Daisy-Chaining SPI Devices

### ADUCM4050 Microcontroller SPI Configuration and Usage The ADUCM4050 is equipped with multiple serial communication interfaces including the Serial Peripheral Interface (SPI), which allows it to communicate efficiently with other devices or peripherals. The configuration of the SPI interface involves setting up specific registers within the microcontroller. For configuring the SPI module on the ADUCM4050, one must first initialize the necessary parameters such as clock speed, data order (MSB-first or LSB-first), mode bits for selecting master/slave operation, and polarity levels[^1]. This initialization typically occurs during system startup routines before any actual data transfer takes place over the SPI bus. In terms of practical implementation when connecting an external device like an AVR/Arduino or PIC microcontrollers mentioned earlier, considerations should be made regarding hardware resources required versus cost-effectiveness solutions available today [^2]. To establish a connection between two systems via SPI protocol while ensuring proper Daisy-Chaining setup among slave devices connected under single-master topology might involve adjusting certain settings related to chip select lines management along with synchronization aspects concerning frame format specifications provided by manufacturer documentation ^[1]. ```c // Example C code snippet showing how to configure SPI on ADUCM4050 void spi_init(void){ // Set SPI pins as alternate function GPIO_SetFunc(SPI_SCK_PORT, SPI_SCK_PIN, ALT_FUNC_SPI); GPIO_SetFunc(SPI_MOSI_PORT, SPI_MOSI_PIN, ALT_FUNC_SPI); // Configure SPI peripheral SPI_InitTypeDef spiInit; spiInit.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8; spiInit.Mode = SPI_MODE_MASTER; spiInit.Direction = SPI_DIRECTION_2LINES_FULLDUPLEX; spiInit.DataSize = SPI_DATASIZE_8BIT; spiInit.CLKPolarity = SPI_POLARITY_LOW; spiInit.CLKPhase = SPI_PHASE_1EDGE; spiInit.FirstBit = SPI_FIRSTBIT_MSB; HAL_SPI_Init(&hspi1, &spiInit); } ```
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