Search found 3 matches

by Frederir
Mon Dec 04, 2017 9:08 pm
Forum: Showcase
Topic: Audio board with ESP32, Wired Ethernet and Amplifier
Replies: 1
Views: 7085

Audio board with ESP32, Wired Ethernet and Amplifier

I'm designing a board with ESP and VS1053 to be used as an internet radio. The main differences with other boards is the wired Ethernet connection, on board Class D amplifier and FM receiver. There is a project log on Hackaday : https://hackaday.io/project/28422-karadio-wired and the Altium design f...
by Frederir
Sat Oct 07, 2017 7:52 pm
Forum: Showcase
Topic: [info] World’s first ESP32 industrial computer has extensive wireless options
Replies: 5
Views: 12193

Re: [info] World’s first ESP32 industrial computer has extensive wireless options

I think they use an ethernet switch with one RMII interface and two 100BT interface such as KSZ8463RL: http://ww1.microchip.com/downloads/en/DeviceDoc/KSZ8463ML_RL_FML_FRL_ds_1.0.pdf You have only one interface, but you can daisy chain the controllers which ease the cabling and even if one node is t...
by Frederir
Mon Dec 12, 2016 8:44 am
Forum: General Discussion
Topic: High speed GPIO operations
Replies: 12
Views: 39077

Re: Confirmations about ESP32 peripherals

I wrote above, the BLINK_GPIO output frequency only 3Mhz,If the clock is 240 Mhz,I/O output frequency why so low?
May be because the C function gpio_set_level get translated in multiple assembly instructions by the C compiler ?


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