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| author | jaseg <git-bigdata-wsl-arch@jaseg.de> | 2021-04-09 18:38:02 +0200 |
|---|---|---|
| committer | jaseg <git-bigdata-wsl-arch@jaseg.de> | 2021-04-09 18:38:57 +0200 |
| commit | 50998fcfb916ae251309bd4b464f2c122e8cb30d (patch) | |
| tree | 4ecf7a7443b75ab51c4dc0c0fc9289342dc7d6a0 /reset-controller/fw/src/serial.h | |
| parent | 312fee491cfab436d52db4b6265107e20f3e1293 (diff) | |
| download | master-thesis-50998fcfb916ae251309bd4b464f2c122e8cb30d.tar.gz master-thesis-50998fcfb916ae251309bd4b464f2c122e8cb30d.tar.bz2 master-thesis-50998fcfb916ae251309bd4b464f2c122e8cb30d.zip | |
Repo re-org
Diffstat (limited to 'reset-controller/fw/src/serial.h')
| -rw-r--r-- | reset-controller/fw/src/serial.h | 85 |
1 files changed, 85 insertions, 0 deletions
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 <amir.hammad@hotmail.com>
+ *
+ *
+ * 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 <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#ifndef __SERIAL_H__
+#define __SERIAL_H__
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <errno.h>
+#include <stdbool.h>
+
+#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__
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