63 lines
1.6 KiB
C
63 lines
1.6 KiB
C
/* Reflow Oven Controller
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*
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* Copyright (C) 2021 Mario Hüttel <mario.huettel@gmx.net>
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*
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* This file is part of the Reflow Oven Controller Project.
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*
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* The reflow oven controller is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* The Reflow Oven Control Firmware is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with the reflow oven controller project.
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* If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef __SPI_H__
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#define __SPI_H__
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#include <stm32/stm32f4xx.h>
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#include <stdbool.h>
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enum stm_spi_prescaler {
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SPI_PRSC_DIV2 = 0,
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SPI_PRSC_DIV4 = 1,
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SPI_PRSC_DIV8 = 2,
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SPI_PRSC_DIV16 = 3,
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SPI_PRSC_DIV32 = 4,
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SPI_PRSC_DIV64 = 5,
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SPI_PRSC_DIV128 = 6,
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SPI_PRSC_DIV256 = 7,
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};
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struct stm_spi_settings {
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void (*cs_activate)(void);
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void (*cs_deactivate)(void);
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bool cpol;
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bool cpha;
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bool master;
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bool msb_first;
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enum stm_spi_prescaler prescaler;
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};
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struct stm_spi_dev {
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uint32_t magic;
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SPI_TypeDef *spi_regs;
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struct stm_spi_settings settings;
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};
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typedef void * stm_spi_handle;
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stm_spi_handle spi_init(struct stm_spi_dev *spi_dev_struct, SPI_TypeDef *spi_regs, const struct stm_spi_settings *settings);
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void spi_deinit(stm_spi_handle handle);
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int spi_transfer(stm_spi_handle handle, const uint8_t *tx, uint8_t *rx, uint32_t count, bool handle_cs);
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#endif /* __SPI_H__ */
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