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Edzelf / ESP32-Radio

Internet radio based on ESP32, VS1053 and a TFT screen.
GNU General Public License v3.0
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ch376 wiring #396

Closed clear-sky closed 3 years ago

clear-sky commented 3 years ago

hi dear ed and thanks for your great work i have made this radio and now would like to add ch376 to my project i studied ch376 datasheet https://www.mpja.com/download/ch376ds1.pdf in page 26 cs pin is connected to vcc(3v3) in spi mode but in page 13 of your manual(https://github.com/Edzelf/ESP32-Radio/tree/master/doc/ESP32-radio.odt) dont see this connection are you sure that pin does not need vcc connection?

clear-sky commented 3 years ago

also see here https://github.com/djuseeq/Ch376msc cs pin is connected to 3v3 ch376s-u-disk-read-write-module-usb-flash-control-transfer-for-arduino-28220

Edzelf commented 3 years ago

The CH376 uses the SPI bus. But the CH376 is not the only one on this bus. The VS1053 and the SPI display use the bus as well. Now if you have just ONE device on the SPI bus, you can afford to tie the CS signal to +VCC. The device will always react on SPI activity. But if you have more than one devices on the SPI bus, you need to select the intended device before starting a SPI transfer. The CS (Chip Select) causes the device to be addressed. So for one device on the bus you need 3 I/O pins, for two devices 5 I/O pins, for three devices 6 I/O pins. .......

clear-sky commented 3 years ago

hi dear ed thanks for the time took for me it seems pin d3 of ch376 is named "SS"(slave select) is d3 chip select pin? or another pin named CS?! which of them must be used as cs pin? please see here (the last answer) https://github.com/djuseeq/Ch376msc/issues/1 thanks again

Edzelf commented 3 years ago

SS is just another name for CS.

clear-sky commented 3 years ago

this is my experience of ch376s module

WR > GND RD > GND CS > 3V3 (note that datasheet says this pin is spi cs pin page 3 pin 18 but djuseeq have used d3 as spi cs pin) D7 > pin_spi_miso D6 > pin_spi_mosi D5 > pin_spi_sck D3 > pin_ch376_cs INT > pin_ch376_int

remember to add this line to your config line

fs = USB

now ch376 works fine!

clear-sky commented 3 years ago

big thanks for ed for his great work