S3 DRAM
Posted: Thu Sep 22, 2022 1:32 am
I'm looking to verify my findings about aviable DRAM in an IDF project.
I created a blink example for the S3 and compiled it, getting these sizes:
If I am reading this correctly, this means in practice the S3 has 13229 + 121939 = 135,168 bytes for an application's data RAM.
From the reference manual: "Internal SRAM 1 is a 384 KB, read-and-write memory space, addressed by the CPU through the data bus or instruction bus, in the same order, via the ranges described in Table 3-2."
How do I take as much as possible away from IRAM? When I follow this https://docs.espressif.com/projects/esp ... iram-usage I see the IRAM usage going down but the total DRAM available stays the same.
For example:
I'm now at 16.7% used because I set CONFIG_FREERTOS_PLACE_FUNCTIONS_INTO_FLASH. But nothing changed about DRAM.
Can I significantly get more DRAM? Say, a total of 300k?
I created a blink example for the S3 and compiled it, getting these sizes:
Code: Select all
Total sizes:
Used static IRAM: 56638 bytes ( 230082 remain, 19.8% used)
.text size: 55611 bytes
.vectors size: 1027 bytes
Used stat D/IRAM: 13229 bytes ( 121939 remain, 9.8% used)
.data size: 10629 bytes
.bss size: 2600 bytes
Used Flash size : 136051 bytes
.text : 100899 bytes
.rodata : 34896 bytes
Total image size: 203318 bytes (.bin may be padded larger)From the reference manual: "Internal SRAM 1 is a 384 KB, read-and-write memory space, addressed by the CPU through the data bus or instruction bus, in the same order, via the ranges described in Table 3-2."
How do I take as much as possible away from IRAM? When I follow this https://docs.espressif.com/projects/esp ... iram-usage I see the IRAM usage going down but the total DRAM available stays the same.
For example:
Code: Select all
Total sizes:
Used static IRAM: 47882 bytes ( 238838 remain, 16.7% used)
.text size: 46855 bytes
.vectors size: 1027 bytes
Used stat D/IRAM: 13229 bytes ( 121939 remain, 9.8% used)
.data size: 10629 bytes
.bss size: 2600 bytes
Used Flash size : 145403 bytes
.text : 110251 bytes
.rodata : 34896 bytes
Total image size: 203914 bytes (.bin may be padded larger)Can I significantly get more DRAM? Say, a total of 300k?