can i read 2 input analog in DE0 nano without switch selector???

i read the manual book that explain DE0 nano have IC ADC to read analog data but it's just can access 1 pin in one time using a switch selector, then i read the program demo on deo nano sample itls using pin from switch selector can i read without switch selector (in program below)???. i try to change with biner value but nothing effect it's just read input with pin selector switch that selected, did someone experience read the analog in DE0 Nano like this can you help me ???



Program ADC_control demo

module ADC_CTRL (
iRST,
iCLK,
iCLK_n,
iGO,
iCH,
oLED,

oDIN,
oCS_n,
oSCLK,
iDOUT
);

input iRST;
input iCLK;
input iCLK_n;
input iGO;
input [2:0] iCH;
output [7:0] oLED;

output oDIN;
output oCS_n;
output oSCLK;
input iDOUT;

reg data;
reg go_en;
wire [2:0] ch_sel;
reg sclk;
reg [3:0] cont;
reg [3:0] m_cont;
reg [11:0] adc_data;
reg [11:0] nilaiadc;
reg [7:0] led;

assign oCS_n = ~go_en;
assign oSCLK = (go_en)? iCLK:1;
assign oDIN = data;
assign ch_sel = iCH;
assign oLED = led;

always@(posedge iGO or negedge iRST)
begin
if(!iRST)
go_en <= 0;
else
begin
if(iGO)
go_en <= 1;
end
end

always@(posedge iCLK or negedge go_en)
begin
if(!go_en)
cont <= 0;
else
begin
if(iCLK)
cont <= cont + 1;
end
end

always@(posedge iCLK_n)
begin
if(iCLK_n)
m_cont <= cont;
end

always@(posedge iCLK_n or negedge go_en)
begin
if(!go_en)
data <= 0;
else
begin
if(iCLK_n)
begin
if (cont == 2)

data <= iCH[2]; //selektor switch

else if (cont == 3)

data <= iCH[1]; //selektor switch

else if (cont == 4)

data <= iCH[0];//selektor switch

else
data <= 0;
end
end
end

always@(posedge iCLK or negedge go_en)
begin
if(!go_en)
begin
adc_data <= 0;
led <= 8'h00;
end
else
begin
if(iCLK)
begin
if (m_cont == 4)
adc_data[11] <= iDOUT;
else if (m_cont == 5)
adc_data[10] <= iDOUT;
else if (m_cont == 6)
adc_data[9] <= iDOUT;
else if (m_cont == 7)
adc_data[8] <= iDOUT;
else if (m_cont == 8)
adc_data[7] <= iDOUT;
else if (m_cont == 9)
adc_data[6] <= iDOUT;
else if (m_cont == 10)
adc_data[5] <= iDOUT;
else if (m_cont == 11)
adc_data[4] <= iDOUT;
else if (m_cont == 12)
adc_data[3] <= iDOUT;
else if (m_cont == 13)
adc_data[2] <= iDOUT;
else if (m_cont == 14)
adc_data[1] <= iDOUT;
else if (m_cont == 15)
adc_data[0] <= iDOUT;
else if (m_cont == 1)
nilaiadc <= adc_data[11:4];
end

end

endmodule