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comparison code_part1/OSTC_code_asm_part1/i2c_eeprom.asm @ 455:c512a868937c

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last work for 2.0: Fixing 32kB boundary read for logbook
author heinrichsweikamp
date Tue, 30 Aug 2011 16:29:21 +0200
parents a76c5a3e9e96
children 3091628b2742
comparison
equal deleted inserted replaced
454:69f1f3a1c645 455:c512a868937c
125 125
126 clrf ext_ee_temp1 ; low address counter 126 clrf ext_ee_temp1 ; low address counter
127 clrf ext_ee_temp2 ; high address counter 127 clrf ext_ee_temp2 ; high address counter
128 bcf second_FD ; clear flags 128 bcf second_FD ; clear flags
129 bcf first_FD 129 bcf first_FD
130 bcf eeprom_switched_b1
130 get_free_EEPROM_location3: 131 get_free_EEPROM_location3:
131 bsf SSPCON2, PEN ; Stop condition 132 bsf SSPCON2, PEN ; Stop condition
132 rcall WaitMSSP 133 rcall WaitMSSP
133 bsf SSPCON2,SEN ; Start condition 134 bsf SSPCON2,SEN ; Start condition
134 rcall WaitMSSP 135 rcall WaitMSSP
155 movwf SSPBUF ; control byte 156 movwf SSPBUF ; control byte
156 rcall WaitMSSP 157 rcall WaitMSSP
157 rcall I2C_WaitforACK 158 rcall I2C_WaitforACK
158 159
159 get_free_EEPROM_location2: 160 get_free_EEPROM_location2:
161 btfsc eeprom_switched_b1 ; Switched to Block1 already?
162 bra get_free_EEPROM_location2_x ; Yes, skip this check!
163
164 btfsc ext_ee_temp2,7 ; Access Block1?
165 bsf eeprom_switched_b1 ; Yes, and set the flag so this check is skipped in the rest of this routine
166 btfsc ext_ee_temp2,7 ; Access Block1?
167 bra get_free_EEPROM_location3 ; Yes, initiate new read sequence in block1
168
169 get_free_EEPROM_location2_x:
160 bsf SSPCON2, RCEN ; Enable recieve mode 170 bsf SSPCON2, RCEN ; Enable recieve mode
161 rcall WaitMSSP 171 rcall WaitMSSP
162 btfsc first_FD 172 btfsc first_FD
163 bra test_2nd_FD 173 bra test_2nd_FD
164 bsf first_FD ; found first 0xFD? 174 bsf first_FD ; found first 0xFD?