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Hi N,They are VERY simple to use, and come pre-configured so you don't even need to alter any settings (unless you want to).
hi C,
This link to an Article for the HC12
E
From SPI puzzle thread (ERIC GIBBS):
hi,
I guess you know NSS is /CS .?? [NOT CS]
Where is the RESET connected.?
Are the DIO pins allowed to 'float' the datasheet should tell you.
As you say the PCB requires a 3.3v supply.
I usually add a 10k pull up on MISO
E
EDIT:
1/ [[[ How are you planning to get the 18F2431 PIC to communicate via RS232 to the other PIC.???? ]]]
hi C,
2/ [[[ This is a clip from my circuit showing the SPI and 74HC125 level shifter. ]]]
There are 100R's in series with the three PIC output pins to the HC125.
The logic +5v High input current should be limited to < 20mA when powering the HC125 with3.3v.
[I have sometimes used the HC without the 100R's with no problems, but I would not recommend this way]
Note the 10k pull up for MISO.
E
Attached Files:
A04.gif
File size:
11.9 KB
Am I correct that the MCLR and SX1276 RESET should be pulled to GND by a button?
The PIC MCLR is active Low, the datasheet for the SX should tell you if the RESET is active High or Low.
As it is labelled RESET I would assume that its active HIGH, check the d/s.
hi C,
Are you saying you do not see any correlation with these read out values and the Table. image A01.??????
I do.
E
Here is what is produced on the LCD
0x00 shows 0
0x01 4
0x02 0
0x03 26
0x04 11
0x05 0
0x06 82
0x07 228
0x08 192
0x09 0
0xoa 65
BTW:
What is this line for.???
'SPISend 0x02 '0x02 is SPI WRITE COMMAND
hi,
The values in your Table are HEX values, the values Read by your Oshonsoft program are in Decimal.
If you recall I asked are you including the OR 0x80 command when you Write a command to the Radio.??
Looking at the LORA listing for Writing to the radio all the Commands are are Ored with 0x80, I believe the radio always expects the MSBit SET to indicate it's a WRITE command.
Post the information for the Radio commands.
E
Hi Eric,hi C,
Download this PDF
https://www.google.co.uk/url?sa=t&rct=j&q=&esrc=s&source=web&cd=1&ved=0ahUKEwjpw9704cvQAhVsB8AKHcWaBe4QFggdMAA&url=https://www.semtech.com/images/datasheet/sx1276_77_78_79.pdf&usg=AFQjCNFxkfmyuNwFCcaP_-dWGKdmskNKBQ&cad=rja
Look at section 4.3 SPI access Page #80
Note what it says about Writing to the Registers, Bit 7 set High.
E