Tool/software:
Hi TI Team,
We are developing a device with DAC8562Q1 in our design and we are in need of Linux device driver for it. Please send us the Linux device driver if it's available. Please find the kernel and OS version details below.
OS Version : Android 12
Kernel Version : v4.19
Regards,
Ranjith Kumar
Hi Ranjith,
We do not have a linux driver. This device uses a standard 24-bit SPI frame with a 8-bit command byte and 16-bit DAC data. There are likely linux example to help you get started with getting SPI up and running.
The 8-bit command structure is as shown (rally 6-bits as the first two bits are don't care):
Best,
Katlynne Jones
Hi Ranjith,
I do not have these examples. You'd need to configure your existing SPI code to shift new data on the rising edge and then send out SPI data based on the commands you want to send to the DAC (as shown in table 17 in the datahseet).
Depending on the SPI driver you have, there might be a fully integrated write function where you just need to call the function with the full data you are sending, or let's say "semi-integrated" where you call individual tx or rx commands to send and receive bytes.
If the driver you have is the latter, your sequence would look something like:
Set /SYNC low
tx = byte 3 (command)
tx = byte 2 (DB 15-8)
tx = byte 1 (DB 7-0)
Set /SYNC high.
An example to set an immediate output to DAC-A to mid-scale would be:
Set /SYNC low
tx = 0x18
tx = 0x80
tx = 0x00
Set /SYNC high.
Best,
Katlynne Jones
