bit manipulation - PIC Bit Masking and Shifting for 4 Bit LCD Control -



bit manipulation - PIC Bit Masking and Shifting for 4 Bit LCD Control -

i have question regarding both masking , bit shifting.

i have next code:

void writelcd(unsigned char word, unsigned commandtype, unsigned usdelay) { // important bits // need bit masking upper nibble, , shift left 8. lcd_d = (lcd & 0x0fff) | (word << 8); enablelcd(commandtype, usdelay); // send info // to the lowest degree important bits // need bit masking lower nibble, , shift left 12. lcd_d = (lcd & 0x0fff) | (word << 12); enablelcd(commandtype, usdelay); // send info }

the "word" 8 bits, , beingness set through 4 bit lcd interface. meaning have break important bits , to the lowest degree important bits apart before send data.

lcd_d 16 bit number, in important bits pass want "do" something. want previous 12 bits preserved in case doing else.

is logic in terms of bit masking , shifting "word" right in terms of passing upper , lower nibbles appropriately lcd_d?

thanks help!

looks ok apart needing cast "word" unsigned short (16 bit) before shift, in both cases, shift not performed on char , looses data. eg:

lcd_d = (lcd & 0x0fff) | ((unsigned short) word << 8);

bit-manipulation pic masking bit-shift lcd

Comments

Post a Comment

Popular posts from this blog

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer -

web services - java.lang.NoClassDefFoundError: Could not initialize class net.sf.cglib.proxy.Enhancer - when trying request rest service @ time of response getting exception.. feb 21, 2013 2:34:49 pm com.sun.jersey.spi.container.containerresponse mapmappablecontainerexception severe: exception contained within mappablecontainerexception not mapped response, re-throwing http container java.lang.noclassdeffounderror: not initialize class net.sf.cglib.proxy.enhancer @ org.hibernate.proxy.pojo.cglib.cgliblazyinitializer.getproxyfactory(cgliblazyinitializer.java:117) @ org.hibernate.proxy.pojo.cglib.cglibproxyfactory.postinstantiate(cglibproxyfactory.java:43) @ org.hibernate.tuple.entity.pojoentitytuplizer.buildproxyfactory(pojoentitytuplizer.java:162) @ org.hibernate.tuple.entity.abstractentitytuplizer.<init>(abstractentitytuplizer.java:135) @ org.hibernate.tuple.entity.pojoentitytuplizer.<init>(pojoentitytuplizer.java:55) @ org.hibernate.tuple.e...
Read more

Accessing MATLAB's unicode strings from C -

Accessing MATLAB's unicode strings from C - how can access underlying unicode info of matlab strings through matlab engine or mex c interfaces? here's example. let's set unicode characters in utf-8 encoded file test.txt, read as fid=fopen('test.txt','r','l','utf-8'); s=fscanf(fid, '%s') in matlab. now if first feature('defaultcharacterset', 'utf-8') , c engevalstring(ep, "s") , output text file utf-8. proves matlab stores unicode internally. if mxarraytostring(enggetvariable(ep, "s")) , unicode2native(s, 'latin-1') give me in matlab: non-latin-1 characters replaced character code 26. need getting access underlying unicode info c string in unicode format (utf-8, utf-16, etc.), , preserving non-latin-1 characters. is possible? my platform os x, matlab r2012b. addendum: documentation explicitly states "[mxarraytostring()] supports multibyte encoded characters...
Read more

javascript - mongodb won't find my schema method in nested container -

javascript - mongodb won't find my schema method in nested container - i trying access method of schema stored within mixed container. here situation : have cases model can many different things, have schema each of these things stored in "casecontent" mixed property. var caseschema = mongoose.schema({ casecontent : {}, object : {type:string, default : "null"}, collision : {type : boolean, default : false} }); the casecontent property filled model of 1 of schemas, 1 exemple : var treeschema = new mongoose.schema({ applecount : {type : number, default : 3} }); treeschema.methods.dostuff = function (data) { console.log('hey, listen'); homecoming true; }; then, want utilize method of schema original container : caseschema.methods.dostuff = function (data) { if (this.casecontent.dostuff !== undefined) { this.casecontent.dostuff(); console.log('it worked'); } else { ...
Read more