Am planning to use SPI0 and SPI1 on T3.6. I see SPI0 has several *dedicated* CS pins available (e.g. pins 9, 10, 15). For SPI1, I only see a single dedicated CS = pin 31, with no alternatives listed on the pinouts posted on PJRC or elsewhere. Two questions:
1. Am I missing something...are there no dedicated alternative/additional CS1 pins available? (SPI0 and SPI2 also has multiple dedicated CS pins...is SPI1 different?)
2. I read in documentation that pretty much any digital line with serve well as SPI CS line provided the slave device's library isn't optimized to use a dedicated hardware pin. This is my case. So maybe I just pick another digital output to serve as the second CS?
Reason I ask: I am actually connecting 2x of the same device (bioamplifier) to the same SPI port. Right now I have 2 amps connected to SPI0---amp#1 and #2 share a common MISO0, MOS0I, SCK0, but have different CS lines. Amp#1 CS line connects to T.36 pin 9 and amp#2 CS to pin 10. I'm now planning to add 2 more amplifiers (double the channel count) on using either SPI1 or SPI2. Just trying to find the metaphorical path of least resistance.
Thanks in advance for any info/insight you can share!
1. Am I missing something...are there no dedicated alternative/additional CS1 pins available? (SPI0 and SPI2 also has multiple dedicated CS pins...is SPI1 different?)
2. I read in documentation that pretty much any digital line with serve well as SPI CS line provided the slave device's library isn't optimized to use a dedicated hardware pin. This is my case. So maybe I just pick another digital output to serve as the second CS?
Reason I ask: I am actually connecting 2x of the same device (bioamplifier) to the same SPI port. Right now I have 2 amps connected to SPI0---amp#1 and #2 share a common MISO0, MOS0I, SCK0, but have different CS lines. Amp#1 CS line connects to T.36 pin 9 and amp#2 CS to pin 10. I'm now planning to add 2 more amplifiers (double the channel count) on using either SPI1 or SPI2. Just trying to find the metaphorical path of least resistance.
Thanks in advance for any info/insight you can share!