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by phil95
Tue Mar 07, 2017 4:43 pm
Forum: Bare metal, Assembly language
Topic: OK01 ACT LED + Raspberry Pi 2 Model B
Replies: 7
Views: 1749

Re: OK01 ACT LED + Raspberry Pi 2 Model B

Hello
1/ If you are trying to run that prog under linux, peripherals are protected
you cannot access directly to harrdware.
you can try sudo ./main
Bur what append at the end of the prog ???
2/ That forum is a baremetal forum: Then no linux ...

Phil95
by phil95
Wed Jan 18, 2017 7:41 pm
Forum: Bare metal, Assembly language
Topic: RPI3 cache usb problem
Replies: 8
Views: 1917

Re: RPI3 cache usb problem

Thank you for your answer. in fact my software was running well if I changed every time the DMA buffer. That solution was not suitable. But I have solved that problem changing the DMA buffer address: for RPI 1: adrbuffer = adrbuffer | 0x40000000 for RPI 2 and 3: adrbuffer = adrbuffer | 0xc0000000 Ye...
by phil95
Mon Jan 02, 2017 2:41 pm
Forum: Bare metal, Assembly language
Topic: CSUD - Chadderz's Simple USB Driver (Source)
Replies: 73
Views: 23062

Re: CSUD - Chadderz's Simple USB Driver (Source)

Hello LdB
I'm interested by your use of CSUD:
- wich RPI are you using ? RPI 2/3 ?
- wich version of compiler are you using ?
- Do you have a sample program with your mouse driver ?
Thank's for your answer
Philippe
by phil95
Sat Dec 31, 2016 4:13 pm
Forum: Bare metal, Assembly language
Topic: Changing the Proc Mode
Replies: 7
Views: 2164

Re: Changing the Proc Mode

I wrote that code in 2015 for the RPI 2, and I found
my informations with examples in the web (RPI forum and WEB)
Effectively, the technical documentation is not clear on the subject.
Then a lot of tests ...
Philippe
by phil95
Fri Dec 30, 2016 6:17 pm
Forum: Bare metal, Assembly language
Topic: Changing the Proc Mode
Replies: 7
Views: 2164

Re: Changing the Proc Mode

Hello Sorry, my printf routine is not available. but look at Test1 to understand how it is working... You can call LeaveHypervisor() to go from Hypervisor mode to Supervisor mode Philippe U32 GetCPSR() // ********* { asm("mrs r0,CPSR\n"); } void LeaveHypervisor() // ***************** { asm ( "push {...
by phil95
Mon Dec 26, 2016 8:23 pm
Forum: Bare metal, Assembly language
Topic: RPI3 cache usb problem
Replies: 8
Views: 1917

Re: RPI3 cache usb problem

I have tested with DSB ans DMB but the problem is the same ...
Anyway thank you for your help
Philippe
by phil95
Mon Dec 26, 2016 6:53 pm
Forum: Bare metal, Assembly language
Topic: RPI3 cache usb problem
Replies: 8
Views: 1917

Re: RPI3 cache usb problem

I'm not sure how it is working and documentation is not clear.
I have tried some routines but they are not working.
Philippe
by phil95
Mon Dec 26, 2016 6:23 pm
Forum: Bare metal, Assembly language
Topic: RPI3 cache usb problem
Replies: 8
Views: 1917

Re: RPI3 cache usb problem

Thank's for your answer
I have tried to put that buffer static or in the stack.
I have checked that this buffer is effectively modified, but
the problem seems be a cache problem.
Philippe
by phil95
Mon Dec 26, 2016 2:51 pm
Forum: Bare metal, Assembly language
Topic: RPI3 cache usb problem
Replies: 8
Views: 1917

RPI3 cache usb problem

Hello (all numbers are in hexadecimal) I'm porting to RPI3 my old USB driver that was runing in RPI1. It is working, but I have cache problems. Normally an enumeration is begining with 2 get device parameter: - the first with length of 8 bytes to get the max packet size response 12 01 00 02 09 00 02...
by phil95
Thu Dec 22, 2016 7:57 am
Forum: Bare metal, Assembly language
Topic: Autodetect IO Base Address code
Replies: 3
Views: 1499

Re: Autodetect IO Base Address code

Hello
Another (non destructive) solution:

if (*0x20215010 == 0x61757830) // "aux0"
BaseIoAddress = 0x20000000;
if (*0x3f215010 == 0x61757830) // "aux0"
BaseIoAddress = 0x3f000000;

Philippe
by phil95
Fri Mar 18, 2016 2:58 pm
Forum: Bare metal, Assembly language
Topic: RPI3 baremetal
Replies: 13
Views: 6467

Re: RPI3 baremetal

Hello, I have simplified and adapted software of Vanvught to blink ACT led of PI3 Thanks to Arjan for the reference Philippe org $8000 main: mov sp, #0x8000 bl LedInit Boucle: bl LedOn mov r0, #500 bl Delay bl LedOff mov r0, #500 bl Delay b Boucle align 16 Request: dw 0x1c dw 0 dw 0x00040010 dw 4 dw...
by phil95
Sun Mar 13, 2016 6:10 pm
Forum: Bare metal, Assembly language
Topic: RPI3 baremetal
Replies: 13
Views: 6467

Re: RPI3 baremetal

Thanks for your links, I want to
analyse them ...
Philippe
by phil95
Fri Mar 11, 2016 1:32 pm
Forum: Bare metal, Assembly language
Topic: RPI3 baremetal
Replies: 13
Views: 6467

Re: RPI3 baremetal

Many thanks for that information.
Do you know where I can found the differences between RPI 3 and RPI 2 ?
Philippe
by phil95
Fri Mar 11, 2016 11:28 am
Forum: Bare metal, Assembly language
Topic: RPI3 baremetal
Replies: 13
Views: 6467

RPI3 baremetal

Hello, I'm trying to adapt my baremetal progs to RPI3. - I build a SD card with Jessie of 26/02. The card boot Jessie correctly. - I replace kernel.img and kernel7.img with a small prog to flash red and green leds. - I try that SD on a RPI2 and it is working well. - When I try that SD on RPI3, I hav...
by phil95
Wed Mar 09, 2016 6:14 pm
Forum: Troubleshooting
Topic: 2 RPI3 with 2 SD both not booting
Replies: 29
Views: 7235

Re: 2 RPI3 with 2 SD both not booting

Hello, I have received today my RPI3 from RS. - without SD card, screen black - OK - with SD card Jessie 26 02 16, color mire but no activity on green led - with SD card Jessie 21 11 15, color mire and 4 long flash + 4 short flask These 2 SD cards are working in RPI1 and RPI2 without problem. Alim i...
by phil95
Mon Feb 29, 2016 3:32 pm
Forum: Bare metal, Assembly language
Topic: RPI2 speed
Replies: 17
Views: 3325

Re: RPI2 speed

Thank's for your answer After a lot of tests, I have found: - I'm not in SECURE MONITOR mode but in HYPERVISOR mode And I have not found solution to leave that mode and switch to a more conventionnal mode. - Copy vectors from 0x8000 to 0x0000 is not sufficient; you need program HVBAR to 0 too; when ...
by phil95
Wed Feb 24, 2016 3:34 pm
Forum: Bare metal, Assembly language
Topic: RPI2 speed
Replies: 17
Views: 3325

Re: RPI2 speed

@rst: Thank's for your answer, I have tried arm_control=0x1000 but no change in perf; And the perf difference is not 15 % but more than 600 % After some investigations, I have found: 1/ Proc is in SECURE MONITOR mode. I cannot change that mode using msr CPSR ... That was working in RPI1 2/ I have te...
by phil95
Sat Feb 20, 2016 9:54 am
Forum: Bare metal, Assembly language
Topic: RPI2 speed
Replies: 17
Views: 3325

Re: RPI2 speed

Many thanks for your answers. I have tried with: 0xe1a00000 mov r0, r0 0xeaffffff bra $ + 1 0xe2800001 add r0, #1 And the problem is the same. I think the arm is in SECURE MONITOR mode when starting kernel7.img and it is not possible to alter some P15 registers. - what do you think about it ? - wich...
by phil95
Fri Feb 19, 2016 10:00 am
Forum: Bare metal, Assembly language
Topic: RPI2 speed
Replies: 17
Views: 3325

RPI2 speed

Hello I have worked on RPI 1 and I'm testing RPI 2 today. I wrote a very simple prog to test performance of my boards: an assembly routine build dynamically of 1000 NOPs, and that routine is called 1000 times. Then the test is how long time to execute 1000000 NOPS. Results are: RPI1: 9212 microsec (...
by phil95
Sun Dec 21, 2014 12:40 pm
Forum: C/C++
Topic: serial communication with xbee problem
Replies: 73
Views: 19847

Re: For serial communication

Replace
if(i==65) break;
by
if(i==66) break;
or
if(i>=65) break;
When you exit from i loop, i is 66 ...
Philippe
by phil95
Thu Nov 27, 2014 5:03 pm
Forum: Français
Topic: dongle WIFI TP-link wn823n
Replies: 9
Views: 1939

Re: dongle WIFI TP-link wn823n

Bonjour
Que donne la commande ifconfig ?
Philippe
by phil95
Thu Oct 02, 2014 9:03 am
Forum: Français
Topic: Wifi - Raspbian : déconnexions itempestives
Replies: 10
Views: 3919

Re: Wifi - Raspbian : déconnexions itempestives

Il y a une option que j'utilise dans interfaces:dans la description de wlan0:
"wireless-power off"
bon courage
Philippe
by phil95
Thu Aug 28, 2014 2:33 pm
Forum: Français
Topic: Liaison série entre Raspberry
Replies: 8
Views: 3077

Re: Liaison série entre Raspberry

Ca veut dire que le Tx du 2 et le Tx du 3 sont branchés sur le Rx du 1.
Or on ne peut pas connecter directement 2 sorties sur une entrée.
Et le Tx du 2 et le Tx du 3 sont en court-circuit ...
Philippe
by phil95
Thu Aug 28, 2014 8:31 am
Forum: Français
Topic: [problème de lecture sur GPIO] IR + RF
Replies: 40
Views: 4999

Re: [problème de lecture sur GPIO] IR + RF

Bonjour Il faudrait mesurer les tensions en sortie de récepteur dans les 4 cas: 3V bouton sorti 3V bouton appuyé 5V bouton sorti 5V bouton appuyé Il est vraisemblable que la tension bouton sorti est supérieure en 5V qu'en 3V Si cette tension est voisine du seuil de basculement du GPIO, elle explique...
by phil95
Fri Aug 15, 2014 12:13 pm
Forum: Français
Topic: [Noob inside] Piloter en 3G ses radiateurs
Replies: 6
Views: 1853

Re: [Noob inside] Piloter en 3G ses radiateurs

Peut etre pas si facile que ca ... Certains FAI vendent des modems USB 3G; ca marche sans doute avec Windows, avec un RPI je ne sais pas (ORANGE par exemple). De meme certaines boutiques vendent de tels modems (on a juste a ajouter une carte SIM), mais est-ce que ca marche sans windows ? Un lien peu...

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