本章将介绍NRF52840的SPI接口的应用,首先将介绍SPI的一个测试实例, 即把SPI的接口的MISO与MOSI连接在一起,进行回环测试,接着,将NRF52840 驱动一块0.96inch的OLED,并说明其中的注意事项。 本章要使用的例程为:004_SPI(Example),005_SPI(OLED) 6.1软件设计 6.1.1SPI介绍 NRF52840的SPI接口对应的引脚可自由分配,...
we will introduce a test example of SPI: connect the MISO of SPI interface to MOSI, and carry out loop-back test. Then, we will introduce how NRF52840 driver a 0.96 inch OLED and the precautions. The demos to be used in this chapter are: 004_SPI (Example), 005_SPI (OLED) ...
and with this workaround the problem is partly solved. But for some commands I need several SPI transactions to happen, and the code is getting stuck in the second one.
Unless I am missing something, this was my idea as a possible solution. Since the SPIM buffer pointers are double buffered, I was going to set up a third timer to count the number of SPI transfers -1 and interrupt the CPU. So while the last transfer is ongoing, the 3rd timer callbac...
You can have access to theSeeed Studio Grove ecosystemby connecting it to the compatibleSeeed Studio XIAO expansion board. We have developed more than400 Grove modules, covering a wide range of applications that can fulfill various needs. For example, you can make aBLE AI-driven Smartwatch Detec...
(ACL) • Up to 4x SPI master/3x SPI slave with EasyDMA • Root-of-trust (RoT) • Up to 2x I2C compatible 2-wire master/slave • Debug control and configuration • 2x UART (CTS/RTS) with EasyDMA • Access port protection (CTRL-AP) • Quadrature decoder (QDEC) • ...
64 MHz Arm Cortex-M4 with FPU 1 MB Flash, 256 KB RAM 2 Mbps, 1 Mbps, Long Range Bluetooth Low Energy Bluetooth mesh Thread, Zigbee +8 dBm TX Power 128-bit AES CCM, Arm CryptoCell-310 UART, SPI, TWI, PDM, I2S, QSPI, PWM 12-bit ADC NFC USB 2.0 Read more ...
*///static const SPIFlash_Device_t my_flash_devices[] = {// W25Q80DLX_EXAMPLE,//};/* * Specify the number of different devices that are listed in the array we just created. If you add more devices to the array, update this value to match. *///const int flashDevices = 1;#inclu...
我在OpenThread或nRF网站上找不到的是一个“制造商友好的”示例应用程序,例如,将OpenThread和一些自定义代码结合起来,通过I2C或SPI读取传感器数据,并通过MQTT (或MQTT-SN有没有一个如何为nRF52840加密狗构建这样的应用程序的例子?我知道我必须小心地在我的固件镜像中添加USB和引导加载<em...
1.69inch LCD Display Module, 240×280 Resolution, SPI Interface For this example we'll use SPI to connect to a 1.69 inch LCD with a 240x280 resolution. First connect your board to the LCD screen using the following image as a guide (in this case we're using the Xiao nrf52840 but...