I have started using Raspberry Pi a few time ago, its interesting to use. I have some questions
1. I need to know GPS modules which I can interface with Raspberry Pi on I2C or SPI interface because my UART is busy
2. I studies a lot and found that I2C interface is slow but battery saver and SPI is fast, how does it help me decide GPS module
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bansinickname
- Posts: 4
- Joined: Tue Apr 19, 2016 5:08 am
Re: GPS Module Interfacing not on UART
would it be a way to interface the Pi to an Arduino Due (!) by i2c and attach the GPS module to Arduino-UART?
I did that already on another platform (EV3 - Arduino - GPS): http://www.mindstormsforum.de/viewtopic ... 673#p67709
about speed: it's not an issue.
1st, UART runs at 115200 baud, and i2c at 100kHz, which is almost the same,
OTOH GPS signals are updated just a couple of times each second.
I did that already on another platform (EV3 - Arduino - GPS): http://www.mindstormsforum.de/viewtopic ... 673#p67709
about speed: it's not an issue.
1st, UART runs at 115200 baud, and i2c at 100kHz, which is almost the same,
OTOH GPS signals are updated just a couple of times each second.
#define S sqrt(t+2*i*i)<2
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}
Re: GPS Module Interfacing not on UART
You can receive serial data on arbitrary GPIO using bit banging. There shouldn't be any problem handling typical GPS speeds of 4800 bps.
Re: GPS Module Interfacing not on UART
for that purpose a handy and convenient lib like Arduino's SoftwareSerial Library would be very helpful!
https://www.arduino.cc/en/Reference/softwareSerial
https://www.arduino.cc/en/Tutorial/Soft ... ialExample
https://www.arduino.cc/en/Reference/softwareSerial
https://www.arduino.cc/en/Tutorial/Soft ... ialExample
#define S sqrt(t+2*i*i)<2
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}
Re: GPS Module Interfacing not on UART
Or, add a cheap Bluetooth module and a battery to the GPS. Gives you some flexibility in placement.
[EDIT: viewtopic.php?p=734870#p734870]
[EDIT: viewtopic.php?p=734870#p734870]
Last edited by Douglas6 on Tue Apr 19, 2016 7:54 pm, edited 2 times in total.
Re: GPS Module Interfacing not on UART
ok, or, if USB is available:
a ch341 USB-to-UART-converter
http://www.mindstormsforum.de/viewtopic ... 907#p67830
http://www.ebay.de/itm/USB-Seriell-TTL- ... Swq7JUKBcV
a ch341 USB-to-UART-converter
http://www.mindstormsforum.de/viewtopic ... 907#p67830
http://www.ebay.de/itm/USB-Seriell-TTL- ... Swq7JUKBcV
#define S sqrt(t+2*i*i)<2
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}
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bansinickname
- Posts: 4
- Joined: Tue Apr 19, 2016 5:08 am
Re: GPS Module Interfacing not on UART
Thanks for all the replies but my question was not exactly answered.
If I am not implemeting GPS Module on UART, neither USB too then I have been left with SPI & I2C Interface
So please help with I2C and SPI GPS solutions
If I am not implemeting GPS Module on UART, neither USB too then I have been left with SPI & I2C Interface
So please help with I2C and SPI GPS solutions
Re: GPS Module Interfacing not on UART
I have searched a long time for i2c for another MCU platform and found nothing, the reason might be the specific GPS data transmission protocol which is serial (UART).
So interfacing a UART GPS device to an Arduino and then interfacing the Arduino to the Pi by I2c (as I already suggested above) would be the only way AFAIK.
(CMIIW)
So interfacing a UART GPS device to an Arduino and then interfacing the Arduino to the Pi by I2c (as I already suggested above) would be the only way AFAIK.
(CMIIW)
#define S sqrt(t+2*i*i)<2
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}
#define F(a,b) for(a=0;a<b;++a)
float x,y,r,i,s,j,t,n;int main(){F(y,64){F(x,99){r=i=t=0;s=x/33-2;j=y/32-1;F(n,50&S){t=r*r-i*i;i=2*r*i+j;r=t+s;}if(S){PointOut(x,y);}}}for(;;);}