Vinicius and Gehard, thank you very much for your help! I'm able to communicate (through shared memory) PRU0 and host (Linux) side. It worked really well!
Em seg, 18 de jan de 2021 12:47, Vinicius Juvinski < [email protected]> escreveu: > Hi Pedro, > > Yes > > Sent from my iPhone > > > Em 18 de jan. de 2021, à(s) 12:06, Pedro Henrique Fonseca Bertoleti < > [email protected]> escreveu: > > > Vinicius, have you meant 0x4A300000 + 0x1000 as the frist shared mem > address to be used? > > Em seg, 18 de jan de 2021 11:50, Vinicius Juvinski < > [email protected]> escreveu: > >> One detail, >> >> If I not wrong, the first 100 bytes of the dram is used by pru for some >> configs, register and other stuffs I don't remember right now, so you >> should use BASE Address +1000 at least >> >> >> >> https://www.ti.com/lit/ug/spruh73q/spruh73q.pdf?ts=1610923856664 - >> section 4.3 details the memory usage from PRU. >> >> >> >> >> Em seg., 18 de jan. de 2021 às 10:14, Gerhard Hoffmann < >> [email protected]> escreveu: >> >>> Hi, >>> >>> just for the mapping, you won't need most of the include files. >>> >>> I often include xyz.h in xyz.c so that I get at least a warning when I >>> change >>> >>> sth. so that the public promises in .h no longer hold. >>> >>> pru_if.h is in the post but not needed. >>> >>> Remove the includes and the compiler will tell you what is missing. >>> >>> You definitely don't need ltcsrv.h and the stuff for nice(). >>> >>> >>> - A file descriptor must be used for /dev/mem: >>> >>> >>> int dev_mem_fd; >>> dev_mem_fd = open("/dev/mem",O_RDWR | O_SYNC); >>> >>> >>> - Shared RAM is mapped (prepared for use) by this line: >>> >>> >>> shared_ram = (int *) mmap(NULL, 12*1024, PROT_READ | PROT_WRITE, >>> MAP_SHARED, dev_mem_fd, 0x4A300000 + 0x10000); >>> >>> >>> - Here follows examples of usage (in this case, writing to shared >>> ram memory): >>> >>> >>> shared_ram[0] = ... ; //write to 0x4A310000 >>> shared_ram[1] = ... ; //write to 0x4A310004 >>> shared_ram[1] = ... ; //write to 0x4A310008 >>> >>> ^!! >>> >>> >>> Am I right? >>> >>> Yes. >>> >>> I should have snipped a lot of text, but was only half awake. >>> >>> Cheers, Gerhard >>> >>> >>> >>> -- >>> For more options, visit http://beagleboard.org/discuss >>> --- >>> You received this message because you are subscribed to the Google >>> Groups "BeagleBoard" group. >>> To unsubscribe from this group and stop receiving emails from it, send >>> an email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/beagleboard/32141ab3-a346-b184-90bc-5c9bc810d169%40hoffmann-hochfrequenz.de >>> <https://groups.google.com/d/msgid/beagleboard/32141ab3-a346-b184-90bc-5c9bc810d169%40hoffmann-hochfrequenz.de?utm_medium=email&utm_source=footer> >>> . >>> >> -- >> For more options, visit http://beagleboard.org/discuss >> --- >> You received this message because you are subscribed to the Google Groups >> "BeagleBoard" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/beagleboard/CAB6xwCr%3DA6UKZ0z8SJQyNPRxCdb0%3DPvBfQx_%3DA-g86j4gqj%2BQA%40mail.gmail.com >> <https://groups.google.com/d/msgid/beagleboard/CAB6xwCr%3DA6UKZ0z8SJQyNPRxCdb0%3DPvBfQx_%3DA-g86j4gqj%2BQA%40mail.gmail.com?utm_medium=email&utm_source=footer> >> . >> > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/CAJK9pqedmY%2B75GshLrqT02%3DLFQMTPNR202B3Q7%2BY0WPido%3Dujg%40mail.gmail.com > <https://groups.google.com/d/msgid/beagleboard/CAJK9pqedmY%2B75GshLrqT02%3DLFQMTPNR202B3Q7%2BY0WPido%3Dujg%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/3D583BDE-10DB-4106-A60B-54C3D8FAC3A8%40gmail.com > <https://groups.google.com/d/msgid/beagleboard/3D583BDE-10DB-4106-A60B-54C3D8FAC3A8%40gmail.com?utm_medium=email&utm_source=footer> > . > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CAJK9pqewB0pzx8H%2B%2B1s-BoJwmYzNUy8eFiFr6Sv28_W4T%3DhCYw%40mail.gmail.com.
