rtt 2.1.0 正式版 mdk4 bsp/stm32 编译canapp.c错误

struct rt_can_filter_config filter1 =
{
    .count = 4,
    .actived = 1,
    .items = filter1item,
};
struct rt_can_filter_config filter2 =
{
    .count = 4,
    .actived = 1,
    .items = filter2item,
};
static struct can_app_struct can_data[2] =
{
    {
        .name = "bxcan1",
        .filter = &filter1,
        .eventopt = RT_EVENT_FLAG_OR | RT_EVENT_FLAG_CLEAR,
    },
    {
        .name = "bxcan2",
        .filter = &filter2,
        .eventopt = RT_EVENT_FLAG_AND | RT_EVENT_FLAG_CLEAR,
    },
};

applications/canapp.c(156): error:  #29: expected an expression
      .count = 4,

rt_pin_write(led->rtd.pin, 0);

.uild
tthread-stm32.axf: Error: L6218E: Undefined symbol rt_pin_write (referred from canapp.o).

file ‘pin.c’ is already a member of group ‘applications’ type c source file
file will not be added