Esempi in C++ (Cpp) per spi_set_max_speed

Esempio n. 1

File: st7735.c Progetto: ebirger/tinkerpal

static void chip_init(st7735_t *screen)
{
    gpio_set_pin_mode(screen->params.rst, GPIO_PM_OUTPUT);
    gpio_set_pin_mode(screen->params.cs, GPIO_PM_OUTPUT);
    gpio_set_pin_mode(screen->params.cd, GPIO_PM_OUTPUT);
    gpio_set_pin_mode(screen->params.backlight, GPIO_PM_OUTPUT);

    /* Reset */
    gpio_digital_pulse(screen->params.rst, 0, 10);

    gpio_digital_write(screen->params.cd, 0);
    gpio_digital_write(screen->params.cs, 1);
    gpio_digital_write(screen->params.backlight, 1);

    /* Init SPI */
    spi_init(screen->params.spi_port);
    spi_set_max_speed(screen->params.spi_port, 4000000);

    /* Send init sequence */
    st7735_init_seq(screen);
}

Esempio n. 2

File: lua_spi.c Progetto: coolwaterld/lua-periphery

static int lua_spi_newindex(lua_State *L) {
    spi_t *spi;
    const char *field;

    spi = luaL_checkudata(L, 1, "periphery.SPI");

    if (!lua_isstring(L, 2))
        return lua_spi_error(L, SPI_ERROR_ARG, 0, "Error: unknown property");

    field = lua_tostring(L, 2);

    if (strcmp(field, "fd") == 0)
        return lua_spi_error(L, SPI_ERROR_ARG, 0, "Error: immutable property");
    else if (strcmp(field, "mode") == 0) {
        unsigned int mode;
        int ret;

        lua_spi_checktype(L, 3, LUA_TNUMBER);
        mode = lua_tounsigned(L, 3);

        if ((ret = spi_set_mode(spi, mode)) < 0)
            return lua_spi_error(L, ret, spi_errno(spi), "Error: %s", spi_errmsg(spi));

        return 0;
    } else if (strcmp(field, "max_speed") == 0) {
        uint32_t max_speed;
        int ret;

        lua_spi_checktype(L, 3, LUA_TNUMBER);
        max_speed = lua_tounsigned(L, 3);

        if ((ret = spi_set_max_speed(spi, max_speed)) < 0)
            return lua_spi_error(L, ret, spi_errno(spi), "Error: %s", spi_errmsg(spi));

        return 0;
    } else if (strcmp(field, "bit_order") == 0) {
        const char *s;
        spi_bit_order_t bit_order;
        int ret;

        lua_spi_checktype(L, 3, LUA_TSTRING);

        s = lua_tostring(L, 3);
        if (strcmp(s, "msb") == 0)
            bit_order = MSB_FIRST;
        else if (strcmp(s, "lsb") == 0)
            bit_order = LSB_FIRST;
        else
            return lua_spi_error(L, SPI_ERROR_ARG, 0, "Error: invalid bit_order, should be 'msb' or 'lsb'");

        if ((ret = spi_set_bit_order(spi, bit_order)) < 0)
            return lua_spi_error(L, ret, spi_errno(spi), "Error: %s", spi_errmsg(spi));

        return 0;
    } else if (strcmp(field, "bits_per_word") == 0) {
        uint8_t bits_per_word;
        int ret;

        lua_spi_checktype(L, 3, LUA_TNUMBER);
        bits_per_word = lua_tounsigned(L, 3);

        if ((ret = spi_set_bits_per_word(spi, bits_per_word)) < 0)
            return lua_spi_error(L, ret, spi_errno(spi), "Error: %s", spi_errmsg(spi));

        return 0;
    } else if (strcmp(field, "extra_flags") == 0) {
        uint8_t extra_flags;
        int ret;

        lua_spi_checktype(L, 3, LUA_TNUMBER);
        extra_flags = lua_tounsigned(L, 3);

        if ((ret = spi_set_extra_flags(spi, extra_flags)) < 0)
            return lua_spi_error(L, ret, spi_errno(spi), "Error: %s", spi_errmsg(spi));

        return 0;
    }

    return lua_spi_error(L, SPI_ERROR_ARG, 0, "Error: unknown property");
}