Detect audio from microphone on the PropBOE
JasonFoglia
Posts: 5
How do I detect audio from microphone on the PropBOE?
C/C++ examples referred or spin is ok.
C/C++ examples referred or spin is ok.
Comments
Meaning the presence of "audio" past some threshold, or some particular frequency, what have you in mind?
Is there examples of how to use the microphone on the PropBOE?
I guess an example would be receiving frequencies from the mic, or maybe I guess recording sound to an SD card or maybe something simpler like sending the sound from the mic to speakers.
I've already worked on working examples for using the output audio jack and a speaker, but I've searched high and low for a simple microphone example.
Thanks for any help!
http://forums.parallax.com/showthread.php/105292
It records via microphone and then plays back via audio output.
If you change the pin #s to match BOE, it should work...
' modified 9/15/14 Dave Ratcliff from the Propeller tool to use with PropellerBOE ' The microphone is digitized and the samples are played on the headphones. CON _clkmode = xtal1 + pll16x _xinfreq = 5_000_000 ' At 80MHz the ADC/DAC sample resolutions and rates are as follows: ' ' sample sample ' bits rate ' ---------------- ' 5 2.5 MHz ' 6 1.25 MHz ' 7 625 KHz ' 8 313 KHz ' 9 156 KHz ' 10 78 KHz ' 11 39 KHz ' 12 19.5 KHz ' 13 9.77 KHz ' 14 4.88 KHz bits = 11 'try different values from table here PUB go cognew(@asm_entry, 0) 'launch assembly program into a COG DAT ' ' ' Assembly program ' org asm_entry mov dira,asm_dira 'make pins 8 (ADC) and 0 (DAC) outputs movs ctra,#20 'POS W/FEEDBACK mode for CTRA movd ctra,#21 movi ctra,#%01001_000 mov frqa,#1 movs ctrb,#26 'DUTY DIFFERENTIAL mode for CTRB movd ctrb,#27 movi ctrb,#%00111_000 mov asm_cnt,cnt 'prepare for WAITCNT loop add asm_cnt,asm_cycles :loop waitcnt asm_cnt,asm_cycles 'wait for next CNT value (timing is determinant after WAITCNT) mov asm_sample,phsa 'capture PHSA and get difference sub asm_sample,asm_old add asm_old,asm_sample shl asm_sample,#32-bits 'justify sample and output to FRQB mov frqb,asm_sample jmp #:loop 'wait for next sample period ' ' ' Data ' asm_cycles long |< bits - 1 'sample time asm_dira long $c200000 'output mask asm_cnt res 1 asm_old res 1 asm_sample res 1 {{ ┌──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┐ │ TERMS OF USE: MIT License │ ├──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┤ │Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation │ │files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, │ │modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software│ │is furnished to do so, subject to the following conditions: │ │ │ │The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.│ │ │ │THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE │ │WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR │ │COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, │ │ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. │ └──────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────┘cI had thought, I tried this code before. I'm might have gotten the pins mixed up.
It's working now with your help of course!