#Xmos xscope serial#
#Xmos xscope code#
#Xmos xscope Pc#

So one could make a simple attachment board for this XMOS board that streams 24-bit 48 kHz audio from a ADC using this arrangement:ĪDC Board -(I2S)-> XMOS Board -(JTAG BUS)-> XTAG JTAG Adapter -(USB)-> PC My laptop is pretty slow (1.2 GHz Core2 Duo) but I was able to get 2.4 Mbits/sec. I tested the throughput of this board and the XTAG2 for data sent to the computer from an XMOS program via 'printf' functions. XMOS Board -(printf)-> XTAG JTAG Adapter -(USB)-> PC Using the XTAG2 JTAG adapter an XMOS program can send data to the PC using functions like 'printf'. The board still has connections for the FLASH (D00, D01, D10, D11) therefore attached boards can include the FLASH memory. I swapped out the TPS62237 and TPS62239 switching regulators (1.0V and 3.3V) for a FAN5358 1.0V switcher and a 3.3V linear for easier assembly. Got the board running after a few changes. Also, I wasn't sure if I sure include the CODEC or not. That's be 200 DSP-1K MIPs (approximately 1200 CPU MIPS ). I could design it to support four DSP's but that's probably overkill. Either way I'll post the GERBER's in the near future for each so people can make their own if they want to.Ĭurrently the DSP board has two A元102 DSP's and one AK4556 Audio Codec.

I'd probably sell the main board for $30 - $40. The 'main' board has been layed out - I'll receive sample boards to test this week. So 50 DSP-1K MIPS is comparable to 300 CPU MIPs. So doing a single tap for an FIR for the DSP-1K takes one instruction (and one instruction cycle!) while the same function on a conventional CPU (like the XMOS core) takes up to six (load coefficient, load sample, multiply/accumulate, shift accumulator right to maintain decimal point, increment coefficient pointer, increment sample pointer). The Wavefront part handles the fixed fractional math details, performs automatic memory addressing for FIFO's, and also has functions for log/antilog - and it does these at 50 MIP's. I was going to use the XMOS for DSP but it's more work to make a DSP program for that platform than it is for the Wavefront DSP. The XMOS JTAG (called XTAG) is only $20 from Digikey!!

#Xmos xscope code#

This allows one to add code (using XMOS's development environment) and hardware (by adding boards with the 28-pin connectors) to increase system function. The DSP-1K object code is then burned into FLASH using an XMOS command-line tool that's used for uploading XMOS programs and data.ħ) I'd supply the XMOS code (and compiled program image) for booting the DSP and loading the DSP programs but since the 'main' board has the XTAG connection anyone could modify the program to add more functionality.

#Xmos xscope serial#

This board could use the remaining 'main' board I/Os for the rotary encoders, low-speed ADC control, led displays, serial interface to lcd/oled displays, or whatever.Ħ) To create DSP programs you would use either the Wavefront assembler or Python scripts (see this forum's postings 'Simple DSP' and 'Next DSP Effects Board') for explanations of how Python is used). Each DSP is boot-loaded via the 'main' board (the DSP programs are stored in the FLASH on the 'main' board).Ĥ) While running (processing audio) the 'main' board continuously updates each of the DSP's with parameter data (from external pots connected to low-speed ADC's, or from a table of parameters accessed via rotary encoders, etc).ĥ) A third board could reside in-between the 'main' board and the 'dsp' board using the same method of connecting the boards together (28-pin angled male/female header/socket pairs). It has a the XTAG connector that you connect to an XMOS JTAG emulator called an XTAG-2 that allows you to load and debug XMOS programs, burn programs and data to FLASH, and to receive debug information in real-time (see 'XSCOPE').ģ) The 'dsp' board connects to 'main' board and has multiple Wavefront A元102 DSP's (the DSP core is called the DSP-1K). Here's how it works:ġ) The 'main' board contains the XMOS XS1-L1, FLASH memory, crystal oscillator, switching voltage regulators, and passives to create a single board for developing XMOS programs. It uses the XMOS XS1-L1 for the peripheral processor and program loader, and a number of A元102 Wavefront DSP's for audio processing.