key_prog.fit.eqn

简单易懂的4*4键盘扫描及显示程序。对编写其他形式的键盘扫描程序有一定的指导意义.

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--C1_temp[3] is key_scan:inst2|temp[3] at LC_X1_Y5_N3
--operation mode is normal

C1_temp[3]_lut_out = C1_temp[2] & !C1_temp[0] & !C1_temp[1] & !C1_temp[3];
C1_temp[3] = DFFEAS(C1_temp[3]_lut_out, GLOBAL(clk), VCC, , , , , , );


--C1_temp[2] is key_scan:inst2|temp[2] at LC_X1_Y5_N6
--operation mode is normal

C1_temp[2]_lut_out = !C1_temp[2] & !C1_temp[0] & C1_temp[1] & !C1_temp[3];
C1_temp[2] = DFFEAS(C1_temp[2]_lut_out, GLOBAL(clk), VCC, , , , , , );


--C1_temp[1] is key_scan:inst2|temp[1] at LC_X1_Y5_N2
--operation mode is normal

C1_temp[1]_lut_out = !C1_temp[2] & C1_temp[0] & !C1_temp[1] & !C1_temp[3];
C1_temp[1] = DFFEAS(C1_temp[1]_lut_out, GLOBAL(clk), VCC, , , , , , );


--C1_temp[0] is key_scan:inst2|temp[0] at LC_X1_Y5_N5
--operation mode is normal

C1_temp[0]_lut_out = C1_temp[3] # C1_temp[2] & (C1_temp[0] # C1_temp[1]) # !C1_temp[2] & (C1_temp[0] $ !C1_temp[1]);
C1_temp[0] = DFFEAS(C1_temp[0]_lut_out, GLOBAL(clk), VCC, , , , , , );


--key_out[3] is key_out[3] at PIN_238
--operation mode is input

key_out[3] = INPUT();


--key_out[2] is key_out[2] at PIN_135
--operation mode is input

key_out[2] = INPUT();


--key_out[1] is key_out[1] at PIN_206
--operation mode is input

key_out[1] = INPUT();


--key_out[0] is key_out[0] at PIN_197
--operation mode is input

key_out[0] = INPUT();


--clk is clk at PIN_29
--operation mode is input

clk = INPUT();


--key_in[3] is key_in[3] at PIN_46
--operation mode is output

key_in[3] = OUTPUT(C1_temp[3]);


--key_in[2] is key_in[2] at PIN_50
--operation mode is output

key_in[2] = OUTPUT(C1_temp[2]);


--key_in[1] is key_in[1] at PIN_47
--operation mode is output

key_in[1] = OUTPUT(C1_temp[1]);


--key_in[0] is key_in[0] at PIN_45
--operation mode is output

key_in[0] = OUTPUT(C1_temp[0]);


--soeplay[6] is soeplay[6] at PIN_179
--operation mode is output

soeplay[6] = OUTPUT(GND);


--soeplay[5] is soeplay[5] at PIN_164
--operation mode is output

soeplay[5] = OUTPUT(VCC);


--soeplay[4] is soeplay[4] at PIN_122
--operation mode is output

soeplay[4] = OUTPUT(VCC);


--soeplay[3] is soeplay[3] at PIN_121
--operation mode is output

soeplay[3] = OUTPUT(VCC);


--soeplay[2] is soeplay[2] at PIN_105
--operation mode is output

soeplay[2] = OUTPUT(VCC);


--soeplay[1] is soeplay[1] at PIN_185
--operation mode is output

soeplay[1] = OUTPUT(VCC);


--soeplay[0] is soeplay[0] at PIN_132
--operation mode is output

soeplay[0] = OUTPUT(VCC);