Change  _NTO_TCTL_IO to  _NTO_TCTL_IO_PRIV.

--Elad
________________________________________
From: Todd Peterson(deleted) [community-noreply@qnx.com]
Sent: September-15-18 9:57 PM
To: ostech-core_os
Subject: Pin mux UARTs Beaglebone Black

I am running QNX 6.6 and trying to set the UART pin modes. The register values do not get changed. I don't recall having
 this problem under QNX 6.5. Here is my code, any clues?

int main(int argc, char *argv[]) {
        uintptr_t vaddr;
        if (ThreadCtl( _NTO_TCTL_IO, 0 )) {
        printf("must be root\n");
        return 1;
    }
        setvbuf (stdout, NULL, _IOLBF, 0);
        // muxing
        vaddr = mmap_device_io(0x1000, 0x44e10000);
        out32(vaddr + 0x950, 0x31);
        out32(vaddr + 0x954, 0x1);
        out32(vaddr + 0x980, 0x30);
        out32(vaddr + 0x984, 0x0);
        printf("0x%x\n", in32(vaddr + 0x950));
        printf("0x%x\n", in32(vaddr + 0x954));
        munmap_device_io( vaddr, 0x1000);

        return EXIT_SUCCESS;
}




_______________________________________________

OSTech
http://community.qnx.com/sf/go/post119107
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<font face="Default Sans Serif,Verdana,Arial,Helvetica,sans-serif" size="2"><div>Bingo!</div><div>Thanks!</div><div><br>
Todd Peterson<br>Chief Embedded Systems Engineer<br>Management Sciences, Inc.<br>6022 Constitution Ave NE<br>Albuquerque
, NM 87110<br>505-255-8611 (office)<br>505-205-7057 (cell)</div><br><br><font color="#990099">-----Elad Lahav <community
-noreply@qnx.com> wrote: -----</font><div class="iNotesHistory" style="padding-left:5px;"><div style="padding-right:0px;
padding-left:5px;border-left:solid black 2px;">To: "ostech-core_os@community.qnx.com" <ostech-core_os@community.qnx.com>
<br>From: Elad Lahav <community-noreply@qnx.com><br>Date: 09/16/2018 05:16PM<br>Subject: RE: Pin mux UARTs Beaglebone 
Black<br><br><div><font face="Courier New,Courier,monospace" size="3">Change  _NTO_TCTL_IO to  _NTO_TCTL_IO_PRIV.<br><br
>--Elad<br>________________________________________<br>From: Todd Peterson(deleted) [community-noreply@qnx.com]<br>Sent:
 September-15-18 9:57 PM<br>To: ostech-core_os<br>Subject: Pin mux UARTs Beaglebone Black<br><br>I am running QNX 6.6 
and trying to set the UART pin modes. The register values do not get changed. I don't recall having this problem under 
QNX 6.5. Here is my code, any clues?<br><br>int main(int argc, char *argv[]) {<br>        uintptr_t vaddr;<br>        if
 (ThreadCtl( _NTO_TCTL_IO, 0 )) {<br>        printf("must be root\n");<br>        return 1;<br>    }<br>        setvbuf 
(stdout, NULL, _IOLBF, 0);<br>        // muxing<br>        vaddr = mmap_device_io(0x1000, 0x44e10000);<br>        
out32(vaddr + 0x950, 0x31);<br>        out32(vaddr + 0x954, 0x1);<br>        out32(vaddr + 0x980, 0x30);<br>        
out32(vaddr + 0x984, 0x0);<br>        printf("0x%x\n", in32(vaddr + 0x950));<br>        printf("0x%x\n", in32(vaddr + 
0x954));<br>        munmap_device_io( vaddr, 0x1000);<br><br>        return EXIT_SUCCESS;<br>}<br><br><br><br><br>
_______________________________________________<br><br>OSTech<br><a href="http://community.qnx.com/sf/go/post119107">
http://community.qnx.com/sf/go/post119107</a><br>To cancel your subscription to this discussion, please e-mail ostech-
core_os-unsubscribe@community.qnx.com<br><br><br><br><br>_______________________________________________<br><br>OSTech<
br><a href="http://community.qnx.com/sf/go/post119110">http://community.qnx.com/sf/go/post119110</a><br>To cancel your 
subscription to this discussion, please e-mail ostech-core_os-unsubscribe@community.qnx.com<br></font></div></div></div>
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<font face="Default Sans Serif,Verdana,Arial,Helvetica,sans-serif" size="2"><div>I am not sure what happens in 6.5 if I 
don't use that call. I see from the QNX documentation that the _PRIV variant was added in 6.6. I wouldn't want a non-
privileged user program to change pin muxes or mess with many other machine-level registers.</div><div><br>Todd Peterson
<br>Chief Embedded Systems Engineer<br>Management Sciences, Inc.<br>6022 Constitution Ave NE<br>Albuquerque, NM 87110<br
>505-255-8611 (office)<br>505-205-7057 (cell)</div><br><br><font color="#990099">-----Elad Lahav <community-noreply@qnx.
com> wrote: -----</font><div class="iNotesHistory" style="padding-left:5px;"><div style="padding-right:0px;padding-left:
5px;border-left:solid black 2px;">To: "ostech-core_os@community.qnx.com" <ostech-core_os@community.qnx.com><br>From: 
Elad Lahav <community-noreply@qnx.com><br>Date: 09/17/2018 04:55AM<br>Subject: RE: Pin mux UARTs Beaglebone Black<br><br
><div><font face="Courier New,Courier,monospace" size="3">That said, why do you need to be in SYS mode to access memory-
mapped registers? What happens on 6.5 when you don't use _NTO_TCTL_IO?<br><br>--Elad<br>
________________________________________<br>From: Elad Lahav<br>Sent: September-16-18 7:16 PM<br>To: ostech-core_os@
community.qnx.com<br>Subject: RE: Pin mux UARTs Beaglebone Black<br><br>Change  _NTO_TCTL_IO to  _NTO_TCTL_IO_PRIV.<br><
br>--Elad<br>________________________________________<br>From: Todd Peterson(deleted) [community-noreply@qnx.com]<br>
Sent: September-15-18 9:57 PM<br>To: ostech-core_os<br>Subject: Pin mux UARTs Beaglebone Black<br><br>I am running QNX 6
.6 and trying to set the UART pin modes. The register values do not get changed. I don't recall having this problem 
under QNX 6.5. Here is my code, any clues?<br><br>int main(int argc, char *argv[]) {<br>        uintptr_t vaddr;<br>    
    if (ThreadCtl( _NTO_TCTL_IO, 0 )) {<br>        printf("must be root\n");<br>        return 1;<br>    }<br>        
setvbuf (stdout, NULL, _IOLBF, 0);<br>        // muxing<br>        vaddr = mmap_device_io(0x1000, 0x44e10000);<br>      
  out32(vaddr + 0x950, 0x31);<br>        out32(vaddr + 0x954, 0x1);<br>        out32(vaddr + 0x980, 0x30);<br>        
out32(vaddr + 0x984, 0x0);<br>        printf("0x%x\n", in32(vaddr + 0x950));<br>        printf("0x%x\n", in32(vaddr + 
0x954));<br>        munmap_device_io( vaddr, 0x1000);<br><br>        return EXIT_SUCCESS;<br>}<br><br><br><br><br>
_______________________________________________<br><br>OSTech<br><a href="http://community.qnx.com/sf/go/post119107">
http://community.qnx.com/sf/go/post119107</a><br>To cancel your subscription to this discussion, please e-mail ostech-
core_os-unsubscribe@community.qnx.com<br><br><br><br><br>_______________________________________________<br><br>OSTech<
br><a href="http://community.qnx.com/sf/go/post119112">http://community.qnx.com/sf/go/post119112</a><br>To cancel your 
subscription to this discussion, please e-mail...