--- /dev/null
+/*
+ * Copyright © 2015 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>
+#include <ao_trng.h>
+
+static void
+ao_trng_fetch(void)
+{
+ static uint16_t *buffer[2];
+ uint32_t kbytes = 1;
+ uint32_t count;
+ int usb_buf_id;
+ uint16_t 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_TRNG_READ);
+ while (count--) {
+ rnd = (uint32_t *) ao_adc_get(AO_USB_IN_SIZE); /* one 16-bit value per output byte */
+ buf = buffer[usb_buf_id];
+ for (i = 0; i < AO_USB_IN_SIZE / sizeof (uint16_t); i++)
+ *buf++ = ao_crc_in_32_out_16(*rnd++);
+ ao_adc_ack(AO_USB_IN_SIZE);
+ ao_led_toggle(AO_LED_TRNG_READ|AO_LED_TRNG_WRITE);
+ ao_usb_write(buffer[usb_buf_id], AO_USB_IN_SIZE);
+ ao_led_toggle(AO_LED_TRNG_READ|AO_LED_TRNG_WRITE);
+ usb_buf_id = 1-usb_buf_id;
+ }
+ ao_led_off(AO_LED_TRNG_READ|AO_LED_TRNG_WRITE);
+ flush();
+}
+
+static const struct ao_cmds ao_trng_cmds[] = {
+ { ao_trng_fetch, "f <kbytes>\0Fetch a block of numbers" },
+ { 0, NULL },
+};
+
+void
+ao_trng_init(void)
+{
+ ao_cmd_register(ao_trng_cmds);
+}
--- /dev/null
+/*
+ * Copyright © 2015 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.
+ */
+
+#ifndef _AO_TRNG_H_
+#define _AO_TRNG_H_
+
+void
+ao_trng_init(void);
+
+#endif /* _AO_TRNG_H_ */
ao_pins.h \
ao_product.h \
ao_task.h \
+ ao_adc_fast.h \
stm32f0.h
#
ao_boot_chain.c \
ao_cmd.c \
ao_usb_stm.c \
+ ao_trng.c \
ao_task.c \
ao_product.c
#define AO_CRC_WIDTH 32
#define AO_CRC_INIT 0xffffffff
+/* TRNG */
+#define AO_LED_TRNG_READ AO_LED_RED
+#define AO_LED_TRNG_WRITE AO_LED_GREEN
+
#endif /* _AO_PINS_H_ */
#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 },
-};
+#include <ao_trng.h>
void main(void)
{
ao_usb_init();
- ao_cmd_register(usbtrng_cmds);
+ ao_trng_init();
+
ao_led_off(AO_LED_RED);
ao_start_scheduler();