Hardware Overviwe The RK3588 exposes four native SPI controllers. Each controller can be clocked up to 50 MHz in master mode and supports 8-bit or 16-bit word lengths. The pin mapping is fixed: SPI0_MOSI – GPIO4_B0 SPI0_MISO – GPIO4_B1 SPI0_CLK – GPIO4_B2 SPI0_CS0 – GPIO4_B3 These pins are 3.3 V tol...
System Configuration and Fundamental Concepts Hardware and Virtual Machine Setup For embedded Linux development, the setup involves a development board, a Windows machine, and a virtual environment. There are three network adapter modes for virtual machines: VMnet1 (Host-Only): Enables communication...
Kernel virtual address map on 32‑bit ARM PAGE_OFFSET: base of kernel virtual space at 0xC000_0000 lowmem: direct linear mapping of RAM into the kernel (virt = phys + PAGE_OFFSET); capped at 896 MiB HIGH_MEMORY: first virtual address not linearly mapped (end of lowmem) pkmap: permanent mappings for h...