Compiling MATLAB into an FPGA
Example of disp Function
The following MCode function shows how to use the disp function to print variable values.
function x = testdisp(a, b) persistent dly, dly = xl_state(zeros(1, 8), a); persistent rom, rom = xl_state([3, 2, 1, 0], a); disp('Hello World!'); disp(['num2str(dly) is ', num2str(dly)]); disp('disp(dly) is '); disp(dly); disp('disp(rom) is '); disp(rom); a2 = dly.back; dly.push_front_pop_back(a); x = a + b; disp(['a = ', num2str(a), ', ', ...
'b = ', num2str(b), ', ', ...
'x = ', num2str(x)]); disp(num2str(true)); disp('disp(10) is'); disp(10); disp('disp(-10) is'); disp(-10); disp('disp(a) is '); disp(a); disp('disp(a == b)'); disp(a==b);
The Enable print with disp option must be checked.
System Generator for DSP User Guide
UG640 (v11.4) December 2, 2009 www.xilinx.com
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Chapter 1: Hardware Design Using System Generator
Here are the lines that are displayed on the MATLAB console for the first simulation step.
mcode_block_disp/MCode (Simulink time: 0.000000, FPGA clock: 0)
Hello World!
num2str(dly) is [0.000000, 0.000000, 0.000000, 0.000000, 0.000000,
0.000000, 0.000000, 0.000000] disp(dly) is type: Fix_11_7, maxlen: 8, length: 8,
0: binary 0000.0000000, double 0.000000,
1: binary 0000.0000000, double 0.000000,
2: binary 0000.0000000, double 0.000000,
3: binary 0000.0000000, double 0.000000,
4: binary 0000.0000000, double 0.000000,
5: binary 0000.0000000, double 0.000000,
6: binary 0000.0000000, double 0.000000,
7: binary 0000.0000000, double 0.000000, disp(rom) is type: Fix_11_7, maxlen: 4, length: 4,
0: binary 0011.0000000, double 3.0,
1: binary 0010.0000000, double 2.0,
2: binary 0001.0000000, double 1.0,
3: binary 0000.0000000, double 0.0, a = 0.000000, b = 0.000000, x = 0.000000
1 disp(10) is type: UFix_4_0, binary: 1010, double: 10.0
disp(-10) is type: Fix_5_0, binary: 10110, double: -10.0
disp(a) is type: Fix_11_7, binary: 0000.0000000, double: 0.000000
disp(a == b) type: Bool, binary: 1, double: 1
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System Generator for DSP User Guide
UG640 (v11.4) December 2, 2009
