[avr-libc-dev] Re: [bug #28108] bug with winavr20090313

[David Brown]

Hi Brn,

This is a closer but it is still not enough to be able to help you.  We 
need a code /snippet/ - cut down the code to the minimal necessary so 
that we can compile the code and see the problem.  Your code below won't 
compile because it is missing some defines, and it has lots more code 
making it hard to see where the problem might lie.  It could well be 
that your code here (once you've included the missing defines) /is/ the 
minimal code that shows the error, in which case adding the missing 
parts should be easy enough.

You are also missing the compile flags and the compiler version. 
Without these, we can't replicate the error or give useful advice (such 
as alternative compiler flags to try).

mvh.,

David



Brn Gomes wrote:
> Follow-up Comment #1, bug #28108 (project avr-libc):
>
> If I want a CAN msg with ID=0xFDFFFFF0 on msg2
>
> it sends 
>
> ID=0xFDFDFFF0.... 
>
> #define TEST_CAN_MSG1_ID 0xFDFFFFE0L 
> #define TEST_CAN_MSG2_ID 0xFDFFFFD0L 
> #define TEST_CAN_MSG3_ID 0xFDFFFFC0L 
>
> #define TEST_CAN_TX_MSG0_ID TEST_CAN_MSG3_ID 
> #define TEST_CAN_TX_MSG1_ID TEST_CAN_MSG1_ID 
> #define TEST_CAN_TX_MSG2_ID TEST_CAN_MSG2_ID 
>
> typedef struct 
> { 
> uint32_t id; 
> uint32_t id_msk; 
> uint8_t *data_ptr; 
> uint8_t status; 
> uint8_t proc; 
> void *action_ptr; 
> uint8_t max_size; 
> uint8_t size; 
> uint8_t mob_num; 
> uint8_t wdlc; 
> uint8_t mob_assign; 
> } can_msg_t; 
>
> static volatile can_msg_t can_tx_msg0; 
> static volatile can_msg_t can_tx_msg1; 
> static volatile can_msg_t can_tx_msg2; 
>
> static volatile uint8_t can_buf_out_msg0[10]; 
> static volatile uint8_t can_buf_out_msg1[10]; 
> static volatile uint8_t can_buf_out_msg2[10]; 
>
>
> funtion called in C code: 
>
> void InitCan(void){ 
>
> /* 
> * Msg 0 
> */ 
> can_tx_msg0.id = TEST_CAN_TX_MSG0_ID; 
> can_tx_msg0.data_ptr = (uint8_t *) can_buf_out_msg0; 
> can_tx_msg0.max_size = 8; 
> can_tx_msg0.size = 8; 
> can_tx_msg0.status = NOT_SENT; 
> can_tx_msg0.mob_num = 0; 
> can_tx_msg0.mob_assign = FIXED_MOB; 
>
> /* send dummy data... */ 
> can_buf_out_msg0[0] = 0; 
> can_buf_out_msg0[1] = 0; 
> can_buf_out_msg0[2] = 0; 
> can_buf_out_msg0[3] = 0; 
> can_buf_out_msg0[4] = 0xDE; 
> can_buf_out_msg0[5] = 0xAD; 
> can_buf_out_msg0[6] = 0xFA; 
> can_buf_out_msg0[7] = 0xCE; 
>
> /* 
> * Msg 1 
> */ 
> can_tx_msg1.id = TEST_CAN_TX_MSG1_ID; 
> can_tx_msg1.data_ptr = (uint8_t *) can_buf_out_msg1; 
> can_tx_msg1.max_size = 8; 
> can_tx_msg1.size = 8; 
> can_tx_msg1.status = NOT_SENT; 
> can_tx_msg1.mob_assign = FLOATING_MOB; 
>
> /* send dummy data... */ 
> can_buf_out_msg1[0] = 0xDE; 
> can_buf_out_msg1[1] = 0xAD; 
> can_buf_out_msg1[2] = 0xFA; 
> can_buf_out_msg1[3] = 0xCE; 
> can_buf_out_msg1[4] = 0; 
> can_buf_out_msg1[5] = 0; 
> can_buf_out_msg1[6] = 0; 
> can_buf_out_msg1[7] = 0; 
>
> /* 
> * Msg 2 
> */ 
> can_tx_msg2.id = TEST_CAN_TX_MSG2_ID; 
> can_tx_msg2.data_ptr = (uint8_t *) can_buf_out_msg2; 
> can_tx_msg2.max_size = 8; 
> can_tx_msg2.size = 8; 
> can_tx_msg2.status = NOT_SENT; 
> can_tx_msg2.mob_assign = FLOATING_MOB; 
>
> /* send dummy data... */ 
> can_buf_out_msg2[0] = 0xDE; 
> can_buf_out_msg2[1] = 0xAD; 
> can_buf_out_msg2[2] = 0xFA; 
> can_buf_out_msg2[3] = 0xCE; 
> can_buf_out_msg2[4] = 0; 
> can_buf_out_msg2[5] = 0; 
> can_buf_out_msg2[6] = 0; 
> can_buf_out_msg2[7] = 0; 
>
> ......-----------......
>
> the .lss file generated with the error at line 724:
>
> can_tx_msg2.id = TEST_CAN_TX_MSG2_ID; 
> 71a:	00 ed ldi	r16, 0xD0	; 208 
> 71c:	e0 2e mov	r14, r16 
> 71e:	0f ef ldi	r16, 0xFF	; 255 
> 720:	f0 2e mov	r15, r16 
> 722:	0f ef ldi	r16, 0xFF	; 255 
> 724:	00 2f mov	r16, r16 
> 726:	0d ef ldi	r16, 0xFD	; 253 
> 728:	10 2f mov	r17, r16 
> 72a:	e0 92 0f 02 sts	0x020F, r14 
> 72e:	f0 92 10 02 sts	0x0210, r15 
> 732:	00 93 11 02 sts	0x0211, r16 
> 736:	10 93 12 02 sts	0x0212, r17 
> can_tx_msg2.data_ptr = (uint8_t *) can_buf_out_msg2; 
> 73a:	86 e3 ldi	r24, 0x36	; 54 
> 73c:	92 e0 ldi	r25, 0x02	; 2 
> 73e:	90 93 18 02 sts	0x0218, r25 
> 742:	80 93 17 02 sts	0x0217, r24 
> can_tx_msg2.max_size = 8; 
> 746:	60 93 1d 02 sts	0x021D, r22 
> can_tx_msg2.size = 8; 
> 74a:	60 93 1e 02 sts	0x021E, r22 
> can_tx_msg2.status = NOT_SENT; 
> 74e:	70 93 19 02 sts	0x0219, r23