ESP32-S3 DDR SPI
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ESP32-S3 DDR SPI
Looking at the ESP32-S3 datasheet
section 3.5.2 Serial Peripheral Interface (SPI), in the SPI2 Generalpurpose SPI (GPSPI) mode part it's mentioned that SPI2 can do DDR at 40Mhz while in half duplex mode.
In the project i have a SPI slave chip that does DDR on the MISO line, as in MISO line needs to be sampled at both edges of the SCLK line. It's not a flash/ram chip, so I need to drive the SPI2 in the general purpose mode.
I wanted to confirm that this is what the datasheet says, but looking at API docs for ESP-IDF for ESP32-S3 only talks about SPI DDR for external flash modules.
Can someone clarify, can I use SPI2 in general purpose master mode with half duplex, to sample the MISO line on both edges of SCLK?
section 3.5.2 Serial Peripheral Interface (SPI), in the SPI2 Generalpurpose SPI (GPSPI) mode part it's mentioned that SPI2 can do DDR at 40Mhz while in half duplex mode.
In the project i have a SPI slave chip that does DDR on the MISO line, as in MISO line needs to be sampled at both edges of the SCLK line. It's not a flash/ram chip, so I need to drive the SPI2 in the general purpose mode.
I wanted to confirm that this is what the datasheet says, but looking at API docs for ESP-IDF for ESP32-S3 only talks about SPI DDR for external flash modules.
Can someone clarify, can I use SPI2 in general purpose master mode with half duplex, to sample the MISO line on both edges of SCLK?
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Re: ESP32-S3 DDR SPI
It does have a DDR feature, but I don't think this feature is in the driver yet... Can you share what chip you're trying to communicate with? I can tell the driver team what to focus on if I file an issue to implement this.
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Re: ESP32-S3 DDR SPI
The chip in question is RHD2164, you can see the DDR part on page 10 and 11
Re: ESP32-S3 DDR SPI
@ESP_Sprite
Any update on this? Is DDR implemented yet?
Any update on this? Is DDR implemented yet?
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- Posts: 9545
- Joined: Thu Nov 26, 2015 4:08 am
Re: ESP32-S3 DDR SPI
It is. Simply specify the flag SPI_DEVICE_DDRCLK.
Re: ESP32-S3 DDR SPI
Thanks.
I am asking, because today i wanted to test it with my new devkit:
https://eu.mouser.com/ProductDetail/Esp ... cyCode=PLN
and here is result:
As you can see OPI is enabled, also i selected DTR in menuconfig, but SPI Mode is SLOW READ.
Here is sdkconfig.defaults:
Thanks
I am asking, because today i wanted to test it with my new devkit:
https://eu.mouser.com/ProductDetail/Esp ... cyCode=PLN
and here is result:
Code: Select all
rst:0x1 (POWERON),boot:0x18 (SPI_FAST_FLASH_BOOT)
SPIWP:0xee
Octal Flash Mode Enabled
For OPI Flash, Use Default Flash Boot Mode
mode:SLOW_RD, clock div:1
load:0x3fce3810,len:0x16a0
load:0x403c9700,len:0xbd0
load:0x403cc700,len:0x2c94
entry 0x403c9900
I (32) boot: ESP-IDF v5.1-dev-437-g5c1044d84d 2nd stage bootloader
I (32) boot: compile time 07:59:59
I (32) boot: chip revision: V001
I (35) boot_comm: chip revision: 1, min. bootloader chip revision: 0
I (42) boot.esp32s3: Boot SPI Speed : 80MHz
I (47) boot.esp32s3: SPI Mode : SLOW READ
I (52) boot.esp32s3: SPI Flash Size : 32MB
I (57) boot: Enabling RNG early entropy source...
I (63) boot: Partition Table:
I (66) boot: ## Label Usage Type ST Offset Length
I (74) boot: 0 nvs WiFi data 01 02 00009000 00006000
I (81) boot: 1 phy_init RF data 01 01 0000f000 00001000
I (88) boot: 2 factory factory app 00 00 00010000 00100000
I (96) boot: End of partition table
I (100) boot_comm: chip revision: 1, min. application chip revision: 0
I (107) esp_image: segment 0: paddr=00010020 vaddr=3c090020 size=23418h (144408) map
I (150) esp_image: segment 1: paddr=00033440 vaddr=3fc98500 size=04f24h ( 20260) load
I (156) esp_image: segment 2: paddr=0003836c vaddr=40374000 size=07cach ( 31916) load
I (165) esp_image: segment 3: paddr=00040020 vaddr=42000020 size=80ecch (528076) map
I (291) esp_image: segment 4: paddr=000c0ef4 vaddr=4037bcac size=0c7b4h ( 51124) load
I (305) esp_image: segment 5: paddr=000cd6b0 vaddr=50000000 size=00010h ( 16) load
I (314) boot: Loaded app from partition at offset 0x10000
I (314) boot: Disabling RNG early entropy source...
W (326) FLASH: DO NOT USE FOR MASS PRODUCTION! Timing parameters will be updated in future IDF version.
I (327) octal_psram: ECC is enabled
I (329) octal_psram: vendor id : 0x0d (AP)
I (334) octal_psram: dev id : 0x02 (generation 3)
I (340) octal_psram: density : 0x03 (64 Mbit)
I (345) octal_psram: good-die : 0x01 (Pass)
I (351) octal_psram: Latency : 0x01 (Fixed)
I (356) octal_psram: VCC : 0x00 (1.8V)
I (361) octal_psram: SRF : 0x01 (Fast Refresh)
I (367) octal_psram: BurstType : 0x00 ( Wrap)
I (372) octal_psram: BurstLen : 0x03 (1024 Byte)
I (378) octal_psram: Readlatency : 0x02 (10 cycles@Fixed)
I (384) octal_psram: DriveStrength: 0x00 (1/1)
W (389) PSRAM: DO NOT USE FOR MASS PRODUCTION! Timing parameters will be updated in future IDF version.
I (400) esp_psram: Found 8MB SPI RAM device
I (404) esp_psram: Speed: 80MHz
I (445) mmu_psram: Instructions copied and mapped to SPIRAM
I (457) mmu_psram: Read only data copied and mapped to SPIRAM
Here is sdkconfig.defaults:
Code: Select all
CONFIG_IDF_TARGET="esp32s3"
CONFIG_ESPTOOLPY_OCT_FLASH=y
CONFIG_ESPTOOLPY_FLASHSIZE_32MB=y
CONFIG_SPIRAM=y
CONFIG_SPIRAM_MODE_OCT=y
CONFIG_SPIRAM_TYPE_ESPPSRAM64=y
CONFIG_SPIRAM_IGNORE_NOTFOUND=y
CONFIG_SPIRAM_TRY_ALLOCATE_WIFI_LWIP=y
CONFIG_SPIRAM_ECC_ENABLE=y
CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240=y
CONFIG_ESP32_WIFI_STATIC_RX_BUFFER_NUM=10
CONFIG_ESP32_WIFI_RX_BA_WIN=6
CONFIG_FREERTOS_HZ=1000
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- Posts: 9545
- Joined: Thu Nov 26, 2015 4:08 am
Re: ESP32-S3 DDR SPI
That is exactly the opposite of what OP asks (DDR for GSPI), suggest you start a new topic for this. One thing I do know is that we bring up octal stuff in fastread or slow-read mode in the bootloader and only switch to octal in the app code, that may be what you're seeing.
Re: ESP32-S3 DDR SPI
Have you achieved communication with RHD2164 with the ESP32 series chip? Is it available? @bbranisalv99@ESP_Sprite
Re: ESP32-S3 DDR SPI
Hi, is there an update with the project? I'm trying to do the same intan headstage spi communication.
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