[yocto] Raspberrypi bare-metal interfaced to PMod GPS receiver
develone at sbcglobal.net
Thu Jun 22 11:42:50 PDT 2017
Just completed the interface of a http://store.digilentinc.com/pmod-gps-gps-receiver/$39.99 with RPi 2B Running Ultibo Bare metal on Raspberrypi2B & PMOD GPS with just 4 fileskernel7.img, start.elf, bootcode.bin, and fixup.dat.Receives GPS data on UART and sends message on Ethernet using UDP.More information see https://ultibo.org/ on bare metal project and https://github.com/develone/ultibo_serial_testingOn what creates the kernel7.img, see the README.md
One of many messages sent by GPS receiver.
$GPGGA,132531.000,3145.5590,N,10620.5407,W,2,9,0.89,1209.1,M,-26.2,M,0000,0000*5Btime 132531.000Latitude 3145.5590 NLongitude 10620.5407 WElevation 1209.1 MThe program calls C to compute the checksum.
The Check sum of the character between the "$" and the "*"81 bytes readThe checksum of ch_sum_test.dat is 0x5bComputed by taking the checksum Exclusive or with each character.
Let me know if this of interest..
Edward Vidal Jr. e-mail develone at sbcglobal.net 915-595-1613
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