FSMC vs GPIO

[rsharifi9]

Posted on July 29, 2017 at 06:16

hi everybody,

i have worked tft projects through normal gpio pins, ie a parallel bus + some control lines, since now.

i saw the FSMC in the STM32F407 micro controller which can do that for me.

i don't know the difference between these tow method.

thanks, Rasool

#gpio #tft #fsmc #lcd #stm32

[Tesla DeLorean]

Posted on July 29, 2017 at 06:42

The address, data and control signals are sequenced in hardware rather than bit-banging. Review the timing diagrams, and signal parameters described in the Reference Manual. It's an external memory bus, similar to those used with micro-controllers for several decades.

[rsharifi9]

Posted on July 29, 2017 at 13:10

if i think true the cpu load decreases.

is the 'time to display' and in fact transfer time from mcu to lcd controller decrease?

what about for power consumption?

[Tesla DeLorean]

Posted on July 29, 2017 at 15:46

>>what about for power consumption?

Well the bus transaction will be more efficient. But you could also saturate the bus at a much higher rate. Power consumption will depend on the duty cycle of your use case.

Measure, then compare and contrast.