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GAS LISTING /tmp/ccZHfAgR.s page 11 .file "I2CInterface.c"2 .arch atmega83 __SREG__ = 0x3f4 __SP_H__ = 0x3e5 __SP_L__ = 0x3d6 __tmp_reg__ = 07 __zero_reg__ = 18 .global __do_copy_data9 .global __do_clear_bss10 .stabs "/home/kaklik/projects/programy/Atmel_C/AVRcam/",100,0,2,.Ltext011 .stabs "I2CInterface.c",100,0,2,.Ltext012 .text13 .Ltext0:14 .stabs "gcc2_compiled.",60,0,0,015 .stabs "int:t(0,1)=r(0,1);-32768;32767;",128,0,0,016 .stabs "char:t(0,2)=@s8;r(0,2);0;255;",128,0,0,017 .stabs "long int:t(0,3)=@s32;r(0,3);020000000000;017777777777;",128,0,0,018 .stabs "unsigned int:t(0,4)=r(0,4);0;0177777;",128,0,0,019 .stabs "long unsigned int:t(0,5)=@s32;r(0,5);0;037777777777;",128,0,0,020 .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;",128,0,0,022 .stabs "short int:t(0,8)=r(0,8);-32768;32767;",128,0,0,023 .stabs "short unsigned int:t(0,9)=r(0,9);0;0177777;",128,0,0,024 .stabs "signed char:t(0,10)=@s8;r(0,10);-128;127;",128,0,0,025 .stabs "unsigned char:t(0,11)=@s8;r(0,11);0;255;",128,0,0,026 .stabs "float:t(0,12)=r(0,1);4;0;",128,0,0,027 .stabs "double:t(0,13)=r(0,1);4;0;",128,0,0,028 .stabs "long double:t(0,14)=r(0,1);4;0;",128,0,0,029 .stabs "void:t(0,15)=(0,15)",128,0,0,030 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/avr/io.h",130,0,0,031 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/avr/sfr_defs.h",130,0,0,032 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/inttypes.h",130,0,0,033 .stabs "/usr/lib/gcc/avr/4.1.0/../../../../avr/include/stdint.h",130,0,0,034 .stabs "int8_t:t(4,1)=(0,10)",128,0,116,035 .stabs "uint8_t:t(4,2)=(0,11)",128,0,117,036 .stabs "int16_t:t(4,3)=(0,1)",128,0,118,037 .stabs "uint16_t:t(4,4)=(0,4)",128,0,119,038 .stabs "int32_t:t(4,5)=(0,3)",128,0,120,039 .stabs "uint32_t:t(4,6)=(0,5)",128,0,121,040 .stabs "int64_t:t(4,7)=(0,6)",128,0,122,041 .stabs "uint64_t:t(4,8)=(0,7)",128,0,123,042 .stabs "intptr_t:t(4,9)=(4,3)",128,0,135,043 .stabs "uintptr_t:t(4,10)=(4,4)",128,0,140,044 .stabs "int_least8_t:t(4,11)=(4,1)",128,0,152,045 .stabs "uint_least8_t:t(4,12)=(4,2)",128,0,157,046 .stabs "int_least16_t:t(4,13)=(4,3)",128,0,162,047 .stabs "uint_least16_t:t(4,14)=(4,4)",128,0,167,048 .stabs "int_least32_t:t(4,15)=(4,5)",128,0,172,049 .stabs "uint_least32_t:t(4,16)=(4,6)",128,0,177,050 .stabs "int_least64_t:t(4,17)=(4,7)",128,0,182,051 .stabs "uint_least64_t:t(4,18)=(4,8)",128,0,187,052 .stabs "int_fast8_t:t(4,19)=(4,1)",128,0,200,053 .stabs "uint_fast8_t:t(4,20)=(4,2)",128,0,205,054 .stabs "int_fast16_t:t(4,21)=(4,3)",128,0,210,055 .stabs "uint_fast16_t:t(4,22)=(4,4)",128,0,215,056 .stabs "int_fast32_t:t(4,23)=(4,5)",128,0,220,057 .stabs "uint_fast32_t:t(4,24)=(4,6)",128,0,225,0GAS LISTING /tmp/ccZHfAgR.s page 258 .stabs "int_fast64_t:t(4,25)=(4,7)",128,0,230,059 .stabs "uint_fast64_t:t(4,26)=(4,8)",128,0,235,060 .stabs "intmax_t:t(4,27)=(4,7)",128,0,249,061 .stabs "uintmax_t:t(4,28)=(4,8)",128,0,254,062 .stabn 162,0,0,063 .stabs "int_farptr_t:t(3,1)=(4,5)",128,0,76,064 .stabs "uint_farptr_t:t(3,2)=(4,6)",128,0,80,065 .stabn 162,0,0,066 .stabn 162,0,0,067 .stabn 162,0,0,068 .stabs "CamConfig.h",130,0,0,069 .stabs "I2CInterface.h",130,0,0,070 .stabs "CommonDefs.h",130,0,0,071 .stabs "bool_t:t(7,1)=(0,11)",128,0,56,072 .stabn 162,0,0,073 .stabs "i2cCmd_t:t(6,1)=(6,2)=s2configReg:(0,11),0,8;data:(0,11),8,8;;",128,0,53,074 .stabn 162,0,0,075 .stabn 162,0,0,076 .stabs "I2CInt_init:F(0,15)",36,0,85,I2CInt_init77 .global I2CInt_init78 .type I2CInt_init, @function79 I2CInt_init:80 .stabd 46,0,01:I2CInterface.c **** /*2:I2CInterface.c **** Copyright (C) 2004 John Orlando3: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/or7:I2CInterface.c **** modify it under the terms of the GNU General Public8:I2CInterface.c **** License as published by the Free Software Foundation; either9: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 of13:I2CInterface.c **** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU14:I2CInterface.c **** General Public License for more details.15:I2CInterface.c ****16:I2CInterface.c **** You should have received a copy of the GNU General Public17:I2CInterface.c **** License along with this program; if not, write to the Free Software18:I2CInterface.c **** Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA19:I2CInterface.c ****20:I2CInterface.c **** For more information on the AVRcam, please contact:21:I2CInterface.c ****22:I2CInterface.c **** john@jrobot.net23: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.c28:I2CInterface.c **** Module Date: 4/10/200429:I2CInterface.c **** Module Auth: John Orlando30:I2CInterface.c ****31:I2CInterface.c **** Description: This module is responsible for providing a32:I2CInterface.c **** low-level interface to the I2C hardware resident on the33:I2CInterface.c **** mega8 processor (also known as the Two-Wire Interface,34:I2CInterface.c **** or TWI). The interface is needed to configure theGAS LISTING /tmp/ccZHfAgR.s page 335:I2CInterface.c **** needed registers in the OV6620 camera. This interface36:I2CInterface.c **** is interrupt-driven based on the events that should37:I2CInterface.c **** occur upon successful writing of an I2C register.38:I2CInterface.c ****39:I2CInterface.c **** Revision History:40:I2CInterface.c **** Date Rel Ver. Notes41:I2CInterface.c **** 4/10/2004 0.1 Module created42:I2CInterface.c **** 6/30/2004 1.0 Initial release for Circuit Cellar43: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 current57:I2CInterface.c **** I2C command being sent over the interface. They need to58: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 273:I2CInterface.c **** #define BUSY 774:I2CInterface.c ****75:I2CInterface.c **** /***********************************************************76:I2CInterface.c **** Function Name: I2CInt_init77:I2CInterface.c **** Function Description: This function is responsible78:I2CInterface.c **** for setting up the registers needed for the TWI79:I2CInterface.c **** interface80:I2CInterface.c ****81:I2CInterface.c **** Inputs: none82:I2CInterface.c **** Outputs: none83:I2CInterface.c **** ***********************************************************/84:I2CInterface.c **** void I2CInt_init(void)85:I2CInterface.c **** {81 .stabn 68,0,85,.LM0-I2CInt_init82 .LM0:83 /* prologue: frame size=0 */84 /* prologue end (size=0) */86:I2CInterface.c **** TWSR = 0;85 .stabn 68,0,86,.LM1-I2CInt_initGAS LISTING /tmp/ccZHfAgR.s page 486 .LM1:87 0000 11B8 out 33-0x20,__zero_reg__87:I2CInterface.c ****88:I2CInterface.c **** /* init the speed of the I2C interface, running at89:I2CInterface.c **** 100 Kbps */90:I2CInterface.c **** TWBR = (FOSC / I2C_SPEED - 16)/2;88 .stabn 68,0,90,.LM2-I2CInt_init89 .LM2:90 0002 88E4 ldi r24,lo8(72)91 0004 80B9 out 32-0x20,r2492 /* epilogue: frame size=0 */93 0006 0895 ret94 /* epilogue end (size=1) */95 /* function I2CInt_init size 4 (3) */96 .size I2CInt_init, .-I2CInt_init97 .Lscope0:98 .stabs "",36,0,0,.Lscope0-I2CInt_init99 .stabd 78,0,0100 .stabs "I2CInt_writeData:F(0,15)",36,0,108,I2CInt_writeData101 .stabs "address:P(0,11)",64,0,107,25102 .stabs "data:P(0,16)=*(0,11)",64,0,107,22103 .stabs "bytes:P(0,11)",64,0,107,20104 .global I2CInt_writeData105 .type I2CInt_writeData, @function106 I2CInt_writeData:107 .stabd 46,0,091:I2CInterface.c **** }92:I2CInterface.c ****93:I2CInterface.c **** /***********************************************************94:I2CInterface.c **** Function Name: I2CInt_writeData95:I2CInterface.c **** Function Description: This function is responsible for96:I2CInterface.c **** initiating the process of writing a sequence of bytes97:I2CInterface.c **** an I2C slave address. This function will try to write98:I2CInterface.c **** the data three times before giving up.99:I2CInterface.c **** Inputs: address: the address of the I2C slave device100:I2CInterface.c **** data: a pointer to the data to be written101:I2CInterface.c **** to the slave...for camera interfacing,102:I2CInterface.c **** the data follows a <register #><data>103:I2CInterface.c **** format104:I2CInterface.c **** bytes: the number of bytes to write105:I2CInterface.c **** Outputs: none106: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_writeData109 .LM3:110 /* prologue: frame size=0 */111 /* prologue end (size=0) */112 0008 982F mov r25,r24113 .L5:109:I2CInterface.c **** while(status & (1<<BUSY)); /* Bus is busy wait (or exit with error code) */114 .stabn 68,0,109,.LM4-I2CInt_writeData115 .LM4:116 000a 8091 0000 lds r24,status117 000e 8823 tst r24118 0010 E4F3 brlt .L5119 .L9:GAS LISTING /tmp/ccZHfAgR.s page 5110:I2CInterface.c **** while(TWCR & (1<<TWSTO));120 .stabn 68,0,110,.LM5-I2CInt_writeData121 .LM5:122 0012 06B6 in __tmp_reg__,86-0x20123 0014 04FC sbrc __tmp_reg__,4124 0016 FDCF rjmp .L9111: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_writeData126 .LM6:127 0018 9093 0000 sts twi_address,r25114:I2CInterface.c **** twi_data = data;128 .stabn 68,0,114,.LM7-I2CInt_writeData129 .LM7:130 001c 7093 0000 sts (twi_data)+1,r23131 0020 6093 0000 sts twi_data,r22115:I2CInterface.c **** twi_bytes = bytes;132 .stabn 68,0,115,.LM8-I2CInt_writeData133 .LM8:134 0024 4093 0000 sts twi_bytes,r20116:I2CInterface.c **** twi_ddr = TW_WRITE;135 .stabn 68,0,116,.LM9-I2CInt_writeData136 .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_writeData139 .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 and121: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_writeData142 .LM11:143 0030 85EA ldi r24,lo8(-91)144 0032 86BF out 86-0x20,r24123:I2CInterface.c ****124:I2CInterface.c **** status |= (1<<BUSY);145 .stabn 68,0,124,.LM12-I2CInt_writeData146 .LM12:147 0034 8091 0000 lds r24,status148 0038 8068 ori r24,lo8(-128)149 003a 8093 0000 sts status,r24150 /* epilogue: frame size=0 */151 003e 0895 ret152 /* epilogue end (size=1) */153 /* function I2CInt_writeData size 28 (27) */154 .size I2CInt_writeData, .-I2CInt_writeData155 .Lscope1:156 .stabs "",36,0,0,.Lscope1-I2CInt_writeData157 .stabd 78,0,0158 .stabs "I2CInt_readData:F(0,15)",36,0,138,I2CInt_readData159 .stabs "address:P(0,11)",64,0,137,25160 .stabs "data:P(0,16)",64,0,137,22161 .stabs "bytes:P(0,11)",64,0,137,20GAS LISTING /tmp/ccZHfAgR.s page 6162 .global I2CInt_readData163 .type I2CInt_readData, @function164 I2CInt_readData:165 .stabd 46,0,0125:I2CInterface.c **** }126:I2CInterface.c ****127:I2CInterface.c **** /***********************************************************128:I2CInterface.c **** Function Name: I2CInt_readData129:I2CInterface.c **** Function Description: This funcion is responsible for130:I2CInterface.c **** reading the specified number of bytes from a slave131:I2CInterface.c **** device.132:I2CInterface.c **** Inputs: address: the slave address to read from133:I2CInterface.c **** data: a pointer to where the data will be stored134:I2CInterface.c **** bytes: the number of bytes to read135:I2CInterface.c **** Outputs: none136: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_readData167 .LM13:168 /* prologue: frame size=0 */169 /* prologue end (size=0) */170 0040 982F mov r25,r24171 .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_readData173 .LM14:174 0042 8091 0000 lds r24,status175 0046 8823 tst r24176 0048 E4F3 brlt .L15141:I2CInterface.c ****142:I2CInterface.c **** twi_address = address;177 .stabn 68,0,142,.LM15-I2CInt_readData178 .LM15:179 004a 9093 0000 sts twi_address,r25143:I2CInterface.c **** twi_data = data;180 .stabn 68,0,143,.LM16-I2CInt_readData181 .LM16:182 004e 7093 0000 sts (twi_data)+1,r23183 0052 6093 0000 sts twi_data,r22144:I2CInterface.c **** twi_bytes = bytes;184 .stabn 68,0,144,.LM17-I2CInt_readData185 .LM17:186 0056 4093 0000 sts twi_bytes,r20145:I2CInterface.c **** twi_ddr = TW_READ;187 .stabn 68,0,145,.LM18-I2CInt_readData188 .LM18:189 005a 81E0 ldi r24,lo8(1)190 005c 8093 0000 sts twi_ddr,r24146:I2CInterface.c ****147:I2CInterface.c **** retry_cnt = 0;191 .stabn 68,0,147,.LM19-I2CInt_readData192 .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 andGAS LISTING /tmp/ccZHfAgR.s page 7150: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_readData195 .LM20:196 0064 85EA ldi r24,lo8(-91)197 0066 86BF out 86-0x20,r24152:I2CInterface.c ****153:I2CInterface.c **** status |= (1<<BUSY);198 .stabn 68,0,153,.LM21-I2CInt_readData199 .LM21:200 0068 8091 0000 lds r24,status201 006c 8068 ori r24,lo8(-128)202 006e 8093 0000 sts status,r24203 /* epilogue: frame size=0 */204 0072 0895 ret205 /* epilogue end (size=1) */206 /* function I2CInt_readData size 26 (25) */207 .size I2CInt_readData, .-I2CInt_readData208 .Lscope2:209 .stabs "",36,0,0,.Lscope2-I2CInt_readData210 .stabd 78,0,0211 .stabs "I2CInt_isI2cBusy:F(7,1)",36,0,166,I2CInt_isI2cBusy212 .global I2CInt_isI2cBusy213 .type I2CInt_isI2cBusy, @function214 I2CInt_isI2cBusy:215 .stabd 46,0,0154:I2CInterface.c **** }155:I2CInterface.c ****156:I2CInterface.c **** /***********************************************************157:I2CInterface.c **** Function Name: I2CInt_isI2cBusy158:I2CInterface.c **** Function Description: This funcion is responsible for159:I2CInterface.c **** indicating if the I2C bus is currently busy to external160:I2CInterface.c **** modules.161:I2CInterface.c **** device.162:I2CInterface.c **** Inputs: none163:I2CInterface.c **** Outputs: bool_t - indicating if bus is busy164:I2CInterface.c **** ***********************************************************/165:I2CInterface.c **** bool_t I2CInt_isI2cBusy(void)166:I2CInterface.c **** {216 .stabn 68,0,166,.LM22-I2CInt_isI2cBusy217 .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_isI2cBusy221 .LM23:222 0074 8091 0000 lds r24,status223 0078 881F rol r24224 007a 8827 clr r24225 007c 881F rol r24169: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 8226 .stabn 68,0,174,.LM24-I2CInt_isI2cBusy227 .LM24:228 007e 9927 clr r25229 /* epilogue: frame size=0 */230 0080 0895 ret231 /* epilogue end (size=1) */232 /* function I2CInt_isI2cBusy size 7 (6) */233 .size I2CInt_isI2cBusy, .-I2CInt_isI2cBusy234 .Lscope3:235 .stabs "",36,0,0,.Lscope3-I2CInt_isI2cBusy236 .stabd 78,0,0237 .stabs "__vector_17:F(0,15)",36,0,185,__vector_17238 .global __vector_17239 .type __vector_17, @function240 __vector_17:241 .stabd 46,0,0175:I2CInterface.c ****176:I2CInterface.c **** /***********************************************************177:I2CInterface.c **** Function Name: <interrupt handler for I2C>178:I2CInterface.c **** Function Description: This function is responsible for179:I2CInterface.c **** implementing the control logic needed to perform a180:I2CInterface.c **** read or write operation with an I2C slave.181:I2CInterface.c **** Inputs: none182:I2CInterface.c **** Outputs: none183:I2CInterface.c **** ***********************************************************/184:I2CInterface.c **** SIGNAL(SIG_2WIRE_SERIAL)185:I2CInterface.c **** {242 .stabn 68,0,185,.LM25-__vector_17243 .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 r24251 008e 9F93 push r25252 0090 AF93 push r26253 0092 BF93 push r27254 0094 EF93 push r30255 0096 FF93 push r31256 /* 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_17258 .LM26:259 0098 81B1 in r24,33-0x20187:I2CInterface.c ****188:I2CInterface.c **** /* the entire I2C handler is state-based...determine189:I2CInterface.c **** what needs to be done based on TWI_status */190:I2CInterface.c **** switch(TWI_status)260 .stabn 68,0,190,.LM27-__vector_17261 .LM27:262 009a 9927 clr r25263 009c AA27 clr r26264 009e BB27 clr r27265 00a0 887F andi r24,lo8(248)266 00a2 9070 andi r25,hi8(248)GAS LISTING /tmp/ccZHfAgR.s page 9267 00a4 A070 andi r26,hlo8(248)268 00a6 B070 andi r27,hhi8(248)269 00a8 FC01 movw r30,r24270 00aa 3897 sbiw r30,8271 00ac E135 cpi r30,81272 00ae F105 cpc r31,__zero_reg__273 00b0 08F0 brlo .+2274 00b2 9AC0 rjmp .L42275 .stabn 68,0,190,.LM28-__vector_17276 .LM28:277 00b4 E050 subi r30,lo8(-(pm(.L33)))278 00b6 F040 sbci r31,hi8(-(pm(.L33)))279 00b8 0994 ijmp280 .data281 .section .progmem.gcc_sw_table, "ax", @progbits282 .p2align 1283 .L33:284 .data285 .section .progmem.gcc_sw_table, "ax", @progbits286 .p2align 1287 0000 00C0 rjmp .L25288 0002 00C0 rjmp .L42289 0004 00C0 rjmp .L42290 0006 00C0 rjmp .L42291 0008 00C0 rjmp .L42292 000a 00C0 rjmp .L42293 000c 00C0 rjmp .L42294 000e 00C0 rjmp .L42295 0010 00C0 rjmp .L25296 0012 00C0 rjmp .L42297 0014 00C0 rjmp .L42298 0016 00C0 rjmp .L42299 0018 00C0 rjmp .L42300 001a 00C0 rjmp .L42301 001c 00C0 rjmp .L42302 001e 00C0 rjmp .L42303 0020 00C0 rjmp .L26304 0022 00C0 rjmp .L42305 0024 00C0 rjmp .L42306 0026 00C0 rjmp .L42307 0028 00C0 rjmp .L42308 002a 00C0 rjmp .L42309 002c 00C0 rjmp .L42310 002e 00C0 rjmp .L42311 0030 00C0 rjmp .L27312 0032 00C0 rjmp .L42313 0034 00C0 rjmp .L42314 0036 00C0 rjmp .L42315 0038 00C0 rjmp .L42316 003a 00C0 rjmp .L42317 003c 00C0 rjmp .L42318 003e 00C0 rjmp .L42319 0040 00C0 rjmp .L28320 0042 00C0 rjmp .L42321 0044 00C0 rjmp .L42322 0046 00C0 rjmp .L42323 0048 00C0 rjmp .L42GAS LISTING /tmp/ccZHfAgR.s page 10324 004a 00C0 rjmp .L42325 004c 00C0 rjmp .L42326 004e 00C0 rjmp .L42327 0050 00C0 rjmp .L29328 0052 00C0 rjmp .L42329 0054 00C0 rjmp .L42330 0056 00C0 rjmp .L42331 0058 00C0 rjmp .L42332 005a 00C0 rjmp .L42333 005c 00C0 rjmp .L42334 005e 00C0 rjmp .L42335 0060 00C0 rjmp .L42336 0062 00C0 rjmp .L42337 0064 00C0 rjmp .L42338 0066 00C0 rjmp .L42339 0068 00C0 rjmp .L42340 006a 00C0 rjmp .L42341 006c 00C0 rjmp .L42342 006e 00C0 rjmp .L42343 0070 00C0 rjmp .L30344 0072 00C0 rjmp .L42345 0074 00C0 rjmp .L42346 0076 00C0 rjmp .L42347 0078 00C0 rjmp .L42348 007a 00C0 rjmp .L42349 007c 00C0 rjmp .L42350 007e 00C0 rjmp .L42351 0080 00C0 rjmp .L27352 0082 00C0 rjmp .L42353 0084 00C0 rjmp .L42354 0086 00C0 rjmp .L42355 0088 00C0 rjmp .L42356 008a 00C0 rjmp .L42357 008c 00C0 rjmp .L42358 008e 00C0 rjmp .L42359 0090 00C0 rjmp .L31360 0092 00C0 rjmp .L42361 0094 00C0 rjmp .L42362 0096 00C0 rjmp .L42363 0098 00C0 rjmp .L42364 009a 00C0 rjmp .L42365 009c 00C0 rjmp .L42366 009e 00C0 rjmp .L42367 00a0 00C0 rjmp .L32368 .text369 .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_17371 .LM29:372 00ba 8091 0000 lds r24,retry_cnt373 00be 8330 cpi r24,lo8(3)374 00c0 48F0 brlo .L34195:I2CInterface.c **** {196:I2CInterface.c **** /* generate stop condition if we've reached our retry limit */GAS LISTING /tmp/ccZHfAgR.s page 11197:I2CInterface.c **** TWCR |= (1<<TWINT)|(1<<TWSTO);375 .stabn 68,0,197,.LM30-__vector_17376 .LM30:377 00c2 86B7 in r24,86-0x20378 00c4 8069 ori r24,lo8(-112)379 00c6 86BF out 86-0x20,r24198:I2CInterface.c **** status &= ~(1<<BUSY);380 .stabn 68,0,198,.LM31-__vector_17381 .LM31:382 00c8 8091 0000 lds r24,status383 00cc 8F77 andi r24,lo8(127)384 00ce 8093 0000 sts status,r24385 00d2 8AC0 rjmp .L42386 .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_17388 .LM32:389 00d4 8091 0000 lds r24,twi_address390 00d8 9091 0000 lds r25,twi_ddr391 00dc 880F lsl r24392 00de 890F add r24,r25393 00e0 83B9 out 35-0x20,r24203:I2CInterface.c **** /* TWSTA must be cleared...also clears TWINT */204:I2CInterface.c **** TWCR &= ~(1<<TWSTA);394 .stabn 68,0,204,.LM33-__vector_17395 .LM33:396 00e2 86B7 in r24,86-0x20397 00e4 8F7D andi r24,lo8(-33)398 00e6 86BF out 86-0x20,r24399 00e8 7FC0 rjmp .L42400 .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_17402 .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_17405 .LM35:406 00ee E091 0000 lds r30,twi_data407 00f2 F091 0000 lds r31,(twi_data)+1408 00f6 8081 ld r24,Z409 00f8 83B9 out 35-0x20,r24211:I2CInterface.c **** twi_data++;410 .stabn 68,0,211,.LM36-__vector_17411 .LM36:412 00fa 3196 adiw r30,1413 00fc F093 0000 sts (twi_data)+1,r31414 0100 E093 0000 sts twi_data,r30212:I2CInterface.c ****213:I2CInterface.c **** /* clear the int to continue */GAS LISTING /tmp/ccZHfAgR.s page 12214:I2CInterface.c **** TWCR |= (1<<TWINT);415 .stabn 68,0,214,.LM37-__vector_17416 .LM37:417 0104 86B7 in r24,86-0x20418 0106 8068 ori r24,lo8(-128)419 0108 86BF out 86-0x20,r24420 010a 6EC0 rjmp .L42421 .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_17423 .LM38:424 010c 8091 0000 lds r24,retry_cnt425 0110 8F5F subi r24,lo8(-(1))426 0112 8093 0000 sts retry_cnt,r24220:I2CInterface.c ****221:I2CInterface.c **** /* retry...*/222:I2CInterface.c **** TWCR |= (1<<TWINT)|(1<<TWSTA)|(1<<TWSTO);427 .stabn 68,0,222,.LM39-__vector_17428 .LM39:429 0116 86B7 in r24,86-0x20430 0118 806B ori r24,lo8(-80)431 011a 86BF out 86-0x20,r24432 011c 65C0 rjmp .L42433 .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_17435 .LM40:436 011e 8091 0000 lds r24,twi_bytes437 0122 8150 subi r24,lo8(-(-1))438 0124 8093 0000 sts twi_bytes,r24439 0128 8091 0000 lds r24,twi_bytes440 012c 8823 tst r24441 012e 79F0 breq .L36227: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_17443 .LM41:444 0130 E091 0000 lds r30,twi_data445 0134 F091 0000 lds r31,(twi_data)+1446 0138 8081 ld r24,Z447 013a 83B9 out 35-0x20,r24230:I2CInterface.c **** twi_data++;448 .stabn 68,0,230,.LM42-__vector_17449 .LM42:450 013c 3196 adiw r30,1451 013e F093 0000 sts (twi_data)+1,r31452 0142 E093 0000 sts twi_data,r30231:I2CInterface.c **** TWCR |= (1<<TWINT);453 .stabn 68,0,231,.LM43-__vector_17GAS LISTING /tmp/ccZHfAgR.s page 13454 .LM43:455 0146 86B7 in r24,86-0x20456 0148 8068 ori r24,lo8(-128)457 014a 86BF out 86-0x20,r24458 014c 4DC0 rjmp .L42459 .L36:232:I2CInterface.c **** }233:I2CInterface.c **** else234: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_17461 .LM44:462 014e 86B7 in r24,86-0x20463 0150 8069 ori r24,lo8(-112)464 0152 86BF out 86-0x20,r24237:I2CInterface.c **** status &= ~(1<<BUSY);465 .stabn 68,0,237,.LM45-__vector_17466 .LM45:467 0154 8091 0000 lds r24,status468 0158 8F77 andi r24,lo8(127)469 015a 8093 0000 sts status,r24470 015e 44C0 rjmp .L42471 .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_17473 .LM46:474 0160 86B7 in r24,86-0x20475 0162 8069 ori r24,lo8(-112)476 0164 86BF out 86-0x20,r24244:I2CInterface.c **** status &= ~(1<<BUSY);477 .stabn 68,0,244,.LM47-__vector_17478 .LM47:479 0166 8091 0000 lds r24,status480 016a 8F77 andi r24,lo8(127)481 016c 8093 0000 sts status,r24482 0170 3BC0 rjmp .L42483 .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_17485 .LM48:486 0172 8091 0000 lds r24,twi_bytes487 0176 8150 subi r24,lo8(-(-1))488 0178 8093 0000 sts twi_bytes,r24489 017c 8091 0000 lds r24,twi_bytes490 0180 8823 tst r24491 0182 21F0 breq .L38249:I2CInterface.c **** {250:I2CInterface.c **** /* if there is more than one byte to read, acknowledge */GAS LISTING /tmp/ccZHfAgR.s page 14251:I2CInterface.c **** TWCR |= (1<<TWEA)|(1<<TWINT);492 .stabn 68,0,251,.LM49-__vector_17493 .LM49:494 0184 86B7 in r24,86-0x20495 0186 806C ori r24,lo8(-64)496 0188 86BF out 86-0x20,r24497 018a 2EC0 rjmp .L42498 .L38:252:I2CInterface.c **** }253:I2CInterface.c **** else254:I2CInterface.c **** {255:I2CInterface.c **** /* no acknowledge */256:I2CInterface.c **** TWCR |= (1<<TWINT);499 .stabn 68,0,256,.LM50-__vector_17500 .LM50:501 018c 86B7 in r24,86-0x20502 018e 8068 ori r24,lo8(-128)503 0190 86BF out 86-0x20,r24504 0192 2AC0 rjmp .L42505 .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_17507 .LM51:508 0194 E091 0000 lds r30,twi_data509 0198 F091 0000 lds r31,(twi_data)+1510 019c 83B1 in r24,35-0x20511 019e 8083 st Z,r24264:I2CInterface.c **** twi_data++;512 .stabn 68,0,264,.LM52-__vector_17513 .LM52:514 01a0 3196 adiw r30,1515 01a2 F093 0000 sts (twi_data)+1,r31516 01a6 E093 0000 sts twi_data,r30265:I2CInterface.c **** if(--twi_bytes > 0)517 .stabn 68,0,265,.LM53-__vector_17518 .LM53:519 01aa 8091 0000 lds r24,twi_bytes520 01ae 8150 subi r24,lo8(-(-1))521 01b0 8093 0000 sts twi_bytes,r24522 01b4 8091 0000 lds r24,twi_bytes523 01b8 8823 tst r24524 01ba 21F0 breq .L40266: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_17526 .LM54:527 01bc 86B7 in r24,86-0x20528 01be 806C ori r24,lo8(-64)529 01c0 86BF out 86-0x20,r24530 01c2 12C0 rjmp .L42GAS LISTING /tmp/ccZHfAgR.s page 15531 .L40:269:I2CInterface.c **** }270:I2CInterface.c **** else271:I2CInterface.c **** {272:I2CInterface.c **** /* clear out the enable acknowledge bit */273:I2CInterface.c **** TWCR &= ~(1<<TWEA);532 .stabn 68,0,273,.LM55-__vector_17533 .LM55:534 01c4 86B7 in r24,86-0x20535 01c6 8F7B andi r24,lo8(-65)536 01c8 86BF out 86-0x20,r24537 01ca 0EC0 rjmp .L42538 .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_17540 .LM56:541 01cc E091 0000 lds r30,twi_data542 01d0 F091 0000 lds r31,(twi_data)+1543 01d4 83B1 in r24,35-0x20544 01d6 8083 st Z,r24280:I2CInterface.c **** TWCR |= (1<<TWSTO)|(1<<TWINT);545 .stabn 68,0,280,.LM57-__vector_17546 .LM57:547 01d8 86B7 in r24,86-0x20548 01da 8069 ori r24,lo8(-112)549 01dc 86BF out 86-0x20,r24281:I2CInterface.c **** status &= ~(1<<BUSY);550 .stabn 68,0,281,.LM58-__vector_17551 .LM58:552 01de 8091 0000 lds r24,status553 01e2 8F77 andi r24,lo8(127)554 01e4 8093 0000 sts status,r24555 .L42:556 /* epilogue: frame size=0 */557 01e8 FF91 pop r31558 01ea EF91 pop r30559 01ec BF91 pop r27560 01ee AF91 pop r26561 01f0 9F91 pop r25562 01f2 8F91 pop r24563 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 reti568 /* epilogue end (size=11) */569 /* function __vector_17 size 271 (249) */570 .size __vector_17, .-__vector_17571 .Lscope4:572 .stabs "",36,0,0,.Lscope4-__vector_17573 .stabd 78,0,0574 .lcomm twi_address,1GAS LISTING /tmp/ccZHfAgR.s page 16575 .lcomm twi_data,2576 .lcomm twi_ddr,1577 .lcomm twi_bytes,1578 .lcomm status,1579 .lcomm retry_cnt,1580 .stabs "twi_address:S(0,17)=B(0,11)",40,0,59,twi_address581 .stabs "twi_data:S(0,18)=*(0,17)",40,0,60,twi_data582 .stabs "twi_ddr:S(0,17)",40,0,61,twi_ddr583 .stabs "twi_bytes:S(0,17)",40,0,62,twi_bytes584 .stabs "status:S(0,17)",40,0,63,status585 .stabs "retry_cnt:S(0,17)",40,0,64,retry_cnt586 .stabs "",100,0,0,.Letext0587 .Letext0:588 /* File "I2CInterface.c": code 336 = 0x0150 ( 310), prologues 11, epilogues 15 */GAS LISTING /tmp/ccZHfAgR.s page 17DEFINED 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_17UNDEFINED SYMBOLS__do_copy_data__do_clear_bss