I might be reading the lispBM README incorrectly but I was expecting gpio-hold to work. Everything else like gpio-read and gpio-write works.
When I look at the lispif_vesc_extensions.c in the vedderb/bldc github I see at least references to the read & write:
// GPIO
lbm_add_extension("gpio-configure", ext_gpio_configure);
lbm_add_extension("gpio-write", ext_gpio_write);
lbm_add_extension("gpio-read", ext_gpio_read);
// Configuration
...But I don't see gpio-hold referenced anywhere. Is gpio-hold something new planned for the next release?