+++ /dev/null
-/*
- * 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);
-}
-
-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;
-}
-
-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();
-}
-
-static void
-send_serial(void)
-{
- ao_cmd_white();
- while (ao_cmd_lex_c != '\n') {
- ao_serial_putchar(ao_cmd_lex_c);
- ao_cmd_lex();
- }
-}
-
-__code struct ao_cmds ao_serial_cmds[] = {
- { 'S', send_serial, "S <data> Send data to serial line" },
- { 0, send_serial, NULL },
-};
-
-void
-ao_serial_init(void)
-{
- /* Set up the USART pin assignment */
- PERCFG = (PERCFG & ~PERCFG_U1CFG_ALT_MASK) | PERCFG_U1CFG_ALT_2;
-
- /* ee has already set the P2SEL bits */
-
- /* Make the USART pins be controlled by the USART */
- P1SEL |= (1 << 6) | (1 << 7);
-
- /* UART mode with receiver enabled */
- U1CSR = (UxCSR_MODE_UART | UxCSR_RE);
-
- /* Pick a 4800 baud rate */
- U1BAUD = 163; /* 4800 */
- U1GCR = 7 << UxGCR_BAUD_E_SHIFT; /* 4800 */
-
- /* Reasonable serial parameters */
- U1UCR = (UxUCR_FLUSH |
- UxUCR_FLOW_DISABLE |
- UxUCR_D9_ODD_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;
-
- ao_cmd_register(&ao_serial_cmds[0]);
-}