Struct NVM_request_t

Struct Documentation

struct NVM_request_t

Structure used for AVR_CTLREQ_NVM_REQUEST requests.

These structure are used when :

  • a SPM instruction is executed, or

  • flash memory is read and direct mode is disabled.

These requests are processed by the NVM controller (if it exists) and returned with the result field set. This system allows to implement access control measures and self-programming features.

Public Members

unsigned char kind

Kind of request : 0:write (SPM), 1:read (LPM)

int nvm

Memory block being written/read : -1 if unknown/irrelevant, otherwise one of AVR_NVM enumeration values.

mem_addr_t addr

Address to write/read (in the appropriate block address space)

uint16_t data

Value [to write to/read from] the NVM.

signed char result

Result of the request : >0:success, 0:ignored, <0:error/refused.

unsigned short cycles

Number of cycles to be consumed, only for write (SPM) requests and if result>=0.