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ISP over SPI

Question asked by Tomislav Denis on May 21, 2019
Latest reply on May 21, 2019 by jeremyzhou

Hi everyone,

 

I am using a LPC5418 (OM13094 demo board).

I am trying to do ISP over SPI and after sending appropriate SPI command I would like to read response!

My first try was to simply read response by writing appropriate number of 0x00 to LPC and shifting out response. This works but I have problem that ISP command handler tries to decode those 0x00 and interprets them as new command! So at the end when executing next command I am getting response INVALID_COMMAND (0x55 0x00 0x04 0x00 0x01).

 

My quations are:
- Is there any special command that I need to use when reading response? Or I simply have to read response(from previous command) when executing next command?
- Is there any ISP over SPI host tool(example)?
- Better documentation on this topic than LPC546xx User manual?

 

Thanks!

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