Data transmission method and device, electronic equipment and storage medium

The invention provides a data transmission method and device, electronic equipment and a storage medium. The method is applied to a neural network processor, the neural network processor comprises a computing core, a second access controller and a shared storage unit, and the computing core comprises a local storage unit, a first access controller and a processing unit; comprising the steps of determining a target bus protocol; executing first data transmission between the local storage unit and the processing unit through the first access controller based on the target bus protocol; and performing a second data transfer between the shared storage unit and the local storage unit through the second access controller. According to the scheme, the processing unit performs the first data transmission with the local storage units in the calculation cores, the shared storage unit performs the second data transmission, data interaction between the local storage units in the different calculation cores is realized, t