Camera board • Re: RPI Zero - Baremetal Unicam / CSI-2 Camera

I did several fixes, rebased the code based on libcamera instead of raspiraw, I think I enabled power domain properly as well, and I see some progresses when I enable RX and streaming

CAM_IBWP 0xdf203000

Before WP was staying to zero, but now the Write Pointer is set to the initial DMA address, but when I try to read from the allocation, it's all zero

https://github.com/adafruit/broadcom-pe ... cmailbox.c
vcmailbox_set_power_state -> vcmailbox_set_power_domain_state (on 12, 13 and 14, should be the 13 or 14)
tag->tag = VCMAILBOX_TAG_SET_POWER_STATE; -> VCMAILBOX_TAG_SET_POWER_DOMAIN_STATE (created the define for it)
tag->request.state = on ? 0x3 : 0x2; -> tag->request.state = on ? 0x1 : 0x0;
tag size is 8 (same as set_power_state), and set returns status 1

https://github.com/adafruit/circuitpyth ... mebuffer.c
https://github.com/adafruit/broadcom-pe ... cmailbox.c
for allocating the buff -> vcmailbox_get_framebuffer (with the biggest size i could set), i get 0x1F203000

then i set
nDMAAddress = BUS_ADDRESS(0x1F203000) = 0xdf203000

(it's a rpi zero)
GPU_UNCACHED_BASE = 0xC0000000
GPU_MEM_BASE = GPU_UNCACHED_BASE

def BUS_ADDRESS(addr):
return ((addr) & ~0xC0000000) | GPU_MEM_BASE

and set it

write_register(ARM_CSI1_BASE, UNICAM_IBSA0, nDMAAddress)
write_register(ARM_CSI1_BASE, UNICAM_IBEA0, nDMAAddress)

is it correct? any other hint?

Statistics: Posted by bitcoincomfy — Mon Apr 01, 2024 7:48 pm

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