:::
Browsing this Thread:
1 Anonymous Users
|
Re: 請教C30優化的問題
|
||||
|---|---|---|---|---|
|
版主
 
|
要比較其差異性，建議在 view 下打開 Listing 檔案比較一下就知道了。
發表於: 2009/9/28 11:43
|
|||
|
||||
|
Re: 請教C30優化的問題
|
||||
|---|---|---|---|---|
|
資深會員
 
|
timing 控制不可假 compiler 之手，這是常識之一。
完畢。
發表於: 2009/9/26 11:24
|
|||
|
The Answer to Life, the Universe, and Everything.
|
||||
|
||||
|
請教C30優化的問題
|
||||
|---|---|---|---|---|
|
新會員
|
程序量很大，用了c30的s級優化，版主幫我看看下麵這段代碼哪裡被優化了，因為優化謙和優化后採樣值差了一半
spi_sdi_adc是數據輸出端口 unsigned int ads7822(void) { uint pppp,tttt; uchar i; tttt =0x0800; pppp=0; sclk_adc = 0 ; adc_delay(1); cs_adc = 0 ; adc_delay(1); sclk_adc = 0 ; adc_delay(1); sclk_adc = 1 ; adc_delay(1); sclk_adc = 0 ; adc_delay(1); sclk_adc = 1 ; adc_delay(1); sclk_adc = 0 ; adc_delay(1); sclk_adc = 1 ; for(i=0;i<=11;i++) { sclk_adc = 0 ; asm("nop"); adc_delay(1); if(spi_sdi_adc) { pppp |=tttt; } tttt >>=1; sclk_adc = 1 ; } asm("nop"); cs_adc = 1; return(pppp); }
發表於: 2009/9/26 10:38
|
|||
|
||||
You can view topic.
你 不可以 發起新主題
You cannot reply to posts.
You cannot edit your posts.
You cannot delete your posts.
You cannot add new polls.
You cannot vote in polls.
You cannot attach files to posts.
You cannot post without approval.
You cannot use topic type.
You cannot use HTML syntax.
You cannot use signature.
You cannot create PDF files.
You cannot get print page.
