112 …25qxx_read(struct rt_mtd_nor_device *device, rt_off_t offset, rt_uint8_t *buffer, rt_size_t length)  in w25qxx_read()  argument
117     if((offset + length) > device->block_end * FLASH_BLOCK_SIZE)  in w25qxx_read()
132                           buffer, length);  in w25qxx_read()
135     return length;  in w25qxx_read()
138 …rite(struct rt_mtd_nor_device *device, rt_off_t offset, const rt_uint8_t *buffer, rt_size_t length)  in w25qxx_write()  argument
145     if((offset + length) > device->block_end * FLASH_BLOCK_SIZE)  in w25qxx_write()
157     while(write_total < length)  in w25qxx_write()
168         //address % FLASH_PAGE_SIZE + length  in w25qxx_write()
169         if(((offset & (FLASH_PAGE_SIZE - 1)) + (length - write_total)) > FLASH_PAGE_SIZE)  in w25qxx_write()
175             write_size = (length - write_total);  in w25qxx_write()
193     return length;  in w25qxx_write()
196 … rt_err_t w25qxx_erase_block(struct rt_mtd_nor_device *device, rt_off_t offset, rt_uint32_t length)  in w25qxx_erase_block()  argument
206     if((offset + length) > device->block_end * FLASH_BLOCK_SIZE)  in w25qxx_erase_block()
209     /* check length must align to block size */  in w25qxx_erase_block()
210     if(length %  device->block_size != 0)  in w25qxx_erase_block()
212         rt_kprintf("param length = %d ,error\n",length);  in w25qxx_erase_block()
221     while (erase_size < length)  in w25qxx_erase_block()