Download Functions
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## Download Functions

Download function write applets, parameters and runtime firmware to device SDRAM or NVRAM.

### WriteExecuteApplet

`signed WriteExecuteApplet(` | plc, |
| header`)`; |

`struct plc * plc`;
`void const * header`;

Write an NVM image directly into SDRAM using `VS_WRITE_AND_EXECUTE` messages. This function calls either WriteExecuteApplet1 or WriteExecuteApplet2 based on the NVM header version. The function is declared in plc.h and defined in WriteExecuteApplet.c. The `plc` structure is defined in plc.h.

### WriteExecuteApplet1

`signed WriteExecuteApplet1(` | plc, |
| header`)`; |

`struct plc * plc`;
`struct nvm_header1 * header`;

Write an NVM image directly into SDRAM using `VS_WRITE_AND_EXECUTE` messages. This function is similar to WriteExecuteApplet2 but expects a structure `nvm_header1` pointer instead of a structure `nvm_header2` pointer. The function is declared in plc.h and defined in WriteExecuteApplet.c. Structure `plc` is defined in file plc.h. Structure `nvm_header1` is defined in file nvm.h.

### WriteExecuteApplet2

`signed WriteExecuteApplet2(` | plc, |
| header`)`; |

`struct plc * plc`;
`struct nvm_header2 * header`;

Write an NVM image directly into SDRAM using `VS_WRITE_AND_EXECUTE` messages. This function is similar to WriteExecuteApplet1 but expects a structure `nvm_header2` pointer instead of a structure `nvm_header1` pointer. The function is declared in plc.h and defined in WriteExecuteApplet.c. Structure `plc` is defined in file plc.h. Structure `nvm_header1` is defined in file nvm.h.

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