I am using esp-idf 3.3.
If I use malloc to allocate a 3KB buffer, then the system is crashing. I already have around 60KB heap.
I am using this buffer for LCD via spi. SPI is pushing it via DMA.
If I use static/global 3KB instead, it works fine.
Code: Select all
ILI9341 initialization.
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x40095d57 PS : 0x00060f33 A0 : 0x80095b2b A1 : 0x3ffbb420
0x40095d57: block_data_size at /home/vinod/esp/esp-idf/components/heap/multi_heap.c:699
A2 : 0xffffffff A3 : 0x00060f23 A4 : 0x00060f20 A5 : 0x00000001
A6 : 0x3ffbd8d0 A7 : 0x0000013f A8 : 0xc002fd78 A9 : 0xc002fd74
A10 : 0x3ffcb0f0 A11 : 0x00060f23 A12 : 0x00060f20 A13 : 0xb33fffff
A14 : 0x0000002a A15 : 0x3ffce780 SAR : 0x0000001e EXCCAUSE: 0x0000001c
EXCVADDR: 0xffffffff LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xffffffff
ELF file SHA256: d5bfe723743f08b06c063aff7d0a345ac585e1dd6e9531818db895e0beda60cc
Backtrace: 0x40095d57:0x3ffbb420 0x40095b28:0x3ffbb440 0x400853c2:0x3ffbb470 0x4009450a:0x3ffbb4a0 0x4010620f:0x3ffbb4e0 0x400d0896:0x3ffbb510
0x40095d57: block_data_size at /home/vinod/esp/esp-idf/components/heap/multi_heap.c:699
0x40095b28: multi_heap_malloc_impl at /home/vinod/esp/esp-idf/components/heap/multi_heap.c:699
0x400853c2: heap_caps_malloc at /home/vinod/esp/esp-idf/components/heap/heap_caps.c:232
0x4009450a: xTaskCreatePinnedToCore at /home/vinod/esp/esp-idf/components/freertos/tasks.c:3507
0x4010620f: xTaskCreate at /home/vinod/esp/esp-idf/components/freertos/include/freertos/task.h:440
(inlined by) app_main at /home/vinod/workspace/myproject/project1/main/main.c:133
0x400d0896: main_task at /home/vinod/esp/esp-idf/components/esp32/cpu_start.c:542
uint8_t *buf1 = heap_caps_malloc(3200, MALLOC_CAP_DMA);
uint8_t *buf2 = heap_caps_malloc(3200, MALLOC_CAP_DMA);
or
uint8_t *buf1 = heap_caps_malloc(3200, MALLOC_CAP_32BIT|MALLOC_CAP_DMA);
uint8_t *buf2 = heap_caps_malloc(3200, MALLOC_CAP_32BIT|MALLOC_CAP_DMA);
or
uint8_t *buf1 = heap_caps_malloc(3200, MALLOC_CAP_32BIT);
uint8_t *buf2 = heap_caps_malloc(3200, MALLOC_CAP_32BIT);
etc
BUT result is same, crashing while using the memory for lcd spi.
I tried printing the memory after malloc and printing it as below after
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I (0) cpu_start: App cpu up.
I (630) heap_init: Initializing. RAM available for dynamic allocation:
I (636) heap_init: At 3FFAFF10 len 000000F0 (0 KiB): DRAM
I (642) heap_init: At 3FFB6388 len 00001C78 (7 KiB): DRAM
I (649) heap_init: At 3FFB9A20 len 00004108 (16 KiB): DRAM
I (655) heap_init: At 3FFBDB5C len 00000004 (0 KiB): DRAM
I (661) heap_init: At 3FFCD910 len 000126F0 (73 KiB): DRAM
I (667) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM
I (673) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM
I (680) heap_init: At 40096C64 len 0000939C (36 KiB): IRAM
I (686) cpu_start: Pro cpu start user code
I (33) cpu_start: Chip Revision: 1
W (33) cpu_start: Chip revision is higher than the one configured in menuconfig. Suggest to upgrade it.
I (36) cpu_start: Starting scheduler on PRO CPU.
I (0) cpu_start: Starting scheduler on APP CPU.
I (282) gpio: GPIO[2]| InputEn: 0| OutputEn: 1| OpenDrain: 0| Pullup: 0| Pulldown: 0| Intr:0
I (282) gpio: GPIO[34]| InputEn: 1| OutputEn: 0| OpenDrain: 0| Pullup: 1| Pulldown: 0| Intr:1
E (292) gpio: io_num=34 can only be input
E (292) gpio: gpio_set_level(176): GPIO output gpio_num error
ILI9341 initialization.
memory buf1 = 3ffce930
memory buf2 = 3ffcf5b4
Instead if I use
static uint8_t buf1[3200];
static uint8_t buf2[3200];
It works fine.
What could be the problem ?