作者查詢 / dexders
作者 dexders 在 PTT [ ASM ] 看板的留言(推文), 共57則
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22F→:4.99也太便宜了 先買個五片再說10/09 23:10
1F→:我記得我是設定512byte bulk傳輸 不過要再確認一下08/02 00:20
2F→:thanks!08/02 00:20
6F→:我是模擬成composite devices, endpoint 2,4,6,8都用上了08/02 15:26
7F→:virtual comport能用的buffer剩不多08/02 15:26
2F→:現在是開一個128byte的陣列 當收到\n或\r之後全部丟到usb07/29 17:12
3F→:endpoint去傳輸 這邊不用firmware控制 但就是來不及塞...07/29 17:12
5F→:RI進來就塞一次buffer 塞到滿或是符合條件送出 這樣應該好07/29 17:34
6F→:吧? 這困擾我很久了07/29 17:34
7F→:也不能用while(1)來收 會卡住其他東西07/29 17:36
13F→:我虛擬出來的virtual comport大概是10ms掃一次 一次傳1k07/29 18:26
14F→:byte沒問題 fx2lp的USB不需要太多firmware控制07/29 18:28
15F→:現在想到一個問題 MCU是用3.3v target 2.8v 這樣會有關係?07/29 18:28
16F→:重複送同一個字串 有時候很完整 有時候會掉10byte以上....07/29 18:29
21F→:封包(n-1)的stop bit跟封包(n)的start bit只隔了1uS...07/31 23:20
22F→:68013A跟得上嗎?07/31 23:20
25F→:我速度是用57600 UART是採用interrupt方式 現在只要收到一08/01 21:45
26F→:個byte就塞進enpoint buffer裡面然後arm endpoint 漏掉的08/01 21:46
27F→:資料比之前少 但是還是會有遺漏 可能是因為 arm endpoint08/01 21:46
28F→:需要SYNCDELAY吧...... 目前還找不到辦法08/01 21:47
2F→:齒輪?04/21 21:04
7F→:我兩組uart都有在使用 但很神奇的是 我只需要init UART002/10 00:02
8F→:UART1就跟著動作...鮑率都是一樣的02/10 00:03
9F→:而且中斷能關的都關了 只剩UART 還是一樣一直loss資料02/10 00:04
11F→:也就TXD RXD兩隻腳 要接錯應該不怎麼簡單吧我想02/11 11:12
12F→:要是真接錯 也收不到02/11 11:13
16F→:還有DMA跟指令快取...... 不過tune起來真得很累01/20 09:10
3F→:不是焊上去就可以用的....你還要寫對應的程式去讓他運作..12/10 03:38
5F→:8051的io port有這麼快嗎?11/09 15:43
1F推:廢物,垃圾,當機原因+110/21 03:25
4F→:之間會參雜別的記憶體 排起來很麻煩10/13 22:11