;r(0,11);0;255;",128,0,0,0 |
| 26 .stabs "float:t(0,12)=r(0,1);4;0;",128,0,0,0 |
| 27 .stabs "double:t(0,13)=r(0,1);4;0;",128,0,0,0 |
| 28 .stabs "long double:t(0,14)=r(0,1);4;0;",128,0,0,0 |
| 29 .stabs "void:t(0,15)=(0,15)",128,0,0,0 |
| 30 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/avr/io.h",130,0,0,0 |
| 31 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/avr/sfr_defs.h",130,0,0,0 |
| 32 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/inttypes.h",130,0,0,0 |
| 33 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/stdint.h",130,0,0,0 |
| 34 .stabs "int8_t:t(4,1)=(0,10)",128,0,116,0 |
| 35 .stabs "uint8_t:t(4,2)=(0,11)",128,0,117,0 |
| 36 .stabs "int16_t:t(4,3)=(0,1)",128,0,118,0 |
| 37 .stabs "uint16_t:t(4,4)=(0,4)",128,0,119,0 |
| 38 .stabs "int32_t:t(4,5)=(0,3)",128,0,120,0 |
| 39 .stabs "uint32_t:t(4,6)=(0,5)",128,0,121,0 |
| 40 .stabs "int64_t:t(4,7)=(0,6)",128,0,122,0 |
| 41 .stabs "uint64_t:t(4,8)=(0,7)",128,0,123,0 |
| 42 .stabs "intptr_t:t(4,9)=(4,3)",128,0,135,0 |
| 43 .stabs "uintptr_t:t(4,10)=(4,4)",128,0,140,0 |
| 44 .stabs "int_least8_t:t(4,11)=(4,1)",128,0,152,0 |
| 45 .stabs "uint_least8_t:t(4,12)=(4,2)",128,0,157,0 |
| 46 .stabs "int_least16_t:t(4,13)=(4,3)",128,0,162,0 |
| 47 .stabs "uint_least16_t:t(4,14)=(4,4)",128,0,167,0 |
| 48 .stabs "int_least32_t:t(4,15)=(4,5)",128,0,172,0 |
| 49 .stabs "uint_least32_t:t(4,16)=(4,6)",128,0,177,0 |
| 50 .stabs "int_least64_t:t(4,17)=(4,7)",128,0,182,0 |
| 51 .stabs "uint_least64_t:t(4,18)=(4,8)",128,0,187,0 |
| 52 .stabs "int_fast8_t:t(4,19)=(4,1)",128,0,200,0 |
| 53 .stabs "uint_fast8_t:t(4,20)=(4,2)",128,0,205,0 |
| 54 .stabs "int_fast16_t:t(4,21)=(4,3)",128,0,210,0 |
| 55 .stabs "uint_fast16_t:t(4,22)=(4,4)",128,0,215,0 |
| 56 .stabs "int_fast32_t:t(4,23)=(4,5)",128,0,220,0 |
| 57 .stabs "uint_fast32_t:t(4,24)=(4,6)",128,0,225,0 |
| GAS LISTING /tmp/ccZHfAgR.s page 2 |
| |
| |
| 58 .stabs "int_fast64_t:t(4,25)=(4,7)",128,0,230,0 |
| 59 .stabs "uint_fast64_t:t(4,26)=(4,8)",128,0,235,0 |
| 60 .stabs "intmax_t:t(4,27)=(4,7)",128,0,249,0 |
| 61 .stabs "uintmax_t:t(4,28)=(4,8)",128,0,254,0 |
| 62 .stabn 162,0,0,0 |
| 63 .stabs "int_farptr_t:t(3,1)=(4,5)",128,0,76,0 |
| 64 .stabs "uint_farptr_t:t(3,2)=(4,6)",128,0,80,0 |
| 65 .stabn 162,0,0,0 |
| 66 .stabn 162,0,0,0 |
| 67 .stabn 162,0,0,0 |
| 68 .stabs "CamConfig.h",130,0,0,0 |
| 69 .stabs "I2CInterface.h",130,0,0,0 |
| 70 .stabs "CommonDefs.h",130,0,0,0 |
| 71 .stabs "bool_t:t(7,1)=(0,11)",128,0,56,0 |
| 72 .stabn 162,0,0,0 |
| 73 .stabs "i2cCmd_t:t(6,1)=(6,2)=s2configReg:(0,11),0,8;data:(0,11),8,8;;",128,0,53,0 |
| 74 .stabn 162,0,0,0 |
| 75 .stabn 162,0,0,0 |
| 76 .stabs "I2CInt_init:F(0,15)",36,0,85,I2CInt_init |
| 77 .global I2CInt_init |
| 78 .type I2CInt_init, @function |
| 79 I2CInt_init: |
| 80 .stabd 46,0,0 |
| 1:I2CInterface.c **** /* |
| 2:I2CInterface.c **** Copyright (C) 2004 John Orlando |
| 3:I2CInterface.c **** |
| 4:I2CInterface.c **** AVRcam: a small real-time image processing engine. |
| 5:I2CInterface.c **** |
| 6:I2CInterface.c **** This program is free software; you can redistribute it and/or |
| 7:I2CInterface.c **** modify it under the terms of the GNU General Public |
| 8:I2CInterface.c **** License as published by the Free Software Foundation; either |
| 9:I2CInterface.c **** version 2 of the License, or (at your option) any later version. |
| 10:I2CInterface.c **** |
| 11:I2CInterface.c **** This program is distributed in the hope that it will be useful, |
| 12:I2CInterface.c **** but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13:I2CInterface.c **** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 14:I2CInterface.c **** General Public License for more details. |
| 15:I2CInterface.c **** |
| 16:I2CInterface.c **** You should have received a copy of the GNU General Public |
| 17:I2CInterface.c **** License along with this program; if not, write to the Free Software |
| 18:I2CInterface.c **** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19:I2CInterface.c **** |
| 20:I2CInterface.c **** For more information on the AVRcam, please contact: |
| 21:I2CInterface.c **** |
| 22:I2CInterface.c **** john@jrobot.net |
| 23:I2CInterface.c **** |
| 24:I2CInterface.c **** or go to www.jrobot.net for more details regarding the system. |
| 25:I2CInterface.c **** */ |
| 26:I2CInterface.c **** /*********************************************************** |
| 27:I2CInterface.c **** Module Name: I2CInterface.c |
| 28:I2CInterface.c **** Module Date: 4/10/2004 |
| 29:I2CInterface.c **** Module Auth: John Orlando |
| 30:I2CInterface.c **** |
| 31:I2CInterface.c **** Description: This module is responsible for providing a |
| 32:I2CInterface.c **** low-level interface to the I2C hardware resident on the |
| 33:I2CInterface.c **** mega8 processor (also known as the Two-Wire Interface, |
| 34:I2CInterface.c **** or TWI). The interface is needed to configure the |
| GAS LISTING /tmp/ccZHfAgR.s page 3 |
| |
| |
| 35:I2CInterface.c **** needed registers in the OV6620 camera. This interface |
| 36:I2CInterface.c **** is interrupt-driven based on the events that should |
| 37:I2CInterface.c **** occur upon successful writing of an I2C register. |
| 38:I2CInterface.c **** |
| 39:I2CInterface.c **** Revision History: |
| 40:I2CInterface.c **** Date Rel Ver. Notes |
| 41:I2CInterface.c **** 4/10/2004 0.1 Module created |
| 42:I2CInterface.c **** 6/30/2004 1.0 Initial release for Circuit Cellar |
| 43:I2CInterface.c **** contest. |
| 44:I2CInterface.c **** |
| 45:I2CInterface.c **** ***********************************************************/ |
| 46:I2CInterface.c **** |
| 47:I2CInterface.c **** /* Includes */ |
| 48:I2CInterface.c **** #include <avr/io.h> |
| 49:I2CInterface.c **** #include <util/twi.h> |
| 50:I2CInterface.c **** #include <avr/interrupt.h> |
| 51:I2CInterface.c **** #include "CamConfig.h" |
| 52:I2CInterface.c **** #include "CommonDefs.h" |
| 53:I2CInterface.c **** |
| 54:I2CInterface.c **** /* Local Variables */ |
| 55:I2CInterface.c **** |
| 56:I2CInterface.c **** /* These variables are used as storage space for the current |
| 57:I2CInterface.c **** I2C command being sent over the interface. They need to |
| 58:I2CInterface.c **** be volatile since they are dealt with an the TWI ISR */ |
| 59:I2CInterface.c **** volatile static unsigned char twi_address; |
| 60:I2CInterface.c **** volatile static unsigned char *twi_data; |
| 61:I2CInterface.c **** volatile static unsigned char twi_ddr; |
| 62:I2CInterface.c **** volatile static unsigned char twi_bytes; |
| 63:I2CInterface.c **** volatile static unsigned char status; |
| 64:I2CInterface.c **** volatile static unsigned char retry_cnt; |
| 65:I2CInterface.c **** |
| 66:I2CInterface.c **** /* Local Structures and Typedefs */ |
| 67:I2CInterface.c **** |
| 68:I2CInterface.c **** /* Extern Variables */ |
| 69:I2CInterface.c **** |
| 70:I2CInterface.c **** /* Definitions */ |
| 71:I2CInterface.c **** /* Bit definitions for the tw_status register */ |
| 72:I2CInterface.c **** #define MAX_TWI_RETRIES 2 |
| 73:I2CInterface.c **** #define BUSY 7 |
| 74:I2CInterface.c **** |
| 75:I2CInterface.c **** /*********************************************************** |
| 76:I2CInterface.c **** Function Name: I2CInt_init |
| 77:I2CInterface.c **** Function Description: This function is responsible |
| 78:I2CInterface.c **** for setting up the registers needed for the TWI |
| 79:I2CInterface.c **** interface |
| 80:I2CInterface.c **** |
| 81:I2CInterface.c **** Inputs: none |
| 82:I2CInterface.c **** Outputs: none |
| 83:I2CInterface.c **** ***********************************************************/ |
| 84:I2CInterface.c **** void I2CInt_init(void) |
| 85:I2CInterface.c **** { |
| 81 .stabn 68,0,85,.LM0-I2CInt_init |
| 82 .LM0: |
| 83 /* prologue: frame size=0 */ |
| 84 /* prologue end (size=0) */ |
| 86:I2CInterface.c **** TWSR = 0; |
| 85 .stabn 68,0,86,.LM1-I2CInt_init |
| GAS LISTING /tmp/ccZHfAgR.s page 4 |
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| |
| 86 .LM1: |
| 87 0000 11B8 out 33-0x20,__zero_reg__ |
| 87:I2CInterface.c **** |
| 88:I2CInterface.c **** /* init the speed of the I2C interface, running at |
| 89:I2CInterface.c **** 100 Kbps */ |
| 90:I2CInterface.c **** TWBR = (FOSC / I2C_SPEED - 16)/2; |
| 88 .stabn 68,0,90,.LM2-I2CInt_init |
| 89 .LM2: |
| 90 0002 88E4 ldi r24,lo8(72) |
| 91 0004 80B9 out 32-0x20,r24 |
| 92 /* epilogue: frame size=0 */ |
| 93 0006 0895 ret |
| 94 /* epilogue end (size=1) */ |
| 95 /* function I2CInt_init size 4 (3) */ |
| 96 .size I2CInt_init, .-I2CInt_init |
| 97 .Lscope0: |
| 98 .stabs "",36,0,0,.Lscope0-I2CInt_init |
| 99 .stabd 78,0,0 |
| 100 .stabs "I2CInt_writeData:F(0,15)",36,0,108,I2CInt_writeData |
| 101 .stabs "address:P(0,11)",64,0,107,25 |
| 102 .stabs "data:P(0,16)=*(0,11)",64,0,107,22 |
| 103 .stabs "bytes:P(0,11)",64,0,107,20 |
| 104 .global I2CInt_writeData |
| 105 .type I2CInt_writeData, @function |
| 106 I2CInt_writeData: |
| 107 .stabd 46,0,0 |
| 91:I2CInterface.c **** } |
| 92:I2CInterface.c **** |
| 93:I2CInterface.c **** /*********************************************************** |
| 94:I2CInterface.c **** Function Name: I2CInt_writeData |
| 95:I2CInterface.c **** Function Description: This function is responsible for |
| 96:I2CInterface.c **** initiating the process of writing a sequence of bytes |
| 97:I2CInterface.c **** an I2C slave address. This function will try to write |
| 98:I2CInterface.c **** the data three times before giving up. |
| 99:I2CInterface.c **** Inputs: address: the address of the I2C slave device |
| 100:I2CInterface.c **** data: a pointer to the data to be written |
| 101:I2CInterface.c **** to the slave...for camera interfacing, |
| 102:I2CInterface.c **** the data follows a <register #><data> |
| 103:I2CInterface.c **** format |
| 104:I2CInterface.c **** bytes: the number of bytes to write |
| 105:I2CInterface.c **** Outputs: none |
| 106:I2CInterface.c **** ***********************************************************/ |
| 107:I2CInterface.c **** void I2CInt_writeData(unsigned char address, unsigned char *data, unsigned char bytes) |
| 108:I2CInterface.c **** { |
| 108 .stabn 68,0,108,.LM3-I2CInt_writeData |
| 109 .LM3: |
| 110 /* prologue: frame size=0 */ |
| 111 /* prologue end (size=0) */ |
| 112 0008 982F mov r25,r24 |
| 113 .L5: |
| 109:I2CInterface.c **** while(status & (1<<BUSY)); /* Bus is busy wait (or exit with error code) */ |
| 114 .stabn 68,0,109,.LM4-I2CInt_writeData |
| 115 .LM4: |
| 116 000a 8091 0000 lds r24,status |
| 117 000e 8823 tst r24 |
| 118 0010 E4F3 brlt .L5 |
| 119 .L9: |
| GAS LISTING /tmp/ccZHfAgR.s page 5 |
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| |
| 110:I2CInterface.c **** while(TWCR & (1<<TWSTO)); |
| 120 .stabn 68,0,110,.LM5-I2CInt_writeData |
| 121 .LM5: |
| 122 0012 06B6 in __tmp_reg__,86-0x20 |
| 123 0014 04FC sbrc __tmp_reg__,4 |
| 124 0016 FDCF rjmp .L9 |
| 111:I2CInterface.c **** |
| 112:I2CInterface.c **** /* copy the needed data and state info to our local I2C command structure */ |
| 113:I2CInterface.c **** twi_address = address; |
| 125 .stabn 68,0,113,.LM6-I2CInt_writeData |
| 126 .LM6: |
| 127 0018 9093 0000 sts twi_address,r25 |
| 114:I2CInterface.c **** twi_data = data; |
| 128 .stabn 68,0,114,.LM7-I2CInt_writeData |
| 129 .LM7: |
| 130 001c 7093 0000 sts (twi_data)+1,r23 |
| 131 0020 6093 0000 sts twi_data,r22 |
| 115:I2CInterface.c **** twi_bytes = bytes; |
| 132 .stabn 68,0,115,.LM8-I2CInt_writeData |
| 133 .LM8: |
| 134 0024 4093 0000 sts twi_bytes,r20 |
| 116:I2CInterface.c **** twi_ddr = TW_WRITE; |
| 135 .stabn 68,0,116,.LM9-I2CInt_writeData |
| 136 .LM9: |
| 137 0028 1092 0000 sts twi_ddr,__zero_reg__ |
| 117:I2CInterface.c **** |
| 118:I2CInterface.c **** retry_cnt = 0; |
| 138 .stabn 68,0,118,.LM10-I2CInt_writeData |
| 139 .LM10: |
| 140 002c 1092 0000 sts retry_cnt,__zero_reg__ |
| 119:I2CInterface.c **** |
| 120:I2CInterface.c **** /* Generate start condition, the remainder of the transfer is interrupt driven and |
| 121:I2CInterface.c **** will be performed in the background */ |
| 122:I2CInterface.c **** TWCR = (1<<TWINT)|(1<<TWSTA)|(1<<TWEN)|(1<<TWIE); |
| 141 .stabn 68,0,122,.LM11-I2CInt_writeData |
| 142 .LM11: |
| 143 0030 85EA ldi r24,lo8(-91) |
| 144 0032 86BF out 86-0x20,r24 |
| 123:I2CInterface.c **** |
| 124:I2CInterface.c **** status |= (1<<BUSY); |
| 145 .stabn 68,0,124,.LM12-I2CInt_writeData |
| 146 .LM12: |
| 147 0034 8091 0000 lds r24,status |
| 148 0038 8068 ori r24,lo8(-128) |
| 149 003a 8093 0000 sts status,r24 |
| 150 /* epilogue: frame size=0 */ |
| 151 003e 0895 ret |
| 152 /* epilogue end (size=1) */ |
| 153 /* function I2CInt_writeData size 28 (27) */ |
| 154 .size I2CInt_writeData, .-I2CInt_writeData |
| 155 .Lscope1: |
| 156 .stabs "",36,0,0,.Lscope1-I2CInt_writeData |
| 157 .stabd 78,0,0 |
| 158 .stabs "I2CInt_readData:F(0,15)",36,0,138,I2CInt_readData |
| 159 .stabs "address:P(0,11)",64,0,137,25 |
| 160 .stabs "data:P(0,16)",64,0,137,22 |
| 161 .stabs "bytes:P(0,11)",64,0,137,20 |
| GAS LISTING /tmp/ccZHfAgR.s page 6 |
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| |
| 162 .global I2CInt_readData |
| 163 .type I2CInt_readData, @function |
| 164 I2CInt_readData: |
| 165 .stabd 46,0,0 |
| 125:I2CInterface.c **** } |
| 126:I2CInterface.c **** |
| 127:I2CInterface.c **** /*********************************************************** |
| 128:I2CInterface.c **** Function Name: I2CInt_readData |
| 129:I2CInterface.c **** Function Description: This funcion is responsible for |
| 130:I2CInterface.c **** reading the specified number of bytes from a slave |
| 131:I2CInterface.c **** device. |
| 132:I2CInterface.c **** Inputs: address: the slave address to read from |
| 133:I2CInterface.c **** data: a pointer to where the data will be stored |
| 134:I2CInterface.c **** bytes: the number of bytes to read |
| 135:I2CInterface.c **** Outputs: none |
| 136:I2CInterface.c **** ***********************************************************/ |
| 137:I2CInterface.c **** void I2CInt_readData(unsigned char address, unsigned char *data, unsigned char bytes) |
| 138:I2CInterface.c **** { |
| 166 .stabn 68,0,138,.LM13-I2CInt_readData |
| 167 .LM13: |
| 168 /* prologue: frame size=0 */ |
| 169 /* prologue end (size=0) */ |
| 170 0040 982F mov r25,r24 |
| 171 .L15: |
| 139:I2CInterface.c **** /* Bus is busy wait (or exit with error code) */ |
| 140:I2CInterface.c **** while(status & (1<<BUSY)); |
| 172 .stabn 68,0,140,.LM14-I2CInt_readData |
| 173 .LM14: |
| 174 0042 8091 0000 lds r24,status |
| 175 0046 8823 tst r24 |
| 176 0048 E4F3 brlt .L15 |
| 141:I2CInterface.c **** |
| 142:I2CInterface.c **** twi_address = address; |
| 177 .stabn 68,0,142,.LM15-I2CInt_readData |
| 178 .LM15: |
| 179 004a 9093 0000 sts twi_address,r25 |
| 143:I2CInterface.c **** twi_data = data; |
| 180 .stabn 68,0,143,.LM16-I2CInt_readData |
| 181 .LM16: |
| 182 004e 7093 0000 sts (twi_data)+1,r23 |
| 183 0052 6093 0000 sts twi_data,r22 |
| 144:I2CInterface.c **** twi_bytes = bytes; |
| 184 .stabn 68,0,144,.LM17-I2CInt_readData |
| 185 .LM17: |
| 186 0056 4093 0000 sts twi_bytes,r20 |
| 145:I2CInterface.c **** twi_ddr = TW_READ; |
| 187 .stabn 68,0,145,.LM18-I2CInt_readData |
| 188 .LM18: |
| 189 005a 81E0 ldi r24,lo8(1) |
| 190 005c 8093 0000 sts twi_ddr,r24 |
| 146:I2CInterface.c **** |
| 147:I2CInterface.c **** retry_cnt = 0; |
| 191 .stabn 68,0,147,.LM19-I2CInt_readData |
| 192 .LM19: |
| 193 0060 1092 0000 sts retry_cnt,__zero_reg__ |
| 148:I2CInterface.c **** |
| 149:I2CInterface.c **** /* Generate start condition, the remainder of the transfer is interrupt driven and |
| GAS LISTING /tmp/ccZHfAgR.s page 7 |
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| |
| 150:I2CInterface.c **** will be performed in the background */ |
| 151:I2CInterface.c **** TWCR = (1<<TWINT)|(1<<TWSTA)|(1<<TWEN)|(1<<TWIE); |
| 194 .stabn 68,0,151,.LM20-I2CInt_readData |
| 195 .LM20: |
| 196 0064 85EA ldi r24,lo8(-91) |
| 197 0066 86BF out 86-0x20,r24 |
| 152:I2CInterface.c **** |
| 153:I2CInterface.c **** status |= (1<<BUSY); |
| 198 .stabn 68,0,153,.LM21-I2CInt_readData |
| 199 .LM21: |
| 200 0068 8091 0000 lds r24,status |
| 201 006c 8068 ori r24,lo8(-128) |
| 202 006e 8093 0000 sts status,r24 |
| 203 /* epilogue: frame size=0 */ |
| 204 0072 0895 ret |
| 205 /* epilogue end (size=1) */ |
| 206 /* function I2CInt_readData size 26 (25) */ |
| 207 .size I2CInt_readData, .-I2CInt_readData |
| 208 .Lscope2: |
| 209 .stabs "",36,0,0,.Lscope2-I2CInt_readData |
| 210 .stabd 78,0,0 |
| 211 .stabs "I2CInt_isI2cBusy:F(7,1)",36,0,166,I2CInt_isI2cBusy |
| 212 .global I2CInt_isI2cBusy |
| 213 .type I2CInt_isI2cBusy, @function |
| 214 I2CInt_isI2cBusy: |
| 215 .stabd 46,0,0 |
| 154:I2CInterface.c **** } |
| 155:I2CInterface.c **** |
| 156:I2CInterface.c **** /*********************************************************** |
| 157:I2CInterface.c **** Function Name: I2CInt_isI2cBusy |
| 158:I2CInterface.c **** Function Description: This funcion is responsible for |
| 159:I2CInterface.c **** indicating if the I2C bus is currently busy to external |
| 160:I2CInterface.c **** modules. |
| 161:I2CInterface.c **** device. |
| 162:I2CInterface.c **** Inputs: none |
| 163:I2CInterface.c **** Outputs: bool_t - indicating if bus is busy |
| 164:I2CInterface.c **** ***********************************************************/ |
| 165:I2CInterface.c **** bool_t I2CInt_isI2cBusy(void) |
| 166:I2CInterface.c **** { |
| 216 .stabn 68,0,166,.LM22-I2CInt_isI2cBusy |
| 217 .LM22: |
| 218 /* prologue: frame size=0 */ |
| 219 /* prologue end (size=0) */ |
| 167:I2CInterface.c **** bool_t retVal = FALSE; |
| 168:I2CInterface.c **** if ( (status & (1<<BUSY)) != 0) |
| 220 .stabn 68,0,168,.LM23-I2CInt_isI2cBusy |
| 221 .LM23: |
| 222 0074 8091 0000 lds r24,status |
| 223 0078 881F rol r24 |
| 224 007a 8827 clr r24 |
| 225 007c 881F rol r24 |
| 169:I2CInterface.c **** { |
| 170:I2CInterface.c **** retVal = TRUE; |
| 171:I2CInterface.c **** } |
| 172:I2CInterface.c **** |
| 173:I2CInterface.c **** return(retVal); |
| 174:I2CInterface.c **** } |
| GAS LISTING /tmp/ccZHfAgR.s page 8 |
| |
| |
| 226 .stabn 68,0,174,.LM24-I2CInt_isI2cBusy |
| 227 .LM24: |
| 228 007e 9927 clr r25 |
| 229 /* epilogue: frame size=0 */ |
| 230 0080 0895 ret |
| 231 /* epilogue end (size=1) */ |
| 232 /* function I2CInt_isI2cBusy size 7 (6) */ |
| 233 .size I2CInt_isI2cBusy, .-I2CInt_isI2cBusy |
| 234 .Lscope3: |
| 235 .stabs "",36,0,0,.Lscope3-I2CInt_isI2cBusy |
| 236 .stabd 78,0,0 |
| 237 .stabs "__vector_17:F(0,15)",36,0,185,__vector_17 |
| 238 .global __vector_17 |
| 239 .type __vector_17, @function |
| 240 __vector_17: |
| 241 .stabd 46,0,0 |
| 175:I2CInterface.c **** |
| 176:I2CInterface.c **** /*********************************************************** |
| 177:I2CInterface.c **** Function Name: <interrupt handler for I2C> |
| 178:I2CInterface.c **** Function Description: This function is responsible for |
| 179:I2CInterface.c **** implementing the control logic needed to perform a |
| 180:I2CInterface.c **** read or write operation with an I2C slave. |
| 181:I2CInterface.c **** Inputs: none |
| 182:I2CInterface.c **** Outputs: none |
| 183:I2CInterface.c **** ***********************************************************/ |
| 184:I2CInterface.c **** SIGNAL(SIG_2WIRE_SERIAL) |
| 185:I2CInterface.c **** { |
| 242 .stabn 68,0,185,.LM25-__vector_17 |
| 243 .LM25: |
| 244 /* prologue: frame size=0 */ |
| 245 0082 1F92 push __zero_reg__ |
| 246 0084 0F92 push __tmp_reg__ |
| 247 0086 0FB6 in __tmp_reg__,__SREG__ |
| 248 0088 0F92 push __tmp_reg__ |
| 249 008a 1124 clr __zero_reg__ |
| 250 008c 8F93 push r24 |
| 251 008e 9F93 push r25 |
| 252 0090 AF93 push r26 |
| 253 0092 BF93 push r27 |
| 254 0094 EF93 push r30 |
| 255 0096 FF93 push r31 |
| 256 /* prologue end (size=11) */ |
| 186:I2CInterface.c **** unsigned char TWI_status = TWSR & TW_STATUS_MASK; /* grab just the status bits */ |
| 257 .stabn 68,0,186,.LM26-__vector_17 |
| 258 .LM26: |
| 259 0098 81B1 in r24,33-0x20 |
| 187:I2CInterface.c **** |
| 188:I2CInterface.c **** /* the entire I2C handler is state-based...determine |
| 189:I2CInterface.c **** what needs to be done based on TWI_status */ |
| 190:I2CInterface.c **** switch(TWI_status) |
| 260 .stabn 68,0,190,.LM27-__vector_17 |
| 261 .LM27: |
| 262 009a 9927 clr r25 |
| 263 009c AA27 clr r26 |
| 264 009e BB27 clr r27 |
| 265 00a0 887F andi r24,lo8(248) |
| 266 00a2 9070 andi r25,hi8(248) |
| GAS LISTING /tmp/ccZHfAgR.s page 9 |
| |
| |
| 267 00a4 A070 andi r26,hlo8(248) |
| 268 00a6 B070 andi r27,hhi8(248) |
| 269 00a8 FC01 movw r30,r24 |
| 270 00aa 3897 sbiw r30,8 |
| 271 00ac E135 cpi r30,81 |
| 272 00ae F105 cpc r31,__zero_reg__ |
| 273 00b0 08F0 brlo .+2 |
| 274 00b2 9AC0 rjmp .L42 |
| 275 .stabn 68,0,190,.LM28-__vector_17 |
| 276 .LM28: |
| 277 00b4 E050 subi r30,lo8(-(pm(.L33))) |
| 278 00b6 F040 sbci r31,hi8(-(pm(.L33))) |
| 279 00b8 0994 ijmp |
| 280 .data |
| 281 .section .progmem.gcc_sw_table, "ax", @progbits |
| 282 .p2align 1 |
| 283 .L33: |
| 284 .data |
| 285 .section .progmem.gcc_sw_table, "ax", @progbits |
| 286 .p2align 1 |
| 287 0000 00C0 rjmp .L25 |
| 288 0002 00C0 rjmp .L42 |
| 289 0004 00C0 rjmp .L42 |
| 290 0006 00C0 rjmp .L42 |
| 291 0008 00C0 rjmp .L42 |
| 292 000a 00C0 rjmp .L42 |
| 293 000c 00C0 rjmp .L42 |
| 294 000e 00C0 rjmp .L42 |
| 295 0010 00C0 rjmp .L25 |
| 296 0012 00C0 rjmp .L42 |
| 297 0014 00C0 rjmp .L42 |
| 298 0016 00C0 rjmp .L42 |
| 299 0018 00C0 rjmp .L42 |
| 300 001a 00C0 rjmp .L42 |
| 301 001c 00C0 rjmp .L42 |
| 302 001e 00C0 rjmp .L42 |
| 303 0020 00C0 rjmp .L26 |
| 304 0022 00C0 rjmp .L42 |
| 305 0024 00C0 rjmp .L42 |
| 306 0026 00C0 rjmp .L42 |
| 307 0028 00C0 rjmp .L42 |
| 308 002a 00C0 rjmp .L42 |
| 309 002c 00C0 rjmp .L42 |
| 310 002e 00C0 rjmp .L42 |
| 311 0030 00C0 rjmp .L27 |
| 312 0032 00C0 rjmp .L42 |
| 313 0034 00C0 rjmp .L42 |
| 314 0036 00C0 rjmp .L42 |
| 315 0038 00C0 rjmp .L42 |
| 316 003a 00C0 rjmp .L42 |
| 317 003c 00C0 rjmp .L42 |
| 318 003e 00C0 rjmp .L42 |
| 319 0040 00C0 rjmp .L28 |
| 320 0042 00C0 rjmp .L42 |
| 321 0044 00C0 rjmp .L42 |
| 322 0046 00C0 rjmp .L42 |
| 323 0048 00C0 rjmp .L42 |
| GAS LISTING /tmp/ccZHfAgR.s page 10 |
| |
| |
| 324 004a 00C0 rjmp .L42 |
| 325 004c 00C0 rjmp .L42 |
| 326 004e 00C0 rjmp .L42 |
| 327 0050 00C0 rjmp .L29 |
| 328 0052 00C0 rjmp .L42 |
| 329 0054 00C0 rjmp .L42 |
| 330 0056 00C0 rjmp .L42 |
| 331 0058 00C0 rjmp .L42 |
| 332 005a 00C0 rjmp .L42 |
| 333 005c 00C0 rjmp .L42 |
| 334 005e 00C0 rjmp .L42 |
| 335 0060 00C0 rjmp .L42 |
| 336 0062 00C0 rjmp .L42 |
| 337 0064 00C0 rjmp .L42 |
| 338 0066 00C0 rjmp .L42 |
| 339 0068 00C0 rjmp .L42 |
| 340 006a 00C0 rjmp .L42 |
| 341 006c 00C0 rjmp .L42 |
| 342 006e 00C0 rjmp .L42 |
| 343 0070 00C0 rjmp .L30 |
| 344 0072 00C0 rjmp .L42 |
| 345 0074 00C0 rjmp .L42 |
| 346 0076 00C0 rjmp .L42 |
| 347 0078 00C0 rjmp .L42 |
| 348 007a 00C0 rjmp .L42 |
| 349 007c 00C0 rjmp .L42 |
| 350 007e 00C0 rjmp .L42 |
| 351 0080 00C0 rjmp .L27 |
| 352 0082 00C0 rjmp .L42 |
| 353 0084 00C0 rjmp .L42 |
| 354 0086 00C0 rjmp .L42 |
| 355 0088 00C0 rjmp .L42 |
| 356 008a 00C0 rjmp .L42 |
| 357 008c 00C0 rjmp .L42 |
| 358 008e 00C0 rjmp .L42 |
| 359 0090 00C0 rjmp .L31 |
| 360 0092 00C0 rjmp .L42 |
| 361 0094 00C0 rjmp .L42 |
| 362 0096 00C0 rjmp .L42 |
| 363 0098 00C0 rjmp .L42 |
| 364 009a 00C0 rjmp .L42 |
| 365 009c 00C0 rjmp .L42 |
| 366 009e 00C0 rjmp .L42 |
| 367 00a0 00C0 rjmp .L32 |
| 368 .text |
| 369 .L25: |
| 191:I2CInterface.c **** { |
| 192:I2CInterface.c **** case TW_START: /* Start condition */ |
| 193:I2CInterface.c **** case TW_REP_START: /* Repeated start condition */ |
| 194:I2CInterface.c **** if(retry_cnt > MAX_TWI_RETRIES) |
| 370 .stabn 68,0,194,.LM29-__vector_17 |
| 371 .LM29: |
| 372 00ba 8091 0000 lds r24,retry_cnt |
| 373 00be 8330 cpi r24,lo8(3) |
| 374 00c0 48F0 brlo .L34 |
| 195:I2CInterface.c **** { |
| 196:I2CInterface.c **** /* generate stop condition if we've reached our retry limit */ |
| GAS LISTING /tmp/ccZHfAgR.s page 11 |
| |
| |
| 197:I2CInterface.c **** TWCR |= (1<<TWINT)|(1<<TWSTO); |
| 375 .stabn 68,0,197,.LM30-__vector_17 |
| 376 .LM30: |
| 377 00c2 86B7 in r24,86-0x20 |
| 378 00c4 8069 ori r24,lo8(-112) |
| 379 00c6 86BF out 86-0x20,r24 |
| 198:I2CInterface.c **** status &= ~(1<<BUSY); |
| 380 .stabn 68,0,198,.LM31-__vector_17 |
| 381 .LM31: |
| 382 00c8 8091 0000 lds r24,status |
| 383 00cc 8F77 andi r24,lo8(127) |
| 384 00ce 8093 0000 sts status,r24 |
| 385 00d2 8AC0 rjmp .L42 |
| 386 .L34: |
| 199:I2CInterface.c **** return; |
| 200:I2CInterface.c **** } |
| 201:I2CInterface.c **** /* indicate read or write */ |
| 202:I2CInterface.c **** TWDR = (twi_address<<1) + twi_ddr; |
| 387 .stabn 68,0,202,.LM32-__vector_17 |
| 388 .LM32: |
| 389 00d4 8091 0000 lds r24,twi_address |
| 390 00d8 9091 0000 lds r25,twi_ddr |
| 391 00dc 880F lsl r24 |
| 392 00de 890F add r24,r25 |
| 393 00e0 83B9 out 35-0x20,r24 |
| 203:I2CInterface.c **** /* TWSTA must be cleared...also clears TWINT */ |
| 204:I2CInterface.c **** TWCR &= ~(1<<TWSTA); |
| 394 .stabn 68,0,204,.LM33-__vector_17 |
| 395 .LM33: |
| 396 00e2 86B7 in r24,86-0x20 |
| 397 00e4 8F7D andi r24,lo8(-33) |
| 398 00e6 86BF out 86-0x20,r24 |
| 399 00e8 7FC0 rjmp .L42 |
| 400 .L26: |
| 205:I2CInterface.c **** break; |
| 206:I2CInterface.c **** |
| 207:I2CInterface.c **** case TW_MT_SLA_ACK: /* Slave acknowledged address, */ |
| 208:I2CInterface.c **** retry_cnt = 0; |
| 401 .stabn 68,0,208,.LM34-__vector_17 |
| 402 .LM34: |
| 403 00ea 1092 0000 sts retry_cnt,__zero_reg__ |
| 209:I2CInterface.c **** /* tx the data, and increment the data pointer */ |
| 210:I2CInterface.c **** TWDR = *twi_data; |
| 404 .stabn 68,0,210,.LM35-__vector_17 |
| 405 .LM35: |
| 406 00ee E091 0000 lds r30,twi_data |
| 407 00f2 F091 0000 lds r31,(twi_data)+1 |
| 408 00f6 8081 ld r24,Z |
| 409 00f8 83B9 out 35-0x20,r24 |
| 211:I2CInterface.c **** twi_data++; |
| 410 .stabn 68,0,211,.LM36-__vector_17 |
| 411 .LM36: |
| 412 00fa 3196 adiw r30,1 |
| 413 00fc F093 0000 sts (twi_data)+1,r31 |
| 414 0100 E093 0000 sts twi_data,r30 |
| 212:I2CInterface.c **** |
| 213:I2CInterface.c **** /* clear the int to continue */ |
| GAS LISTING /tmp/ccZHfAgR.s page 12 |
| |
| |
| 214:I2CInterface.c **** TWCR |= (1<<TWINT); |
| 415 .stabn 68,0,214,.LM37-__vector_17 |
| 416 .LM37: |
| 417 0104 86B7 in r24,86-0x20 |
| 418 0106 8068 ori r24,lo8(-128) |
| 419 0108 86BF out 86-0x20,r24 |
| 420 010a 6EC0 rjmp .L42 |
| 421 .L27: |
| 215:I2CInterface.c **** break; |
| 216:I2CInterface.c **** |
| 217:I2CInterface.c **** case TW_MT_SLA_NACK: /* Slave didn't acknowledge address, */ |
| 218:I2CInterface.c **** case TW_MR_SLA_NACK: |
| 219:I2CInterface.c **** retry_cnt++; |
| 422 .stabn 68,0,219,.LM38-__vector_17 |
| 423 .LM38: |
| 424 010c 8091 0000 lds r24,retry_cnt |
| 425 0110 8F5F subi r24,lo8(-(1)) |
| 426 0112 8093 0000 sts retry_cnt,r24 |
| 220:I2CInterface.c **** |
| 221:I2CInterface.c **** /* retry...*/ |
| 222:I2CInterface.c **** TWCR |= (1<<TWINT)|(1<<TWSTA)|(1<<TWSTO); |
| 427 .stabn 68,0,222,.LM39-__vector_17 |
| 428 .LM39: |
| 429 0116 86B7 in r24,86-0x20 |
| 430 0118 806B ori r24,lo8(-80) |
| 431 011a 86BF out 86-0x20,r24 |
| 432 011c 65C0 rjmp .L42 |
| 433 .L28: |
| 223:I2CInterface.c **** break; |
| 224:I2CInterface.c **** |
| 225:I2CInterface.c **** case TW_MT_DATA_ACK: /* Slave Acknowledged data, */ |
| 226:I2CInterface.c **** if(--twi_bytes > 0) |
| 434 .stabn 68,0,226,.LM40-__vector_17 |
| 435 .LM40: |
| 436 011e 8091 0000 lds r24,twi_bytes |
| 437 0122 8150 subi r24,lo8(-(-1)) |
| 438 0124 8093 0000 sts twi_bytes,r24 |
| 439 0128 8091 0000 lds r24,twi_bytes |
| 440 012c 8823 tst r24 |
| 441 012e 79F0 breq .L36 |
| 227:I2CInterface.c **** { |
| 228:I2CInterface.c **** /* more data to send, so send it */ |
| 229:I2CInterface.c **** TWDR = *twi_data; |
| 442 .stabn 68,0,229,.LM41-__vector_17 |
| 443 .LM41: |
| 444 0130 E091 0000 lds r30,twi_data |
| 445 0134 F091 0000 lds r31,(twi_data)+1 |
| 446 0138 8081 ld r24,Z |
| 447 013a 83B9 out 35-0x20,r24 |
| 230:I2CInterface.c **** twi_data++; |
| 448 .stabn 68,0,230,.LM42-__vector_17 |
| 449 .LM42: |
| 450 013c 3196 adiw r30,1 |
| 451 013e F093 0000 sts (twi_data)+1,r31 |
| 452 0142 E093 0000 sts twi_data,r30 |
| 231:I2CInterface.c **** TWCR |= (1<<TWINT); |
| 453 .stabn 68,0,231,.LM43-__vector_17 |
| GAS LISTING /tmp/ccZHfAgR.s page 13 |
| |
| |
| 454 .LM43: |
| 455 0146 86B7 in r24,86-0x20 |
| 456 0148 8068 ori r24,lo8(-128) |
| 457 014a 86BF out 86-0x20,r24 |
| 458 014c 4DC0 rjmp .L42 |
| 459 .L36: |
| 232:I2CInterface.c **** } |
| 233:I2CInterface.c **** else |
| 234:I2CInterface.c **** { |
| 235:I2CInterface.c **** /* generate the stop condition if needed */ |
| 236:I2CInterface.c **** TWCR |= (1<<TWSTO)|(1<<TWINT); |
| 460 .stabn 68,0,236,.LM44-__vector_17 |
| 461 .LM44: |
| 462 014e 86B7 in r24,86-0x20 |
| 463 0150 8069 ori r24,lo8(-112) |
| 464 0152 86BF out 86-0x20,r24 |
| 237:I2CInterface.c **** status &= ~(1<<BUSY); |
| 465 .stabn 68,0,237,.LM45-__vector_17 |
| 466 .LM45: |
| 467 0154 8091 0000 lds r24,status |
| 468 0158 8F77 andi r24,lo8(127) |
| 469 015a 8093 0000 sts status,r24 |
| 470 015e 44C0 rjmp .L42 |
| 471 .L29: |
| 238:I2CInterface.c **** } |
| 239:I2CInterface.c **** break; |
| 240:I2CInterface.c **** |
| 241:I2CInterface.c **** case TW_MT_DATA_NACK: /* Slave didn't acknowledge data */ |
| 242:I2CInterface.c **** /* send the stop condition */ |
| 243:I2CInterface.c **** TWCR |= (1<<TWINT)|(1<<TWSTO); |
| 472 .stabn 68,0,243,.LM46-__vector_17 |
| 473 .LM46: |
| 474 0160 86B7 in r24,86-0x20 |
| 475 0162 8069 ori r24,lo8(-112) |
| 476 0164 86BF out 86-0x20,r24 |
| 244:I2CInterface.c **** status &= ~(1<<BUSY); |
| 477 .stabn 68,0,244,.LM47-__vector_17 |
| 478 .LM47: |
| 479 0166 8091 0000 lds r24,status |
| 480 016a 8F77 andi r24,lo8(127) |
| 481 016c 8093 0000 sts status,r24 |
| 482 0170 3BC0 rjmp .L42 |
| 483 .L30: |
| 245:I2CInterface.c **** break; |
| 246:I2CInterface.c **** |
| 247:I2CInterface.c **** case TW_MR_SLA_ACK: /* Slave acknowledged address */ |
| 248:I2CInterface.c **** if(--twi_bytes > 0) |
| 484 .stabn 68,0,248,.LM48-__vector_17 |
| 485 .LM48: |
| 486 0172 8091 0000 lds r24,twi_bytes |
| 487 0176 8150 subi r24,lo8(-(-1)) |
| 488 0178 8093 0000 sts twi_bytes,r24 |
| 489 017c 8091 0000 lds r24,twi_bytes |
| 490 0180 8823 tst r24 |
| 491 0182 21F0 breq .L38 |
| 249:I2CInterface.c **** { |
| 250:I2CInterface.c **** /* if there is more than one byte to read, acknowledge */ |
| GAS LISTING /tmp/ccZHfAgR.s page 14 |
| |
| |
| 251:I2CInterface.c **** TWCR |= (1<<TWEA)|(1<<TWINT); |
| 492 .stabn 68,0,251,.LM49-__vector_17 |
| 493 .LM49: |
| 494 0184 86B7 in r24,86-0x20 |
| 495 0186 806C ori r24,lo8(-64) |
| 496 0188 86BF out 86-0x20,r24 |
| 497 018a 2EC0 rjmp .L42 |
| 498 .L38: |
| 252:I2CInterface.c **** } |
| 253:I2CInterface.c **** else |
| 254:I2CInterface.c **** { |
| 255:I2CInterface.c **** /* no acknowledge */ |
| 256:I2CInterface.c **** TWCR |= (1<<TWINT); |
| 499 .stabn 68,0,256,.LM50-__vector_17 |
| 500 .LM50: |
| 501 018c 86B7 in r24,86-0x20 |
| 502 018e 8068 ori r24,lo8(-128) |
| 503 0190 86BF out 86-0x20,r24 |
| 504 0192 2AC0 rjmp .L42 |
| 505 .L31: |
| 257:I2CInterface.c **** } |
| 258:I2CInterface.c **** break; |
| 259:I2CInterface.c **** |
| 260:I2CInterface.c **** case TW_MR_DATA_ACK: /* Master acknowledged data */ |
| 261:I2CInterface.c **** |
| 262:I2CInterface.c **** /* grab the received data */ |
| 263:I2CInterface.c **** *twi_data = TWDR; |
| 506 .stabn 68,0,263,.LM51-__vector_17 |
| 507 .LM51: |
| 508 0194 E091 0000 lds r30,twi_data |
| 509 0198 F091 0000 lds r31,(twi_data)+1 |
| 510 019c 83B1 in r24,35-0x20 |
| 511 019e 8083 st Z,r24 |
| 264:I2CInterface.c **** twi_data++; |
| 512 .stabn 68,0,264,.LM52-__vector_17 |
| 513 .LM52: |
| 514 01a0 3196 adiw r30,1 |
| 515 01a2 F093 0000 sts (twi_data)+1,r31 |
| 516 01a6 E093 0000 sts twi_data,r30 |
| 265:I2CInterface.c **** if(--twi_bytes > 0) |
| 517 .stabn 68,0,265,.LM53-__vector_17 |
| 518 .LM53: |
| 519 01aa 8091 0000 lds r24,twi_bytes |
| 520 01ae 8150 subi r24,lo8(-(-1)) |
| 521 01b0 8093 0000 sts twi_bytes,r24 |
| 522 01b4 8091 0000 lds r24,twi_bytes |
| 523 01b8 8823 tst r24 |
| 524 01ba 21F0 breq .L40 |
| 266:I2CInterface.c **** { |
| 267:I2CInterface.c **** /* get the next data byte and ack */ |
| 268:I2CInterface.c **** TWCR |= (1<<TWEA)|(1<<TWINT); |
| 525 .stabn 68,0,268,.LM54-__vector_17 |
| 526 .LM54: |
| 527 01bc 86B7 in r24,86-0x20 |
| 528 01be 806C ori r24,lo8(-64) |
| 529 01c0 86BF out 86-0x20,r24 |
| 530 01c2 12C0 rjmp .L42 |
| GAS LISTING /tmp/ccZHfAgR.s page 15 |
| |
| |
| 531 .L40: |
| 269:I2CInterface.c **** } |
| 270:I2CInterface.c **** else |
| 271:I2CInterface.c **** { |
| 272:I2CInterface.c **** /* clear out the enable acknowledge bit */ |
| 273:I2CInterface.c **** TWCR &= ~(1<<TWEA); |
| 532 .stabn 68,0,273,.LM55-__vector_17 |
| 533 .LM55: |
| 534 01c4 86B7 in r24,86-0x20 |
| 535 01c6 8F7B andi r24,lo8(-65) |
| 536 01c8 86BF out 86-0x20,r24 |
| 537 01ca 0EC0 rjmp .L42 |
| 538 .L32: |
| 274:I2CInterface.c **** } |
| 275:I2CInterface.c **** break; |
| 276:I2CInterface.c **** |
| 277:I2CInterface.c **** case TW_MR_DATA_NACK: /* Master didn't acknowledge data -> end of read process */ |
| 278:I2CInterface.c **** /* read data, and generate the stop condition */ |
| 279:I2CInterface.c **** *twi_data = TWDR; |
| 539 .stabn 68,0,279,.LM56-__vector_17 |
| 540 .LM56: |
| 541 01cc E091 0000 lds r30,twi_data |
| 542 01d0 F091 0000 lds r31,(twi_data)+1 |
| 543 01d4 83B1 in r24,35-0x20 |
| 544 01d6 8083 st Z,r24 |
| 280:I2CInterface.c **** TWCR |= (1<<TWSTO)|(1<<TWINT); |
| 545 .stabn 68,0,280,.LM57-__vector_17 |
| 546 .LM57: |
| 547 01d8 86B7 in r24,86-0x20 |
| 548 01da 8069 ori r24,lo8(-112) |
| 549 01dc 86BF out 86-0x20,r24 |
| 281:I2CInterface.c **** status &= ~(1<<BUSY); |
| 550 .stabn 68,0,281,.LM58-__vector_17 |
| 551 .LM58: |
| 552 01de 8091 0000 lds r24,status |
| 553 01e2 8F77 andi r24,lo8(127) |
| 554 01e4 8093 0000 sts status,r24 |
| 555 .L42: |
| 556 /* epilogue: frame size=0 */ |
| 557 01e8 FF91 pop r31 |
| 558 01ea EF91 pop r30 |
| 559 01ec BF91 pop r27 |
| 560 01ee AF91 pop r26 |
| 561 01f0 9F91 pop r25 |
| 562 01f2 8F91 pop r24 |
| 563 01f4 0F90 pop __tmp_reg__ |
| 564 01f6 0FBE out __SREG__,__tmp_reg__ |
| 565 01f8 0F90 pop __tmp_reg__ |
| 566 01fa 1F90 pop __zero_reg__ |
| 567 01fc 1895 reti |
| 568 /* epilogue end (size=11) */ |
| 569 /* function __vector_17 size 271 (249) */ |
| 570 .size __vector_17, .-__vector_17 |
| 571 .Lscope4: |
| 572 .stabs "",36,0,0,.Lscope4-__vector_17 |
| 573 .stabd 78,0,0 |
| 574 .lcomm twi_address,1 |
| GAS LISTING /tmp/ccZHfAgR.s page 16 |
| |
| |
| 575 .lcomm twi_data,2 |
| 576 .lcomm twi_ddr,1 |
| 577 .lcomm twi_bytes,1 |
| 578 .lcomm status,1 |
| 579 .lcomm retry_cnt,1 |
| 580 .stabs "twi_address:S(0,17)=B(0,11)",40,0,59,twi_address |
| 581 .stabs "twi_data:S(0,18)=*(0,17)",40,0,60,twi_data |
| 582 .stabs "twi_ddr:S(0,17)",40,0,61,twi_ddr |
| 583 .stabs "twi_bytes:S(0,17)",40,0,62,twi_bytes |
| 584 .stabs "status:S(0,17)",40,0,63,status |
| 585 .stabs "retry_cnt:S(0,17)",40,0,64,retry_cnt |
| 586 .stabs "",100,0,0,.Letext0 |
| 587 .Letext0: |
| 588 /* File "I2CInterface.c": code 336 = 0x0150 ( 310), prologues 11, epilogues 15 */ |
| GAS LISTING /tmp/ccZHfAgR.s page 17 |
| |
| |
| DEFINED SYMBOLS |
| *ABS*:00000000 I2CInterface.c |
| /tmp/ccZHfAgR.s:3 *ABS*:0000003f __SREG__ |
| /tmp/ccZHfAgR.s:4 *ABS*:0000003e __SP_H__ |
| /tmp/ccZHfAgR.s:5 *ABS*:0000003d __SP_L__ |
| /tmp/ccZHfAgR.s:6 *ABS*:00000000 __tmp_reg__ |
| /tmp/ccZHfAgR.s:7 *ABS*:00000001 __zero_reg__ |
| /tmp/ccZHfAgR.s:79 .text:00000000 I2CInt_init |
| /tmp/ccZHfAgR.s:106 .text:00000008 I2CInt_writeData |
| /tmp/ccZHfAgR.s:577 .bss:00000005 status |
| .bss:00000000 twi_address |
| /tmp/ccZHfAgR.s:574 .bss:00000001 twi_data |
| /tmp/ccZHfAgR.s:576 .bss:00000004 twi_bytes |
| /tmp/ccZHfAgR.s:575 .bss:00000003 twi_ddr |
| /tmp/ccZHfAgR.s:578 .bss:00000006 retry_cnt |
| /tmp/ccZHfAgR.s:164 .text:00000040 I2CInt_readData |
| /tmp/ccZHfAgR.s:214 .text:00000074 I2CInt_isI2cBusy |
| /tmp/ccZHfAgR.s:240 .text:00000082 __vector_17 |
| |
| UNDEFINED SYMBOLS |
| __do_copy_data |
| __do_clear_bss |