usb_request_status_t usb_vendor_request_write_spiflash(
usb_endpoint_t* const endpoint, const usb_transfer_stage_t stage)
{
uint32_t addr = 0;
uint16_t len = 0;
if (stage == USB_TRANSFER_STAGE_SETUP) {
addr = (endpoint->setup.value << 16) | endpoint->setup.index;
len = endpoint->setup.length;
if ((len > spi_flash.page_len) || (addr > spi_flash.num_bytes)
|| ((addr + len) > spi_flash.num_bytes)) {
return USB_REQUEST_STATUS_STALL;
} else {
usb_transfer_schedule_block(endpoint->out, &spiflash_buffer[0], len,
NULL, NULL);
spi_bus_start(spi_flash.bus, &ssp_config_w25q80bv);
w25q80bv_setup(&spi_flash);
return USB_REQUEST_STATUS_OK;
}
} else if (stage == USB_TRANSFER_STAGE_DATA) {
addr = (endpoint->setup.value << 16) | endpoint->setup.index;
len = endpoint->setup.length;
/* This check is redundant but makes me feel better. */
if ((len > spi_flash.page_len) || (addr > spi_flash.num_bytes)
|| ((addr + len) > spi_flash.num_bytes)) {
return USB_REQUEST_STATUS_STALL;
} else {
w25q80bv_program(&spi_flash, addr, len, &spiflash_buffer[0]);
usb_transfer_schedule_ack(endpoint->in);
return USB_REQUEST_STATUS_OK;
}
} else {
return USB_REQUEST_STATUS_OK;
}
}
int main(void)
{
int i;
uint8_t buf[515];
pin_setup();
enable_1v8_power();
cpu_clock_init();
/* program test data to SPI flash */
for (i = 0; i < 515; i++)
buf[i] = (i * 3) & 0xFF;
w25q80bv_setup();
w25q80bv_chip_erase();
w25q80bv_program(790, 515, &buf[0]);
/* blink LED1 and LED3 */
while (1)
{
gpio_set(PORT_LED1_3, (PIN_LED1|PIN_LED3)); /* LEDs on */
for (i = 0; i < 8000000; i++) /* Wait a bit. */
__asm__("nop");
gpio_clear(PORT_LED1_3, (PIN_LED1|PIN_LED3)); /* LED off */
for (i = 0; i < 8000000; i++) /* Wait a bit. */
__asm__("nop");
}
return 0;
}
