ESP32 Forum

Good afternoon,

I am trying to send a file having a size (500Ko) using BLE between a client and a server.
The file is read from Internal Flash chunk by chunk and sent using a write characteristic (Client characteristic).

During the file transfer, the following message appears on the client side.
BT_INIT: Malloc failed.

I have a chip with a 2Mo Embedded Flash.

Do you know what can happen ?
Thank you.

Thomas TRUILHE

同样的问题8M只识别到900K+.升级至5.0.1版本，问题依旧
This is esp32s3 chip with 2 CPU cores, WiFi/BLE, silicon revision 1, 16MB external flash
app_mainHeap summary for capabilities 0x00000400:
At 0x3c710000 len 983040 free 981136 allocated 0 min_free 981136
largest_free_block 966656 alloc_blocks 0 free_blocks 1 total_blocks 1
Totals:
free 981136 allocated 0 min_free 981136 largest_free_block 966656

起始地址也怪怪的
soc定义
#define SOC_EXTRAM_DATA_LOW 0x3C000000
#define SOC_EXTRAM_DATA_HIGH 0x3E000000
手册说明
在 CONFIG_SPIRAM_USE 中选择 “Make RAM allocatable using heap_caps_malloc(…, MALLOC_CAP_SPIRAM)” 选项。

启用上述选项后，片外 RAM 被映射到地址 0x3D000000，并将这个区域添加到携带 MALLOC_CAP_SPIRAM 标志的 堆内存分配器 。

程序如果想从片外存储器分配存储空间，则需要调用 heap_caps_malloc(size, MALLOC_CAP_SPIRAM)，之后可以调用 free() 函数释放这部分存储空间。