Hi Ken - excellent news! I'll update my code here as well, I'm happy you've found how to make it better

What might be interesting to you as well is if you want to see the radio text information, you can use

if ((this.Si4703_Registers[RDSB] >> 11) == 4 || (this.Si4703_Registers[RDSB] >> 11) == 5)
            {
                int Ch = (this.Si4703_Registers[RDSC] & 0xFF00) >> 8;
                int Cl = (this.Si4703_Registers[RDSC] & 0x00FF);
                int Dh = (this.Si4703_Registers[RDSD] & 0xFF00) >> 8;
                int Dl = (this.Si4703_Registers[RDSD] & 0x00FF);

... and convert to ascii, and then the rest of the code goes here, with minor modifications

That's an interesting question about the two boards from one Netduino. I don't know enough about the I2C protocol right now to answer that unfortunately. If you've got two FM boards (even if the first one is only partially working) you might be able to try it, but I guess you might have to revisit the original code and try to eliminate static variables. I don't know how two devices with the same device identifier on the same I2C pins would work - I'd guess it would conflict, because the netduino can't determine which device to talk to at any one time? But it's just a guess.

Cheers,
Jeremy

Hey Ken Well done, and 54 out of 75 is higher than anything I got out in the wilds of the countryside! What I found with the RDS was that I had to tell the device to listen for it for a while. I've written some proof of concept code for it, but as I said before it's a bit of a tangled mess, but it definitely gets text out of the signal. I'll look at the code again this weekend and have a go at tidying it up - but as I remember, the process is: 1. Look at the RDS bit after tuning to a strong channel - keep polling until it until it indicates there's RDS data. 2. When it finds there is RDS data, look at the RDSA, RDSB, RDSC and RDSD registers (details are in data sheet). 3. First look at the RDSA register, shift by 11 bits, if it equals 0 or 1 then it's the station name, if it's 5 or 6 then it's the station information. 4. If you're looking at the station information, then look at the values of the RDSD register - split the dataword into two bytes, convert each from a byte to corresponding ascii character. 5. If you're looking at the station information, then look at the values of the RDSC and RDSD register - split the two datawords into four bytes, convert each from a byte to corresponding ascii character. 6. Build up consecutive letters to make up the station name and information. I've found that station name only ever has 8 characters, station information has many more. I imagine you'll actually have it cracked by this weekend anyway, let me know if you do, but if not I'll try to help out. Hope this is helpful, Jeremy

Hey Ken

Try this, it's only a proof of concept I put together in 20 minutes, so it's not good code or even remotely robust, but it'll get you started I hope:

Add "using System.Collections;" to the Si4703 class I uploaded before.

Also add this code to the same class.

public string PrintRadioName()
        {
            int j = 0;
            string token = "";
            string fullRadioName = "";
            while (true && j < 500)
            {
                j++;
                this.ReadRegisters();
                if ((this.Si4703_Registers[Si4703.STATUSRSSI] & (1 << Si4703.RDSR)) > 1)
                {
                    var radioNameSoFar = this.ReadRadioName();
                    if (radioNameSoFar != null)
                    {
                        if (token != (string)radioNameSoFar.Value)
                        {
                            token = (string)radioNameSoFar.Value;
                            fullRadioName += radioNameSoFar.Value;
                        }

                        if (fullRadioName.Length > 16)
                        {
                            return fullRadioName;
                        }
                    }
                }
            }
            return string.Empty;
        }

        public DictionaryEntry ReadRadioName()
        {
            if ((this.Si4703_Registers[RDSB] >> 11) == 0 || (this.Si4703_Registers[RDSB] >> 11) == 1)
            {
                int Dh = (this.Si4703_Registers[RDSD] & 0xFF00) >> 8;
                int Dl = (this.Si4703_Registers[RDSD] & 0x00FF);

                int infoOrder = (this.Si4703_Registers[RDSB] & 0x00FF);

                var radioName = new System.Text.UTF8Encoding();
                byte blockerrors = (byte)((this.Si4703_Registers[STATUSRSSI] & 0x0600) >> 9); //Mask in BLERA

                DictionaryEntry d;

                if (blockerrors == 0)
                {
                    if ((Dh >= 32 && Dh <= 127) && (Dl >= 32 && Dl <= 127))
                    {
                        var radioChars = radioName.GetChars(new byte[] { (byte)Dh, (byte)Dl });
                        d = new DictionaryEntry(infoOrder, "" + radioChars[0] + radioChars[1]);
                        return d;
                    }
                }
            }
            return null;
        }

And call the "PrintRadioName" method after you tune to a radio station with a strong signal. If there's something there, it should return it into a string variable. I was able to get some RDS information with this, so hopefully it'll work in your part of the world too. Anyway, give it a try and let me know what happens.

Jeremy

Hi Ken To be honest, everything you've put in the last post pretty much covered I've got at home on RDS. Certainly I think your code looks ok - I've found that some channels initially report 'No RDS', but if I poll for a few seconds like in the Arduino code, the RDS comes up. Have you tried polling, say for 60 seconds to see if anything appears in the RDS registers? Jeremy

Thanks Chris, that's great. Jeremy

Is there anywhere I can download the source for this firmware? I've seen a couple of other people post this question but I haven't seen an answer. Or is the firmware source not going to be released until it goes gold? Thanks Jeremy