Hi:
I use STM32L4P5RG with APS6404L-3SQR to develop GUI.
I want use QSPI PSRAM as data memory for GUI.
Now, I enable QSPI PSRAM as data memory as follows:
1.configure QSPI PSRAM , SPI with NVIC in CubeMX
2. add PSRAM (xrw) : ORIGIN = 0x70000000, LENGTH = 8M to LinkerScript.ld
3. add following to LinkerScript.ld again:
.ext_ram :
{
. = ALIGN(4);
_ext_ram_start = .; /* create a global symbol at ext_ram start */
*(.ext_ram) /* .ext_ram sections */
*(.ext_ram*) /* .ext_ram* sections */
. = ALIGN(4);
_ext_ram_end = .; /* define a global symbols at end of ext_ram */
} >PSRAM
4.configure PSRAM to memory map mode after MX_OCTOSPI1_Init/MX_OCTOSPI2_Init
5.create one global array out of main function for GUI, will use later by pointer:
__attribute__((section(".ext_ram"))) static uint8_t buf_for_disp[153600];
6.create two static arrays in main function for GUI, will use later by pointer:
__attribute__((section(".ext_ram"))) static uint8_t buf_1[153600];
__attribute__((section(".ext_ram"))) static uint8_t buf_2[153600];
7.later, SPI data will transfer to TFT by SPI DMA, the data is stored in arrays above.
The question is:
1. Should I enable NVIC for QSPI in CubeMX? If Yes, which value should the priority be (I don't use RTOS now, but maybe use later)?
2. Is this flow correct? Do I miss anything?
3. At first, the GUI work correctly, but after serval hours, the GUI can't display anything. I think the data in arrays is incorrect or the pointer address is wrong, but I don't know how to analyze this, because at first everything is OK, can you give me some advice?
