From 50998fcfb916ae251309bd4b464f2c122e8cb30d Mon Sep 17 00:00:00 2001 From: jaseg Date: Fri, 9 Apr 2021 18:38:02 +0200 Subject: Repo re-org --- reset-controller/fw/src/serial.h | 85 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 85 insertions(+) create mode 100644 reset-controller/fw/src/serial.h (limited to 'reset-controller/fw/src/serial.h') diff --git a/reset-controller/fw/src/serial.h b/reset-controller/fw/src/serial.h new file mode 100644 index 0000000..73d2323 --- /dev/null +++ b/reset-controller/fw/src/serial.h @@ -0,0 +1,85 @@ +/* + * This file is part of the libusbhost library + * hosted at http://github.com/libusbhost/libusbhost + * + * Copyright (C) 2015 Amir Hammad + * + * + * libusbhost is free software: you can redistribute it and/or modify + * it under the terms of the GNU Lesser General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This library is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser General Public License + * along with this library. If not, see . + * + */ + +#ifndef __SERIAL_H__ +#define __SERIAL_H__ + +#include +#include +#include +#include +#include + +#include "sr_global.h" + +struct dma_tx_buf { + /* The following fields are accessed only from DMA ISR */ + ssize_t xfr_start; /* Start index of running DMA transfer */ + ssize_t xfr_end; /* End index of running DMA transfer plus one */ + bool wraparound; + ssize_t xfr_next; + + /* The following fields are written only from non-interrupt code */ + ssize_t wr_pos; /* Next index to be written */ + ssize_t wr_idx; + ssize_t chunk_end[8]; + +/* Make GCC shut up about the zero-size array member. */ +#pragma GCC diagnostic push +#pragma GCC diagnostic ignored "-Wpedantic" + /* Written outside ISR by usart_send_chunk_nonblocking, read via DMA */ + uint8_t data[0]; +#pragma GCC diagnostic pop +}; + +struct usart_desc { + struct dma_tx_buf tx_buf; + uint8_t data[512]; + + uint32_t tx_chunk_overruns, tx_byte_overruns; + uint32_t tx_errors; + + volatile uint8_t rx_buf[32]; + + int comm_led; + + USART_TypeDef *le_usart; + int le_usart_irqn; + DMA_Stream_TypeDef *tx_dmas; + int tx_dma_sn; + int tx_dma_ch; + DMA_TypeDef *tx_dma; + int tx_dma_irqn; +}; + +void usart_dma_init(volatile struct usart_desc *us, unsigned int baudrate); +int usart_send_chunk_nonblocking(volatile struct usart_desc *us, const char *chunk, size_t chunk_len); +int usart_putc_nonblocking(volatile struct usart_desc *us, char c); +int usart_putc_blocking(volatile struct usart_desc *us, char c); + +void usart_dma_stream_irq(volatile struct usart_desc *us); +int usart_flush(volatile struct usart_desc *us); +int usart_printf(volatile struct usart_desc *us, const char *fmt, ...); +int usart_printf_blocking(volatile struct usart_desc *us, const char *fmt, ...); +int usart_printf_blocking_va(volatile struct usart_desc *us, const char *fmt, va_list va); + +#endif // __SERIAL_H__ -- cgit