Guest Posted May 15, 2016 Posted May 15, 2016 I want to build a GPS timeserver like http://rdlazaro.info/compu-Raspberry_Pi-RPi-stratum0.html I modified the kernel config to use the pps-gpio module in kernel , but since H3 linux kernel don't support device tree yet, Is there any method to assign a GPIO pin to this module ? I don't want to hard-code in the source code .
martinayotte Posted May 15, 2016 Posted May 15, 2016 Why do you say that H3 doesn't support device tree yet ? It does, but not using Legacy ! But maybe you mean it doesn't support "overlays" yet ...
Guest Posted May 16, 2016 Posted May 16, 2016 Maybe I can add a pps-gpio section in .dts file in u-boot source?
martinayotte Posted May 16, 2016 Posted May 16, 2016 Yes, that is the way to do, using dtc to decompile/recompile the dtb.
Guest Posted May 19, 2016 Posted May 19, 2016 I plug the GPS module PPS output to OPiOne's GPIO pin PG09, modify fex file to release PG09 from GPIO, and then run gpsd, PPS worked! It's very strange, no any device tree setup.
vlad59 Posted May 19, 2016 Posted May 19, 2016 If you're using a fex file then you're using a old kernel 3.4.XXX. Newer kernel use DT
Guest Posted May 19, 2016 Posted May 19, 2016 You're so humor. The default kernel for Armbian on H3 is 3.4.112 . At last, I found this https://github.com/infinet/bananapi.git , very amazing.
StaLeWaR Posted September 5, 2016 Posted September 5, 2016 I do not understand how he did it ...Can somebody explain?I would like to repeat it
Guest Posted September 6, 2016 Posted September 6, 2016 modify fex file like this: [uart1] uart_used = 1 uart_port = 1 # 2 for 2-wire uart_type = 2 uart_tx = port:PG06<2><1><default><default> uart_rx = port:PG07<2><1><default><default> [gpio_para] gpio_used = 1 gpio_num = 16 ... #gpio_pin_17 = port:PG09<0><default><default><0> #for UART1 #gpio_pin_18 = port:PG06<1><default><default><default> #gpio_pin_19 = port:PG07<1><default><default><default>
StaLeWaR Posted September 6, 2016 Posted September 6, 2016 Thanks for the answer! With this no problems.I wanted to know how to assign a pin to PPS? use path https://github.com/infinet/bananapi as you pointed out the pin? options pps-gpio gpio_pin=PG09 or options pps-gpio gpio_pin=17
Guest Posted September 7, 2016 Posted September 7, 2016 o, PG09 is GPIO 201, so yaofei@opigps:/etc$ more modprobe.d/pps-gpio.conf #PG9 = 32*6 + 9 = 201 options pps-gpio gpio_pin=201
StaLeWaR Posted September 7, 2016 Posted September 7, 2016 Wow What is then the algorithm counting pins? PA = 0 PB = 1 PC = 2 PD = 3 PE = 4 PF = 5 PG = 6 Physical pin 18 this PC07 pin H3 PC07 = 32*2 + 7 = 71 This is the correct understanding?
Guest Posted September 7, 2016 Posted September 7, 2016 Wow What is then the algorithm counting pins? PA = 0 PB = 1 PC = 2 PD = 3 PE = 4 PF = 5 PG = 6 Physical pin 18 this PC07 pin H3 PC07 = 32*2 + 7 = 71 This is the correct understanding? Yeah, you're so smart .
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