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boards: lilygo: ttgo_lora32: enable SDHC support

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device tree:
enable support for the SDHC controller to use the micro SD card slot

documentation:
- added instructions for SD card and OLED samples
- added links to code samples

defconfig:
added CONFIG_ESP32_USE_UNSUPPORTED_REVISION=y to
ttgo_lora32_esp32_procpu_defconfig

The chip on the board is a ESP32 chip revision 1.
The board will not boot, it displays the following warning at boot:

I (35) boot: chip revision: v1.0
E (38) boot: You are using ESP32 chip revision (1) that is unsupported.
While it may work, it could cause unexpected behavior or issues.
E (50) boot: Proceeding with this ESP32 chip revision is not recommended
unless you fully understand the potential risk and limitations.
E (62) boot: If you choose to continue, please enable the
'CONFIG_ESP32_USE_UNSUPPORTED_REVISION' in your project configuration.
E (73) boot: HW init failed, aborting

In order to prevent a boot loop, CONFIG_ESP32_USE_UNSUPPORTED_REVISION=y
was added to the defconfig.

Signed-off-by: Lothar Felten <lothar.felten@gmail.com>
This commit is contained in:
Lothar Felten 2024-07-18 23:14:50 +02:00 • committed by Alberto Escolar
commit e7c3434685
6 changed files with 47 additions and 24 deletions
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31
boards/lilygo/ttgo_lora32/doc/index.rst
View file

@ -39,13 +39,13 @@ of the Lilygo TTGO LoRa32 board.
+------------------+-------------------------------------------------------------------------+
| Power Switch | Sliding power switch. |
+------------------+-------------------------------------------------------------------------+
| LCD screen | Built-in OLED display \(`SSD1306`_, 0.96", 128x64 px\) controlled |
| OLED display | Built-in OLED display \(`SSD1306`_, 0.96", 128x64 px\) controlled |
| | by I2C interface |
+------------------+-------------------------------------------------------------------------+
| SX1276/SX1278 | LoRa radio frontend chip, connected via SPI. |
| | Use SX1276 for 433MHz and SX1276 for 868/915/923MHz. |
+------------------+-------------------------------------------------------------------------+
| TF card slot | TF card slot wired to the SD interface of the MCU. |
| TF card slot | TF card slot wired to the SDHC interface of the MCU. |
+------------------+-------------------------------------------------------------------------+
@ -195,30 +195,15 @@ message in the monitor:
***** Booting Zephyr OS vx.x.x-xxx-gxxxxxxxxxxxx *****
Hello World! ttgo_lora32
LoRa samples
Code samples
============
There are two LoRa samples that will work out of the box with this board.
The following sample applications will work out of the box with this board:
To build the LoRa transmit sample application using sysbuild use the command:
.. zephyr-app-commands::
:tool: west
:zephyr-app: samples/drivers/lora/send
:board: ttgo_lora32/esp32/procpu
:goals: build
:west-args: --sysbuild
:compact:
To build the LoRa receive sample application using sysbuild use the command:
.. zephyr-app-commands::
:tool: west
:zephyr-app: samples/drivers/lora/receive
:board: ttgo_lora32/esp32/procpu
:goals: build
:west-args: --sysbuild
:compact:
* :zephyr:code-sample:`lora-send`
* :zephyr:code-sample:`lora-receive`
* :zephyr:code-sample:`fs`
* :zephyr:code-sample:`character-frame-buffer`
Debugging
*********

8
boards/lilygo/ttgo_lora32/ttgo_lora32-pinctrl.dtsi
View file

@ -41,5 +41,11 @@
output-high;
};
};
sdhc0_default: sdhc0_default {
group1 {
pinmux = <SDHC0_CD_GPIO34>;
bias-pull-up;
output-high;
};
};
};

1
boards/lilygo/ttgo_lora32/ttgo_lora32_esp32_appcpu.yaml
View file

@ -24,4 +24,5 @@ testing:
- cmsis_rtos
- jwt
- zdsp
- sdhc
vendor: lilygo

27
boards/lilygo/ttgo_lora32/ttgo_lora32_esp32_procpu.dts
View file

@ -18,6 +18,7 @@
uart-0 = &uart0;
i2c-0 = &i2c0;
watchdog0 = &wdt0;
sdhc0 = &sdhc1;
lora0 = &lora0;
};
@ -28,6 +29,7 @@
zephyr,flash = &flash0;
zephyr,code-partition = &slot0_partition;
zephyr,display = &ssd1306_128x64;
zephyr,sdhc = &sdhc1;
};
leds {
@ -121,6 +123,31 @@
status = "okay";
};
&sdhc {
sdhc1: sdhc@1 {
status = "okay";
pinctrl-0 = <&sdhc0_default>;
pinctrl-names = "default";
power-delay-ms = <100>;
max-bus-freq = <52000000>;
bus-width = <4>;
clk-pin = <14>;
cmd-pin = <15>;
d0-pin = <2>;
d1-pin = <4>;
d2-pin = <12>;
d3-pin = <13>;
mmc {
compatible = "zephyr,sdmmc-disk";
disk-name = "SD";
status = "okay";
};
};
};
&flash0 {
status = "okay";
partitions {

1
boards/lilygo/ttgo_lora32/ttgo_lora32_esp32_procpu.yaml
View file

@ -14,6 +14,7 @@ supported:
- display
- lora
- nvs
- sdhc
testing:
ignore_tags:
- net

3
boards/lilygo/ttgo_lora32/ttgo_lora32_esp32_procpu_defconfig
View file

@ -8,3 +8,6 @@ CONFIG_UART_CONSOLE=y
CONFIG_GPIO=y
CONFIG_I2C=y
# the following config is required to support chips of revision 1
CONFIG_ESP32_USE_UNSUPPORTED_REVISION=y