Looks like to me you just halted the PRU. the comment: " // r2 contains of all GPIO1, so now you can inspect the value of bit 12 as desired ", I think is a hint you need to do something (write some code) to look at the value of r2.
your say "I found the following code and although it compiles the example app never exits while waiting for HALT" This sounds like you are referring to the program that loads and starts the Pru. Why don't you show all the code involved. If you follow the examples in the am335x_pru_package, you will see the App-loader C program. The App-loader initializes a linux interrupt and the PRU INTC (interrupt controler) so the PRU can send an interrrupt to the linux program. Are you doing something like this? if so, you are not sending the interrupt back to linix. You can look at some PRU programs in the examples of the am335x_pru_package. For example, There is the "PRU_memAccessPRUDataRam <https://github.com/beagleboard/am335x_pru_package/tree/master/pru_sw/example_apps/PRU_memAccessPRUDataRam>" which shows the linux program reading from the PRU data memory. Just put r2 from the example above into the PRU data memory and read in linux. On Tue, Jul 29, 2014 at 1:00 AM, Jacob Ole Juul Kolding <[email protected]> wrote: > Hi > > I found the following code and although it compiles the example app > never exits while waiting for HALT. And after that all other example > apps no longer work. > > #define GPIO0 0x44e07000 > #define GPIO1 0x4804c000 > #define GPIO2 0x481ac000 > #define GPIO_OE 0x134 > #define GPIO_DATAIN 0x138 > > MOV r3, GPIO1 | GPIO_OE > > LBBO r2, r3, 0, 4 > > SET r2, 12 // set bit 12 > > SBBO r2, r3, 0, 4 > > MOV r3, GPIO1 | GPIO_DATAIN > > LBBO r2, r3, 0, 4 // Store register contents into r2 > > // r2 contains of all GPIO1, so now you can inspect the value of > bit 12 as desired > > HALT > > can anyone tell what’s wrong or another way of doing this? > /Jacob > > -- > "In acting as if life has meaning, we will find, thank God, that it does" > - John Cottingham > > -- > 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]. > For more options, visit https://groups.google.com/d/optout. > -- John Stampfl -- 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]. For more options, visit https://groups.google.com/d/optout.
