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SPI: chip select can now be kept active if the bus has been acquired

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The user can now request the chip select to remain active after the current
transfer. In order to do so, he MUST acquire the bus first with `spi_device_acquire_bus()`
function, else, an error is returned.
This commit is contained in:
Omar Chebib
2021-05-13 11:53:44 +08:00
parent a1b5c38218
commit a6e14c37b2
9 changed files with 84 additions and 12 deletions
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10
components/hal/esp32s3/include/hal/spi_ll.h
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@@ -612,6 +612,16 @@ static inline void spi_ll_master_select_cs(spi_dev_t *hw, int cs_id)
}
}
/**
* Keep Chip Select activated after the current transaction.
*
* @param hw Beginning address of the peripheral registers.
* @param keep_active if 0 don't keep CS activated, else keep CS activated
*/
static inline void spi_ll_master_keep_cs(spi_dev_t *hw, int keep_active) {
hw->misc.cs_keep_active = (keep_active != 0) ? 1 : 0;
}
/*------------------------------------------------------------------------------
* Configs: parameters
*----------------------------------------------------------------------------*/