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trezor.msg: fix empty read

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This commit is contained in:
Jan Pochyla 2017-06-27 13:49:35 +02:00
parent 915cf849e9
commit a2a4b285d4
1 changed files with 7 additions and 13 deletions
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16
micropython/extmod/modtrezormsg/modtrezormsg.c
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@ -458,16 +458,6 @@ STATIC const mp_obj_type_t mod_trezormsg_Msg_type = {
.locals_dict = (void*)&mod_trezormsg_Msg_locals_dict,
};
STATIC mp_obj_t read_bytes_from_hid(uint8_t iface) {
uint8_t buf[64];
int l = usb_hid_read(iface, buf, sizeof(buf));
if (l > 0) {
return mp_obj_new_str_of_type(&mp_type_bytes, buf, l);
} else {
return mp_const_empty_bytes;
}
}
#define TOUCH_IFACE (255)
#define POLL_READ (0x0000)
#define POLL_WRITE (0x0100)
@ -507,10 +497,14 @@ STATIC mp_obj_t mod_trezormsg_poll(mp_obj_t ifaces, mp_obj_t list_ref, mp_obj_t
} else
if (mode == POLL_READ) {
if (usb_hid_can_read(iface)) {
uint8_t buf[64];
int l = usb_hid_read(iface, buf, sizeof(buf));
if (l > 0) {
ret->items[0] = MP_OBJ_NEW_SMALL_INT(i);
ret->items[1] = read_bytes_from_hid(iface);
ret->items[1] = mp_obj_new_str_of_type(&mp_type_bytes, buf, l);
return mp_const_true;
}
}
} else
if (mode == POLL_WRITE) {
if (usb_hid_can_write(iface)) {