Hi L4 Hackers, Im currently running Fiasco.OC with L4Re on my BananaPi. I'm trying to control a serial device (Pololu Servo Controller) by sending a small series of Bytes over a second UART ( not UART 0 since im getting the console from there ). Via documentation I've found out that UART 3 is at 0x01C28C00 and is a U6_16550A, so I'm hoping the driver in /pkg/drivers-frst/uart/src/uart_pxa.cc will be compatible with that. Where and how would I have to go about initiating my UART 3? By writing a new platform for BPi in /pkg/bootstrap/server/src/platform? The function set_stdio_uart(&_uart); made me think its only the "console" UART. Or do I have to instantiate some kind of Hw.Device like the gpio in /pkg/io/config/arm-omap3.devs and put it on a new vBus like in /pkg/io/doc/example.io ?
Or am I thinking way too complicated and it is as simple as editing the /pkg/serial-drv/server/src/main.cc :
bool Serial_drv::init() { int irq_num = 37; // How can i find out what this number refers to/do i have to change it at all? l4_addr_t phys_base = 0x1000a000; // change to 0x01C28C00 #if 0 int irq_num = 74; l4_addr_t phys_base = 0x49020000; #endif l4_addr_t virt_base = 0;
if (l4io_request_iomem(phys_base, 0x1000, L4IO_MEM_NONCACHED, &virt_base)) { printf("serial-drv: request io-memory from l4io failed.\n"); return false; } printf("serial-drv: virtual base at:%lx\n", virt_base);
L4::Io_register_block_mmio *regs = new L4::Io_register_block_mmio(virt_base); _uart = new (malloc(sizeof(L4::Uart_pl011))) L4::Uart_pl011(24019200); //change to L4::Uart_pxa(what does this number mean?) _uart->startup(regs);
Thanks for any answers in advance.
Regards, Clemens c...@mytum.de