d668281b4a
The zephyr-serial w1 driver introduced in this commit implements all routines for the w1 api on top of the zephyr serial driver. W1 bit read, write, and reset operations are executed by issuing polling zephyr serial byte read and write operations. The driver should be usable on most platforms in zephyr that have implemented support for the polling procedures of the serial driver. As not all serial drivers are implemented exactly the same minor additional quirks may be needed on some platforms. The most notable difference of polling serial driver implementations seems to be that some return immediately from poll_out after the transmission was started(e.g. STM32) and others wait until the transmission was completed before returning from poll_out (e.g. NRF). While this has influence on the timeout, both types are supported by this driver because the driver waits for a configurable time period until it terminates the read. The driver needs an appropriate open drain interface to be able to communicate with slaves. In the simpliest case this might be achived by configuring the mcu pins in open-drain configuration with a (sufficiently small) pull-up to 3V3/5V. Otherwise an external circuit needs to provide this interface. Overdrive and Standard Speed modes are supported by this driver. Signed-off-by: Thomas Stranger <thomas.stranger@outlook.com> |
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| .. | ||
| CMakeLists.txt | ||
| Kconfig | ||
| Kconfig.test | ||
| Kconfig.zephyr_serial | ||
| w1_common.c | ||
| w1_handlers.c | ||
| w1_net.c | ||
| w1_test.c | ||
| w1_zephyr_serial.c | ||