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Add PSRAM support #2919

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8bb30fd
Working PSRAM support
will-v-pi Apr 16, 2026
9c91318
Make auto-detect work
will-v-pi Apr 17, 2026
5f629d9
Delete boot2 method for PSRAM
will-v-pi Apr 20, 2026
2ddafcb
Add kitchen_sink_psram to bazel
will-v-pi Apr 20, 2026
33c8386
Add auto-detection of CS pin too
will-v-pi Apr 20, 2026
b3ce50f
Improve the API and tidy up
will-v-pi Apr 20, 2026
56ee783
More API improvements, add returns, and add multiple kitchen sink bin…
will-v-pi Apr 21, 2026
aaa31a6
Add PICO_TEST_FAILURE_STRING for psram kitchen sink, as it prints ERROR:
will-v-pi Apr 30, 2026
3c9331f
Add pico_override_flash_size function to match pico_override_psram_size
will-v-pi May 1, 2026
c7eab48
Prioritise flash_devinfo over compile definitions
will-v-pi May 1, 2026
c5a4164
Fix bazel build
will-v-pi May 1, 2026
691165a
Add psram_check_address to check if psram variable can be used
will-v-pi May 1, 2026
cc3163d
Add psram_or_malloc and psram_or_free
will-v-pi May 1, 2026
ed1e025
Fix for new bazel checks
will-v-pi May 1, 2026
b584ceb
Use empty PSRAM linker incls on RP2040
will-v-pi May 5, 2026
68a3016
Review fixups
will-v-pi May 6, 2026
bf3510d
Fix config check
will-v-pi May 6, 2026
25bd5b7
Merge remote-tracking branch 'origin/develop' into pico-psram
will-v-pi May 6, 2026
2afd108
Add psram to some adafruit boards
will-v-pi May 6, 2026
a3a6beb
Add psram to defcon32 badge
will-v-pi May 6, 2026
5e19f9b
Merge remote-tracking branch 'origin/develop' into pico-psram
will-v-pi May 6, 2026
1434c71
Review fixups
will-v-pi May 6, 2026
b6f9c9d
Review fixups
will-v-pi May 7, 2026
d670c2c
Reorder sizes in psram_eid_to_size
will-v-pi May 7, 2026
dc8f34a
Review fixups
will-v-pi May 7, 2026
8cfc503
Review fixups
will-v-pi May 8, 2026
b3caac8
Tweak check_board_header.py to also validate the PSRAM settings (#2924)
lurch May 8, 2026
7092268
Minor fixups
will-v-pi May 8, 2026
bac3b5b
Fix low power compilation issue with clang
will-v-pi May 8, 2026
c244bf5
Improve readability of atrans setup
will-v-pi May 8, 2026
78a83b3
Merge branch 'develop' into pico-psram
lurch May 9, 2026
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10 changes: 10 additions & 0 deletions src/boards/include/boards/pimoroni_pga2350.h
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Expand Up @@ -84,6 +84,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN PIMORONI_PGA2350_PSRAM_CS_PIN
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

// no PICO_SMPS_MODE_PIN
// no PICO_VBUS_PIN
// no PICO_VSYS_PIN
Expand Down
10 changes: 10 additions & 0 deletions src/boards/include/boards/pimoroni_pico_plus2_rp2350.h
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Expand Up @@ -91,6 +91,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN PIMORONI_PICO_PLUS2_PSRAM_CS_PIN
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

// The GPIO Pin used to read VBUS to determine if the device is battery powered.
#ifndef PICO_VBUS_PIN
#define PICO_VBUS_PIN 24
Expand Down
10 changes: 10 additions & 0 deletions src/boards/include/boards/pimoroni_pico_plus2_w_rp2350.h
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Expand Up @@ -83,6 +83,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN PIMORONI_PICO_PLUS2_W_PSRAM_CS_PIN
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

// The GPIO Pin used to monitor VSYS. Typically you would use this with ADC.
// There is an example in adc/read_vsys in pico-examples.
#ifndef PICO_VSYS_PIN
Expand Down
10 changes: 10 additions & 0 deletions src/boards/include/boards/sparkfun_iotnode_lorawan_rp2350.h
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Expand Up @@ -80,6 +80,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN 0
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

pico_board_cmake_set_default(PICO_RP2350_A2_SUPPORTED, 1)
#ifndef PICO_RP2350_A2_SUPPORTED
#define PICO_RP2350_A2_SUPPORTED 1
Expand Down
10 changes: 10 additions & 0 deletions src/boards/include/boards/sparkfun_iotredboard_rp2350.h
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Expand Up @@ -90,6 +90,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN SPARKFUN_IOTREDBOARD_RP2350_PSRAM_CS_PIN
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

// The IoT RedBoard has an SD Card.
#ifndef PICO_SD_CLK_PIN
#define PICO_SD_CLK_PIN 10
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10 changes: 10 additions & 0 deletions src/boards/include/boards/sparkfun_promicro_rp2350.h
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Expand Up @@ -78,6 +78,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN 19
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

// --- RP2350 VARIANT ---
#define PICO_RP2350A 1

Expand Down
10 changes: 10 additions & 0 deletions src/boards/include/boards/sparkfun_thingplus_rp2350.h
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Expand Up @@ -82,6 +82,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN 8
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

// The thing plus has a SD Card.
#ifndef PICO_SD_CLK_PIN
#define PICO_SD_CLK_PIN 2
Expand Down
10 changes: 10 additions & 0 deletions src/boards/include/boards/sparkfun_xrp_controller.h
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Expand Up @@ -82,6 +82,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN 47
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

#ifndef CYW43_WL_GPIO_COUNT
#define CYW43_WL_GPIO_COUNT 3
#endif
Expand Down
10 changes: 10 additions & 0 deletions src/boards/include/boards/weact_studio_rp2350b_core.h
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Expand Up @@ -79,6 +79,16 @@ pico_board_cmake_set_default(PICO_FLASH_SIZE_BYTES, (16 * 1024 * 1024))
#define PICO_FLASH_SIZE_BYTES (16 * 1024 * 1024)
#endif

// --- PSRAM ---
#ifndef PICO_PSRAM_CS_PIN
#define PICO_PSRAM_CS_PIN WEACT_STUDIO_RP2350B_PSRAM_CS_PIN
#endif

pico_board_cmake_set_default(PICO_PSRAM_SIZE_BYTES, (8 * 1024 * 1024))
#ifndef PICO_PSRAM_SIZE_BYTES
#define PICO_PSRAM_SIZE_BYTES (8 * 1024 * 1024)
#endif

// --- RP2350 VARIANT ---
// This means RP2350B.
#define PICO_RP2350A 0
Expand Down
1 change: 1 addition & 0 deletions src/cmake/rp2_common.cmake
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Expand Up @@ -65,6 +65,7 @@ pico_add_subdirectory(rp2_common/hardware_xosc)

if (PICO_COMBINED_DOCS OR NOT PICO_RP2040)
pico_add_subdirectory(rp2_common/hardware_powman)
pico_add_subdirectory(rp2_common/hardware_psram)
# Note in spite of the name this is usable on Arm as well as RISC-V:
pico_add_subdirectory(rp2_common/hardware_riscv_platform_timer)
pico_add_subdirectory(rp2_common/hardware_sha256)
Expand Down
4 changes: 4 additions & 0 deletions src/rp2040/pico_platform/BUILD.bazel
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Expand Up @@ -99,6 +99,7 @@ cc_library(
"//src/rp2040/pico_platform/script_include:rp2040_linker_scripts",
"//src/rp2_common/pico_standard_link/script_include:rp2_linker_scripts",
"//src/rp2_common/pico_standard_link:default_flash_region",
"//src/rp2_common/pico_standard_link:default_psram_region",
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"memmap_default",
],
)
Expand All @@ -118,6 +119,7 @@ cc_library(
"//src/rp2040/pico_platform/script_include:rp2040_linker_scripts",
"//src/rp2_common/pico_standard_link/script_include:rp2_linker_scripts",
"//src/rp2_common/pico_standard_link:default_flash_region",
"//src/rp2_common/pico_standard_link:default_psram_region",
"memmap_blocked_ram",
],
)
Expand All @@ -137,6 +139,7 @@ cc_library(
"//src/rp2040/pico_platform/script_include:rp2040_linker_scripts",
"//src/rp2_common/pico_standard_link/script_include:rp2_linker_scripts",
"//src/rp2_common/pico_standard_link:default_flash_region",
"//src/rp2_common/pico_standard_link:default_psram_region",
"memmap_copy_to_ram",
],
)
Expand All @@ -155,6 +158,7 @@ cc_library(
"//src/rp2_common/pico_crt0:no_warn_rwx_flag",
"//src/rp2040/pico_platform/script_include:rp2040_linker_scripts",
"//src/rp2_common/pico_standard_link/script_include:rp2_linker_scripts",
"//src/rp2_common/pico_standard_link:default_psram_region",
"memmap_no_flash",
],
)
2 changes: 2 additions & 0 deletions src/rp2040/pico_platform/memmap_blocked_ram.ld
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Expand Up @@ -12,6 +12,7 @@ INCLUDE "memmap_default.incl"
* └── memmap_default.incl rp2_common/pico_standard_link
* ├── set_memory_locations.incl rp2_common/pico_standard_link
* ├── memory_flash.incl rp2_common/pico_standard_link
* ├── memory_psram.incl rp2_common/pico_standard_link
* ├── memory_ram.incl rp2_common/pico_standard_link
* ├── memory_scratch.incl rp2_common/pico_standard_link
* ├── memory_generated.incl rp2_common/pico_standard_link
Expand Down Expand Up @@ -41,6 +42,7 @@ INCLUDE "memmap_default.incl"
* ├── section_generated_post_scratch.incl rp2_common/pico_standard_link
* ├── section_extra_post_scratch.incl rp2_common/pico_standard_link
* ├── sections_stack.incl rp2_common/pico_standard_link
* ├── sections_psram.incl rp2_common/pico_standard_link
* ├── section_flash_end.incl rp2_common/pico_standard_link
* ├── section_end.incl rp2_common/pico_standard_link
* ├── section_generated_post_end.incl rp2_common/pico_standard_link
Expand Down
2 changes: 2 additions & 0 deletions src/rp2040/pico_platform/memmap_copy_to_ram.ld
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Expand Up @@ -9,6 +9,7 @@ INCLUDE "memmap_copy_to_ram.incl"
* └── memmap_copy_to_ram.incl rp2_common/pico_standard_link
* ├── set_memory_locations.incl rp2_common/pico_standard_link
* ├── memory_flash.incl rp2_common/pico_standard_link
* ├── memory_psram.incl rp2_common/pico_standard_link
* ├── memory_ram.incl rp2_common/pico_standard_link
* ├── memory_scratch.incl rp2_common/pico_standard_link
* ├── memory_generated.incl rp2_common/pico_standard_link
Expand Down Expand Up @@ -37,6 +38,7 @@ INCLUDE "memmap_copy_to_ram.incl"
* ├── section_generated_post_scratch.incl rp2_common/pico_standard_link
* ├── section_extra_post_scratch.incl rp2_common/pico_standard_link
* ├── sections_stack.incl rp2_common/pico_standard_link
* ├── sections_psram.incl rp2_common/pico_standard_link
* ├── section_flash_end.incl rp2_common/pico_standard_link
* ├── section_end.incl rp2_common/pico_standard_link
* ├── section_generated_post_end.incl rp2_common/pico_standard_link
Expand Down
2 changes: 2 additions & 0 deletions src/rp2040/pico_platform/memmap_default.ld
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Expand Up @@ -9,6 +9,7 @@ INCLUDE "memmap_default.incl"
* └── memmap_default.incl rp2_common/pico_standard_link
* ├── set_memory_locations.incl rp2_common/pico_standard_link
* ├── memory_flash.incl rp2_common/pico_standard_link
* ├── memory_psram.incl rp2_common/pico_standard_link
* ├── memory_ram.incl rp2_common/pico_standard_link
* ├── memory_scratch.incl rp2_common/pico_standard_link
* ├── memory_generated.incl rp2_common/pico_standard_link
Expand Down Expand Up @@ -38,6 +39,7 @@ INCLUDE "memmap_default.incl"
* ├── section_generated_post_scratch.incl rp2_common/pico_standard_link
* ├── section_extra_post_scratch.incl rp2_common/pico_standard_link
* ├── sections_stack.incl rp2_common/pico_standard_link
* ├── sections_psram.incl rp2_common/pico_standard_link
* ├── section_flash_end.incl rp2_common/pico_standard_link
* ├── section_end.incl rp2_common/pico_standard_link
* ├── section_generated_post_end.incl rp2_common/pico_standard_link
Expand Down
2 changes: 2 additions & 0 deletions src/rp2040/pico_platform/memmap_no_flash.ld
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Expand Up @@ -8,6 +8,7 @@ INCLUDE "memmap_no_flash.incl"
* memmap_no_flash.ld rp2040/pico_platform
* └── memmap_no_flash.incl rp2_common/pico_standard_link
* ├── set_memory_locations.incl rp2_common/pico_standard_link
* ├── memory_psram.incl rp2_common/pico_standard_link
* ├── memory_ram.incl rp2_common/pico_standard_link
* ├── memory_scratch.incl rp2_common/pico_standard_link
* ├── memory_generated.incl rp2_common/pico_standard_link
Expand All @@ -32,6 +33,7 @@ INCLUDE "memmap_no_flash.incl"
* ├── section_generated_post_scratch.incl rp2_common/pico_standard_link
* ├── section_extra_post_scratch.incl rp2_common/pico_standard_link
* ├── sections_stack.incl rp2_common/pico_standard_link
* ├── sections_psram.incl rp2_common/pico_standard_link
* ├── section_end.incl rp2_common/pico_standard_link
* ├── section_generated_post_end.incl rp2_common/pico_standard_link
* ├── section_extra_post_end.incl rp2_common/pico_standard_link
Expand Down
4 changes: 2 additions & 2 deletions src/rp2350/boot_stage2/boot_stage2.ld
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@@ -1,7 +1,7 @@
MEMORY {
/* We are loaded to the top 256 bytes of SRAM, which is above the bootrom
stack. Note 4 bytes occupied by checksum. */
SRAM(rx) : ORIGIN = 0x20081f00, LENGTH = 252
stack. */
SRAM(rx) : ORIGIN = 0x20081f00, LENGTH = 256
}

SECTIONS {
Expand Down
3 changes: 3 additions & 0 deletions src/rp2350/pico_platform/BUILD.bazel
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Expand Up @@ -93,6 +93,7 @@ cc_library(
"//src/rp2350/pico_platform/script_include:rp2350_linker_scripts",
"//src/rp2_common/pico_standard_link/script_include:rp2_linker_scripts",
"//src/rp2_common/pico_standard_link:default_flash_region",
"//src/rp2_common/pico_standard_link:default_psram_region",
"memmap_default",
],
)
Expand All @@ -112,6 +113,7 @@ cc_library(
"//src/rp2350/pico_platform/script_include:rp2350_linker_scripts",
"//src/rp2_common/pico_standard_link/script_include:rp2_linker_scripts",
"//src/rp2_common/pico_standard_link:default_flash_region",
"//src/rp2_common/pico_standard_link:default_psram_region",
"memmap_copy_to_ram",
],
)
Expand All @@ -130,6 +132,7 @@ cc_library(
"//src/rp2_common/pico_crt0:no_warn_rwx_flag",
"//src/rp2350/pico_platform/script_include:rp2350_linker_scripts",
"//src/rp2_common/pico_standard_link/script_include:rp2_linker_scripts",
"//src/rp2_common/pico_standard_link:default_psram_region",
"memmap_no_flash",
],
)
2 changes: 2 additions & 0 deletions src/rp2350/pico_platform/memmap_copy_to_ram.ld
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Expand Up @@ -9,6 +9,7 @@ INCLUDE "memmap_copy_to_ram.incl"
* └── memmap_copy_to_ram.incl rp2_common/pico_standard_link
* ├── set_memory_locations.incl rp2_common/pico_standard_link
* ├── memory_flash.incl rp2_common/pico_standard_link
* ├── memory_psram.incl rp2_common/pico_standard_link
* ├── memory_ram.incl rp2_common/pico_standard_link
* ├── memory_scratch.incl rp2_common/pico_standard_link
* ├── memory_generated.incl rp2_common/pico_standard_link
Expand Down Expand Up @@ -37,6 +38,7 @@ INCLUDE "memmap_copy_to_ram.incl"
* ├── section_generated_post_scratch.incl rp2_common/pico_standard_link
* ├── section_extra_post_scratch.incl rp2_common/pico_standard_link
* ├── sections_stack.incl rp2_common/pico_standard_link
* ├── sections_psram.incl rp2_common/pico_standard_link
* ├── section_flash_end.incl rp2_common/pico_standard_link
* ├── section_end.incl rp2_common/pico_standard_link
* ├── section_generated_post_end.incl rp2_common/pico_standard_link
Expand Down
2 changes: 2 additions & 0 deletions src/rp2350/pico_platform/memmap_default.ld
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Expand Up @@ -9,6 +9,7 @@ INCLUDE "memmap_default.incl"
* └── memmap_default.incl rp2_common/pico_standard_link
* ├── set_memory_locations.incl rp2_common/pico_standard_link
* ├── memory_flash.incl rp2_common/pico_standard_link
* ├── memory_psram.incl rp2_common/pico_standard_link
* ├── memory_ram.incl rp2_common/pico_standard_link
* ├── memory_scratch.incl rp2_common/pico_standard_link
* ├── memory_generated.incl rp2_common/pico_standard_link
Expand Down Expand Up @@ -38,6 +39,7 @@ INCLUDE "memmap_default.incl"
* ├── section_generated_post_scratch.incl rp2_common/pico_standard_link
* ├── section_extra_post_scratch.incl rp2_common/pico_standard_link
* ├── sections_stack.incl rp2_common/pico_standard_link
* ├── sections_psram.incl rp2_common/pico_standard_link
* ├── section_flash_end.incl rp2_common/pico_standard_link
* ├── section_end.incl rp2_common/pico_standard_link
* ├── section_generated_post_end.incl rp2_common/pico_standard_link
Expand Down
2 changes: 2 additions & 0 deletions src/rp2350/pico_platform/memmap_no_flash.ld
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Expand Up @@ -8,6 +8,7 @@ INCLUDE "memmap_no_flash.incl"
* memmap_no_flash.ld rp2350/pico_platform
* └── memmap_no_flash.incl rp2_common/pico_standard_link
* ├── set_memory_locations.incl rp2_common/pico_standard_link
* ├── memory_psram.incl rp2_common/pico_standard_link
* ├── memory_ram.incl rp2_common/pico_standard_link
* ├── memory_scratch.incl rp2_common/pico_standard_link
* ├── memory_generated.incl rp2_common/pico_standard_link
Expand All @@ -32,6 +33,7 @@ INCLUDE "memmap_no_flash.incl"
* ├── section_generated_post_scratch.incl rp2_common/pico_standard_link
* ├── section_extra_post_scratch.incl rp2_common/pico_standard_link
* ├── sections_stack.incl rp2_common/pico_standard_link
* ├── sections_psram.incl rp2_common/pico_standard_link
* ├── section_end.incl rp2_common/pico_standard_link
* ├── section_generated_post_end.incl rp2_common/pico_standard_link
* ├── section_extra_post_end.incl rp2_common/pico_standard_link
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