ft245rl.c

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#include "hw/hw_ft245rl.h"
#include "ft245rl.h"

#include <cfg/macros.h>
#include <cfg/debug.h>
#include <cfg/module.h>

#include <drv/timer.h>

#include <kern/kfile.h>

#include <string.h>


MOD_DEFINE(ft245rl);

static size_t ft245rl_read(struct KFile *_fd, void *_buf, size_t size)
{
    Ft245rl *fd = FT245RL_CAST(_fd);
    (void)fd; //unused
    uint8_t *buf = (uint8_t *)_buf;
    size_t total_read = 0;

    while (size--)
    {
        while(!FT245RL_DATA_RDY())
            /* busy waiy */;

        *buf++ = FT245RL_GETDATA();
        total_read++;
    }

    return total_read;
}

static size_t ft245rl_write(struct KFile *_fd, const void *_buf, size_t size)
{
    Ft245rl *fd = FT245RL_CAST(_fd);
    (void)fd; //unused
    const uint8_t *buf = (const uint8_t *)_buf;
    size_t total_write = 0;

    while (size--)
    {
        while(!FT245RL_TX_ALLOWED())
            /* busy waiy */;

        FT245RL_SETDATA(*buf++);
        total_write++;
    }

    return total_write;
}

void ft245rl_init(Ft245rl *fd)
{
    memset(fd, 0, sizeof(*fd));
    DB(fd->fd._type = KFT_FT245RL);

    // Setup data ft245rl communication functions.
    fd->fd.read = ft245rl_read;
    fd->fd.write = ft245rl_write;

    FT245RL_INIT();
    while (FT245RL_DATA_RDY())
        FT245RL_GETDATA();

    MOD_INIT(ft245rl);
}