AVR C Runtime Library - Bugs: bug #14486, some macros from boot.h doesn't...
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bug #14486: some macros from boot.h doesn't compile correctly
Submitter: | None | ||
Submitted: | Sat 10 Sep 2005 07:01:10 AM UTC | ||
Category: | None | Severity: | 3 - Normal |
Priority: | 7 - High | Item Group: | None |
Status: | Fixed | Assigned to: | None |
Percent Complete: | 0% | Originator Email: | -email is unavailable- |
Open/Closed: | Closed | Release: | None |
Fixed Release: | None |
No files currently attached
Depends on the following items: None found
Items that depend on this one: None found
CC list is empty
Follow 6 latest changes.
Date | Changed by | Updated Field | Previous Value | => | Replaced by |
---|---|---|---|---|---|
2005-10-06 | aesok | Assigned to | arcanum | None | |
Open/Closed | Open | Closed | |||
2005-10-06 | aesok | Status | None | Fixed | |
2005-09-10 | joerg_wunsch | Priority | 5 - Normal | 7 - High | |
Assigned to | None | arcanum | |||
2005-09-10 | None | Carbon-Copy | - | Added rmarko --AT-- maxwell --DOT-- spina --DOT-- si |
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Corresponding source code
Hi
I have a problem with programing the bootloader. I am using atmega128, avrlibc 1.2.5, avr-gcc 4.0.1, binutils 2.16.1. Linker report problem with undefined reference 'Y'. This problem is in function boot_page_erase(addr) from boot .h. I will explain my problem on two examples.
First instance of call boot_page_erase():
51:program.c ** boot_page_erase (70);
80 .LM2:
81 /* #NOAPP */
82 0008 23E0 ldi r18,lo8(3)
83 000a 86E4 ldi r24,lo8(70)
84 000c 90E0 ldi r25,hi8(70)
85 000e A0E0 ldi r26,hlo8(70)
86 0010 B0E0 ldi r27,hhi8(70)
87 /* #APP */
88 0012 FC01 movw r30, r24
89 0014 A093 5B00 sts 91, r26
90 0018 2093 6800 sts 104, r18
91 001c E895 spm
When I am calling this function for second time compiler produces this:
131 004e C8E6 ldi r28,lo8(104)
132 0050 D0E0 ldi r29,hi8(104)
133 0052 93E0 ldi r25,lo8(3)
134 0054 A8E6 ldi r26,lo8(104)
135 0056 B0E0 ldi r27,hi8(104)
136 .L8:
69:program.c ** // erase only main section (bootloader protection)
70:program.c ** address = 0; 71:program.c ** while ( address < 0x1dfff ){
72:program.c ** // Perform page erase
73:program.c ** boot_page_erase (address);
138 .LM10:
139 /* #APP */
140 0058 F901 movw r30, r18
141 005a 4093 5B00 sts 91, r20
142 005e 9093 0000 sts Y, r25 <<--PROBLEM
143 0062 E895 spm
Problem is in call sts Y,r25. Compiler loads 104 which is addres of SPM_REG but you cannot write to Y with sts only with st. If you look into boot.h there is output operators "=m". What do they stand for. I haven't found any documentatio for them. How can you force the compiler to do correct code.
Same problem is with boot_rww_enable();
Cheers,
Rok
ps: Bjorn Hasse showed me a solution and it is working.