Multiplexer connection.

marcel-licence / esp32_basic_synth

ESP32 based simple synthesizer project

GNU General Public License v3.0

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Multiplexer connection. #18

Closed Opekusha closed 3 years ago

Opekusha commented 3 years ago

Please tell me which Pin of ESP32 the output from the multiplexer is connected to.

marcel-licence commented 3 years ago

#define ADC_MUL_S0_PIN  23 // pin 23 for S0 
#if ADC_INPUTS > 2
#define ADC_MUL_S1_PIN  18 // pin 18 for S1 
#endif
#if ADC_INPUTS > 4
#define ADC_MUL_S2_PIN  14 // pin 14 for S2
#endif
#if ADC_INPUTS > 8
#define ADC_MUL_S3_PIN  5    /* this has not been tested */
#endif

adcAttachPin(12); // pin 12 is used for ADC input

S3 goes to ground so you can use C0..C7 of the multiplexer. EN should be also connected to ground. SIG to pin 12 of the Audio Kit V2.2

Hope this helps

Opekusha commented 3 years ago

I am using the first option with a PCM external DAC. I do not have an audio KIT. You need a pin for the ESP32 G *. The rest of the pins are understandable, but thanks anyway for your attention.

marcel-licence commented 3 years ago

I've bring back the possibility to compile for the ESP32 DOIT DEVKIT. I think that will help. I've updated the readme. Please tell me if something missing

tiretrak commented 3 years ago

marcel-licence commented 3 years ago

Thanks for the picture, it's looking great!