I would normally use Eclipse avr-gcc plugin and (avr-gcc compiler from zaks https://blog.zakkemble.net/avr-gcc-builds) to develop firmware for AVR MCU. The MCU ATmega328PB has extra timers (3,4), SPI1, TWI1 etc. I am experiencing situation where after compiling the code, any of these extra peripherals' interrupt vectors will not be handled, it does trauncate, the avr-gcc compiler only handles the default 25 vectors of the ATmega328P.
The eclipse avr-gcc (2.42) originally does not support ATmega328PB, I manually generated my header file from the iom328pb.h and also included the neccesary files as instructed here https://gist.github.com/goncalor/51e1c8038cc058b4379552477255b4e1
yet, whenever I configured any of these interrupts from the additional peripherals of the MCU, the interrupt would be registered as <__bad_interrupt>.
The question, how do I solve or does anyone knows a solution?
I tested TIMER3 and 4. I have configured TIMER3 and then TIMER4 OVERFLOW to generate 1ms on 16MHz Prescaler 64 and loaded TCNT3 = 65535-250/ TCNT4= 65535-250.
The interrupts refused to triger, and probing from the .lss file. It shows only the default vectors of ATmega328P.
Initially, I though it has to do with the way I renamed all interrupt vectors in my custome header file; which typically, TIMER1 and TIMER3 overflow vector are:
00000000 <__vectors>:
0: 38 c0 rjmp .+112 ; 0x72 <__ctors_end>
2: 00 00 nop
4: 5e c0 rjmp .+188 ; 0xc2 <__bad_interrupt>
6: 00 00 nop
8: 5c c0 rjmp .+184 ; 0xc2 <__bad_interrupt>
a: 00 00 nop
c: 5a c0 rjmp .+180 ; 0xc2 <__bad_interrupt>
e: 00 00 nop
10: 58 c0 rjmp .+176 ; 0xc2 <__bad_interrupt>
12: 00 00 nop
14: 56 c0 rjmp .+172 ; 0xc2 <__bad_interrupt>
16: 00 00 nop
18: 54 c0 rjmp .+168 ; 0xc2 <__bad_interrupt>
1a: 00 00 nop
1c: 52 c0 rjmp .+164 ; 0xc2 <__bad_interrupt>
1e: 00 00 nop
20: 50 c0 rjmp .+160 ; 0xc2 <__bad_interrupt>
22: 00 00 nop
24: 4e c0 rjmp .+156 ; 0xc2 <__bad_interrupt>
26: 00 00 nop
28: 4c c0 rjmp .+152 ; 0xc2 <__bad_interrupt>
2a: 00 00 nop
2c: 4a c0 rjmp .+148 ; 0xc2 <__bad_interrupt>
2e: 00 00 nop
30: 48 c0 rjmp .+144 ; 0xc2 <__bad_interrupt>
32: 00 00 nop
34: 17 c5 rjmp .+2606 ; 0xa64 <__vector_13>
36: 00 00 nop
38: 44 c0 rjmp .+136 ; 0xc2 <__bad_interrupt>
3a: 00 00 nop
3c: 42 c0 rjmp .+132 ; 0xc2 <__bad_interrupt>
3e: 00 00 nop
40: 40 c0 rjmp .+128 ; 0xc2 <__bad_interrupt>
42: 00 00 nop
44: 3e c0 rjmp .+124 ; 0xc2 <__bad_interrupt>
46: 00 00 nop
48: 79 c4 rjmp .+2290 ; 0x93c <__vector_18>
4a: 00 00 nop
4c: 99 c4 rjmp .+2354 ; 0x980 <__vector_19>
4e: 00 00 nop
50: 38 c0 rjmp .+112 ; 0xc2 <__bad_interrupt>
52: 00 00 nop
54: bf c4 rjmp .+2430 ; 0x9d4 <__vector_21>
56: 00 00 nop
58: 34 c0 rjmp .+104 ; 0xc2 <__bad_interrupt>
5a: 00 00 nop
5c: 32 c0 rjmp .+100 ; 0xc2 <__bad_interrupt>
5e: 00 00 nop
60: 30 c0 rjmp .+96 ; 0xc2 <__bad_interrupt>
62: 00 00 nop
64: 2e c0 rjmp .+92 ; 0xc2 <__bad_interrupt>
void __attribute__ ((__INTR_ATTRS))HTIM1_OVR_Handler(void) __asm__\
( "__vector_13" ) __attribute__\
(( __signal__ , __used__ , __externally_visible__));
void __attribute__ ((__INTR_ATTRS))HTIM3_OVR_Handler(void) __asm__\
( "__vector_35" ) __attribute__\
(( __signal__ , __used__ , __externally_visible__));
and in my application .c/.cpp file
void HTIM1_OVR_Handler(void){
PORTB ^=(1<<5);
}
void HTIM3_OVR_Handler(void){
PORTB ^=(1<<1);
}
I reverted to the traditional ISR(TIMER3_OVF_vect){ } and ISR(TIMER4_OVF_vect){ }, yet no changes. I tried the same code with the renamed vectors names in Atmel Studio 7, everything work fine.
-Wmisspelled-isr.