Anthony,
I see no problem with payload being sent through
DPL/DPH/B. It is properly assigned when sending in
cc2430_rf_send() and properly read and put on stack when
receiving in cc2430_rf_send_b(). Are you messing up DPTR
or B or the stack in your adapted __sdcc_banked_call
except the one push of the current bank?
Btw. Did you know that sdcc can also printf pointers
with %p?
Maarten
> I'm using:
>
> u...@instant-contiki:~/contiki-2.x/examples/udp-ipv6$ sdcc -v
> SDCC : mcs51/gbz80/z80/avr/ds390/pic16/pic14/TININative/xa51/ds400/hc08
> 2.9.4 #5556 (Oct 29 2009) (UNIX)
>
>
> compile flags are:
>
> sdcc --codeseg BANK1 --std-c99 --model-large --stack-auto -c
> ../../cpu/cc2430/dev/cc2430_rf.c -o obj-brione/cc2430_rf.o
> sdcc --codeseg HOME --std-c99 --model-large --stack-auto -c
> ../../cpu/cc2430/dev/cc2430_rf_intr.c -o obj-brione/cc2430_rf_intr.o
>
> In the following routines, I see incorrect variable passing on the stack.
>
> int cc2430_rf_send(void *data, unsigned short len);
> int cc2430_rf_send_b (void *data, unsigned short len) __banked;
>
> int
> cc2430_rf_send(void *payload, unsigned short payload_len)
> {
> printf("sending %x bytes.\n",payload_len);
> printf("payload addr %08lx.\n", payload);
> return cc2430_rf_send_b(payload, payload_len);
> }
>
>
>
>
> int
> cc2430_rf_send_b(void *payload, unsigned short payload_len) __banked
> {
> uint8_t i, counter;
> printf("sending %x bytes.\n",payload_len);
> printf("payload addr %08lx.\n", payload);
> }
>
> In the assembly for cc2430_rf_send the payload arg is mov'd to dpl,
> dph, b instead of pushed on the stack;
> 996
> ;------------------------------------------------------------
> 997 ;Allocation info for local variables in
> function 'cc2430_rf_send'
> 998
> ;------------------------------------------------------------
> 999 ;payload_len Allocated to
> stack - offset -4
> 1000 ;payload Allocated to
> registers r2 r3 r4
> 1001
> ;------------------------------------------------------------
> 1002 ;
> ../../cpu/cc2430/dev/cc2430_rf_intr.c:123: cc2430_rf_send(void *payload,
> unsigned short payload_len)
> 1003 ;
> -----------------------------------------
> 1004 ; function cc2430_rf_send
> 1005 ;
> -----------------------------------------
> 01E7 1006 _cc2430_rf_send:
>
> <calls to printf deleted>
>
> 0240 D0 04 1054 pop ar4
> 0242 D0 03 1055 pop ar3
> 0244 D0 02 1056 pop ar2
> 1057 ;
> ../../cpu/cc2430/dev/cc2430_rf_intr.c:127: return
> cc2430_rf_send_b(payload, payload_len);
> 0246 E5*00 1058 mov a,_bp
> 0248 24 FC 1059 add a,#0xfc
> 024A F8 1060 mov r0,a
> 024B E6 1061 mov a,@r0
> 024C C0 E0 1062 push acc
> 024E 08 1063 inc r0
> 024F E6 1064 mov a,@r0
> 0250 C0 E0 1065 push acc
> 0252 8A 82 1066 mov dpl,r2
> 0254 8B 83 1067 mov dph,r3
> 0256 8C F0 1068 mov b,r4
> 0258 78r00 1069 mov r0,#_cc2430_rf_send_b
> 025A 79s00 1070 mov r1,#(_cc2430_rf_send_b
> >> 8)
> 025C 7As00 1071 mov r2,#(_cc2430_rf_send_b
> >> 16)
> 025E 12s00r00 1072 lcall __sdcc_banked_call
>
>
>
>
> 1087
> ;------------------------------------------------------------
> 1088 ;Allocation info for local variables in
> function 'cc2430_rf_send_b'
> 1089
> ;------------------------------------------------------------
> 1090 ;payload_len Allocated to
> stack - offset -4
> 1091 ;payload Allocated to
> stack - offset 1
> 1092 ;i Allocated to
> registers r5
> 1093 ;counter Allocated to
> registers r2
> 1094
> ;------------------------------------------------------------
> 1095 ;
> ../../cpu/cc2430/dev/cc2430_rf.c:158: cc2430_rf_send_b(void *payload,
> unsigned short payload_len) __banked
> 1096 ;
> -----------------------------------------
> 1097 ; function cc2430_rf_send_b
> 1098 ;
> -----------------------------------------
> 0254 1099 _cc2430_rf_send_b:
> 0254 C0*00 1100 push _bp
> 0256 85 81*00 1101 mov _bp,sp
> 0259 C0 82 1102 push dpl
> 025B C0 83 1103 push dph
> 025D C0 F0 1104 push b
> 1105 ;
> ../../cpu/cc2430/dev/cc2430_rf.c:161: printf("sending %x
> bytes.\n",payload_len);
> 025F E5*00 1106 mov a,_bp
> 0261 24 FC 1107 add a,#0xfc
> 0263 F8 1108 mov r0,a
> 0264 E6 1109 mov a,@r0
> 0265 C0 E0 1110 push acc
> 0267 08 1111 inc r0
> 0268 E6 1112 mov a,@r0
> 0269 C0 E0 1113 push acc
> 026B 74r0A 1114 mov a,#__str_0
>
>
> Program output is
> sending 2d bytes.
> payload_len addr 40006b00.
> sending 9000 bytes.
> payload addr 00e09100.
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