*
* 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.
+ * 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
#include "ao.h"
-volatile __xdata struct ao_fifo ao_usart1_rx_fifo;
-volatile __xdata struct ao_fifo ao_usart1_tx_fifo;
+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_serial_rx1_isr(void) __interrupt 3
+ao_serial0_rx_isr(void) __interrupt 2
{
- 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
+ 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_serial_tx1_started;
+static __xdata uint8_t ao_serial0_tx_started;
static void
-ao_serial_tx1_start(void)
+ao_serial0_tx_start(void)
{
- if (!ao_fifo_empty(ao_usart1_tx_fifo) &&
- !ao_serial_tx1_started)
+ if (!ao_fifo_empty(ao_serial0_tx_fifo) &&
+ !ao_serial0_tx_started)
{
- ao_serial_tx1_started = 1;
- ao_fifo_remove(ao_usart1_tx_fifo, U1DBUF);
+ ao_serial0_tx_started = 1;
+ ao_fifo_remove(ao_serial0_tx_fifo, U0DBUF);
}
}
void
-ao_serial_tx1_isr(void) __interrupt 14
+ao_serial0_tx_isr(void) __interrupt 7
{
- UTX1IF = 0;
- ao_serial_tx1_started = 0;
- ao_serial_tx1_start();
- ao_wakeup(&ao_usart1_tx_fifo);
+ UTX0IF = 0;
+ ao_serial0_tx_started = 0;
+ ao_serial0_tx_start();
+ ao_wakeup(&ao_serial0_tx_fifo);
}
char
-ao_serial_getchar(void) __critical
+ao_serial0_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);
+ 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_STDIN
+#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_serial_pollchar(void) __critical
+ao_serial1_getchar(void) __critical
{
char c;
- if (ao_fifo_empty(ao_usart1_rx_fifo))
+ 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_usart1_rx_fifo,c);
+ 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_serial_putchar(char c) __critical
+ao_serial1_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();
+ 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_serial_drain(void) __critical
+ao_serial1_drain(void) __critical
{
- while (!ao_fifo_empty(ao_usart1_tx_fifo))
- ao_sleep(&ao_usart1_tx_fifo);
+ while (!ao_fifo_empty(ao_serial1_tx_fifo))
+ ao_sleep(&ao_serial1_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_serial1_set_speed(uint8_t speed)
{
- ao_serial_drain();
- if (speed > AO_SERIAL_SPEED_57600)
+ 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;
/* 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);
+ /* 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 */
/* Make the USART pins be controlled by the USART */
P1SEL |= (1 << 6) | (1 << 7);
- P1SEL |= (1 << 5) | (1 << 4);
+#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_serial_set_speed(AO_SERIAL_SPEED_4800);
+ ao_serial1_set_speed(AO_SERIAL_SPEED_4800);
/* Reasonable serial parameters */
U1UCR = (UxUCR_FLUSH |
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