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This is a communication function.
#define rrD_100us 548 volatile UINT16 uRR0; #define usDelay(TimeVal) {uRR0=TimeVal; while(--uRR0);}// void PJ_Comm_Data(void) { Put_Comm__Low();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_High();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit07();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit06();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit05();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit04();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit03();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit02();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit01();//Port OnOff usDelay(rrD_100us);//100us Put_Comm_Bit00();//Port OnOff usDelay(rrD_100us);//100us PortC1_INPUT();//Port Input Control usDelay(rrD_100us);//100us Get_Comm_Bit07();//Port Input usDelay(rrD_100us);//100us Get_Comm_Bit06();//Port Input usDelay(rrD_100us);//100us Get_Comm_Bit05();//Port Input usDelay(rrD_100us);//100us Get_Comm_Bit04();//Port Input usDelay(rrD_100us);//100us Get_Comm_Bit03();//Port Input usDelay(rrD_100us);//100us Get_Comm_Bit02();//Port Input usDelay(rrD_100us);//100us Get_Comm_Bit01();//Port Input usDelay(rrD_100us);//100us Get_Comm_Bit00();//Port Input usDelay(rrD_100us);//100us PortC1_PUSHPull();//Port Output Control Put_Comm_High();//Port OnOff }
In the assembler, this is converted.
PJ_Comm_Data PROC ;;;5594 ;;;5595 void PJ_Comm_Data(void) 00512e b510 PUSH {r4,lr} ;;;5596 { ;;;5597 Put_Comm__Low();//Port OnOff 005130 f7fffffe BL Put_Comm__Low ;;;5598 usDelay(rrD_100us);//100us 005134 f44f7009 MOV r0,#0x224 005138 490b LDR r1,|L1.20840| 00513a 8008 STRH r0,[r1,#0] 00513c bf00 NOP |L1.20798| 00513e 480a LDR r0,|L1.20840| 005140 8800 LDRH r0,[r0,#0] ; uRR0 005142 1e40 SUBS r0,r0,#1 005144 0400 LSLS r0,r0,#16 005146 0c00 LSRS r0,r0,#16 005148 4907 LDR r1,|L1.20840| 00514a 8008 STRH r0,[r1,#0] 00514c d1f7 BNE |L1.20798| ;;;5599 Put_Comm_High();//Port OnOff 00514e f7fffffe BL Put_Comm_High ;;;5600 usDelay(rrD_100us);//100us 005152 e00b B |L1.20844| |L1.20820| DCD PCU_D |L1.20824| DCD GPIO_C |L1.20828| DCD PCU_C |L1.20832| DCD Comm_In_Buf |L1.20836| DCD Comm_Out_Buf |L1.20840| DCD uRR0 |L1.20844| 00516c f44f7009 MOV r0,#0x224 005170 49fe LDR r1,|L1.21868| 005172 8008 STRH r0,[r1,#0] 005174 bf00 NOP |L1.20854| 005176 48fd LDR r0,|L1.21868| 005178 8800 LDRH r0,[r0,#0] ; uRR0 00517a 1e40 SUBS r0,r0,#1 00517c 0400 LSLS r0,r0,#16 00517e 0c00 LSRS r0,r0,#16 005180 49fa LDR r1,|L1.21868| 005182 8008 STRH r0,[r1,#0] 005184 d1f7 BNE |L1.20854| ;;;5601 ;;;5602 Put_Comm_Bit07();//Port OnOff 005186 f7fffffe BL Put_Comm_Bit07 ;;;5603 usDelay(rrD_100us);//100us 00518a f44f7009 MOV r0,#0x224 00518e 49f7 LDR r1,|L1.21868| 005190 8008 STRH r0,[r1,#0] 005192 bf00 NOP |L1.20884| 005194 48f5 LDR r0,|L1.21868| 005196 8800 LDRH r0,[r0,#0] ; uRR0 005198 1e40 SUBS r0,r0,#1 00519a 0400 LSLS r0,r0,#16 00519c 0c00 LSRS r0,r0,#16 00519e 49f3 LDR r1,|L1.21868| 0051a0 8008 STRH r0,[r1,#0] 0051a2 d1f7 BNE |L1.20884| ;;;5604 Put_Comm_Bit06();//Port OnOff 0051a4 f7fffffe BL Put_Comm_Bit06 ;;;5605 usDelay(rrD_100us);//100us 0051a8 f44f7009 MOV r0,#0x224 0051ac 49ef LDR r1,|L1.21868| 0051ae 8008 STRH r0,[r1,#0] 0051b0 bf00 NOP |L1.20914| 0051b2 48ee LDR r0,|L1.21868| 0051b4 8800 LDRH r0,[r0,#0] ; uRR0 0051b6 1e40 SUBS r0,r0,#1 0051b8 0400 LSLS r0,r0,#16 0051ba 0c00 LSRS r0,r0,#16 0051bc 49eb LDR r1,|L1.21868| 0051be 8008 STRH r0,[r1,#0] 0051c0 d1f7 BNE |L1.20914| ;;;5606 Put_Comm_Bit05();//Port OnOff 0051c2 f7fffffe BL Put_Comm_Bit05 ;;;5607 usDelay(rrD_100us);//100us 0051c6 f44f7009 MOV r0,#0x224 0051ca 49e8 LDR r1,|L1.21868| 0051cc 8008 STRH r0,[r1,#0] 0051ce bf00 NOP |L1.20944| 0051d0 48e6 LDR r0,|L1.21868| 0051d2 8800 LDRH r0,[r0,#0] ; uRR0 0051d4 1e40 SUBS r0,r0,#1 0051d6 0400 LSLS r0,r0,#16 0051d8 0c00 LSRS r0,r0,#16 0051da 49e4 LDR r1,|L1.21868| 0051dc 8008 STRH r0,[r1,#0] 0051de d1f7 BNE |L1.20944| ;;;5608 Put_Comm_Bit04();//Port OnOff 0051e0 f7fffffe BL Put_Comm_Bit04 ;;;5609 usDelay(rrD_100us);//100us 0051e4 f44f7009 MOV r0,#0x224 0051e8 49e0 LDR r1,|L1.21868| 0051ea 8008 STRH r0,[r1,#0] 0051ec bf00 NOP |L1.20974| 0051ee 48df LDR r0,|L1.21868| 0051f0 8800 LDRH r0,[r0,#0] ; uRR0 0051f2 1e40 SUBS r0,r0,#1 0051f4 0400 LSLS r0,r0,#16 0051f6 0c00 LSRS r0,r0,#16 0051f8 49dc LDR r1,|L1.21868| 0051fa 8008 STRH r0,[r1,#0] 0051fc d1f7 BNE |L1.20974| ;;;5610 Put_Comm_Bit03();//Port OnOff 0051fe f7fffffe BL Put_Comm_Bit03 ;;;5611 usDelay(rrD_100us);//100us 005202 f44f7009 MOV r0,#0x224 005206 49d9 LDR r1,|L1.21868| 005208 8008 STRH r0,[r1,#0] 00520a bf00 NOP |L1.21004| 00520c 48d7 LDR r0,|L1.21868| 00520e 8800 LDRH r0,[r0,#0] ; uRR0 005210 1e40 SUBS r0,r0,#1 005212 0400 LSLS r0,r0,#16 005214 0c00 LSRS r0,r0,#16 005216 49d5 LDR r1,|L1.21868| 005218 8008 STRH r0,[r1,#0] 00521a d1f7 BNE |L1.21004| ;;;5612 Put_Comm_Bit02();//Port OnOff 00521c f7fffffe BL Put_Comm_Bit02 ;;;5613 usDelay(rrD_100us);//100us 005220 f44f7009 MOV r0,#0x224 005224 49d1 LDR r1,|L1.21868| 005226 8008 STRH r0,[r1,#0] 005228 bf00 NOP |L1.21034| 00522a 48d0 LDR r0,|L1.21868| 00522c 8800 LDRH r0,[r0,#0] ; uRR0 00522e 1e40 SUBS r0,r0,#1 005230 0400 LSLS r0,r0,#16 005232 0c00 LSRS r0,r0,#16 005234 49cd LDR r1,|L1.21868| 005236 8008 STRH r0,[r1,#0] 005238 d1f7 BNE |L1.21034| ;;;5614 Put_Comm_Bit01();//Port OnOff 00523a f7fffffe BL Put_Comm_Bit01 ;;;5615 usDelay(rrD_100us);//100us 00523e f44f7009 MOV r0,#0x224 005242 49ca LDR r1,|L1.21868| 005244 8008 STRH r0,[r1,#0] 005246 bf00 NOP |L1.21064| 005248 48c8 LDR r0,|L1.21868| 00524a 8800 LDRH r0,[r0,#0] ; uRR0 00524c 1e40 SUBS r0,r0,#1 00524e 0400 LSLS r0,r0,#16 005250 0c00 LSRS r0,r0,#16 005252 49c6 LDR r1,|L1.21868| 005254 8008 STRH r0,[r1,#0] 005256 d1f7 BNE |L1.21064| ;;;5616 Put_Comm_Bit00();//Port OnOff 005258 f7fffffe BL Put_Comm_Bit00 ;;;5617 usDelay(rrD_100us);//100us 00525c f44f7009 MOV r0,#0x224 005260 49c2 LDR r1,|L1.21868| 005262 8008 STRH r0,[r1,#0] 005264 bf00 NOP |L1.21094| 005266 48c1 LDR r0,|L1.21868| 005268 8800 LDRH r0,[r0,#0] ; uRR0 00526a 1e40 SUBS r0,r0,#1 00526c 0400 LSLS r0,r0,#16 00526e 0c00 LSRS r0,r0,#16 005270 49be LDR r1,|L1.21868| 005272 8008 STRH r0,[r1,#0] 005274 d1f7 BNE |L1.21094| ;;;5618 ;;;5619 PortC1_INPUT();//Port Input Control 005276 f7fffffe BL PortC1_INPUT ;;;5620 usDelay(rrD_100us);//100us 00527a f44f7009 MOV r0,#0x224 00527e 49bb LDR r1,|L1.21868| 005280 8008 STRH r0,[r1,#0] 005282 bf00 NOP |L1.21124| 005284 48b9 LDR r0,|L1.21868| 005286 8800 LDRH r0,[r0,#0] ; uRR0 005288 1e40 SUBS r0,r0,#1 00528a 0400 LSLS r0,r0,#16 00528c 0c00 LSRS r0,r0,#16 00528e 49b7 LDR r1,|L1.21868| 005290 8008 STRH r0,[r1,#0] 005292 d1f7 BNE |L1.21124| ;;;5621 Get_Comm_Bit07();//Port Input 005294 f7fffffe BL Get_Comm_Bit07 ;;;5622 usDelay(rrD_100us);//100us 005298 f44f7009 MOV r0,#0x224 00529c 49b3 LDR r1,|L1.21868| 00529e 8008 STRH r0,[r1,#0] 0052a0 bf00 NOP |L1.21154| 0052a2 48b2 LDR r0,|L1.21868| 0052a4 8800 LDRH r0,[r0,#0] ; uRR0 0052a6 1e40 SUBS r0,r0,#1 0052a8 0400 LSLS r0,r0,#16 0052aa 0c00 LSRS r0,r0,#16 0052ac 49af LDR r1,|L1.21868| 0052ae 8008 STRH r0,[r1,#0] 0052b0 d1f7 BNE |L1.21154| ;;;5623 Get_Comm_Bit06();//Port Input 0052b2 f7fffffe BL Get_Comm_Bit06 ;;;5624 usDelay(rrD_100us);//100us 0052b6 f44f7009 MOV r0,#0x224 0052ba 49ac LDR r1,|L1.21868| 0052bc 8008 STRH r0,[r1,#0] 0052be bf00 NOP |L1.21184| 0052c0 48aa LDR r0,|L1.21868| 0052c2 8800 LDRH r0,[r0,#0] ; uRR0 0052c4 1e40 SUBS r0,r0,#1 0052c6 0400 LSLS r0,r0,#16 0052c8 0c00 LSRS r0,r0,#16 0052ca 49a8 LDR r1,|L1.21868| 0052cc 8008 STRH r0,[r1,#0] 0052ce d1f7 BNE |L1.21184| ;;;5625 Get_Comm_Bit05();//Port Input 0052d0 f7fffffe BL Get_Comm_Bit05 ;;;5626 usDelay(rrD_100us);//100us 0052d4 f44f7009 MOV r0,#0x224 0052d8 49a4 LDR r1,|L1.21868| 0052da 8008 STRH r0,[r1,#0] 0052dc bf00 NOP |L1.21214| 0052de 48a3 LDR r0,|L1.21868| 0052e0 8800 LDRH r0,[r0,#0] ; uRR0 0052e2 1e40 SUBS r0,r0,#1 0052e4 0400 LSLS r0,r0,#16 0052e6 0c00 LSRS r0,r0,#16 0052e8 49a0 LDR r1,|L1.21868| 0052ea 8008 STRH r0,[r1,#0] 0052ec d1f7 BNE |L1.21214| ;;;5627 Get_Comm_Bit04();//Port Input 0052ee f7fffffe BL Get_Comm_Bit04 ;;;5628 usDelay(rrD_100us);//100us 0052f2 f44f7009 MOV r0,#0x224 0052f6 499d LDR r1,|L1.21868| 0052f8 8008 STRH r0,[r1,#0] 0052fa bf00 NOP |L1.21244| 0052fc 489b LDR r0,|L1.21868| 0052fe 8800 LDRH r0,[r0,#0] ; uRR0 005300 1e40 SUBS r0,r0,#1 005302 0400 LSLS r0,r0,#16 005304 0c00 LSRS r0,r0,#16 005306 4999 LDR r1,|L1.21868| 005308 8008 STRH r0,[r1,#0] 00530a d1f7 BNE |L1.21244| ;;;5629 Get_Comm_Bit03();//Port Input 00530c f7fffffe BL Get_Comm_Bit03 ;;;5630 usDelay(rrD_100us);//100us 005310 f44f7009 MOV r0,#0x224 005314 4995 LDR r1,|L1.21868| 005316 8008 STRH r0,[r1,#0] 005318 bf00 NOP |L1.21274| 00531a 4894 LDR r0,|L1.21868| 00531c 8800 LDRH r0,[r0,#0] ; uRR0 00531e 1e40 SUBS r0,r0,#1 005320 0400 LSLS r0,r0,#16 005322 0c00 LSRS r0,r0,#16 005324 4991 LDR r1,|L1.21868| 005326 8008 STRH r0,[r1,#0] 005328 d1f7 BNE |L1.21274| ;;;5631 Get_Comm_Bit02();//Port Input 00532a f7fffffe BL Get_Comm_Bit02 ;;;5632 usDelay(rrD_100us);//100us 00532e f44f7009 MOV r0,#0x224 005332 498e LDR r1,|L1.21868| 005334 8008 STRH r0,[r1,#0] 005336 bf00 NOP |L1.21304| 005338 488c LDR r0,|L1.21868| 00533a 8800 LDRH r0,[r0,#0] ; uRR0 00533c 1e40 SUBS r0,r0,#1 00533e 0400 LSLS r0,r0,#16 005340 0c00 LSRS r0,r0,#16 005342 498a LDR r1,|L1.21868| 005344 8008 STRH r0,[r1,#0] 005346 d1f7 BNE |L1.21304| ;;;5633 Get_Comm_Bit01();//Port Input 005348 f7fffffe BL Get_Comm_Bit01 ;;;5634 usDelay(rrD_100us);//100us 00534c f44f7009 MOV r0,#0x224 005350 4986 LDR r1,|L1.21868| 005352 8008 STRH r0,[r1,#0] 005354 bf00 NOP |L1.21334| 005356 4885 LDR r0,|L1.21868| 005358 8800 LDRH r0,[r0,#0] ; uRR0 00535a 1e40 SUBS r0,r0,#1 00535c 0400 LSLS r0,r0,#16 00535e 0c00 LSRS r0,r0,#16 005360 4982 LDR r1,|L1.21868| 005362 8008 STRH r0,[r1,#0] 005364 d1f7 BNE |L1.21334| ;;;5635 Get_Comm_Bit00();//Port Input 005366 f7fffffe BL Get_Comm_Bit00 ;;;5636 usDelay(rrD_100us);//100us 00536a f44f7009 MOV r0,#0x224 00536e 497f LDR r1,|L1.21868| 005370 8008 STRH r0,[r1,#0] 005372 bf00 NOP |L1.21364| 005374 487d LDR r0,|L1.21868| 005376 8800 LDRH r0,[r0,#0] ; uRR0 005378 1e40 SUBS r0,r0,#1 00537a 0400 LSLS r0,r0,#16 00537c 0c00 LSRS r0,r0,#16 00537e 497b LDR r1,|L1.21868| 005380 8008 STRH r0,[r1,#0] 005382 d1f7 BNE |L1.21364| ;;;5637 ;;;5638 PortC1_PUSHPull();//Port Output Control 005384 f7fffffe BL PortC1_PUSHPull ;;;5639 Put_Comm_High();//Port OnOff 005388 f7fffffe BL Put_Comm_High ;;;5640 ;;;5641 } 00538c bd10 POP {r4,pc} ;;;5642 ENDP
Delay function does not work properly because of DCD.
I measured 100 us through the port with an oscilloscope. By the way. Because of DCD, 100us is not implemented properly.
Also, whenever I change the code little by little, DCD runs around.
How to avoid DCD?