My "Library" for ST7920 Graphical displays, works fine, but...

[CuriousOne]

Well I tried software SPI with MAX7219 and was not impressed at all - updating 32x8 pixels led display was quite slow....

[HenrikOlsson]

So if you have simple, clean to understand code for working with MSSP in PBP, I'd like to have a look...

I'll just point to MELABS: https://melabs.com/samples/PBP-mixed/spimast.htm That example is what I used as a basis when I first used the MSSP module for SPI (for interfacing the W5100 (search the forum for that code if you want)). See, not a single line of assembly.

[CuriousOne]

Thanks, but that code is missing SSPBUF declaration?

[HenrikOlsson]

No.
SSPBUF is the Synchronous Serial Port Receive Buffer/Transmit Register. It's the name of register to/from which you write/read whatever gets shifted out.

[CuriousOne]

Good.
So I have to "learn" to use SPI eeprom 1st, and then use MSSP
By the way, if I leave current setup as is - using I2C, but use PIC running at say 32mhz (instead of current 8mhz), will this result 4x times faster reading speed or not?

[HenrikOlsson]

Have you measure what clock speed you're getting?
Standard "high speed" I2C clock is 400kHz, maximum clock speed of a Microchip 24C256 when run at >2.5V is 1MHz.
SPI-interface flash chips usually has a maximum clock frequency of at least 33MHz.

[CuriousOne]

Not yet, but will do. Measure what, I2C clock frequency?
Tried modifying code in a way, that only that part of screen is redrawn, which is being updated. For some uses it does helps, but not always.