Hardware SPI

shredder · Joined: 28 Jun 2004 Posts: 3 Location: Auckland New Zealand

Hi
Im using ver 1.11.73 and a 8535 chip.
Have been interfacing to the WTS701 text to speech chip the code works
fine for software spi but if I change to spi = hard, nothing. Have got it
selected in the compile options.

Thanks Mike

albertsm · Joined: 09 Apr 2004 Posts: 5319 Location: Holland

You need to use SPIINIT, and of course you need to select the right SPI mode.

shredder · Joined: 28 Jun 2004 Posts: 3 Location: Auckland New Zealand

Thanks Mark for the reply,
Have tried, but no luck yet. Below is a cutting of what I have done, the SPI soft works fine. Will look at it on a scope when I return to work in a week.

$regfile = "8535def.dat"
Config Spi = Soft , Din = Pinb.6 , Dout = Portb.5 , Ss = Portb.4 , Clock = Portb.7
'Config Spi = Hard , Interrupt = Off , Clockrate = 128 , Data Order = Msb , Master = Yes , Polarity = High , Phase = 1 , Noss = 1
Spiinit

Dim Spicmd(2) As Byte
Dim Spistring As String * 50

Ttspowerup:
Spicmd(1) = &H14 'select clock
Spicmd(2) = &H00 '00 = 24mhz
Spiout Spicmd(1) , 2
Waitms 100
Spicmd(1) = &H02 'powerup
Spicmd(2) = &H00
Spiout Spicmd(1) , 2
Waitms 100
'setvol 07 default = -28db 00 = 0db
Spicmd(1) = &H51
Spicmd(2) = &H00
Spiout Spicmd(1) , 2
Waitms 100
'conversion speed default h52 02 0-4 0 = slowest
Spicmd(1) = &H52
Spicmd(2) = &H00
Spiout Spicmd(1) , 2

albertsm · Joined: 09 Apr 2004 Posts: 5319 Location: Holland

When you use NOSS option, you must make a CS/SS pin low/hight yourself.