赛元单片机触摸按键调节及避坑指南(以SC92F8461B的高灵敏触摸为例)
目錄
- 前言
- 流程總覽
- 步驟說明
- 1.燒錄官方高靈敏hex文件
- 2.目標(biāo)板連接電腦并選擇初始參數(shù)
- 3.參數(shù)調(diào)整
- 4.驗(yàn)證相互間影響
- 5.將配置信添加到工程
- 6.靈活調(diào)整
- 總結(jié)
前言
項(xiàng)目中前前后后用到過好多次帶觸摸按鍵功能的賽元單片機(jī),第一次使用時研究了好久的使用手冊。過了一段時間后,再次使用,便又忘了,寫下這篇文章,方便今后查閱和回顧。
本文以SC92F8461B,靜態(tài)調(diào)試高靈敏觸摸為例。
流程總覽
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.edge-pattern-dashed{stroke-dasharray:3}#mermaid-svg-df4CU48E5dnRhyev .edge-pattern-dotted{stroke-dasharray:2}#mermaid-svg-df4CU48E5dnRhyev .marker{fill:#333}#mermaid-svg-df4CU48E5dnRhyev .marker.cross{stroke:#333}:root { --mermaid-font-family: "trebuchet ms", verdana, arial;}#mermaid-svg-df4CU48E5dnRhyev {color: rgba(0, 0, 0, 0.75);font: ;}1.燒錄官方高靈敏hex文件2.目標(biāo)板連接電腦并選擇初始參數(shù)3.參數(shù)調(diào)整4.驗(yàn)證相互間影響5.將配置信添加到工程6.靈活調(diào)整下面從各個步驟進(jìn)行說明,重點(diǎn)是步驟2、3及步驟6。
步驟說明
1.燒錄官方高靈敏hex文件
向官方或者代理的技術(shù)支持要到靜態(tài)觸摸調(diào)試的hex文件(這個文件官網(wǎng)下載不到),SC92F8x6xB用到的hex文件已上傳至樓主資源,文件截圖如下:
用官方提供的程序燒錄軟件SOC Pro51燒錄至目標(biāo)板,軟件及其界面如下:
燒錄中的選項(xiàng)可參考此界面。
2.目標(biāo)板連接電腦并選擇初始參數(shù)
完成上一步操作之后,最好將燒錄器拔插一次,要不然上位機(jī)軟件可能會檢測不到目標(biāo)板。打開觸控調(diào)節(jié)的上位機(jī)軟件,軟件圖標(biāo)如下:
選擇"高靈敏度觸控":
上位機(jī)初始界面如下:
以SC92F8461B為例,我只會更改紅框中的參數(shù),首先選擇對應(yīng)的型號,抗干擾設(shè)置改為1:12bit,選擇用到的通道,其它參數(shù)保持默認(rèn),就可以點(diǎn)確定了。
等待觸控芯片自適應(yīng)參數(shù),若上位機(jī)提示檢測不到目標(biāo)板,可以按下面的步驟進(jìn)行排查:
避坑指南
①重新拔插目標(biāo)板與燒錄器的連接,重新拔插燒錄器與電腦的連接。
②調(diào)試時用到的TCK和DIO端口是否連接了阻容,如果是,最好拆掉后跳個線再試一下。
tips:以上問題都是我自己曾經(jīng)遇到過的,最后都由上述方案得到了解決。
連接成功后,就可以進(jìn)行參數(shù)調(diào)整了。
3.參數(shù)調(diào)整
目標(biāo)板與電腦連接成功后的界面如上圖所示,紅框框中的按鈕表示要調(diào)整兩個按鍵的參數(shù),點(diǎn)擊第一個按鈕,界面如下:
點(diǎn)擊啟動調(diào)試后,跟隨上位機(jī)指示,完成參數(shù)調(diào)整。
在完成參數(shù)調(diào)整后,若參數(shù)調(diào)整成功,界面如下:
再看下失敗的界面:
失敗的界面下會有很多參數(shù)是紅色的,這表示參數(shù)不在限定條件內(nèi),即參數(shù)調(diào)整失敗。我在調(diào)整時也遇到過幾次這樣的現(xiàn)象,基本上都是硬件問題,經(jīng)驗(yàn)如下:
①檢查板子的CMOD引腳是否復(fù)用外接了負(fù)載,此引腳在激活觸控功能時不能連接負(fù)載,若連接了負(fù)載,斷開負(fù)載再試試。
②觸摸按鍵所接的阻容參數(shù)不合適,這點(diǎn)可詳細(xì)看下文檔,或者問下FAE。
這些數(shù)字是多少不是很重要,只要是參數(shù)調(diào)節(jié)成功后,就可以進(jìn)入下一步操作了。
4.驗(yàn)證相互間影響
點(diǎn)擊上圖中的按鈕,
按照圖片中的提示進(jìn)行操作,當(dāng)按鍵都檢測完后,檢測成功的話會有如下的提示:
我遇到過一次診斷失敗的情況,但是最后排查后發(fā)現(xiàn)并不是目標(biāo)板布線的問題,而是端子處的阻容不匹配,導(dǎo)致提示按鍵之間有影響。
5.將配置信添加到工程
診斷完成后,便可點(diǎn)擊如下按鈕生成.h文件了,默認(rèn)文件名是S_TouchKeyCFG.h,然后將此文件添加至工程即可。
我個人喜歡將此頭文件和官方的lib文件和.c文件放在一個文件夾下,如下圖所示,方便管理。
6.靈活調(diào)整
將此文件添加至工程后,上位機(jī)生成的參數(shù)只是可以確保開發(fā)者能使用按鍵,但是對于EMC實(shí)驗(yàn)等還需要手動微調(diào)。可以在調(diào)節(jié)參數(shù)時使用相應(yīng)規(guī)格的銅柱來輔助調(diào)整,這里沒有什么技巧,就是慢慢試,而且調(diào)整一次就要燒錄一次,然后用銅柱驗(yàn)證。
下面對哪些是開發(fā)者可以自己調(diào)整的參數(shù)進(jìn)行說明:
①標(biāo)號的位置表示是否激活組合按鍵,為0表示不激活組合按鍵,為1表示激活組合按鍵
②標(biāo)號的位置是用于修改靈敏度的,可用于過emc的抗干擾試驗(yàn),兩個字節(jié)組成的16位數(shù)據(jù),此數(shù)據(jù)越大,靈敏度便越低。一般來說都是靈敏度太高才需要我們?nèi)ナ謩诱{(diào)整,我一般是直接修改高字節(jié)的數(shù)據(jù),以上圖為例的話,這個數(shù)據(jù)是未經(jīng)修改的,我一般會把0x00改成0x01或0x02,來燒錄驗(yàn)證。這些只是個人經(jīng)驗(yàn),具體板子需要具體應(yīng)對。
總結(jié)
需要提醒一下,賽元的官方庫會直接輸出一個鍵值信息,應(yīng)該是32位的,這個鍵值是可以直接使用的,當(dāng)然,也可以基于此鍵值繼續(xù)寫一下消抖函數(shù),這個鍵值具體的用法這篇就不介紹了,本文主要目的在于如何成功輸出一個有效的配置頭文件。文中提到的工具都已打包好上傳至我的資源中,包括說明文檔,使用指南和燒錄工具及上位機(jī)軟件,都是賽元官方的,除了庫文件外,官網(wǎng)都可以直接下載。
筆芯,變得更強(qiáng)~
總結(jié)
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