Description
Board
ESP32-WROVER
Device Description
There are use cases, when an UART only is needed for RX or TX to another device.
If -1 is used as an argument for the RXD or TXD in SerialX.begin default pins are used, instead not using any GPIO for this transmit/receive direction (RXonly / TXonly UART).
The default GPIOs for Serial2 / UART2 are GPIO16 and GPIO17. This collides with the use of those pins for the SPIRAM on ESP32-WROVER.
Therefore when CONFIG_ESP32_SPIRAM_SUPPORT is set, either RX2 and TXD2 should be mapped to other GPIOs or a runtime error should be printed to the serial console.
Hardware Configuration
GPIO16 and GPIO17 are used for SPIRAM / PSRAM
Version
v2.0.2
IDE Name
IDF4.4
Operating System
irrelevant
Flash frequency
irrelevant
PSRAM enabled
yes
Upload speed
921600
Description
GPIO16 and GPIO17 are used as default GPIOs for UART2 / Serial2
Expected behaviour
-1 as parameter on RXD or TXD should lead to an TXonly or RXonly serial connection.
Or at least a warning should be printed when default GPIOs are used together with CONFIG_ESP32_SPIRAM_SUPPORT enabled.
Sketch
Serial2.begin(115200, SERIAL_8N1, -1, 22);Debug Message
[ 11060][I][HeapStatisticsLogger.hpp:19] run(): Internal | 267915 | 97867 | 65536 | 0
Entered 'xt_unhandled_exception()'
Entered 'panic_handler()'
Entering 'esp_panic_handler'
Guru Meditation Error: Core 0 panic'ed (LoadProhibited). Core 0: Exception was unhandled.
Core 0 register dump:
PC : 0x400971e1 PS(State) : 0x00060e30 A0(Return): 0x800980c7 A1(Stack) : 0x3ffd2b90
0x400971e1: block_size at /esp-idf/components/heap/heap_tlsf_block_functions.h:75
(inlined by) block_is_last at /esp-idf/components/heap/heap_tlsf_block_functions.h:86
(inlined by) tlsf_walk_pool at /esp-idf/components/heap/heap_tlsf.c:581
A2 : 0x0000084f A3 : 0x40098100 A4 : 0x3ffd2bd0 A5 : 0x3ffd2bec
0x40098100: multi_heap_get_info_tlsf at /esp-idf/components/heap/multi_heap.c:345
A6 : 0x000000fe A7 : 0x00000001 A8 : 0x8009735a A9 : 0x3ffd2b70
A10 : 0x00000854 A11 : 0x00060e23 A12 : 0x00060e20 A13 : 0x3ffd2bd0
A14 : 0x00000070 A15 : 0x3ffd29e0 SAR : 0x0000000a EXCCAUSE : 0x0000001c
EXCVADDR : 0x00000853 LBEG : 0x4008d4fe LEND : 0x4008d509 LCOUNT : 0x00000000
0x4008d4fe: memset at /builds/idf/crosstool-NG/.build/HOST-x86_64-apple-darwin12/xtensa-esp32-elf/src/newlib/newlib/libc/machine/xtensa/memset.S:150
0x4008d509: memset at /builds/idf/crosstool-NG/.build/HOST-x86_64-apple-darwin12/xtensa-esp32-elf/src/newlib/newlib/libc/machine/xtensa/memset.S:160
Backtrace:0x400971de:0x3ffd2b900x400980c4:0x3ffd2bb0 0x400d5093:0x3ffd2bd0 0x400e981c:0x3ffd2c10 0x400dd618:0x3ffd2c60 0x400954b3:0x3ffd2c80 0x400954ed:0x3ffd2ca0 0x40095674:0x3ffd2cd0 0x400957d5:0x3ffd2d00
0x400971de: offset_to_block at /esp-idf/components/heap/heap_tlsf_block_functions.h:134
(inlined by) block_next at /esp-idf/components/heap/heap_tlsf_block_functions.h:146
(inlined by) tlsf_walk_pool at /esp-idf/components/heap/heap_tlsf.c:588
0x400980c4: multi_heap_get_info_impl at /esp-idf/components/heap/multi_heap.c:370
0x400d5093: heap_caps_get_info at /esp-idf/components/heap/heap_caps.c:453
0x400e981c: HeapStatisticsLogger::run() at /main/personalities/../modules/HeapStatisticsLogger.hpp:25
Other Steps to Reproduce
No response
I have checked existing issues, online documentation and the Troubleshooting Guide
- I confirm I have checked existing issues, online documentation and Troubleshooting guide.