feat(ota): Boot支持外部Flash暂存搬运(BL_STASH_TO_B状态)

- bsp.c/h: 外部SPI Flash只读驱动(SPI1, 与App同总线Mode3)
- main.c/h: BL_STASH_TO_B状态: AppSize门禁 -> 外部Flash逐8KB搬运B区 -> CRC校验 -> 进BL_COPY_TO_A复用现有搬运链
- 搬运幂等: 搬运中断电重启后B区仍有效自动重搬

source/User/Inc/bsp.h

@@ -206,7 +206,27 @@ typedef enum {
 #define APP_B_ADDRESS								(APP_A_ADDRESS + APP_BANK_SIZE)  //0x42000 B区: 升级暂存
 #define APP_ADDRESS										APP_A_ADDRESS  //兼容旧名, 指向A区
 #define BOOT_PARA_ADDRESS						(APP_B_ADDRESS + APP_BANK_SIZE)  //0x7C000
-#define BOOT_PARA_SIZE									(FLASH_SECTOR_SIZE)
+#define	BOOT_PARA_SIZE									(FLASH_SECTOR_SIZE)
+
+/*外部SPI Flash(与App共用SPI1: PC0-NSS/PC1-MISO/PC2-SCK/PC3-MOSI, Mode3) - Cat1远程升级固件暂存区*/
+#define	EXTFLASH_NSS_PORT								(PortC)
+#define	EXTFLASH_NSS_PIN								(Pin00)
+#define	EXTFLASH_NSS_SET()								PORT_SetBits(EXTFLASH_NSS_PORT, EXTFLASH_NSS_PIN)
+#define	EXTFLASH_NSS_CLR()								PORT_ResetBits(EXTFLASH_NSS_PORT, EXTFLASH_NSS_PIN)
+#define	EXTFLASH_SCK_PORT								(PortC)
+#define	EXTFLASH_SCK_PIN								(Pin02)
+#define	EXTFLASH_SCK_FUNC								(Func_Spi1_Sck)
+#define	EXTFLASH_MOSI_PORT								(PortC)
+#define	EXTFLASH_MOSI_PIN								(Pin03)
+#define	EXTFLASH_MOSI_FUNC							(Func_Spi1_Mosi)
+#define	EXTFLASH_MISO_PORT								(PortC)
+#define	EXTFLASH_MISO_PIN								(Pin01)
+#define	EXTFLASH_MISO_FUNC							(Func_Spi1_Miso)
+#define	EXTFLASH_UNIT									(M4_SPI1)
+#define	EXTFLASH_UNIT_CLOCK							(PWC_FCG1_PERIPH_SPI1)
+#define	EXTFLASH_CMD_READ								0x03
+#define	SPIFLASH_SECTORSIZE								4096ul
+#define	FLASH_FW_STASH_SECTOR							4038			//暂存区起始扇区(与App spiflash.h一致)
 
 #define	DEBUG															1
 #define	USE_SD_CARD												0
@@ -307,6 +327,8 @@ void Error_Handler(void);
 
 /*Flash操作*/
 void FlashWrite(uint32_t Addr, uint32_t *wData, int wLen);
+void ExtFlashInit(void);
+void ExtFlashRead(uint32_t Addr, uint8_t *rData, uint16_t rLen);
 void ReadBootPara(BootPara rData);
 void WriteBootPara(BootPara wData);
 void EraseFlash(uint32_t BaseAddr, uint32_t SectorCnt);