DSP Effects Rack Application

[digitaldanny]

Describe the solution you'd like

• Leverage my PitcherThis project for the DSP final project. This project includes frequency-domain LPF and bin pitch shifting.
• Need to implement some extra logic for a frequency-domain HPF, effects enable/disable, (optionally) effects lock/unlock, and (optionally) time-domain echo.
• HC-05 code to read in the glove's data. Use this data to control the effects parameters.
• Reduce the FFT/IFFT clipping from the DSP demo. This StackExchange thread has a good comment for ways to reduce the clipping/low quality pitch shifting I was seeing in my DSP demo. Alternatively, I could just add a hardware LPF to reduce the noise at the output?

[digitaldanny]

Hardware being leveraged from DSP course.

Initial SW plan. Should be able to eliminate the need for dual-core with 6DOF calculation on glove-side.

[digitaldanny]

Need to implement a non-blocking read so the DSP algorithms can run while waiting for new controller data.

[digitaldanny]

Needed to do some project configurations to get the PitcherThis project back up and running.

Project > Properties > Build > C2000 Compiler

• Advanced Options > Language Options
  • C Dialect - "Compile program in C99 (--c99)"
• Include Options

C:\Users\Daniel\workspace_v10\SeniorDesign_DspEffectsRack_v2\device\driverlib C:\ti\c2000\C2000Ware_3_03_00_00\device_support\f2837xd\common\include C:\ti\c2000\C2000Ware_3_03_00_00\device_support\f2837xd\headers\include C:\Users\Daniel\Desktop\SW_Projects\GestureControl\demo C:\ti\c2000\C2000Ware_3_03_00_00\device_support\f2837xd\common\source C:\ti\c2000\C2000Ware_3_03_00_00\device_support\f2837xd\headers\source C:\Users\Daniel\Desktop\SW_Projects\GestureControl\demo\inc C:\Users\Daniel\Desktop\SW_Projects\GestureControl\demo\src C:\ti\c2000\C2000Ware_3_03_00_00\libraries\dsp\FPU\c28\include ${CG_TOOL_ROOT}/include ${INSTALLROOT_F2837XD}/headers/include ${INSTALLROOT_F2837XD}/common/include ${PROJECT_LOC}/../../Desktop/SW_Projects/GestureControl/demo ${PROJECT_LOC}/../../Desktop/SW_Projects/GestureControl/device

Project > Properties > Build > C2000 Linker > File Search Path

• Include library file or command file as input

rts2800_fpu32.lib libc.a F2837xD_Headers_nonBIOS_cpu1.cmd DspEffectsRack_2837xD_RAM_lnk_cpu1.cmd

• Add to library searchh path

C:\Users\Daniel\Desktop\SW_Projects\GestureControl\demo ${CG_TOOL_ROOT}/lib ${CG_TOOL_ROOT}/include ${INSTALLROOT_F2837XD}/headers/cmd

Copy and link these files into the project:

"C:\ti\c2000\C2000Ware_3_03_00_00\device_support\f2837xd\common\source\F2837xD_Dma.c" "C:\ti\c2000\C2000Ware_3_03_00_00\driverlib\f2837xd\driverlib\ccs\Debug\driverlib.lib" "C:\ti\c2000\C2000Ware_3_03_00_00\libraries\dsp\FPU\c28\lib\c28x_fpu_dsp_library.lib"

Project > Properties > Build > C2000 Linker > Basic Options

• Heap size for C/C++ dynamic memory allocation = 0x4000

[digitaldanny]

I have the DSP Effects Rack program running, but I am getting weird skipping issues. Portions of the clip are sometimes playing multiple times and the output is very noisy. I believe this might be an issue with the DMA triggering before the processing is complete.

[digitaldanny]

Glove controls to effects rack:

Glove Sensor	DSP Effect
Thumb	Toggle music on/off
Pointer	Toggle effects on/off
Middle	High-pass filter cutoff frequency
Pitch	Pitch
Roll	Low-pass filter cutoff frequency