There is simple code
usRDelay(17); Comm_LineOut_Port=SendData.B.Bit02; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit01; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit00; usRDelay(17); Comm_LineOut_Port=1;
I compiled it by keil for arm ver v4.53.0.0(coretex m3)
I got below assambly code
But I meet unexpected code line 0083ae
0083ae e00b B |L1.33736| |L1.33712| DCD TimeAlarmFlags |L1.33716| DCD PwrOn_Redy_Cnt |L1.33720| DCD TimeFlags |L1.33724| DCD PCU_C |L1.33728| DCD GPIO_C |L1.33732| DCD uR0 |L1.33736|
So fuction usRDelay(17); is more delayed. Why unexpected code is generated? What is that code? (p.s. TimeAlarmFlags is defined unsigned char by me, but why that is suddenly located?)
;;;7580 usRDelay(17); 008346 2011 MOVS r0,#0x11 008348 491e LDR r1,|L1.33732| 00834a 7008 STRB r0,[r1,#0] 00834c bf00 NOP |L1.33614| 00834e 481d LDR r0,|L1.33732| 008350 7800 LDRB r0,[r0,#0] ; uR0 008352 1e40 SUBS r0,r0,#1 008354 f01000ff ANDS r0,r0,#0xff 008358 491a LDR r1,|L1.33732| 00835a 7008 STRB r0,[r1,#0] 00835c d1f7 BNE |L1.33614| ;;;7581 Comm_LineOut_Port=SendData.B.Bit02; 00835e f89d0000 LDRB r0,[sp,#0] 008362 f3c00180 UBFX r1,r0,#2,#1 008366 4816 LDR r0,|L1.33728| 008368 6800 LDR r0,[r0,#0] ; GPIO_C 00836a 6800 LDR r0,[r0,#0] 00836c f36120cb BFI r0,r1,#11,#1 008370 4913 LDR r1,|L1.33728| 008372 6809 LDR r1,[r1,#0] ; GPIO_C 008374 6008 STR r0,[r1,#0] ;;;7582 usRDelay(17); 008376 2011 MOVS r0,#0x11 008378 4912 LDR r1,|L1.33732| 00837a 7008 STRB r0,[r1,#0] 00837c bf00 NOP |L1.33662| 00837e 4811 LDR r0,|L1.33732| 008380 7800 LDRB r0,[r0,#0] ; uR0 008382 1e40 SUBS r0,r0,#1 008384 f01000ff ANDS r0,r0,#0xff 008388 490e LDR r1,|L1.33732| 00838a 7008 STRB r0,[r1,#0] 00838c d1f7 BNE |L1.33662| ;;;7583 Comm_LineOut_Port=SendData.B.Bit01; 00838e f89d0000 LDRB r0,[sp,#0] 008392 f3c00140 UBFX r1,r0,#1,#1 008396 480a LDR r0,|L1.33728| 008398 6800 LDR r0,[r0,#0] ; GPIO_C 00839a 6800 LDR r0,[r0,#0] 00839c f36120cb BFI r0,r1,#11,#1 0083a0 4907 LDR r1,|L1.33728| 0083a2 6809 LDR r1,[r1,#0] ; GPIO_C 0083a4 6008 STR r0,[r1,#0] ;;;7584 usRDelay(17); 0083a6 2011 MOVS r0,#0x11 0083a8 4906 LDR r1,|L1.33732| 0083aa 7008 STRB r0,[r1,#0] 0083ac bf00 NOP |L1.33710| 0083ae e00b B |L1.33736| |L1.33712| DCD TimeAlarmFlags |L1.33716| DCD PwrOn_Redy_Cnt |L1.33720| DCD TimeFlags |L1.33724| DCD PCU_C |L1.33728| DCD GPIO_C |L1.33732| DCD uR0 |L1.33736| 0083c8 48fb LDR r0,|L1.34744| 0083ca 7800 LDRB r0,[r0,#0] ; uR0 0083cc 1e40 SUBS r0,r0,#1 0083ce f01000ff ANDS r0,r0,#0xff 0083d2 49f9 LDR r1,|L1.34744| 0083d4 7008 STRB r0,[r1,#0] 0083d6 d1ea BNE |L1.33710| ;;;7585 Comm_LineOut_Port=SendData.B.Bit00; 0083d8 f89d0000 LDRB r0,[sp,#0] 0083dc 49f7 LDR r1,|L1.34748| 0083de 6809 LDR r1,[r1,#0] ; GPIO_C 0083e0 6809 LDR r1,[r1,#0] 0083e2 f36021cb BFI r1,r0,#11,#1 0083e6 48f5 LDR r0,|L1.34748| 0083e8 6800 LDR r0,[r0,#0] ; GPIO_C 0083ea 6001 STR r1,[r0,#0] ;;;7586 usRDelay(17); 0083ec 2011 MOVS r0,#0x11 0083ee 49f2 LDR r1,|L1.34744| 0083f0 7008 STRB r0,[r1,#0] 0083f2 bf00 NOP |L1.33780| 0083f4 48f0 LDR r0,|L1.34744| 0083f6 7800 LDRB r0,[r0,#0] ; uR0 0083f8 1e40 SUBS r0,r0,#1 0083fa f01000ff ANDS r0,r0,#0xff 0083fe 49ee LDR r1,|L1.34744| 008400 7008 STRB r0,[r1,#0] 008402 d1f7 BNE |L1.33780| ;;;7587 ;;;7588 Comm_LineOut_Port=1; 008404 48ed LDR r0,|L1.34748| 008406 6800 LDR r0,[r0,#0] ; GPIO_C 008408 6800 LDR r0,[r0,#0] 00840a f4206000 BIC r0,r0,#0x800 00840e f5006000 ADD r0,r0,#0x800 008412 49ea LDR r1,|L1.34748| 008414 6809 LDR r1,[r1,#0] ; GPIO_C 008416 6008 STR r0,[r1,#0]
The first line of your unexpected code is a branch. Presumably for what follows in your source code snippet. What follows the branch is simply going to be some other part of the executable image.
So, nothing abnormal or strange. No reason to be concerned.
UINT8 Comm_Data(UINT8 Data) { volatile UINT8_B bR1,SendData; //UINT8 R0,R1; SendData.U=Data; //R0=0; //R1=1; __disable_irq(); CSP_PCU_Set_Direction_Type(PCU_C, PIN_11, PnCR_OUTPUT_PUSH_PULL);//ì¶œë ¥ Comm_LineOut_Port=0; usRDelay(50); Comm_LineOut_Port=1; CSP_PCU_Set_Direction_Type(PCU_C, PIN_11, PnCR_INPUT_LOGIC);//ìž…ë ¥ usRDelay(27); // Clock high time 4.0us __nop();__nop();__nop(); bR1.B.Bit07=Comm_LineIn_Port;//GPIO_A->PnODR.B.Bit08=R0;//GPIO_A->PnODR.B.Bit08^=1;// usRDelay(17); __nop();__nop();__nop(); bR1.B.Bit06=Comm_LineIn_Port;//GPIO_A->PnODR.B.Bit08=R1; usRDelay(17); __nop();__nop();__nop(); bR1.B.Bit05=Comm_LineIn_Port;// usRDelay(17); __nop();__nop();__nop(); bR1.B.Bit04=Comm_LineIn_Port;// usRDelay(17); __nop();__nop(); bR1.B.Bit03=Comm_LineIn_Port;// usRDelay(17); __nop();__nop(); bR1.B.Bit02=Comm_LineIn_Port;// usRDelay(17); __nop();__nop(); bR1.B.Bit01=Comm_LineIn_Port;// usRDelay(17); __nop();__nop(); bR1.B.Bit00=Comm_LineIn_Port;// usRDelay(17); usRDelay(7); CSP_PCU_Set_Direction_Type(PCU_C, PIN_11, PnCR_OUTPUT_PUSH_PULL);//ì¶œë ¥ Comm_LineOut_Port=SendData.B.Bit07; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit06; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit05; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit04; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit03; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit02; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit01; usRDelay(17); Comm_LineOut_Port=SendData.B.Bit00; usRDelay(17); Comm_LineOut_Port=1; CSP_PCU_Set_Direction_Type(PCU_C, PIN_11, PnCR_INPUT_LOGIC);//ìž…ë ¥ __enable_irq(); return (UINT8)bR1.U; }
Comm_Data PROC ;;;7519 ;;;7520 UINT8 Comm_Data(UINT8 Data) 008052 b51c PUSH {r2-r4,lr} ;;;7521 { 008054 4604 MOV r4,r0 ;;;7522 volatile UINT8_B bR1,SendData; ;;;7523 ;;;7524 //UINT8 R0,R1; ;;;7525 ;;;7526 SendData.U=Data; 008056 9400 STR r4,[sp,#0] ;;;7527 ;;;7528 //R0=0; ;;;7529 //R1=1; ;;;7530 ;;;7531 __disable_irq(); 008058 b672 CPSID i ;;;7532 ;;;7533 CSP_PCU_Set_Direction_Type(PCU_C, PIN_11, PnCR_OUTPUT_PUSH_PULL);//ì¶œë ¥ 00805a 2200 MOVS r2,#0 00805c 210b MOVS r1,#0xb 00805e 48d7 LDR r0,|L1.33724| 008060 6800 LDR r0,[r0,#0] ; PCU_C 008062 f7fffffe BL CSP_PCU_Set_Direction_Type ;;;7534 Comm_LineOut_Port=0; 008066 48d6 LDR r0,|L1.33728| 008068 6800 LDR r0,[r0,#0] ; GPIO_C 00806a 6800 LDR r0,[r0,#0] 00806c f4206000 BIC r0,r0,#0x800 008070 49d3 LDR r1,|L1.33728| 008072 6809 LDR r1,[r1,#0] ; GPIO_C 008074 6008 STR r0,[r1,#0] ;;;7535 ;;;7536 usRDelay(50); 008076 2032 MOVS r0,#0x32 008078 49d2 LDR r1,|L1.33732| 00807a 7008 STRB r0,[r1,#0] 00807c bf00 NOP |L1.32894| 00807e 48d1 LDR r0,|L1.33732| 008080 7800 LDRB r0,[r0,#0] ; uR0 008082 1e40 SUBS r0,r0,#1 008084 f01000ff ANDS r0,r0,#0xff 008088 49ce LDR r1,|L1.33732| 00808a 7008 STRB r0,[r1,#0] 00808c d1f7 BNE |L1.32894| ;;;7537 ;;;7538 Comm_LineOut_Port=1; 00808e 48cc LDR r0,|L1.33728| 008090 6800 LDR r0,[r0,#0] ; GPIO_C 008092 6800 LDR r0,[r0,#0] 008094 f4206000 BIC r0,r0,#0x800 008098 f5006000 ADD r0,r0,#0x800 00809c 49c8 LDR r1,|L1.33728| 00809e 6809 LDR r1,[r1,#0] ; GPIO_C 0080a0 6008 STR r0,[r1,#0] ;;;7539 ;;;7540 CSP_PCU_Set_Direction_Type(PCU_C, PIN_11, PnCR_INPUT_LOGIC);//ìž…ë ¥ 0080a2 2202 MOVS r2,#2 0080a4 210b MOVS r1,#0xb 0080a6 48c5 LDR r0,|L1.33724| 0080a8 6800 LDR r0,[r0,#0] ; PCU_C 0080aa f7fffffe BL CSP_PCU_Set_Direction_Type ;;;7541 usRDelay(27); // Clock high time 4.0us 0080ae 201b MOVS r0,#0x1b 0080b0 49c4 LDR r1,|L1.33732| 0080b2 7008 STRB r0,[r1,#0] 0080b4 bf00 NOP |L1.32950| 0080b6 48c3 LDR r0,|L1.33732| 0080b8 7800 LDRB r0,[r0,#0] ; uR0 0080ba 1e40 SUBS r0,r0,#1 0080bc f01000ff ANDS r0,r0,#0xff 0080c0 49c0 LDR r1,|L1.33732| 0080c2 7008 STRB r0,[r1,#0] 0080c4 d1f7 BNE |L1.32950| ;;;7542 __nop();__nop();__nop(); 0080c6 bf00 NOP 0080c8 bf00 NOP 0080ca bf00 NOP ;;;7543 bR1.B.Bit07=Comm_LineIn_Port;//GPIO_A->PnODR.B.Bit08=R0;//GPIO_A->PnODR.B.Bit08^=1;// 0080cc 48bc LDR r0,|L1.33728| 0080ce 6800 LDR r0,[r0,#0] ; GPIO_C 0080d0 6840 LDR r0,[r0,#4] 0080d2 f3c021c0 UBFX r1,r0,#11,#1 0080d6 f89d0004 LDRB r0,[sp,#4] 0080da f36110c7 BFI r0,r1,#7,#1 0080de 9001 STR r0,[sp,#4] ;;;7544 usRDelay(17); 0080e0 2011 MOVS r0,#0x11 0080e2 49b8 LDR r1,|L1.33732| 0080e4 7008 STRB r0,[r1,#0] 0080e6 bf00 NOP |L1.33000| 0080e8 48b6 LDR r0,|L1.33732| 0080ea 7800 LDRB r0,[r0,#0] ; uR0 0080ec 1e40 SUBS r0,r0,#1 0080ee f01000ff ANDS r0,r0,#0xff 0080f2 49b4 LDR r1,|L1.33732| 0080f4 7008 STRB r0,[r1,#0] 0080f6 d1f7 BNE |L1.33000| ;;;7545 __nop();__nop();__nop(); 0080f8 bf00 NOP 0080fa bf00 NOP 0080fc bf00 NOP ;;;7546 bR1.B.Bit06=Comm_LineIn_Port;//GPIO_A->PnODR.B.Bit08=R1; 0080fe 48b0 LDR r0,|L1.33728| 008100 6800 LDR r0,[r0,#0] ; GPIO_C 008102 6840 LDR r0,[r0,#4] 008104 f3c021c0 UBFX r1,r0,#11,#1 008108 f89d0004 LDRB r0,[sp,#4] 00810c f3611086 BFI r0,r1,#6,#1 008110 9001 STR r0,[sp,#4] ;;;7547 usRDelay(17); 008112 2011 MOVS r0,#0x11 008114 49ab LDR r1,|L1.33732| 008116 7008 STRB r0,[r1,#0] 008118 bf00 NOP |L1.33050| 00811a 48aa LDR r0,|L1.33732| 00811c 7800 LDRB r0,[r0,#0] ; uR0 00811e 1e40 SUBS r0,r0,#1 008120 f01000ff ANDS r0,r0,#0xff 008124 49a7 LDR r1,|L1.33732| 008126 7008 STRB r0,[r1,#0] 008128 d1f7 BNE |L1.33050| ;;;7548 __nop();__nop();__nop(); 00812a bf00 NOP 00812c bf00 NOP 00812e bf00 NOP
;;;7549 bR1.B.Bit05=Comm_LineIn_Port;// 008130 48a3 LDR r0,|L1.33728| 008132 6800 LDR r0,[r0,#0] ; GPIO_C 008134 6840 LDR r0,[r0,#4] 008136 f3c021c0 UBFX r1,r0,#11,#1 00813a f89d0004 LDRB r0,[sp,#4] 00813e f3611045 BFI r0,r1,#5,#1 008142 9001 STR r0,[sp,#4] ;;;7550 usRDelay(17); 008144 2011 MOVS r0,#0x11 008146 499f LDR r1,|L1.33732| 008148 7008 STRB r0,[r1,#0] 00814a bf00 NOP |L1.33100| 00814c 489d LDR r0,|L1.33732| 00814e 7800 LDRB r0,[r0,#0] ; uR0 008150 1e40 SUBS r0,r0,#1 008152 f01000ff ANDS r0,r0,#0xff 008156 499b LDR r1,|L1.33732| 008158 7008 STRB r0,[r1,#0] 00815a d1f7 BNE |L1.33100| ;;;7551 __nop();__nop();__nop(); 00815c bf00 NOP 00815e bf00 NOP 008160 bf00 NOP ;;;7552 bR1.B.Bit04=Comm_LineIn_Port;// 008162 4897 LDR r0,|L1.33728| 008164 6800 LDR r0,[r0,#0] ; GPIO_C 008166 6840 LDR r0,[r0,#4] 008168 f3c021c0 UBFX r1,r0,#11,#1 00816c f89d0004 LDRB r0,[sp,#4] 008170 f3611004 BFI r0,r1,#4,#1 008174 9001 STR r0,[sp,#4] ;;;7553 usRDelay(17); 008176 2011 MOVS r0,#0x11 008178 4992 LDR r1,|L1.33732| 00817a 7008 STRB r0,[r1,#0] 00817c bf00 NOP |L1.33150| 00817e 4891 LDR r0,|L1.33732| 008180 7800 LDRB r0,[r0,#0] ; uR0 008182 1e40 SUBS r0,r0,#1 008184 f01000ff ANDS r0,r0,#0xff 008188 498e LDR r1,|L1.33732| 00818a 7008 STRB r0,[r1,#0] 00818c d1f7 BNE |L1.33150| ;;;7554 __nop();__nop(); 00818e bf00 NOP 008190 bf00 NOP ;;;7555 bR1.B.Bit03=Comm_LineIn_Port;// 008192 488b LDR r0,|L1.33728| 008194 6800 LDR r0,[r0,#0] ; GPIO_C 008196 6840 LDR r0,[r0,#4] 008198 f3c021c0 UBFX r1,r0,#11,#1 00819c f89d0004 LDRB r0,[sp,#4] 0081a0 f36100c3 BFI r0,r1,#3,#1 0081a4 9001 STR r0,[sp,#4] ;;;7556 usRDelay(17); 0081a6 2011 MOVS r0,#0x11 0081a8 4986 LDR r1,|L1.33732| 0081aa 7008 STRB r0,[r1,#0] 0081ac bf00 NOP |L1.33198| 0081ae 4885 LDR r0,|L1.33732| 0081b0 7800 LDRB r0,[r0,#0] ; uR0 0081b2 1e40 SUBS r0,r0,#1 0081b4 f01000ff ANDS r0,r0,#0xff 0081b8 4982 LDR r1,|L1.33732| 0081ba 7008 STRB r0,[r1,#0] 0081bc d1f7 BNE |L1.33198| ;;;7557 __nop();__nop(); 0081be bf00 NOP 0081c0 bf00 NOP
. . . .. (skip). . . . . ;;;7581 Comm_LineOut_Port=SendData.B.Bit02; 00835e f89d0000 LDRB r0,[sp,#0] 008362 f3c00180 UBFX r1,r0,#2,#1 008366 4816 LDR r0,|L1.33728| 008368 6800 LDR r0,[r0,#0] ; GPIO_C 00836a 6800 LDR r0,[r0,#0] 00836c f36120cb BFI r0,r1,#11,#1 008370 4913 LDR r1,|L1.33728| 008372 6809 LDR r1,[r1,#0] ; GPIO_C 008374 6008 STR r0,[r1,#0] ;;;7582 usRDelay(17); 008376 2011 MOVS r0,#0x11 008378 4912 LDR r1,|L1.33732| 00837a 7008 STRB r0,[r1,#0] 00837c bf00 NOP |L1.33662| 00837e 4811 LDR r0,|L1.33732| 008380 7800 LDRB r0,[r0,#0] ; uR0 008382 1e40 SUBS r0,r0,#1 008384 f01000ff ANDS r0,r0,#0xff 008388 490e LDR r1,|L1.33732| 00838a 7008 STRB r0,[r1,#0] 00838c d1f7 BNE |L1.33662| ;;;7583 Comm_LineOut_Port=SendData.B.Bit01; 00838e f89d0000 LDRB r0,[sp,#0] 008392 f3c00140 UBFX r1,r0,#1,#1 008396 480a LDR r0,|L1.33728| 008398 6800 LDR r0,[r0,#0] ; GPIO_C 00839a 6800 LDR r0,[r0,#0] 00839c f36120cb BFI r0,r1,#11,#1 0083a0 4907 LDR r1,|L1.33728| 0083a2 6809 LDR r1,[r1,#0] ; GPIO_C 0083a4 6008 STR r0,[r1,#0] ;;;7584 usRDelay(17); 0083a6 2011 MOVS r0,#0x11 0083a8 4906 LDR r1,|L1.33732| 0083aa 7008 STRB r0,[r1,#0] 0083ac bf00 NOP |L1.33710| 0083ae e00b B |L1.33736| |L1.33712| DCD TimeAlarmFlags |L1.33716| DCD PwrOn_Redy_Cnt |L1.33720| DCD TimeFlags |L1.33724| DCD PCU_C |L1.33728| DCD GPIO_C |L1.33732| DCD uR0 |L1.33736| 0083c8 48fb LDR r0,|L1.34744| 0083ca 7800 LDRB r0,[r0,#0] ; uR0 0083cc 1e40 SUBS r0,r0,#1 0083ce f01000ff ANDS r0,r0,#0xff 0083d2 49f9 LDR r1,|L1.34744| 0083d4 7008 STRB r0,[r1,#0] 0083d6 d1ea BNE |L1.33710| ;;;7585 Comm_LineOut_Port=SendData.B.Bit00; 0083d8 f89d0000 LDRB r0,[sp,#0] 0083dc 49f7 LDR r1,|L1.34748| 0083de 6809 LDR r1,[r1,#0] ; GPIO_C 0083e0 6809 LDR r1,[r1,#0] 0083e2 f36021cb BFI r1,r0,#11,#1 0083e6 48f5 LDR r0,|L1.34748| 0083e8 6800 LDR r0,[r0,#0] ; GPIO_C 0083ea 6001 STR r1,[r0,#0] ;;;7586 usRDelay(17); 0083ec 2011 MOVS r0,#0x11 0083ee 49f2 LDR r1,|L1.34744| 0083f0 7008 STRB r0,[r1,#0] 0083f2 bf00 NOP |L1.33780| 0083f4 48f0 LDR r0,|L1.34744| 0083f6 7800 LDRB r0,[r0,#0] ; uR0 0083f8 1e40 SUBS r0,r0,#1 0083fa f01000ff ANDS r0,r0,#0xff 0083fe 49ee LDR r1,|L1.34744| 008400 7008 STRB r0,[r1,#0] 008402 d1f7 BNE |L1.33780| ;;;7587 ;;;7588 Comm_LineOut_Port=1; 008404 48ed LDR r0,|L1.34748| 008406 6800 LDR r0,[r0,#0] ; GPIO_C 008408 6800 LDR r0,[r0,#0] 00840a f4206000 BIC r0,r0,#0x800 00840e f5006000 ADD r0,r0,#0x800 008412 49ea LDR r1,|L1.34748| 008414 6809 LDR r1,[r1,#0] ; GPIO_C 008416 6008 STR r0,[r1,#0] ;;;7589 CSP_PCU_Set_Direction_Type(PCU_C, PIN_11, PnCR_INPUT_LOGIC);//ìž…ë ¥ 008418 2202 MOVS r2,#2 00841a 210b MOVS r1,#0xb 00841c 48e8 LDR r0,|L1.34752| 00841e 6800 LDR r0,[r0,#0] ; PCU_C 008420 f7fffffe BL CSP_PCU_Set_Direction_Type ;;;7590 ;;;7591 __enable_irq(); 008424 b662 CPSIE i ;;;7592 ;;;7593 return (UINT8)bR1.U; 008426 f89d0004 LDRB r0,[sp,#4] ;;;7594 ;;;7595 } 00842a bd1c POP {r2-r4,pc} ;;;7596 ENDP