KansaiRobot
Member
Hello and thanks always.
I am building a system using SPI. I have implemented several configurations on a breadboard and they work great. I use the following boards (sorry in japanese) that are basically fancy versions of the PIC 18F4553 and 18F2553.
https://akizukidenshi.com/catalog/g/gK-06720/
https://akizukidenshi.com/catalog/g/gK-08010/
I also use a simple PIC 18F2550
The problem is when I tried to put this configuration on a perfboard, they fail. In one case they transmit correct characters sometimes and incorrect other times. In the other case the slave only transmits 0xFF.
I have checked and double checked. The connections are ok. The programs work (on the breadboard that is) correctly. I have run out of ideas of what could be wrong.
I know it is a mess of cables but I ve originally neat thin lead cables on the back but they didn't work so I ve tried these cables...
Any, and I mean any ideas that can give me some light are welcomed. Need some help here.
I am building a system using SPI. I have implemented several configurations on a breadboard and they work great. I use the following boards (sorry in japanese) that are basically fancy versions of the PIC 18F4553 and 18F2553.
https://akizukidenshi.com/catalog/g/gK-06720/
https://akizukidenshi.com/catalog/g/gK-08010/
I also use a simple PIC 18F2550
The problem is when I tried to put this configuration on a perfboard, they fail. In one case they transmit correct characters sometimes and incorrect other times. In the other case the slave only transmits 0xFF.
I have checked and double checked. The connections are ok. The programs work (on the breadboard that is) correctly. I have run out of ideas of what could be wrong.
![cap3.jpg cap3.jpg](https://www.electro-tech-online.com/data/attachments/82/82917-1352d6d36f68dade394ef1aa78bd4193.jpg)
I know it is a mess of cables but I ve originally neat thin lead cables on the back but they didn't work so I ve tried these cables...
Any, and I mean any ideas that can give me some light are welcomed. Need some help here.