patacongo commented on issue #1643: URL: https://github.com/apache/incubator-nuttx/issues/1643#issuecomment-682707704
> For stm32f429i-disco it is about 300KiB, try to use the same value: > CONFIG_STM32_LTDC_FB_SIZE=307200 > This is the internal SRAM: CONFIG_RAM_SIZE=114688 CONFIG_RAM_START=0x20000000 The internal SRAM is insufficient to support frambebuffers. There are two framebuffers in the fb configuration that lie in external RAM: CONFIG_STM32_DMA2D_FB_BASE=0xD07B5000 CONFIG_STM32_DMA2D_FB_SIZE=307200 CONFIG_STM32_LTDC_FB_BASE=0xD076A000 CONFIG_STM32_LTDC_FB_SIZE=307200 The address is determined by which FMC chip select you use. The framebuffers are excluded from the heap via: CONFIG_HEAP2_BASE=0xD0000000 CONFIG_HEAP2_SIZE=7774208 Just setting the framebuffer size without initializing and managing the external memory would not work. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org
