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1.1 ��Ƭ�C(j��)��(ji��n)�� 1
1.1.1 ʲô�dž�Ƭ�C(j��)1
1.1.2 ��Ƭ�C(j��)��(y��ng)��ϵ�y(t��ng)�ĽM�ɼ���(sh��)���f��2
1.1.3 ��Ƭ�C(j��)�ķ��3
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1.2.1 �x���Ƭ�C(j��)����̖(h��o)5
1.2.2 �O(sh��)Ӌ(j��)��Ƭ�C(j��)�·ԭ��D5
1.2.3 ������Ƭ�C(j��)�·6
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�� 2 �� ������(sh��)���·����(sh��)���c C51 �Z�Ի��A(ch��)19
2.1 ������(sh��)���· 19
2.1.1 �c�T19
2.1.2 ���T20
2.1.3 ���T22
2.1.4 �c���T23
2.1.5 ����T24
2.2 ��(sh��)���c��(sh��)�Ƶ��D(zhu��n)�Q 26
2.2.1 ʮ�M(j��n)�Ɣ�(sh��)26
2.2.2 ���M(j��n)�Ɣ�(sh��)26
2.2.3 ʮ���M(j��n)�Ɣ�(sh��)27
2.2.4 ���M(j��n)�Ɣ�(sh��)�cʮ�M(j��n)�Ɣ�(sh��)���D(zhu��n)�Q28
2.2.5 ���M(j��n)�Ɣ�(sh��)�cʮ���M(j��n)�Ɣ�(sh��)���D(zhu��n)�Q28
2.2.6 ��Ƭ�C(j��)�Ĕ�(sh��)�ı�ʾ���\(y��n)��29
2.3 C51 �Z�Ի��A(ch��) 31
2.3.1 ����31
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2.3.4 �P(gu��n)�I��36
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2.3.6 ѭ�h(hu��n)�Z��38
2.3.7 �x���Z��40
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3.1 8051 ��Ƭ�C(j��)�����_�����c��(n��i)���Y(ji��)��(g��u) 42
3.1.1 ���_�����f��42
3.1.2 ��Ƭ�C(j��)�cƬ��惦(ch��)�����B���c����44
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3.2.1 P0 �˿�49
3.2.2 P1 �˿�50
3.2.3 P2 �˿�51
3.2.4 P3 �˿�52
3.3 8051 ��Ƭ�C(j��)�Ĵ惦(ch��)�� 53
3.3.1 �惦(ch��)���Ĵ惦(ch��)��λ�c��ַ53
3.3.2 Ƭ��(n��i)�������惦(ch��)����ʹ���c��ַ54
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3.3.5 ���⹦�ܼĴ�����SFR��58
�� 4 �� Keil C51 ����ܛ����ʹ��63
4.1 Keil C51 ܛ���İ��b 63
4.1.1 Keil C51 ܛ���İ汾���@ȡ63
4.1.2 Keil C51 ܛ���İ��b63
4.2 ����ľ����c���g 66
4.2.1 ����(d��ng) Keil C51 ܛ�����½������ļ�66
4.2.2 �½�Դ�����ļ����c�����P(gu��n)“(li��n)����69
4.2.3 ��������71
4.2.4 ���g����72
4.3 ����ķ����c�{(di��o)ԇ 76
4.3.1 ��������_����76
4.3.2 �����O(sh��)��77
4.3.3 ���g����78
4.3.4 �����{(di��o)ԇ����79
��5�� ��Ƭ�C(j��)�(q��)��(d��ng) LED ���·�����̌�(sh��)�� 83
5.1 LED ��(ji��n)�� 83
5.1.1 �����c��̖(h��o)83
5.1.2 ���|(zh��)83
5.1.3 �z�y(c��)84
5.1.4 ����������ֵӋ(j��)�� 84
5.2 ��Ƭ�C(j��)�c(di��n)���΂�(g��) LED ���·�������f�� 85
5.2.1 ��Ƭ�C(j��)�c(di��n)���΂�(g��) LED ���·85
5.2.2 ����λ������ʽ�����c(di��n)���΂�(g��) LED �ij����f��85
5.2.3 �����ֹ�(ji��)������ʽ�����c(di��n)���΂�(g��) LED �ij����f��87
5.2.4 �΂�(g��) LED �Թ̶��l���W�q�l(f��)��ij����f��88
5.2.5 �΂�(g��) LED �Բ�ͬ�l���W�q�l(f��)��ij����f��89
5.3 ��Ƭ�C(j��)�c(di��n)������(g��) LED ���·�������f�� 89
5.3.1 ��Ƭ�C(j��)�c(di��n)������(g��) LED ���·89
5.3.2 ����λ������ʽ�����c(di��n)������(g��) LED �ij����f��90
5.3.3 �����ֹ�(ji��)������ʽ�����c(di��n)������(g��) LED �ij����f��91
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5.3.5 ����(g��) LED ���ƺ����Ƶij����f��92
5.3.6 LED ѭ�h(hu��n)���ƺ����Ƶij����f��93
5.3.7 LED �Ƅ�(d��ng)���W�q�l(f��)��ij����f��95
5.3.8 �ò����ʽ���� LED ������ʽ�l(f��)��ij����f��96
5.3.9 LED ���Ӱl(f��)��ij����f��96
5.4 ���� PWM ��ʽ�{(di��o)��(ji��) LED ���ȵ�ԭ���������f�� 97
5.4.1 ���� PWM ��ʽ�{(di��o)��(ji��) LED ���ȵ�ԭ��97
5.4.2 ���� PWM ��ʽ�{(di��o)��(ji��) LED ���ȵij����f��98
��6�� ��Ƭ�C(j��)�(q��)��(d��ng) LED ��(sh��)�a�ܵ��·�����̌�(sh��)�� 100
6.1 ��Ƭ�C(j��)�(q��)��(d��ng)һλ LED ��(sh��)�a�ܵ��·�������f�� 100
6.1.1 һλ LED ��(sh��)�a�ܵ��������Y(ji��)��(g��u)�c�z�y(c��) 100
6.1.2 ��Ƭ�C(j��)�B��һλ LED ��(sh��)�a�ܵ��·102
6.1.3 �΂�(g��)��(sh��)�a���o�B(t��i)�@ʾһ��(g��)�ַ��ij����f��103
6.1.4 �΂�(g��)��(sh��)�a�܄�(d��ng)�B(t��i)�@ʾ����(g��)�ַ��ij����f��103
6.1.5 �΂�(g��)��(sh��)�a�ܭh(hu��n)���D(zhu��n)Ȧ�@ʾ�ij����f��104
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6.2 ��Ƭ�C(j��)�(q��)��(d��ng) 8 λ LED ��(sh��)�a�ܵ��·�������f�� 105
6.2.1 ��λ LED ��(sh��)�a���������Y(ji��)��(g��u)�c�z�y(c��)105
6.2.2 ��Ƭ�C(j��)�B�� 8 λ��ꎘO��(sh��)�a�ܵ��·107
6.2.3 8 λ��(sh��)�a���@ʾ 1 ��(g��)�ַ��ij����f��110
6.2.4 8 λ��(sh��)�a����λ�@ʾ 8 ��(g��)�ַ��ij����f��110
6.2.5 8 λ��(sh��)�a��ͬ�r(sh��)�@ʾ 8 ��(g��)�ַ��ij����f��111
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7.1.1 ʲô���Д�114
7.1.2 �Д�Ļ�������114
7.1.3 �Д��̎���^��114
7.2 8051 ��Ƭ�C(j��)���Д�ϵ�y(t��ng)�Y(ji��)��(g��u)�c���ƼĴ��� 115
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7.2.2 �Д�Դ�Ĵ���116
7.2.3 �Д����S�Ĵ��� IE118
7.2.4 �Д���(y��u)�ȼ�(j��)���ƼĴ��� IP118
7.3 �Дྎ�̌�(sh��)�� 119
7.3.1 �Дྎ�̵��·���D 119
7.3.2 ���ⲿ�Д� 0 �Ե��ƽ��ʽ�|�l(f��)�Д�ij����f��119
7.3.3 ���ⲿ�Д� 1 ���½��ط�ʽ�|�l(f��)�Д�ij����f��121
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