1.修改drv_flash_l4.c文件中stm32_onchip_flash定义的blk_size字段,由原来2048改为FLASH_PAGE_SIZE,以增强芯片适应性.
2.修改drv_usbd.c文件中stm_usbd_register函数,增加支持RT_USING_DEVICE_OPS配置.

Signed-off-by: armink <armink.ztl@gmail.com>

增加GPIO中断进入退出保护

Fix comment errors

Signed-off-by: Nxiaofan <xfan1024@live.com>

Signed-off-by: Nxiaofan <xfan1024@live.com>

When compiling C code containing statements like this:
rt_base_t xx_io_tbl[] =
{
   GET_PIN(A,0),
};
the compiler will report:
Warning: #1296-D: extended constant initialiser used

Signed-off-by: Nxiaofan <xfan1024@live.com>

1.增加串口1,7,8配置，经实机测试无误
2.增加PWM4 CH1 -- 4, PWM12(BUZZER)配置，因条件有限，仅测试了TIM12 CH1
3.经测试,CAN通信无法正常使用，原因尚未找出，故暂时删去此配置
测试所用编译器： mdk5, IAR

Signed-off-by: Nxiaofan <xfan1024@live.com>

1. Add phy_linkchange function to simplify eth_phy_isr and phy_monitor_thread_entry
2. phy_speed is uint8_t may case some problems, use enumeration instead of hardware-dependent values
3. Fix eth_phy_isr can not detect link up
4. Use macro to check phy status for flexibility
Signed-off-by: Nxiaofan <xfan1024@live.com>

Rename PHY_INTERRUPT_MSAK_REG to PHY_INTERRUPT_MASK_REG
Signed-off-by: Nxiaofan <xfan1024@live.com>

Signed-off-by: NWillian Chan <chentingwei@rt-thread.com>

2、[bsp] [stm32] fix drv_can assert bug

修复timer_start函数注释：将TIM2改为TIM更合理