SourceVu will show references to esp_himem_map() from the following samples and libraries:
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esp_himem_map() function
Map a block of high memory into the CPUs address space This effectively makes the block available for read/write operations.
Syntax
esp_err_t esp_himem_map(esp_himem_handle_t handle,
esp_himem_rangehandle_t range,
size_t ram_offset,
size_t range_offset,
size_t len,
int flags,
void **out_ptr);
Implemented in ![]()
esp_himem.c:299
Return value
- ESP_OK if the memory could be mapped - ESP_ERR_INVALID_ARG if offset, range or len aren't MMU-block-aligned (32K) - ESP_ERR_INVALID_SIZE if the offsets/lengths don't fit in the allocated memory or range - ESP_ERR_INVALID_STATE if a block in the selected ram offset/length is already mapped, or if a block in the selected range offset/length already has a mapping.
Notes
The region to be mapped needs to have offsets and sizes that are aligned to the SPI RAM MMU block size (32K)
Related Functions
Found 2 other functions taking a ![]()
esp_himem_ramdata_t
argument:
Function
Description
Allocate a block in high memory
Free a block of physical memory This clears out the associated handle making the memory available for re-allocation again. This will only succeed if none of the memory blocks currently have a mapping.