“Bluetooth device tree configuration”的版本间的差异
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在 [[Serial TTY device tree configuration]]中说明了USART DT配置。 | 在 [[Serial TTY device tree configuration]]中说明了USART DT配置。 | ||
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=== Bluetooth DT configuration (board level) === | === Bluetooth DT configuration (board level) === | ||
2020年11月5日 (四) 18:11的版本
目录
Article purpose
本文介绍如何配置“蓝牙” [1] 将外围设备“(或与框架关联的外围设备)”分配给 Linux® OS.
使用 设备树机制 [2]执行配置。
在我们的平台上选择的蓝牙配套芯片是赛普拉斯(Cypress)芯片 [3]
Bluetooth DT bindings documentation
The Bluetooth[4] 树绑定由以下部分组成：
Bluetooth DT configuration
此硬件描述是STM32微处理器设备树文件（扩展名为.dtsi）和板设备树文件（扩展名为.dts）的组合。有关设备树文件拆分的说明，请参见设备树
Bluetooth DT configuration (STM32 level)
USART外设节点位于``stm32mp157c.dtsi
- 这是一组属性，对于给定的STM32器件而言可能不变，例如：寄存器地址，时钟，复位...
在 Serial TTY device tree configuration中说明了USART DT配置。
Bluetooth DT configuration (board level)
&usart2 {
...
uart-has-rtscts; /* enable hardware flow control */
...
bluetooth { /* node of Bluetooth companion chip */
shutdown-gpios = <&gpioz 6 GPIO_ACTIVE_HIGH>; /* GPIO specifier, used to enable the BT module */
compatible = "brcm,bcm43438-bt";
max-speed = <3000000>;
};
};
Specific properties for USART:
- uart-has-rtscts; bool flag to enable hardware flow control
How to configure Bluetooth using CubeMX
The STM32CubeMX tool can be used to configure the STM32MPU device and get the corresponding platform configuration device tree files.
The STM32CubeMX may not support all the properties described in the above DT bindings documentation paragraph. If so, the tool inserts user sections in the generated device tree. These sections can then be edited to add some properties and they are preserved from one generation to another. Refer to STM32CubeMX user manual for further information.
