Difference between revisions of "Spi device tree source code"
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m (Add sample device bindings file in yaml format.) |
m (Add wiki table syntax to support side by side file excerpt presentation.) |
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| − | In Zephyr RTOS' supported board dts files find . | + | In Zephyr RTOS' supported board dts files we find SPI peripherals defined for several boards. Here are excerpts |
| + | <i> zephyr/boards/arm/sparkfun_thing_plus_nrf9160/sparkfun_thing_plus_nrf9160_common.dts</i> | ||
| + | {- | ||
| + | |- | ||
| + | | | ||
| + | <pre> | ||
| + | |||
| + | 1 | ||
| + | |||
| + | </pre> | ||
| + | | | ||
| + | <pre> | ||
| + | |||
| + | &spi3 { | ||
| + | compatible = "nordic,nrf-spim"; | ||
| + | status = "okay"; | ||
| + | cs-gpios = <&gpio0 7 GPIO_ACTIVE_LOW>; | ||
| + | pinctrl-0 = <&spi3_default>; | ||
| + | pinctrl-1 = <&spi3_sleep>; | ||
| + | pinctrl-names = "default", "sleep"; | ||
| + | w25q32jv: w25q32jv@0 { | ||
| + | compatible = "jedec,spi-nor"; | ||
| + | label = "W25Q32JV"; | ||
| + | reg = <0>; | ||
| + | spi-max-frequency = <40000000>; | ||
| + | wp-gpios = <&gpio0 8 GPIO_ACTIVE_LOW>; | ||
| + | hold-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>; | ||
| + | size = <0x2000000>; | ||
| + | has-dpd; | ||
| + | t-enter-dpd = <3000>; | ||
| + | t-exit-dpd = <30000>; | ||
| + | jedec-id = [ ef 40 16 ]; | ||
| + | }; | ||
| + | }; | ||
| + | |||
| + | </pre> | ||
| + | | | ||
| + | |||
| + | | | ||
| + | |||
| + | |} | ||
Revision as of 22:31, 11 August 2022
2022-08-11 Thursday
Notes on SPI device tree source, with goal to add SPI device to modified RPi Pico DTS files, which build firmware to run on Sparkfun DEV-18288 board.
In Zephyr RTOS' supported board dts files we find SPI peripherals defined for several boards. Here are excerpts
zephyr/boards/arm/sparkfun_thing_plus_nrf9160/sparkfun_thing_plus_nrf9160_common.dts {- |- |
1
|
&spi3 {
compatible = "nordic,nrf-spim";
status = "okay";
cs-gpios = <&gpio0 7 GPIO_ACTIVE_LOW>;
pinctrl-0 = <&spi3_default>;
pinctrl-1 = <&spi3_sleep>;
pinctrl-names = "default", "sleep";
w25q32jv: w25q32jv@0 {
compatible = "jedec,spi-nor";
label = "W25Q32JV";
reg = <0>;
spi-max-frequency = <40000000>;
wp-gpios = <&gpio0 8 GPIO_ACTIVE_LOW>;
hold-gpios = <&gpio0 10 GPIO_ACTIVE_LOW>;
size = <0x2000000>;
has-dpd;
t-enter-dpd = <3000>;
t-exit-dpd = <30000>;
jedec-id = [ ef 40 16 ];
};
};
|
|
|}
^ YAML device bindings files
To support a typical development kit or custom board with multiple peripherals we need a device bindings file comparable to this ... bindings file:
- ~/projects-sandbox/workspace-for-rpi/zephyr/boards/arm/nrf9160dk_nrf9160/nrf9160dk_nrf9160.yaml
identifier: nrf9160dk_nrf9160 name: nRF9160-DK-NRF9160 type: mcu arch: arm toolchain: - gnuarmemb - xtools - zephyr ram: 88 flash: 256 supported: - arduino_gpio - arduino_i2c - gpio - i2c - pwm - spi - watchdog - counter