Marian Buschsieweke 675dcc381c cpu/msp430: rework MSP430 x1xx periph drivers ... - Move common code for USART (shared SPI / UART peripheral) to its own file and allow sharing the USART peripheral to provide both UART and SPI in round-robin fashion. - Configure both UART and SPI bus via a `struct` in the board's `periph_conf.h` - this allows allocating the two UARTs as needed by the use case - since both USARTs signals have a fixed connection to a single GPIO, most configuration is moved to the CPU - the board now only needs to decide which bus is provided by which USART Note: Sharing an USART used as UART requires cooperation from the app: - If the UART is used in TX-only mode (no RX callback), the driver will release the USART while not sending - If the UART is used to also receive, the application needs to power the UART down while not expecting something to send. An `spi_acquire()` will be blocked while the UART is powered up.		2024-01-22 16:59:23 +01:00
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board.h	cpu/msp430fxyz: clean up clock initialization	2023-05-16 10:05:09 +02:00
periph_conf.h	cpu/msp430: rework MSP430 x1xx periph drivers	2024-01-22 16:59:23 +01:00