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atusb/fw/: added transition from runtime to DFU mode according to DFU spec

Browse Source 
- descr.c (config_descriptor): added DFU interface descriptor
- ep0.c (my_dfu_setup, my_set_interface, ep0_init): added DFU
  interface switching
- ep0.c (my_reset, ep0_init): CPU-reset (into boot loader) on
  USB bus reset when in appDETACH
- Makefile (OBJS): added dfu_common.o
This commit is contained in:
Werner Almesberger 2011-06-10 23:26:36 -03:00
parent 5f50611735
commit 2d7ee91430
3 changed files with 47 additions and 3 deletions
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3
atusb/fw/Makefile
View File

@ -31,7 +31,8 @@ SIZE = $(AVR_PREFIX)size
USB_ID = 20b7:1540
USB_OBJS = usb.o atu2.o
OBJS = atusb.o board.o board_app.o sernum.o spi.o descr.o ep0.o $(USB_OBJS)
OBJS = atusb.o board.o board_app.o sernum.o spi.o descr.o ep0.o dfu_common.o \
$(USB_OBJS)
BOOT_OBJS = boot.o board.o sernum.o spi.o flash.o dfu.o dfu_common.o \
$(USB_OBJS)

9
atusb/fw/descr.c
View File

@ -12,6 +12,7 @@
#include "usb.h"
#include "dfu.h"
#include "board.h"
@ -55,9 +56,9 @@ const uint8_t config_descriptor[] = {
#if 0
LE(9+9+7+7), /* wTotalLength */
#else
LE(9+9), /* wTotalLength */
LE(9+9+9), /* wTotalLength */
#endif
1, /* bNumInterfaces */
2, /* bNumInterfaces */
1, /* bConfigurationValue (> 0 !) */
0, /* iConfiguration */
USB_ATTR_BUS_POWERED, /* bmAttributes */
@ -98,4 +99,8 @@ const uint8_t config_descriptor[] = {
LE(EP1_SIZE), /* wMaxPacketSize */
0, /* bInterval */
#endif
/* Interface #1 */
DFU_ITF_DESCR(1, dfu_proto_runtime)
};

38
atusb/fw/ep0.c
View File

@ -21,11 +21,13 @@
#endif
#include "usb.h"
#include "dfu.h"
#include "at86rf230.h"
#include "atusb/ep0.h"
#include "version.h"
#include "board.h"
#include "sernum.h"
#include "spi.h"
@ -207,7 +209,43 @@ static int my_setup(const struct setup_request *setup)
}
static int my_dfu_setup(const struct setup_request *setup)
{
switch (setup->bmRequestType | setup->bRequest << 8) {
case DFU_TO_DEV(DFU_DETACH):
/* @@@ should use wTimeout */
dfu.state = appDETACH;
return 1;
default:
return dfu_setup_common(setup);
}
}
static void my_set_interface(int nth)
{
if (nth) {
user_setup = my_dfu_setup;
user_get_descriptor = dfu_my_descr;
dfu.state = appIDLE;
} else {
user_setup = my_setup;
user_get_descriptor = sernum_get_descr;
}
}
static void my_reset(void)
{
if (dfu.state == appDETACH)
reset_cpu();
}
void ep0_init(void)
{
user_setup = my_setup;
user_set_interface = my_set_interface;
my_set_interface(0);
user_reset = my_reset;
}