SPI Test that Doesn't work

Broken SPI.c

/* makes capturing the output with a logic analyzer easier */
#define FLAG_ON gpio_set(GPIOC, GPIO2)
#define FLAG_OFF gpio_clear(GPIOC, GPIO2)

/*
 * This then sets up the SPI2 port
 */
void
spi_test(void) {
    rcc_periph_clock_enable(RCC_SPI1);
    /* Move the GPIO B bits over Alternate Function 5 -- SPI #1 */
    gpio_mode_setup(GPIOB, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO3 | GPIO4 | GPIO5);
    gpio_set_af(GPIOB, GPIO_AF5, GPIO3 | GPIO4 | GPIO5);
    /* Initialize us as a MASTER, Mode 0, FPCLK/16, SPI port */
    spi_init_master(SPI1, SPI_CR1_BAUDRATE_FPCLK_DIV_16,
                          SPI_CR1_CPOL_CLK_TO_0_WHEN_IDLE,
                          SPI_CR1_CPHA_CLK_TRANSITION_1,
                          SPI_CR1_DFF_8BIT,
                          SPI_CR1_MSBFIRST);
    /* Enable SPI */
    spi_enable(SPI1);

    /* Run the test, end out four bytes */
    FLAG_ON;
    spi_send(SPI1, 0x55);
    spi_send(SPI1, 0xAA);
    spi_send(SPI1, 0x0);
    spi_send(SPI1, 0xff);
    FLAG_OFF;
    while(1) ;
}