X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fcc1111%2Fao_serial.c;fp=src%2Fcc1111%2Fao_serial.c;h=82370c6426acaa8a349224c56aae3d1cfb82e7cd;hp=0000000000000000000000000000000000000000;hb=9513be7f9d3d0b0ec29f6487fa9dc8f1ac24d0de;hpb=3bfe8df44b575ca430ffaa051e20faa955a06c03

diff --git a/src/cc1111/ao_serial.c b/src/cc1111/ao_serial.c
new file mode 100644
index 00000000..82370c64
--- /dev/null
+++ b/src/cc1111/ao_serial.c
@@ -0,0 +1,175 @@
+/*
+ * Copyright © 2009 Keith Packard <keithp@keithp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; version 2 of the License.
+ *
+ * This program 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
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+
+#include "ao.h"
+
+volatile __xdata struct ao_fifo	ao_usart1_rx_fifo;
+volatile __xdata struct ao_fifo	ao_usart1_tx_fifo;
+
+void
+ao_serial_rx1_isr(void) __interrupt 3
+{
+	if (!ao_fifo_full(ao_usart1_rx_fifo))
+		ao_fifo_insert(ao_usart1_rx_fifo, U1DBUF);
+	ao_wakeup(&ao_usart1_rx_fifo);
+#if USE_SERIAL_STDIN
+	ao_wakeup(&ao_stdin_ready);
+#endif
+}
+
+static __xdata uint8_t ao_serial_tx1_started;
+
+static void
+ao_serial_tx1_start(void)
+{
+	if (!ao_fifo_empty(ao_usart1_tx_fifo) &&
+	    !ao_serial_tx1_started)
+	{
+		ao_serial_tx1_started = 1;
+		ao_fifo_remove(ao_usart1_tx_fifo, U1DBUF);
+	}
+}
+
+void
+ao_serial_tx1_isr(void) __interrupt 14
+{
+	UTX1IF = 0;
+	ao_serial_tx1_started = 0;
+	ao_serial_tx1_start();
+	ao_wakeup(&ao_usart1_tx_fifo);
+}
+
+char
+ao_serial_getchar(void) __critical
+{
+	char	c;
+	while (ao_fifo_empty(ao_usart1_rx_fifo))
+		ao_sleep(&ao_usart1_rx_fifo);
+	ao_fifo_remove(ao_usart1_rx_fifo, c);
+	return c;
+}
+
+#if USE_SERIAL_STDIN
+char
+ao_serial_pollchar(void) __critical
+{
+	char	c;
+	if (ao_fifo_empty(ao_usart1_rx_fifo))
+		return AO_READ_AGAIN;
+	ao_fifo_remove(ao_usart1_rx_fifo,c);
+	return c;
+}
+#endif
+
+void
+ao_serial_putchar(char c) __critical
+{
+	while (ao_fifo_full(ao_usart1_tx_fifo))
+		ao_sleep(&ao_usart1_tx_fifo);
+	ao_fifo_insert(ao_usart1_tx_fifo, c);
+	ao_serial_tx1_start();
+}
+
+void
+ao_serial_drain(void) __critical
+{
+	while (!ao_fifo_empty(ao_usart1_tx_fifo))
+		ao_sleep(&ao_usart1_tx_fifo);
+}
+
+static __code struct {
+	uint8_t	baud;
+	uint8_t	gcr;
+} ao_serial_speeds[] = {
+	/* [AO_SERIAL_SPEED_4800] = */ {
+		/* .baud = */ 163,
+		/* .gcr  = */ (7 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
+	},
+	/* [AO_SERIAL_SPEED_9600] = */ {
+		/* .baud = */ 163,
+		/* .gcr  = */ (8 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
+	},
+	/* [AO_SERIAL_SPEED_19200] = */ {
+		/* .baud = */ 163,
+		/* .gcr  = */ (9 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
+	},
+	/* [AO_SERIAL_SPEED_57600] = */ {
+		/* .baud = */ 59,
+		/* .gcr =  */ (11 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
+	},
+};
+
+void
+ao_serial_set_speed(uint8_t speed)
+{
+	ao_serial_drain();
+	if (speed > AO_SERIAL_SPEED_57600)
+		return;
+	U1UCR |= UxUCR_FLUSH;
+	U1BAUD = ao_serial_speeds[speed].baud;
+	U1GCR = ao_serial_speeds[speed].gcr;
+}
+
+void
+ao_serial_init(void)
+{
+#if HAS_SERIAL_1_ALT_1
+	/* Set up the USART pin assignment */
+	PERCFG = (PERCFG & ~PERCFG_U1CFG_ALT_MASK) | PERCFG_U1CFG_ALT_1;
+
+	P2DIR = (P2DIR & ~P2DIR_PRIP0_MASK) | P2DIR_PRIP0_USART1_USART0;
+
+	/* Make the USART pins be controlled by the USART */
+	P0SEL |= (1 << 5) | (1 << 4);
+#if HAS_SERIAL_1_HW_FLOW
+	P0SEL |= (1 << 3) | (1 << 2);
+#endif
+#else
+	/* Set up the USART pin assignment */
+	PERCFG = (PERCFG & ~PERCFG_U1CFG_ALT_MASK) | PERCFG_U1CFG_ALT_2;
+
+	P2SEL = (P2SEL & ~(P2SEL_PRI3P1_MASK | P2SEL_PRI2P1_MASK)) |
+		(P2SEL_PRI3P1_USART1 | P2SEL_PRI2P1_USART1);
+
+	/* Make the USART pins be controlled by the USART */
+	P1SEL |= (1 << 6) | (1 << 7);
+	P1SEL |= (1 << 5) | (1 << 4);
+#endif
+
+	/* UART mode with receiver enabled */
+	U1CSR = (UxCSR_MODE_UART | UxCSR_RE);
+
+	/* Pick a 4800 baud rate */
+	ao_serial_set_speed(AO_SERIAL_SPEED_4800);
+
+	/* Reasonable serial parameters */
+	U1UCR = (UxUCR_FLUSH |
+#if HAS_SERIAL_1_HW_FLOW
+		 UxUCR_FLOW_ENABLE |
+#else
+		 UxUCR_FLOW_DISABLE |
+#endif
+		 UxUCR_D9_EVEN_PARITY |
+		 UxUCR_BIT9_8_BITS |
+		 UxUCR_PARITY_DISABLE |
+		 UxUCR_SPB_1_STOP_BIT |
+		 UxUCR_STOP_HIGH |
+		 UxUCR_START_LOW);
+
+	IEN0 |= IEN0_URX1IE;
+	IEN2 |= IEN2_UTX1IE;
+}