The Motor Controller Large Capacity Data Collection Recording System Research

As data storage capacity is more and more large, people have higher demand on the single chip memory capacity.But MCU memory is limited, can't meet the demand of large quantities of data storage .This system to complete the storage of motor running parameters, due to the need for continuous storage motor parameter values, so the data storage capacity is larger .MCU built-in flash memory storage capacity have already can't meet our requirements.In order to be able to long time continuous record of motor parameter, I used the two methods. The first method: Store data in the external Nandflash, through the external Nandflash to expand the data storage capacity. In order to realize the data storage, I choose STM32F103VC as the master chip. This type of MCM has FSMC function, through main control chip FSMC special pin direct connect external Nandflash, so both convenient and expansion of the data storage capacity. Main control chip can by FSMC are read/write, erase operation on external nandflash.The second method: Store data in SD card, main control chip through SPI and SD card communications. The data storage in SD card format is FAT32 File System. For SD operation, I finished the following function: Create directory/file in the root directory; Create multi-layered directory in the root directory; Additional data to the specified file ; To delete the directory/file; The directory/file in accordance with the different requirements list, such as according to the time list.In order to simulate the process of data stored. I with VC+ + 6.0 wrote a PC interface, this interface function is to test. Through CAN make the motor parameters send to the main control chip data buffer. Then go on to perform operations on data in the data buffer.