I’m working on a project where I need to implement a safety mechanism test using SPI communication, and I could really use some help. I’m using the Analog Discovery 3 for this task.
Objective:
SPI Channel 1 (configured as a slave) will receive data.
If the incoming data matches a specific pattern, I want to modify this data.
Then, the modified data should be transmitted on SPI Channel 2 (configured as a master).
What I Have So Far:
I’ve managed to set up basic SPI communication, but I’m having trouble figuring out how to implement this dual-channel setup, where one channel reads as a slave and the other transmits as a master after modifying the data.
Specifics:
SPI Channel 1 (Slave): Should continuously listen for incoming data.
Data Matching: When specific data (e.g., 0x00 0x01 0x01 0x00 0x01 0xF4) is received on the slave channel, I need to modify the last byte (e.g., change 0xF4 to 0xF5).
SPI Channel 2 (Master): The modified data should then be sent out from the master channel.
Has anyone implemented something similar using Analog Discovery 3? Could you provide guidance or sample scripts on how to configure both channels (one as slave, one as master), handle the data modification, and write the data to another channel?
Any advice, example scripts, or resources would be greatly appreciated!
// Initialize SPI communicationvar CH1_cs =0;// Chip select for Channel 1 (slave)var CH2_cs =1;// Chip select for Channel 2 (master)Protocol.SPI.Receiver(CH1_cs);// Start receiver for Channel 1 (slave)// Loop for continuous operationwhile(wait()){// Receive data on Channel 1 (slave)var rg =Protocol.SPI.Receive(CH1_cs);// Receiving data from SPI slave channelvar c = rg.length;if(!c)continue;// Build MOSI string for comparisonvar szMosi ="MOSI: ";var mosiValues =[];for(var i =0; i < c; i+=2){// Convert to hex and pad with leading zero if necessaryvar mosiHex = rg[i].toString(16).toUpperCase();if(mosiHex.length <2) mosiHex ='0'+ mosiHex;
mosiValues.push(mosiHex);
szMosi +=" 0x"+ mosiHex;}
print(szMosi);// Check if MOSI is exactly "0x00 0x01 0x01 0x00 0x01 0xF4"if(mosiValues.join(' ')==="00 01 01 00 01 F4"){
print("Matching data found. Changing last value to 0xF5...");// Modify the last MOSI value from 0xF4 to 0xF5
rg[rg.length -2]=0xF5;// Modify the MOSI part of the data// Send the modified data through Channel 2 (master)//Protocol.SPI.Transmit(rg, CH2_cs); // Master transmits on Channel 2//Protocol.SPI.Write(8,[0x00,0x01,0x01,0x00,0x01,0xF4])// Print the modified datavar modifiedMosi ="MOSI: ";for(var i =0; i < c; i+=2){var mosiHex = rg[i].toString(16).toUpperCase();if(mosiHex.length <2) mosiHex ='0'+ mosiHex;
modifiedMosi +=" 0x"+ mosiHex;}
print("Modified "+ modifiedMosi);}
print("---");}
Question
injection
Hello everyone,
I’m working on a project where I need to implement a safety mechanism test using SPI communication, and I could really use some help. I’m using the Analog Discovery 3 for this task.
Objective:
What I Have So Far:
I’ve managed to set up basic SPI communication, but I’m having trouble figuring out how to implement this dual-channel setup, where one channel reads as a slave and the other transmits as a master after modifying the data.
Specifics:
Has anyone implemented something similar using Analog Discovery 3? Could you provide guidance or sample scripts on how to configure both channels (one as slave, one as master), handle the data modification, and write the data to another channel?
Any advice, example scripts, or resources would be greatly appreciated!
Link to comment
Share on other sites
4 answers to this question
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now