Oh, ok. Thanks for clarification! ср, 5 авг. 2020 г. в 01:03, David Sidrane <david.sidr...@nscdg.com>:
> Hi Oleg, > > > > There are many up_allocateheap In the source tree…but an F7 on PX4 master > has: > > > > And it does not use CONFIG_RAM_END (CONFIG_RAM_START+CONFIG_RAM_SIZE) > > > > I deleted them and it px4_fmuv5 still builds. I will clean that up when I > get past the upgrade. > > > > David > > > > > > *From:* Oleg Evseev [mailto:ev.m...@gmail.com] > *Sent:* Tuesday, August 04, 2020 1:04 PM > *To:* dev@nuttx.apache.org > *Subject:* Re: stm32f7 CONFIG_RAM understanding > > > > Hi David, > > > > As I see they are used to define: > > CONFIG_RAM_END (CONFIG_RAM_START+CONFIG_RAM_SIZE) > > which in turn is used in heap allocation (up_allocateheap). > > > > By the way I am working with px4 master and custom board stm32f767 > (software very close and based on fmu-v5). > > And I used > > CONFIG_RAM_SIZE=376832 > CONFIG_RAM_START=0x20020000 > > but on reboots start to get random hardfaults (looking on address in log > points to heap allocation functions) and sometimes fails advertising uorb > topics (also heap allocation problem as I see). > > > > While I'm investigating this I notice this difference with RAM size config > and ask this question (of course it may not be related to my issue). > > > > > > вт, 4 авг. 2020 г. в 22:49, David Sidrane <david.sidr...@nscdg.com>: > > Both are not used in the source. I would assume it is a legacy C&P from > the F4, that should be removed. > > > > *From:* Oleg Evseev [mailto:ev.m...@gmail.com] > *Sent:* Tuesday, August 04, 2020 12:45 PM > *To:* dev@nuttx.apache.org > *Subject:* Re: stm32f7 CONFIG_RAM understanding > > > > No, internal memory. > > > > For all boards > > stm32f769i-disco\ > stm32f746-ws\ > stm32f746g-disco\ > nucleo-144\ > > > > but just found that except stm32f769i-disco, it understandably defines > params for SRAM1 368Kb according to MCU memory map > > CONFIG_RAM_SIZE=376832 > CONFIG_RAM_START=0x20020000 > > > > вт, 4 авг. 2020 г. в 22:27, Gregory Nutt <spudan...@gmail.com>: > > External SRAM? > > > > On 8/4/2020 1:08 PM, Oleg Evseev wrote: > > Hi, > > > > I wonder why stm32f7 boards has such RAM parameters in defconfigs: > > CONFIG_RAM_SIZE=245760 > CONFIG_RAM_START=0x20010000 > > > > Where do these numbers come from while memory map is this? > > [image: изображение.png] > > > > --- > > With regards, > > Oleg > > > >
