X-Git-Url: https://git.gag.com/?a=blobdiff_plain;ds=sidebyside;f=src%2Flpc%2Fao_serial_lpc.c;fp=src%2Flpc%2Fao_serial_lpc.c;h=e47f743eec43ff9b73e751f226b256d06f9f81be;hb=bcc65597d3d20f1d58df784100af766cee5f0f20;hp=0000000000000000000000000000000000000000;hpb=6735a391c2a1e3be01ac9e68b44ec0974592c11c;p=fw%2Faltos

diff --git a/src/lpc/ao_serial_lpc.c b/src/lpc/ao_serial_lpc.c
new file mode 100644
index 00000000..e47f743e
--- /dev/null
+++ b/src/lpc/ao_serial_lpc.c
@@ -0,0 +1,154 @@
+/*
+ * Copyright © 2013 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>
+#include <ao_serial.h>
+
+struct ao_fifo	ao_usart_rx_fifo;
+struct ao_fifo	ao_usart_tx_fifo;
+uint8_t		ao_usart_tx_started;
+
+void
+ao_debug_out(char c)
+{
+	if (c == '\n')
+		ao_debug_out('\r');
+#if 0
+	while (!(stm_usart1.sr & (1 << STM_USART_SR_TXE)));
+	stm_usart1.dr = c;
+#endif
+}
+
+static void
+_ao_serial_tx_start(void)
+{
+	if (!ao_fifo_empty(ao_usart_tx_fifo) & !ao_usart_tx_started)
+	{
+		ao_usart_tx_started = 1;
+#if 0
+		ao_fifo_remove(ao_usart_tx_fifo, usart->reg->dr);
+#endif
+	}
+}
+
+void
+lpc_usart_isr(void)
+{
+#if 0
+	uint32_t	sr;
+
+	sr = usart->reg->sr;
+	usart->reg->sr = 0;
+
+	if (sr & (1 << STM_USART_SR_RXNE)) {
+		char c = usart->reg->dr;
+		if (!ao_fifo_full(ao_usart_rx_fifo))
+			ao_fifo_insert(ao_usart_rx_fifo, c);
+		ao_wakeup(ao_usart_rx_fifo);
+		if (stdin)
+			ao_wakeup(&ao_stdin_ready);
+	}
+	if (sr & (1 << STM_USART_SR_TC)) {
+		ao_usart_tx_started = 0;
+		_ao_usart_tx_start(usart);
+		ao_wakeup(ao_usart_tx_fifo);
+	}
+#endif
+}
+
+int
+_ao_serial_pollchar(void)
+{
+	int	c;
+	
+	if (ao_fifo_empty(ao_usart_rx_fifo))
+		c = AO_READ_AGAIN;
+	else {
+		uint8_t	u;
+		ao_fifo_remove(ao_usart_rx_fifo,u);
+		c = u;
+	}
+	return c;
+}
+
+char
+ao_serial_getchar(void)
+{
+	int c;
+	ao_arch_block_interrupts();
+	while ((c = _ao_serial_pollchar()) == AO_READ_AGAIN)
+		ao_sleep(&ao_usart_rx_fifo);
+	ao_arch_release_interrupts();
+	return (char) c;
+}
+
+void
+ao_serial_putchar(char c)
+{
+	ao_arch_block_interrupts();
+	while (ao_fifo_full(ao_usart_tx_fifo))
+		ao_sleep(&ao_usart_tx_fifo);
+	ao_fifo_insert(ao_usart_tx_fifo, c);
+	_ao_serial_tx_start();
+	ao_arch_release_interrupts();
+}
+
+void
+ao_serial_drain(void)
+{
+	ao_arch_block_interrupts();
+	while (!ao_fifo_empty(ao_usart_tx_fifo))
+		ao_sleep(&ao_usart_tx_fifo);
+	ao_arch_release_interrupts();
+}
+
+void
+ao_serial_set_speed(uint8_t speed)
+{
+	if (speed > AO_SERIAL_SPEED_115200)
+		return;
+#if 0
+	usart->reg->brr = ao_usart_speeds[speed].brr;
+#endif
+}
+
+#include "ao_serial_lpc.h"
+
+void
+ao_serial_init(void)
+{
+	/* Turn on the USART clock */
+	lpc_scb.uartclkdiv = 1;
+
+#if SERIAL_0_18_19
+	lpc_ioconf.pio0_18 = ((LPC_IOCONF_FUNC_PIO0_18_RXD << LPC_IOCONF_FUNC) |
+			      (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) |
+			      (0 << LPC_IOCONF_HYS) |
+			      (0 << LPC_IOCONF_INV) |
+			      (0 << LPC_IOCONF_OD));
+	lpc_ioconf.pio0_19 = ((LPC_IOCONF_FUNC_PIO0_19_TXD << LPC_IOCONF_FUNC) |
+			      (LPC_IOCONF_MODE_INACTIVE << LPC_IOCONF_MODE) |
+			      (0 << LPC_IOCONF_HYS) |
+			      (0 << LPC_IOCONF_INV) |
+			      (0 << LPC_IOCONF_OD));
+#endif
+
+	/* Turn on the USART */
+	lpc_scb.sysahbclkctrl |= (1 << LPC_SCB_SYSAHBCLKCTRL_USART);
+}
+
+