android系統(tǒng)觸摸屏虛擬按鍵(編輯修改稿)
2024-09-12 23:14 本頁面
【文章內(nèi)容簡介】 0。120. /*turny+off,xon。we39。lluseformula1*/121. tcz1=tsc2007_xfer(tsc,READ_Z1)。122. tcz2=tsc2007_xfer(tsc,READ_Z2)。123. //printk(x=%d,y=%d\n,tcx,tcy)。124. /*PreparefornexttouchreadingpowerdownADC,enablePENIRQ*/125. tsc2007_xfer(tsc,PWRDOWN)。126. }127. 128. staticu32tsc2007_calculate_pressure(structtsc2007*tsc,structts_event*tc)129. {130. u32rt=0。131. 132. /*rangefiltering*/133. if(tcx==MAX_12BIT)134. tcx=0。135. 136. if(likely(tcxamp。amp。tcz1)){137. /*putetouchpressureresistanceusingequation1*/138. rt=tcz2tcz1。139. rt*=tcx。140. rt*=tscx_plate_ohms。141. rt/=tcz1。142. rt=(rt+2047)12。143. }144. 145. returnrt。146. }147. 148. staticvoidtsc2007_send_up_event(structtsc2007*tsc)149. {150. structinput_dev*input=tscinput。151. 152. dev_dbg(amp。tscclientdev,UP\n)。153. if(backkeydown==1)154. {155. backkeydown=0。156. input_event(input,EV_KEY,KEY_BACK,0)。157. //printk(backkeyup\n)。158. }159. if(homekeydown==1)160. {161. homekeydown=0。162. input_event(input,EV_KEY,KEY_HOME,0)。163. //printk(homekeyup\n)。164. }165. if(menukeydown==1)166. {167. menukeydown=0。168. input_event(input,EV_KEY,KEY_MENU,0)。169. //printk(menukeyup\n)。170. }171. input_report_key(input,BTN_TOUCH,0)。172. input_report_abs(input,ABS_PRESSURE,0)。173. input_sync(input)。174. }175. 176. staticvoidtsc2007_work(structwork_struct*work)177. {178. structtsc2007*ts=179. container_of(to_delayed_work(work),structtsc2007,work)。180. structts_eventtc。181. u32rt。182. 183. /*184. *NOTE:Wecan39。trelyonthepressuretodeterminethependown185. *state,eventhoughthiscontrollerhasapressuresensor.186. *Thepressurevaluecanfluctuateforquiteawhileafter187. *liftingthepenandinsomecasesmaynotevensettleatthe188. *expectedvalue.189. *190. *Theonlysafewaytocheckforthepenupconditionisinthe191. *workfunctionbyreadingthepensignalstate(it39。saGPIO192. *andIRQ).Unfortunatelysuchcallbackisnotalwaysavailable,193. *inthatcasewehaverelyonthepressureanyway.194. */195. if(tsget_pendown_state){196. if(unlikely(!tsget_pendown_state())){197. tsc2007_send_up_event(ts)。198. tspendown=false。199. gotoout。200. }201. 202. dev_dbg(amp。tsclientdev,penisstilldown\n)。203. }204. 205. tsc2007_read_values(ts,amp。tc)。206. 207. rt=tsc2007_calculate_pressure(ts,amp。tc)。208. if(rtMAX_12BIT){209. /*210. *Samplefoundinconsistentbydebouncingorpressureis211. *beyondthemaximum.Don39。treportittouserspace,212. *repeatatleastoncemorethemeasurement.213. */214. dev_dbg(amp。tsclientdev,ignoredpressure%d\n,rt)。215. gotoout。216. 217. }218. 219. if(rt){220. structinput_dev*input=tsinput。221. if((=81)amp。amp。(=181))222. {223. if((=2711)amp。amp。(=2832))224. {225. if(backkeydown==0)226. {227. input_event(input,EV_KEY,KEY_BACK,1)。228. backkeydown=1。229. //printk(backkeydown\n)。230. }231. }232. elseif((=1891)amp。amp。(=1933))233. {234. if(homekeydown==0)235. {236. input_event(input,EV_KEY,KEY_HOME,1)。237.
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