Squashed 'third_party/pico-sdk/' content from commit 2062372d2
Change-Id: Ic20f199d3ed0ea8d3a6a1bbf513f875ec7500cc6
git-subtree-dir: third_party/pico-sdk
git-subtree-split: 2062372d203b372849d573f252cf7c6dc2800c0a
Signed-off-by: Austin Schuh <austin.linux@gmail.com>
diff --git a/src/host/hardware_uart/uart.c b/src/host/hardware_uart/uart.c
new file mode 100644
index 0000000..e610402
--- /dev/null
+++ b/src/host/hardware_uart/uart.c
@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2020 Raspberry Pi (Trading) Ltd.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <stdio.h>
+#include "hardware/uart.h"
+
+#if defined(__unix) || defined(__APPLE__)
+#define _XOPEN_SOURCE 600 /* for ONLCR */
+#define __BSD_VISIBLE 1 /* for ONLCR in *BSD */
+
+#include <unistd.h>
+#include <termios.h>
+#include <fcntl.h>
+#include <stdlib.h>
+
+#ifndef FNONBLOCK
+#define FNONBLOCK O_NONBLOCK
+#endif
+
+struct termios _tty;
+static tcflag_t _res_oflg = 0;
+static tcflag_t _res_lflg = 0;
+
+void _resettty(void) {
+ if (!isatty(STDIN_FILENO))
+ return;
+
+ /* reset tty: */
+ _tty.c_oflag = _res_oflg;
+ _tty.c_lflag = _res_lflg;
+ tcsetattr(STDIN_FILENO, TCSADRAIN, &_tty);
+}
+
+void _inittty(void) {
+ if (!isatty(STDIN_FILENO))
+ return;
+
+ /* save tty: */
+ tcgetattr(STDIN_FILENO, &_tty);
+ _res_oflg = _tty.c_oflag;
+ _res_lflg = _tty.c_lflag;
+
+ /* set raw: */
+ _tty.c_lflag &= ~(ICANON | ICRNL);// | ISIG);
+ //_tty.c_oflag &= ~ONLCR;
+ tcsetattr(STDIN_FILENO, TCSANOW, &_tty);
+
+ fcntl(STDIN_FILENO, F_SETFL, FNONBLOCK);
+ atexit(_resettty);
+}
+
+#else
+void _inittty() {}
+#endif
+
+typedef struct {
+ bool dummy;
+} uart_hw_t;
+
+uart_inst_t *const uart0;
+uart_inst_t *const uart1;
+
+static int _nextchar = EOF;
+
+static bool _peekchar() {
+ if (_nextchar == EOF) {
+ _nextchar = getchar();
+ }
+ return _nextchar != EOF;
+}
+
+uint uart_init(uart_inst_t *uart, uint baud_rate) {
+ _inittty();
+ return baud_rate;
+}
+
+size_t uart_is_writable(uart_inst_t *uart) {
+ return 1;
+}
+
+// If returns 0, no data is available to be read from UART.
+// If returns nonzero, at least that many bytes can be written without blocking.
+size_t uart_is_readable(uart_inst_t *uart) {
+ return _peekchar() ? 1 : 0;
+}
+
+// Write len bytes directly from src to the UART
+void uart_write_blocking(uart_inst_t *uart, const uint8_t *src, size_t len) {
+ for (size_t i = 0; i < len; i++) {
+ uart_putc(uart, src[i]);
+ }
+}
+
+// Read len bytes directly from the UART to dst
+void uart_read_blocking(uart_inst_t *uart, uint8_t *dst, size_t len) {
+ for (size_t i = 0; i < len; i++) {
+ dst[i] = uart_getc(uart);
+ }
+}
+
+// ----------------------------------------------------------------------------
+// UART-specific operations and aliases
+
+void uart_putc(uart_inst_t *uart, char c) {
+ putchar(c);
+}
+
+void uart_puts(uart_inst_t *uart, const char *s) {
+ puts(s);
+}
+
+char uart_getc(uart_inst_t *uart) {
+ while (!_peekchar()) {
+ tight_loop_contents();
+ }
+ char rc = (char) _nextchar;
+ _nextchar = EOF;
+ return rc;
+}
+
+void uart_default_tx_wait_blocking() {
+
+}