Tm4c nested uart interrupts- does each com finishes it's run before the next one executed? -

-

board: tiva™ c series tm4c1294

ek-tm4c1294xl

my program listening 2 uarts ports(uart  3 , 7)

i encounter of problem im loosing bytes received , im suspecting issue relate uarts interrupts.

i understand uarts have nested interrupts both of them serial?

for example: im inside uart 3 interrupt function , while uart 3 didnt finish interrupt(just copy bytes buffer) uart 7 interrupts arrives, system moves uart 7 or first finish uart 3 , moves uart 7?

currently im suffering error bytes 45-400 bytes file size in 12 mbytes

im suspecting above issue cause issues

p.s if 1 uart sending data have binary same files on both host , pc 

thanks 

idan

depends on interrupt priorities of uartx. uart3 relinquish control uart7 if uart7 priority higher. fact single uart works in copying file on target & pc, fails 45+ bytes in 12mb file when 2 uarts in operation, need excerpts of code implementation analyze. in case copying same single pc-file through 2 different uarts, file locking mechanism needs taken care of or can try 2 duplicate copies of files on pc each uart isolate issue


Comments

Post a Comment

Popular posts from this blog

Fail to load namespace Spring Security http://www.springframework.org/security/tags -

-
i have problem namespace of spring security on xhtml page. don't understand why can't load uri, , have following issue: whitelabel error page application has no explicit mapping /error, seeing fallback. tue jul 21 16:58:12 utc 2015 there unexpected error (type=not found, status=404). please need help! possible uri has been changed? best regards you using incorrect namespace url. correct url http://www.springframework.org/schema/security the error page seeing spring source website since not recognize url. try visiting http://www.springsource.org/security/tags in browser update : spring security tags used in jsp page correct tag lib declaration is: <%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags" %>
Read more

sql - MySQL query optimization using coalesce -

-
can explain me why second query faster first? (first 1 takes around 40 seconds, second 1 less 0.1) select releases.feature_code, releases.platform_id, version, release_date, general_available, uri, filesize, display_name, feature_name.full_name, if ((select exists(select 1 release_exceptions releases.feature_code = release_exceptions.feature_code , releases.platform_id = release_exceptions.platform_id , releases.version = release_exceptions.version) = 1), 1, 0) release_exceptions releases left outer join platform using(platform_id) left outer join feature_name using(feature_code) order version desc; ~~~ query 2 ------------------ ~~~ select feature_code, version, release_date, general_available, platform_id, uri, filesize, display_name, feature_name.full_name, coalesce(release_exceptions, 0) release_exceptions mus.releases left outer join ( select distinct feature_code, version, platform_id, 1 release_exceptions mus.release_exceptions ) release_exceptions using ...
Read more

unity3d - Unity local avoidance in user created world -

-
i'm using unity3d networked multiplayer online game have large complex 3d terrain scene forest, trees, cliff, hills, mountains, bounders, etc. players can build structures sort of minecraft, , put them anywhere in scene, or move them around anytime. aside human controlled players, there automated ai players , objects animals roaming around scene following path. the problem how make these automated ai players , animals, able navigate around static , dynamic player created structures, because path follow can blocked player created structures, or other players , other ai objects, cliffs etc. have find away around them or on track if tumble down off high cliff example. so made navmesh , used navagents, takes care of static, non moving objects, how make ai players navigate around each other , dynamic structures created players can number in hundreds? i thought of adding navmeshobstacle everything, result in being attached hundreds of objects since user created structures b...
Read more