Hi,


I will have to program a transceiver, it’s a SPIRIT1 from STMicroelectronics. I have to program it through an SPI interface with a MCU.

One problem is that I don’t know how to send the data from the MCU to the SPIRIT1.

I want to send data to the SYNT0 register, with « 6 band select factor for high band » so field BS = 1, and I want the SYNTH[4:0] field to be 00000, so the byte of the SYNTH0 register is 0000 0001.

If I’m using an ATmega32, PB5 is the MOSI pin. So I assume the code will be :

PB5 = 00000000000010110000000100000010 ; //Figure 14

Am I right ?

Another problem, I don’t understand the « Reset ». I assume that I have to write the reset bit code to the field to reset the fiel. So if I want to reset the BS field, I send 001 to it, right ?

 

If I’m using an ATmega32, PB5 is the MOSI pin. So I assume the code will be :

PB5 = 00000000000010110000000100000010 ; //Figure 14

Am I right ?

No, you're not. You need to split the above into bytes and write individual bytes to SPDR and wait for the transmission to complete before sending the next byte.
http://maxembedded.com/2013/11/the-spi-of-the-avr/

 

the reset means what the values in the registers are after reset.

 

the reset means what the values in the registers are after reset.

thanks !

 

No, you're not. You need to split the above into bytes and write individual bytes to SPDR and wait for the transmission to complete before sending the next byte.
http://maxembedded.com/2013/11/the-spi-of-the-avr/

Aaaa ok ! Thanks !

 

Use atmega32 spi library.