Simple counter class, non-volatile between resets and power on/off.
Simple Counter class, used to store count array in non-volatile flash memory between resets and power on/off.
Counter.cpp
- Committer:
- kpan
- Date:
- 2018-11-12
- Revision:
- 0:693f2f97c8c1
- Child:
- 1:e8eeddee2959
File content as of revision 0:693f2f97c8c1:
#include "Counter.h" #ifdef COUNTER_DEBUG Serial debug_out(USBTX, USBRX); #endif Counter::Counter() { is_written = flash_size() - SECTOR_SIZE; address = (int)((int*)(flash_size() - SECTOR_SIZE) + 1); #ifdef COUNTER_DEBUG debug_out.printf("Constructing Object...\r\n"); #endif for(int i=0; i<PARTY_LIMIT; i++) vc[i] = 0; this->init(); } #ifdef COUNTER_DEBUG void Counter::print_memory() { int *ptr = (int*) address; debug_out.printf("PartyID\tVoteCt\tMemCt\tAddress\r\n"); for(int i=0; i<PARTY_LIMIT; i++) { debug_out.printf("%dID\t%d\t%d\t%p\r\n", i, vc[i], ptr[i], (ptr+i)); } } #endif void Counter::init() { #ifdef COUNTER_DEBUG debug_out.printf("Initializing...\r\n"); #endif if(*((int*)is_written) == -1) { // then we know it hasn't been initialized yet erase_sector(is_written); int zero = 0; program_flash(is_written, (char*)&zero, sizeof(int)); write_vc(); } else { read_vc(); } #ifdef COUNTER_DEBUG print_memory(); #endif } void Counter::write_vc() { #ifdef COUNTER_DEBUG debug_out.printf("Writing to Flash\r\n"); #endif erase_sector(address); int zero = 0; program_flash(is_written, (char*)&zero, sizeof(int)); program_flash(address, (char*)&vc, sizeof(int) * PARTY_LIMIT); #ifdef COUNTER_DEBUG print_memory(); #endif } void Counter::read_vc() { #ifdef COUNTER_DEBUG debug_out.printf("Reading from Flash\r\n"); #endif for(int i=0; i<PARTY_LIMIT; i++) { vc[i] = *((int*)address+i); } } void Counter::increment(int party_id) { #ifdef COUNTER_DEBUG debug_out.printf("Incrementing %d\r\n", party_id); #endif vc[party_id]++; write_vc(); }