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// #################################################################################################
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// #################################################################################################
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// # << NEORV32: neorv32_spi.c - Serial Peripheral Interface Controller (SPI) HW Driver >> #
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// # << NEORV32: neorv32_spi.c - Serial Peripheral Interface Controller (SPI) HW Driver >> #
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// # ********************************************************************************************* #
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// # ********************************************************************************************* #
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// # BSD 3-Clause License #
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// # BSD 3-Clause License #
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// # #
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// # #
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// # Copyright (c) 2021, Stephan Nolting. All rights reserved. #
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// # Copyright (c) 2022, Stephan Nolting. All rights reserved. #
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// # #
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// # #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # Redistribution and use in source and binary forms, with or without modification, are #
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// # permitted provided that the following conditions are met: #
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// # permitted provided that the following conditions are met: #
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// # #
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// # #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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// # 1. Redistributions of source code must retain the above copyright notice, this list of #
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NEORV32_SPI.CTRL |= ((uint32_t)(1 << SPI_CTRL_EN));
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NEORV32_SPI.CTRL |= ((uint32_t)(1 << SPI_CTRL_EN));
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}
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}
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/**********************************************************************//**
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/**********************************************************************//**
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* Enable high-speed SPI mode (running at half of the processor clock).
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*
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* @note High-speed SPI mode ignores the programmed clock prescaler configuration.
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**************************************************************************/
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void neorv32_spi_highspeed_enable(void) {
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NEORV32_SPI.CTRL |= 1 << SPI_CTRL_HIGHSPEED;
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}
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/**********************************************************************//**
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* Disable high-speed SPI mode.
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*
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* @note High-speed SPI mode ignores the programmed clock prescaler configuration.
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**************************************************************************/
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void neorv32_spi_highspeed_disable(void) {
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NEORV32_SPI.CTRL &= ~(1 << SPI_CTRL_HIGHSPEED);
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}
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/**********************************************************************//**
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* Activate SPI chip select signal.
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* Activate SPI chip select signal.
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*
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*
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* @note The chip select output lines are LOW when activated.
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* @note The chip select output lines are LOW when activated.
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*
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*
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* @param cs Chip select line to activate (0..7).
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* @param cs Chip select line to activate (0..7).
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