18F252 with RFM42B - hardware SPI

[madmax]

Hello.

Sorry for my bad English.

My problem:
I am trying to connect the CPU PIC18f252 with module RFM42B using hardware SPI. However, I have no response from the RF module.

1)
- I set the CPU clock 20MHz
- setup_spi (spi_master | spi_l_to_h | spi_clk_div_64)
- I set SDN at low level
- I set the SEL at low level
- spi_write (0x01)
- Result = spi_read ()
- I set a high-level SEL

I always get the result = 0

2)
- I set the CPU clock 20MHz
- setup_spi (spi_master | spi_h_tol | spi_clk_div_64)
- I set SDN at low level
- I set the SEL at low level
- Spi_write (0x01)
- Result = spi_read ()
- I set a high-level SEL

I always get the result = 0

When I set the level of SDN High - result = ff

Software SPI is working correctly - result always wynik = 06 is correct

Where I make mistake?

http://www.hoperf.com/upload/rf/RFM42B_43B.pdf
_________________
Piotr

[PCM programmer]

Here is the data sheet:
http://www.hoperf.com/upload/rf/RFM42B_43B.pdf

Look on page 3. It shows the SPI timing. It shows that SCLK idles at
a low level and samples the data on the rising edge. This is SPI Mode 0.
You should add the following #define statements above main() and edit
the setup_spi() statement so it uses Mode 0. Example:

[madmax]

Thank you for help. Communication works. I did not know spi_read does not generate the clock signal .
_________________
Piotr