+++ /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; either version 2 of the License, or
- * (at your option) any later version.
- *
- * 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"
-
-const __code struct ao_serial_speed 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
- },
- /* [AO_SERIAL_SPEED_115200] = */ {
- /* .baud = */ 59,
- /* .gcr = */ (12 << UxGCR_BAUD_E_SHIFT) | UxGCR_ORDER_LSB
- },
-};
-
-#define AO_SERIAL_SPEED_MAX AO_SERIAL_SPEED_115200
-
-#if HAS_SERIAL_1_ALT_1
-#define SERIAL_1_RTS P0_3
-#else
-#define SERIAL_1_RTS P1_5
-#endif
-
-#if HAS_SERIAL_0_ALT_1
-#define SERIAL_0_RTS P0_5
-#else
-#define SERIAL_0_RTS P1_3
-#endif
-
-#if HAS_SERIAL_0
-
-volatile __xdata struct ao_fifo ao_serial0_rx_fifo;
-volatile __xdata struct ao_fifo ao_serial0_tx_fifo;
-
-void
-ao_serial0_rx_isr(void) __interrupt 2
-{
- if (!ao_fifo_full(ao_serial0_rx_fifo))
- ao_fifo_insert(ao_serial0_rx_fifo, U0DBUF);
- ao_wakeup(&ao_serial0_rx_fifo);
-#if USE_SERIAL_0_STDIN
- ao_wakeup(&ao_stdin_ready);
-#endif
-#if HAS_SERIAL_0_HW_FLOW
- if (ao_fifo_mostly(ao_serial0_rx_fifo))
- SERIAL_0_RTS = 1;
-#endif
-}
-
-static __xdata uint8_t ao_serial0_tx_started;
-
-static void
-ao_serial0_tx_start(void)
-{
- if (!ao_fifo_empty(ao_serial0_tx_fifo) &&
- !ao_serial0_tx_started)
- {
- ao_serial0_tx_started = 1;
- ao_fifo_remove(ao_serial0_tx_fifo, U0DBUF);
- }
-}
-
-void
-ao_serial0_tx_isr(void) __interrupt 7
-{
- UTX0IF = 0;
- ao_serial0_tx_started = 0;
- ao_serial0_tx_start();
- ao_wakeup(&ao_serial0_tx_fifo);
-}
-
-char
-ao_serial0_getchar(void) __critical
-{
- char c;
- while (ao_fifo_empty(ao_serial0_rx_fifo))
- ao_sleep(&ao_serial0_rx_fifo);
- ao_fifo_remove(ao_serial0_rx_fifo, c);
-#if HAS_SERIAL_0_HW_FLOW
- if (ao_fifo_barely(ao_serial0_rx_fifo))
- SERIAL_0_RTS = 0;
-#endif
- return c;
-}
-
-#if USE_SERIAL_0_STDIN
-int
-_ao_serial0_pollchar(void)
-{
- uint8_t c;
- if (ao_fifo_empty(ao_serial0_rx_fifo))
- return AO_READ_AGAIN;
- ao_fifo_remove(ao_serial0_rx_fifo,c);
-#if HAS_SERIAL_0_HW_FLOW
- if (ao_fifo_barely(ao_serial0_rx_fifo))
- SERIAL_0_RTS = 0;
-#endif
- return c;
-}
-#endif
-
-void
-ao_serial0_putchar(char c) __critical
-{
- while (ao_fifo_full(ao_serial0_tx_fifo))
- ao_sleep(&ao_serial0_tx_fifo);
- ao_fifo_insert(ao_serial0_tx_fifo, c);
- ao_serial0_tx_start();
-}
-
-void
-ao_serial0_drain(void) __critical
-{
- while (!ao_fifo_empty(ao_serial0_tx_fifo))
- ao_sleep(&ao_serial0_tx_fifo);
-}
-
-void
-ao_serial0_set_speed(uint8_t speed)
-{
- ao_serial0_drain();
- if (speed > AO_SERIAL_SPEED_MAX)
- return;
- U0UCR |= UxUCR_FLUSH;
- U0BAUD = ao_serial_speeds[speed].baud;
- U0GCR = ao_serial_speeds[speed].gcr;
-}
-#endif /* HAS_SERIAL_0 */
-
-#if HAS_SERIAL_1
-
-volatile __xdata struct ao_fifo ao_serial1_rx_fifo;
-volatile __xdata struct ao_fifo ao_serial1_tx_fifo;
-
-void
-ao_serial1_rx_isr(void) __interrupt 3
-{
- if (!ao_fifo_full(ao_serial1_rx_fifo))
- ao_fifo_insert(ao_serial1_rx_fifo, U1DBUF);
- ao_wakeup(&ao_serial1_rx_fifo);
-#if USE_SERIAL_1_STDIN
- ao_wakeup(&ao_stdin_ready);
-#endif
-#if HAS_SERIAL_1_HW_FLOW
- if (ao_fifo_mostly(ao_serial1_rx_fifo))
- SERIAL_1_RTS = 1;
-#endif
-}
-
-static __xdata uint8_t ao_serial1_tx_started;
-
-static void
-ao_serial1_tx_start(void)
-{
- if (!ao_fifo_empty(ao_serial1_tx_fifo) &&
- !ao_serial1_tx_started)
- {
- ao_serial1_tx_started = 1;
- ao_fifo_remove(ao_serial1_tx_fifo, U1DBUF);
- }
-}
-
-void
-ao_serial1_tx_isr(void) __interrupt 14
-{
- UTX1IF = 0;
- ao_serial1_tx_started = 0;
- ao_serial1_tx_start();
- ao_wakeup(&ao_serial1_tx_fifo);
-}
-
-char
-ao_serial1_getchar(void) __critical
-{
- char c;
- while (ao_fifo_empty(ao_serial1_rx_fifo))
- ao_sleep(&ao_serial1_rx_fifo);
- ao_fifo_remove(ao_serial1_rx_fifo, c);
-#if HAS_SERIAL_1_HW_FLOW
- if (ao_fifo_barely(ao_serial1_rx_fifo))
- SERIAL_1_RTS = 0;
-#endif
- return c;
-}
-
-#if USE_SERIAL_1_STDIN
-int
-_ao_serial1_pollchar(void)
-{
- uint8_t c;
- if (ao_fifo_empty(ao_serial1_rx_fifo))
- return AO_READ_AGAIN;
- ao_fifo_remove(ao_serial1_rx_fifo,c);
-#if HAS_SERIAL_1_HW_FLOW
- if (ao_fifo_barely(ao_serial1_rx_fifo))
- SERIAL_1_RTS = 0;
-#endif
- return c;
-}
-#endif
-
-void
-ao_serial1_putchar(char c) __critical
-{
- while (ao_fifo_full(ao_serial1_tx_fifo))
- ao_sleep(&ao_serial1_tx_fifo);
- ao_fifo_insert(ao_serial1_tx_fifo, c);
- ao_serial1_tx_start();
-}
-
-void
-ao_serial1_drain(void) __critical
-{
- while (!ao_fifo_empty(ao_serial1_tx_fifo))
- ao_sleep(&ao_serial1_tx_fifo);
-}
-
-void
-ao_serial1_set_speed(uint8_t speed)
-{
- ao_serial1_drain();
- if (speed > AO_SERIAL_SPEED_MAX)
- return;
- U1UCR |= UxUCR_FLUSH;
- U1BAUD = ao_serial_speeds[speed].baud;
- U1GCR = ao_serial_speeds[speed].gcr;
-}
-
-#endif /* HAS_SERIAL_1 */
-
-void
-ao_serial_init(void)
-{
-#if HAS_SERIAL_0
-#if HAS_SERIAL_0_ALT_1
- /* Set up the USART pin assignment */
- PERCFG = (PERCFG & ~PERCFG_U0CFG_ALT_MASK) | PERCFG_U0CFG_ALT_1;
-
- P2DIR = (P2DIR & ~P2DIR_PRIP0_MASK) | P2DIR_PRIP0_USART0_USART1;
-
- /* Make the USART pins be controlled by the USART */
- P0SEL |= (1 << 2) | (1 << 3);
-#if HAS_SERIAL_0_HW_FLOW
- SERIAL_0_RTS = 0;
- P0DIR |= (1 << 5);
-
- P0SEL |= (1 << 4);
- P0INP |= (1 << 4);
-#endif
-#else
- /* Set up the USART pin assignment */
- PERCFG = (PERCFG & ~PERCFG_U0CFG_ALT_MASK) | PERCFG_U0CFG_ALT_2;
-
- P2SEL = (P2SEL & ~(P2SEL_PRI3P1_MASK | P2SEL_PRI0P1_MASK)) |
- (P2SEL_PRI3P1_USART0 | P2SEL_PRI0P1_USART0);
-
- /* Make the USART pins be controlled by the USART */
- P1SEL |= (1 << 5) | (1 << 4);
-#if HAS_SERIAL_0_HW_FLOW
- SERIAL_0_RTS = 0;
- P1DIR |= (1 << 3);
-
- P1SEL |= (1 << 2);
- P1INP |= (1 << 2);
-#endif
-#endif
-
- /* UART mode with receiver enabled */
- U0CSR = (UxCSR_MODE_UART | UxCSR_RE);
-
- /* Pick a 9600 baud rate */
- ao_serial0_set_speed(AO_SERIAL_SPEED_9600);
-
- /* Reasonable serial parameters */
- U0UCR = (UxUCR_FLUSH |
-#if HAS_SERIAL_0_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_URX0IE;
- IEN2 |= IEN2_UTX0IE;
-#if USE_SERIAL_0_STDIN && !DELAY_SERIAL_0_STDIN
- ao_add_stdio(_ao_serial0_pollchar,
- ao_serial0_putchar,
- NULL);
-#endif
-#endif /* HAS_SERIAL_0 */
-
-#if HAS_SERIAL_1
-#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
- /* SW RTS control (hw doesn't work) */
- SERIAL_1_RTS = 0;
- P0DIR |= 1 << 3;
-
- /* HW CTS. Maybe this works? */
- P0SEL |= 1 << 2;
- P0INP |= 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);
-#if HAS_SERIAL_1_HW_FLOW
- /* SW RTS control (hw doesn't work) */
- SERIAL_1_RTS = 0;
- P1DIR |= (1 << 5);
-
- /* HW CTS. Maybe this works? */
- P1SEL |= (1 << 4);
- P1INP |= (1 << 4);
-#endif
-#endif
-
- /* UART mode with receiver enabled */
- U1CSR = (UxCSR_MODE_UART | UxCSR_RE);
-
- /* Pick a 4800 baud rate */
- ao_serial1_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;
-
-#if USE_SERIAL_1_STDIN && !DELAY_SERIAL_1_STDIN
- ao_add_stdio(_ao_serial1_pollchar,
- ao_serial1_putchar,
- NULL);
-#endif
-#endif /* HAS_SERIAL_1 */
-}
projects / fw / altos / blobdiff