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docs(spi_master): fixed timing comments that only apply for ESP32

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Michael (XIAO Xufeng)
2024-02-29 16:51:31 +08:00
committed by Xiao Xufeng
parent 293f529cd7
commit 69d4893e85
2 changed files with 9 additions and 3 deletions
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3
components/esp_driver_spi/include/driver/spi_common.h
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@@ -89,7 +89,8 @@ typedef spi_common_dma_t spi_dma_chan_t;
*
* You can use this structure to specify the GPIO pins of the bus. Normally, the driver will use the
* GPIO matrix to route the signals. An exception is made when all signals either can be routed through
* the IO_MUX or are -1. In that case, the IO_MUX is used, allowing for >40MHz speeds.
* the IO_MUX or are -1. In that case, the IO_MUX is used. On ESP32, using GPIO matrix will bring about 25ns of input
* delay, which may cause incorrect read for >40MHz speeds.
*
* @note Be advised that the slave driver does not use the quadwp/quadhd lines and fields in spi_bus_config_t refering to these lines will be ignored and can thus safely be left uninitialized.
*/