Freescale 9S12 系列单片机应用笔记（SCI）1

1. I0CR2_RE=(isEnable&0x01);
2. }
3. elseif(port==SCI1)
4. {
5. SCI1CR2_RE=(isEnable&0x01);
6. }
7. else
8. {
9. //Ifcoderunhere,somethingmustgowrong.Donothinghere!
10. }
11. }

使能SCI模块的发送功能

1. /**
2. *Enable/DisableSCITransmitter
3. *@paramportportcanbeSCI0/SCI1
4. *@paramisEnable0disable1enable
5. */
6. voidSCIEnableTrans(unsignedcharport,unsignedcharisEnable)
7. {
8. if(port==SCI0)
9. {
10. SCI0CR2_TE=(isEnable&0x01);
11. }
12. elseif(port==SCI1)
13. {
14. SCI1CR2_TE=(isEnable&0x01);
15. }
16. else
17. {
18. //Ifcoderunhere,somethingmustgowrong.Donothinghere!
19. }
20. }

发送数据

1. /**
2. *SendacharthrounghSCImodule.
3. *@paramportportcanbeSCI0/SCI1
4. *@paramsthedatatobesent
5. */
6. voidSCIPutChar(unsignedcharport,unsignedchars)
7. {
8. if(port==SCI0)
9. {
10. while(SCI0SR1_TDRE==0);//SCI0SR1_TC是发送完成
11. SCI0DRL=s;
12. }
13. else
14. {
15. while(SCI1SR1_TDRE==0);//SCI1SR1_TC
16. SCI1DRL=s;
17. }
18. }
20. /**
21. *SendacharstringthrounghSCImodule.
22. *@paramportportcanbeSCI0/SCI1
23. *@param*strthestringtobesent
24. */
25. voidSCIPutStr(unsignedcharport,unsignedchar*str)
26. {
27. while(0!=*str)
28. {
29. SCIPutChar(port,*str);
30. str++;
31. }
32. }
34. /**
35. *SenddatathrounghSCImodule.
36. *@paramportportcanbeSCI0/SCI1
37. *@param*ppointertothedatatobesent
38. *@paramsizethesize(byte)ofthedata
39. */
40. voidSCIWrite(unsignedcharport,void*p,intsize)
41. {
42. unsignedchar*str=(unsignedchar*)p;
43. while(size>0)
44. {
45. SCIPutChar(port,*str);
46. str++;
47. size--;
48. }
49. }
51. /**
52. *Sendashortintvalue(BigEndian)throunghSCImodule.
53. *@paramportportcanbeSCI0/SCI1
54. *@paramithedatatobesent
55. */
56. voidSCIPutShortBigEndian(unsignedcharport,shorti)
57. {
58. char*p=(char*)&i;
59. SCIPutChar(port,p[0]);
60. SCIPutChar(port,p[1]);
61. }
63. /**
64. *Sendashortintvalue(LittleEndian)throunghSCImodule.
65. *@paramportportcanbeSCI0/SCI1
66. *@paramithedatatobesent
67. */
68. voidSCIPutShortLittleEndian(unsignedcharport,shorti)
69. {
70. char*p=(char*)&i;
71. SCIPutChar(port,p[1]);
72. SCIPutChar(port,p[0]);
73. }
75. /**
76. *Sendalongintvalue(BigEndian)throunghSCImodule.
77. *@paramportportcanbeSCI0/SCI1
78. *@paramithedatatobesent
79. */
80. voidSCIPutLongBigEndian(unsignedcharport,longi)
81. {
82. char*p=(char*)&i;
83. SCIPutChar(port,p[0]);
84. SCIPutChar(port,p[1]);
85. SCIPutChar(port,p[2]);
86. SCIPutChar(port,p[3]);
87. }
89. /**
90. *Sendalongintvalue(LittleEndian)throunghSCImodule.
91. *@paramportportcanbeSCI0/SCI1
92. *@paramithedatatobesent
93. */
94. voidSCIPutLongLittleEndian(unsignedcharport,longi)
95. {
96. char*p=(char*)&i;
97. SCIPutChar(port,p[3]);
98. SCIPutChar(port,p[2]);
99. SCIPutChar(port,p[1]);
100. SCIPutChar(port,p[0]);
101. }

接收数据

1. /**
2. *ReceiveachardatafromSCImodule,noreply.
3. *@paramportportcanbeSCI0/SCI1
4. *@returnthereceivedchar
5. */
6. unsignedcharSCIGetChar(unsignedcharport)
7. {
8. if(port==SCI0)
9. {
10. while(SCI0SR1_RDRF==0);
11. returnSCI0DRL;
12. }
13. else
14. {
15. while(SCI1SR1_RDRF==0);
16. returnSCI1DRL;
17. }
18. }

相应的头文件

1. /**
2. *\filesci.h
3. *\authorLiYuan
4. *platform:mc9s12dp256B
5. *date:2012-4-16
6. *version:1.0.0
7. *description:SCI(SerialCommunicationInterface)SupportCode
8. */
10. #ifndef_SCI_H_
11. #define_SCI_H_
14. #defineSCI00
15. #defineSCI11
17. #defineIDLE_LINE0
18. #defineADDRESS_MARK1
20. #defineNORMAL_MODE0
21. #defineLOOP_MODE1
22. #defineSING_WIRE_MODE2
24. #defineRUN_MODE0
25. #defineWAIT_MODE1
27. /*FunctionDeclaration*/
29. /**
30. *SettheBaudRateoftheSCI.
31. *@paramport,portcanbeSCI0/SCI1
32. *@parambaudRate,thewantedbaudrate.
33. *@parambusClk,TheSCImoduleclock.
34. */
35. voidSCISetBaudRate(unsignedcharport,unsignedlongbaudRate,unsignedlongbusClk);
37. /**
38. *SettheInterruptEnableBit
39. *@paramportportcanbeSCI0/SCI1
40. *@paramtieTransmitterInterruptEnableBIt
41. *@paramtcieTransmissionCompleteInterruptEnableBIt
42. *@paramrieReceiverFullInterruptEnableBIt
43. *@paramilieIdleLineInterruptEnableBIt
44. *0InterruptrequestsDisabled
45. *1InterruptrequestsEnabled
46. */
47. voidSCISetIEBit(unsignedcharport,unsignedchartie,unsignedchartcie,unsignedcharrie,unsignedcharilie);
49. /**
50. *EnableTheTxinterrupt(TransmitterInterruptEnableBIt)
51. *@paramport,portcanbeSCI0/SCI1
52. */
53. voidSCIEnableTxInt(unsignedcharport);
55. /**
56. *DisableTheTxinterrupt(TransmitterInterruptEnableBIt)
57. *@paramport,portcanbeSCI0/SCI1
58. */
59. voidSCIDisTxInt(unsignedcharport);
61. /**
62. *Enable/DisableSCIReceiver
63. *@paramportportcanbeSCI0/S