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The Echo R1 is a new open-hardware music player design, based on the STM32H743 microcontroller. Schematics and hardware documentation for it can be found here: - https://github.com/amachronic/echoplayer This is an incomplete port. The bootloader can be loaded using OpenOCD and it can draw to the LCD using SPI. SDRAM is working but hasn't been extensively tested. Change-Id: Ifd2bee15c49868fbc989683d3ca14dce48bf3e18
101 lines
2.6 KiB
C
101 lines
2.6 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Copyright (C) 2025 Aidan MacDonald
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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*
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****************************************************************************/
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#ifndef __SPI_STM32H743_H__
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#define __SPI_STM32H743_H__
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#include "system.h"
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#include <stddef.h>
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struct stm_spi;
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enum stm_spi_num
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{
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STM_SPI1,
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STM_SPI2,
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STM_SPI3,
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STM_SPI4,
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STM_SPI5,
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STM_SPI6,
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STM_SPI_COUNT,
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};
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/* Must match the SPI_CFG2.COMM register */
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enum stm_spi_mode
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{
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STM_SPIMODE_DUPLEX,
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STM_SPIMODE_TXONLY,
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STM_SPIMODE_RXONLY,
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STM_SPIMODE_HALF_DUPLEX,
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};
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/* Must match the SPI_CFG2.SP register */
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enum stm_spi_protocol
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{
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STM_SPIPROTO_MOTOROLA,
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STM_SPIPROTO_TI,
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};
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typedef void (*stm_spi_set_cs_t) (struct stm_spi *spi, bool enable);
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struct stm_spi_config
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{
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enum stm_spi_num num;
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enum stm_spi_mode mode;
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enum stm_spi_protocol proto;
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stm_spi_set_cs_t set_cs;
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uint32_t frame_bits: 6;
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uint32_t cpha: 1;
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uint32_t cpol: 1;
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uint32_t hw_cs_input: 1;
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uint32_t hw_cs_output: 1;
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uint32_t hw_cs_polarity: 1;
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uint32_t send_lsb_first: 1;
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uint32_t swap_mosi_miso: 1;
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};
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struct stm_spi
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{
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uint32_t regs;
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enum stm_spi_mode mode;
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stm_spi_set_cs_t set_cs;
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uint32_t frame_size;
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size_t tser_left;
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};
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void stm_spi_init(struct stm_spi *spi,
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const struct stm_spi_config *config) INIT_ATTR;
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int stm_spi_xfer(struct stm_spi *spi, size_t size,
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const void *tx_buf, void *rx_buf);
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static inline int stm_spi_transmit(struct stm_spi *spi,
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const void *buf, size_t size)
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{
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return stm_spi_xfer(spi, size, buf, NULL);
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}
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static inline int stm_spi_receive(struct stm_spi *spi,
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void *buf, size_t size)
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{
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return stm_spi_xfer(spi, size, NULL, buf);
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}
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#endif /* __SPI_STM32H743_H__ */
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