nRF52832 — UART和指纹模块

本文介绍了一款指纹识别模组MG100的应用案例,该模组由北京铭光正讯科技有限公司提供。文中详细讨论了与nRF52832进行UART单工通信的方法,包括必要的函数实现、数据封包和发送函数的设计,以及串口数据接收和解析过程中的注意事项。

摘要生成于 C知道 ,由 DeepSeek-R1 满血版支持, 前往体验 >

 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

 XX  作       者:文化人

 XX  联系方式:

 XX  版权声明:原创文章,欢迎评论和转载~转载时能告诉我一声就最好了

 XX  要说的话:作者水平有限,难免有不足之处,恳请指正!

 XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

写在前面:因为客户的案子需要用到指纹识别,所以最终选用指纹识别模组MG100(北京铭光正讯科技有限公司),通讯方式是UART,因为是单工通信,所以数据解析协议相对简单。

1、首先是几个必须的函数,注册、识别、删除等;

2、指纹数据封包和发送函数;

3、串口数据接收及解析:

注意:nRF52832的一般IO口与指纹模块通讯,默认配置时Tx是有问题,需要修改为以下:

想必是跟IO口的驱动能力有关系;

### NRF52832 UART RX Pin Low Power Configuration For configuring the UART RX pin on an NRF52832 to achieve a lower power consumption, several aspects need consideration. The configuration involves setting up the UART peripheral with specific parameters that contribute towards minimizing energy usage while ensuring reliable communication. The UART interface can be configured using Nordic's SDK or directly through registers depending upon application requirements and development environment preferences. When aiming for low-power operation of the UART receiver (RX), one should ensure that unnecessary features are disabled where possible[^1]. To configure UART RX in a way that optimizes power: - **Flow Control**: Disable hardware flow control unless absolutely necessary as it adds overhead which increases current draw. - **Baud Rate Settings**: Choose baud rates carefully since higher values increase power consumption due to more frequent sampling by the UART module. - **Interrupt Handling**: Optimize interrupt handling routines associated with receiving data over UART; this includes processing received bytes promptly without delay so that peripherals like UARTE can enter sleep mode quickly after completing transfers[^2]. - **Peripheral Mode Selection**: Utilize appropriate modes such as EasyDMA when available because these allow direct memory access reducing CPU intervention during transfer operations thus saving power[^3]. Here is how you might set up UART settings programmatically within your project codebase targeting NRF52832 devices specifically optimized for reduced power use: ```c #include "nrf_uarte.h" // ... other includes... void uart_init(void){ nrf_drv_uart_config_t config = NRFX_UART_DEFAULT_CONFIG; // Set desired Baud rate here e.g., 9600 bps config.baudrate = NRF_UART_BAUDRATE_9600; // Ensure Hardware Flow Control is OFF if not needed config.flow_control = NRF_UART_HWFC_DISABLED; // Initialize UART driver instance based on provided configurations APP_ERROR_CHECK(nrf_drv_uart_init(&config)); } ``` Additionally, consider implementing wake-up mechanisms from deep-sleep states triggered only under certain conditions related to incoming serial traffic patterns rather than keeping UART active continuously at all times[^4].
评论 6
添加红包

请填写红包祝福语或标题

红包个数最小为10个

红包金额最低5元

当前余额3.43前往充值 >
需支付:10.00
成就一亿技术人!
领取后你会自动成为博主和红包主的粉丝 规则
hope_wisdom
发出的红包

打赏作者

文化人Sugar

你的鼓励将是我创作的最大动力

¥1 ¥2 ¥4 ¥6 ¥10 ¥20
扫码支付:¥1
获取中
扫码支付

您的余额不足,请更换扫码支付或充值

打赏作者

实付
使用余额支付
点击重新获取
扫码支付
钱包余额 0

抵扣说明:

1.余额是钱包充值的虚拟货币,按照1:1的比例进行支付金额的抵扣。
2.余额无法直接购买下载,可以购买VIP、付费专栏及课程。

余额充值