stm32mp1 - Dan's notes

TCXO RTC Raspberry Pi Hat, part 2

The motivation for this project is NTP servers in datacenters - it can be expensive to get a GPS antenna on top of other people's buildings with a wire running down into your

ntp

Embedded NTP client/NTP interleaved mode, part 5

I'll test what happens when I plug my embedded NTP client directly into my NTP servers, bypassing the Ethernet switch. This ends my long running embedded NTP client series. The systems involved Embedded

ntp

STM32MP1 NTP server, part 3

Previous posts: part 1 [https://blog.dan.drown.org/stm32mp1-ntp-server/], part 2 [https://blog.dan.drown.org/stm32mp1-ntp-server-part-2/], NTP client [https://blog.dan.drown.org/embedded-ntp-client-ntp-interleaved-mode-part-3/] The NTP client confirmed that there was

ntp

Embedded NTP client/NTP interleaved mode, part 3

Previous posts: part 1 [https://blog.dan.drown.org/archmax-ntp-client/], part 2 [https://blog.dan.drown.org/embedded-ntp-client-ntp-interleaved-mode-part-2/] In this post, I wrap up my embedded NTP client and use it to measure

stm32mp1

STM32MP1 NTP server, part 2

Previous post: https://blog.dan.drown.org/stm32mp1-ntp-server/ [https://blog.dan.drown.org/stm32mp1-ntp-server/] I figured out my offset problem, which was not a PLL problem like I thought. Connman has a NTP

ntp

STM32MP1 NTP server

Previous post: Debian for STM32MP1 [https://blog.dan.drown.org/debian-for-stm32mp1/] NIC Hardware Timestamps First step: enable hardware timestamps in chrony.conf: chrony configuration for hardware timestampsNext, enable chrony's measurements log, and verify

stm32

Debian for STM32MP1

I bought a STM32MP1 dev board [https://www.st.com/en/evaluation-tools/stm32mp157a-dk1.html] because it has a gigabit NIC with 1588 PTP timestamps as well as hardware timers that can timestamp PPS