The LPC1114 is an 32 bit ARM M0 processor with 48Mhz. This chip is available in a 28 DIP package which is a big advantage for hobbyists.
Here is the code for a sin wave generator with an LPC1114. I used an LPC1114Xpresso board ( it is quite cheap ).
Be aware that the code is not running with the LPC1114FN28 Dip package because the pin used is not connected. For the LPC1114FN28 see the code further down in this thread.
features:
audio output: 10bit pwm
sampling rate: 48kHz
sin wave frequency: 440 Hz ( may be changed in code )
Here is a link to a pdf on how to interface a LPC1114 to a LPC1114Xpresso:
http://www.sase.com.ar/2012/files/2012/ ... -DIP28.pdf
LPC1114 Data Sheet: http://www.nxp.com/documents/data_sheet/LPC111X.pdf
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440 Hz sin wave generator with LPC1114
6 posts • Page 1 of 1
440 Hz sin wave generator with LPC1114
by chris on Sun Jan 13, 2013 7:19 pm
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dds_sinwave_LPC1114.c.zip- (2.49 KiB) Downloaded 1117 times
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- SinWave.png (4.7 KiB) Viewed 12258 times
Last edited by chris on Wed Jul 31, 2013 7:02 am, edited 4 times in total.
- chris
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bell sound
by chris on Wed Jan 16, 2013 8:01 pm
Creating bell sounds with a 5 channel DDS:
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- ArmGlocke.zip
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Last edited by chris on Sat Jan 26, 2013 6:26 pm, edited 1 time in total.
- chris
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PC simulation of LPC1114 sound
by chris on Sat Jan 26, 2013 6:25 pm
It is very usefull to develop the routines for sound generation on the PC. It is easier to debug and you can store the sound as file on the PC instead of recording it from the ARM.
The following program can be compiled either for running on the PC or the LPXpresso1114.
The following program can be compiled either for running on the PC or the LPXpresso1114.
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- ArmPcSound.zip
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envelope generator and playtune sequencer
by chris on Sun Feb 03, 2013 9:41 am
Newest version:
- envelope generator with attack, decay, sustain and release
- playtune sequencer
- envelope generator with attack, decay, sustain and release
- playtune sequencer
- Attachments
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- chArmSound_20130203.zip
- (35.82 KiB) Downloaded 1163 times
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Pin-Dip-Package now supported
by chris on Sun Feb 17, 2013 4:21 pm
New Version: LPC1114FN102 28-PIN-DIP package supported.
Output now at PWM-Pin P0.8
Additional features: different waveforms supported
Output now at PWM-Pin P0.8
Additional features: different waveforms supported
- Attachments
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- ArmLPC1114FN28_Synth.jpg (73.2 KiB) Viewed 11328 times
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- chArmPcSound_20130217.zip
- (23.9 KiB) Downloaded 1229 times
- chris
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