best protocol to interface GPS, GSM, Memory chip to PIC?

[Gokul_India]

Which is the best protocol(like SPI, I2C,USART,etc..) to interface


1) GSM module
2) GPS module
3) Memory chip


to a PIC(16f877a) Microcontroller......??? why?? Give the reasons to plsss!!

 

[ckshivaram]

GSM and GPS are based on serial communication through UART. memory chips are usually supported by I2C protocol.. what explanation you need....

 

[engshahrul]

GSM use protocol AT Command. GPS use protocol NMEA 0183. Both based on UART.
If you want, you can use PIC to interface UART and convert to SPI. Then both GSM and GPS can interface to main PIC using SPI.

 

[ckshivaram]

GSM use protocol AT Command

AT commands are not protocol.... modem uses serial communication protocol. there are other protocols used in GPS other than NMEA.. Not all GPS supports NMEA..

the other GPS related protocols are SIRF, TSIP (Trimble Standard Interface Protocol), TAIP Trimble ASCII Interface Protocol......

 

[gajendra_808]

spi is better if you require high speed and if you require acknowledgement mechanism at that time you also use i2c protocol ..............

---------- Post added at 14:27 ---------- Previous post was at 14:24 ----------

spi is better for higher speed and if you require acknowledgement at that time use I2C protocol................

---------- Post added at 14:29 ---------- Previous post was at 14:27 ----------

spi is better for higher speed if you require ack. at that time use I2C protocol.......................