+++ /dev/null
-/*
- * Copyright © 2014 Keith Packard <keithp@keithp.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write to the Free Software Foundation, Inc.,
- * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
- */
-
-#include <ao.h>
-#include <ao_adc_fast.h>
-#include <ao_crc.h>
-
-static void
-ao_trng_fetch(void)
-{
- static uint16_t *buffer[2];
- uint32_t kbytes = 1;
- uint32_t count;
- int usb_buf_id;
- int i;
- uint16_t *buf;
- uint32_t *rnd;
-
- if (!buffer[0]) {
- buffer[0] = ao_usb_alloc();
- buffer[1] = ao_usb_alloc();
- if (!buffer[0])
- return;
- }
-
- ao_cmd_decimal();
- if (ao_cmd_status == ao_cmd_success)
- kbytes = ao_cmd_lex_u32;
- else
- ao_cmd_status = ao_cmd_success;
- usb_buf_id = 0;
- count = kbytes * (1024/AO_USB_IN_SIZE);
-
- ao_crc_reset();
-
- ao_led_on(AO_LED_GREEN);
- while (count--) {
- buf = buffer[usb_buf_id];
-// printf ("before get: head %3d tail %3d running %d\n", ao_adc_ring_head, ao_adc_ring_tail, ao_adc_running); flush();
- rnd = (uint32_t *) ao_adc_get(AO_USB_IN_SIZE); /* one 16-bit value per output byte */
-// printf ("after get: head %3d tail %3d running %d\n", ao_adc_ring_head, ao_adc_ring_tail, ao_adc_running); flush();
- for (i = 0; i < 32; i++)
- *buf++ = ao_crc_in_32_out_16(*rnd++);
- ao_adc_ack(AO_USB_IN_SIZE);
-// printf ("after ack: head %3d tail %3d running %d\n", ao_adc_ring_head, ao_adc_ring_tail, ao_adc_running); flush();
- ao_led_toggle(AO_LED_GREEN|AO_LED_RED);
- ao_usb_write(buffer[usb_buf_id], AO_USB_IN_SIZE);
- ao_led_toggle(AO_LED_GREEN|AO_LED_RED);
- usb_buf_id = 1-usb_buf_id;
- }
- ao_led_off(AO_LED_GREEN|AO_LED_RED);
- flush();
-}
-
-static const struct ao_cmds usbtrng_cmds[] = {
- { ao_trng_fetch, "f <kbytes>\0Fetch a block of numbers" },
- { 0, NULL },
-};
-
-void main(void)
-{
- ao_led_init(LEDS_AVAILABLE);
- ao_led_on(AO_LED_RED);
- ao_clock_init();
- ao_task_init();
- ao_timer_init();
- ao_dma_init();
- ao_adc_init();
- ao_crc_init();
-
- ao_cmd_init();
-
- ao_usb_init();
-
- ao_cmd_register(usbtrng_cmds);
- ao_led_off(AO_LED_RED);
-
- ao_start_scheduler();
-}