Help with two spi devices

[vxcheese]

Hey guys,

I'm trying to make a portable Raspberry Pi. I have a TFT screen (tinylcd 3.5 one), and it uses SPI. I also have two analog joysticks I want to hook up, and I have a MCP3008. The MCP3008 requires use of SPI as well. Can someone give me a wiring diagram or something as to how I would go about connecting the two devices successfully?
Cheers!

EDIT: On a Raspberry Pi 2.

[ghp]

Hello,
when I look into the description of this Display/ Touch-Controller, I see that both SPI-chip-selects are used by this hardware.

You could try to emulate the SPI hardware by simple GPIO handling. But the perhaps best way would be to look for an I2C-connected ADC. There are breakouts available for e.g ads1015.

If you have a 3.3V arduino around, then write a small sketch and send the adc values by serial line to the RPi. If price is a constraint,
use a bare atmel328-controller, but this needs some programming skills.

Regards,
Gerhard

[vxcheese]

I am using the standard 3.5" display. Not the touch version so it's probably using one port. Also, is there an i2c chip as easy to use as the MCP3008?

[mikronauts]

The problem is that the display will use up all (or close to all) SPI bandwidth.

If all you are wanting read is joysticks, just add a PCF8591 I2C 4 channel ADC.