Recently I decide to make a "gps camera" for myself. It has many parts. but its core is simple:
I read GPS Sentence from UART, If I push that button, I write this info into SD card.
But the problem is, I would like to use a Nokia 5510 Display for some information display. It would share the same SPI bus with SD card. And I believe it shouldn't impossible, because the beauty of SPI / I²C bus is in such cases.
Automagic function "esp_vfs_fat_sdmmc_mount" would help me do the "spi_bus_initialize". But the same thing has been done by my Display driver too. I've tried to comment out the spi_bus_initialize behavier from function "sdspi_host_init_slot" which that automagic function leveradged for SD card initialization. but I still got panic.
The Trace is as follow:
Code: Select all
W (977) Display: Display init task ended
W (977) Display: task 'task_display_info'started
I (977) SD_CARD: Initializing SD card
I (977) SD_CARD: Using SPI peripheral
Guru Meditation Error: Core 1 panic'ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x40084065 PS : 0x00060031 A0 : 0x40082238 A1 : 0x3ffb0c60
0x40084065: spi_intr at /home/gfast2/esp/esp-idf/components/driver/spi_master.c:764 (discriminator 1)
0x40082238: _xt_lowint1 at /home/gfast2/esp/esp-idf/components/freertos/xtensa_vectors.S:1154
A2 : 0x3ffb3ba4 A3 : 0x00000001 A4 : 0x00000000 A5 : 0x40089968
0x40089968: _frxt_int_enter at /home/gfast2/esp/esp-idf/components/freertos/portasm.S:119
A6 : 0x0000759b A7 : 0x00000000 A8 : 0x00000001 A9 : 0x3ffb0c40
A10 : 0x00000000 A11 : 0x3ffb3bb8 A12 : 0x3ffb0c60 A13 : 0x3ffb3cc0
A14 : 0x00060021 A15 : 0x00060021 SAR : 0x00000017 EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000005 LBEG : 0x4000c2e0 LEND : 0x4000c2f6 LCOUNT : 0xffffffff
Core 1 was running in ISR context:
EPC1 : 0x40084065 EPC2 : 0x00000000 EPC3 : 0x00000000 EPC4 : 0x00000000
0x40084065: spi_intr at /home/gfast2/esp/esp-idf/components/driver/spi_master.c:764 (discriminator 1)
ELF file SHA256: 5a8f59436ee9a81aa30e720e06bffed131da23ba2079517ba184d8e3f13153e9
Backtrace: 0x40084065:0x3ffb0c60 0x40082235:0x3ffb0c90 0x400e60de:0x3ffb9500 0x400e6347:0x3ffb9540 0x400e89d6:0x3ffb9590 0x400e934e:0x3ffb95e0 0x400eb31d:0x3ffb9620 0x400d31fd:0x3ffb9670 0x40087cf9:0x3ffb9770
0x40084065: spi_intr at /home/gfast2/esp/esp-idf/components/driver/spi_master.c:764 (discriminator 1)
0x40082235: _xt_lowint1 at /home/gfast2/esp/esp-idf/components/freertos/xtensa_vectors.S:1154
0x400e60de: spi_cal_clock at /home/gfast2/esp/esp-idf/components/driver/spi_master.c:566
0x400e6347: spi_bus_add_device at /home/gfast2/esp/esp-idf/components/driver/spi_master.c:449 (discriminator 4)
0x400e89d6: init_spi_dev at /home/gfast2/esp/esp-idf/components/driver/sdspi_host.c:220
0x400e934e: sdspi_host_init_slot at /home/gfast2/esp/esp-idf/components/driver/sdspi_host.c:287
0x400eb31d: esp_vfs_fat_sdmmc_mount at /home/gfast2/esp/esp-idf/components/fatfs/src/vfs_fat_sdmmc.c:73
0x400d31fd: sd_card_task(void*) at /home/gfast2/workspace/gpsrecorder/main/sd_card.cpp:93
0x40087cf9: vPortTaskWrapper at /home/gfast2/esp/esp-idf/components/freertos/port.c:403
CPU halted.
A Off-Topic Question:
From SPI [url=https://docs.espressif.com/projects/esp ... aster.html]Master driver Documentation[url] I found this Note:
Should I watch out this for my application? At least in my trial I can't init SPI Bus correctlly when I try to use DMA when calling "spi_bus_initialize()" (-> '0' has to be set as the value of the last parameter)Half duplex transactions with both read and write phases are not supported when using DMA. See Known Issues for details and workarounds.
Cheers
Gfast2