VeniVidiVici
/
nvboard
mirror of https://github.com/NJU-ProjectN/nvboard.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

nvboard: change to count down to compare cnt with 0 

* this can reduce one memory access
This commit is contained in:
Zihao Yu 2024-01-04 21:55:18 +08:00
parent c7bf288ab6
commit aedd663a5e
1 changed files with 7 additions and 6 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

13
src/nvboard.cpp
View File

@ -43,16 +43,17 @@ void nvboard_update() {
if (!(is_uart_idle && *uart_tx_ptr)) uart->check_tx();
static uint64_t last = 0;
static uint32_t cpf = 0; // count per frame
static uint32_t cnt = 0;
cnt ++;
if (cnt > cpf) {
static int cpf = 1; // count per frame
static int cnt = 0;
if ((-- cnt) < 0) {
uint64_t now = get_time();
uint64_t diff = now - last;
cpf = ((uint64_t)cnt * 1000000) / ((uint64_t)diff * FPS); // adjust cpf
int cpf_new = ((uint64_t)cpf * 1000000) / ((uint64_t)diff * FPS); // adjust cpf
cnt += cpf_new - cpf;
cpf = cpf_new;
if (diff > 1000000 / FPS) {
last = now;
cnt = 0;
cnt = cpf;
void read_event();
read_event();