+/* Teensyduino Core Library
+ * http://www.pjrc.com/teensy/
+ * Copyright (c) 2013 PJRC.COM, LLC.
+ * Modified by Jacob Alexander 2013-2015
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * 1. The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * 2. If the Software is incorporated into a build system that allows
+ * selection among a list of target devices, then similar target
+ * devices manufactured by PJRC.COM must be included in the list of
+ * target devices and selectable in the same manner.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
+ * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
+ * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+// ----- Includes -----
+
+// Compiler Includes
+#include <string.h> // For memcpy
+
+// Project Includes
+#include <Lib/OutputLib.h>
+
+// Local Includes
#include "usb_dev.h"
#include "usb_serial.h"
-#include <Lib/USBLib.h>
-// defined by usb_dev.h -> usb_desc.h
-#if defined(CDC_STATUS_INTERFACE) && defined(CDC_DATA_INTERFACE)
-uint8_t usb_cdc_line_coding[7];
-volatile uint8_t usb_cdc_line_rtsdtr=0;
-volatile uint8_t usb_cdc_transmit_flush_timer=0;
-static usb_packet_t *rx_packet=NULL;
-static usb_packet_t *tx_packet=NULL;
-static volatile uint8_t tx_noautoflush=0;
+// ----- Defines -----
-#define TRANSMIT_FLUSH_TIMEOUT 5 /* in milliseconds */
+#define TRANSMIT_FLUSH_TIMEOUT 5 /* in milliseconds */
-static void usb_serial_receive(void)
-{
- if (!usb_configuration) return;
- if (rx_packet) return;
- while (1) {
- rx_packet = usb_rx(CDC_RX_ENDPOINT);
- if (rx_packet == NULL) return;
- if (rx_packet->len > 0) return;
- usb_free(rx_packet);
- rx_packet = NULL;
- }
-}
+// Maximum number of transmit packets to queue so we don't starve other endpoints for memory
+#define TX_PACKET_LIMIT 8
+
+// When the PC isn't listening, how long do we wait before discarding data? If this is
+// too short, we risk losing data during the stalls that are common with ordinary desktop
+// software. If it's too long, we stall the user's program when no software is running.
+#define TX_TIMEOUT_MSEC 70
+
+#if F_CPU == 96000000
+ #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 596)
+#elif F_CPU == 72000000
+ #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 512) // XXX Correct?
+#elif F_CPU == 48000000
+ #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 428)
+#elif F_CPU == 24000000
+ #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 262)
+#endif
+
+
+
+// ----- Variables -----
+
+// serial port settings (baud rate, control signals, etc) set
+// by the PC. These are ignored, but kept in RAM.
+volatile uint8_t usb_cdc_line_coding[7] = { 0x00, 0xE1, 0x00, 0x00, 0x00, 0x00, 0x08 };
+volatile uint8_t usb_cdc_line_rtsdtr = 0;
+volatile uint8_t usb_cdc_transmit_flush_timer = 0;
+
+static usb_packet_t *rx_packet = NULL;
+static usb_packet_t *tx_packet = NULL;
+static volatile uint8_t tx_noautoflush = 0;
+
+// When we've suffered the transmit timeout, don't wait again until the computer
+// begins accepting data. If no software is running to receive, we'll just discard
+// data as rapidly as Serial.print() can generate it, until there's something to
+// actually receive it.
+static uint8_t transmit_previous_timeout = 0;
+
+
+
+// ----- Functions -----
// get the next character, or -1 if nothing received
-int usb_serial_getchar(void)
+int usb_serial_getchar()
{
unsigned int i;
int c;
- usb_serial_receive();
- if (!rx_packet) return -1;
+ if ( !rx_packet )
+ {
+ if ( !usb_configuration )
+ return -1;
+ rx_packet = usb_rx( CDC_RX_ENDPOINT );
+ if ( !rx_packet )
+ return -1;
+ }
i = rx_packet->index;
c = rx_packet->buf[i++];
- if (i >= rx_packet->len) {
- usb_free(rx_packet);
+ if ( i >= rx_packet->len )
+ {
+ usb_free( rx_packet );
rx_packet = NULL;
- } else {
+ }
+ else
+ {
rx_packet->index = i;
}
return c;
}
// peek at the next character, or -1 if nothing received
-int usb_serial_peekchar(void)
+int usb_serial_peekchar()
{
- usb_serial_receive();
- if (!rx_packet) return -1;
- return rx_packet->buf[rx_packet->index];
+ if ( !rx_packet )
+ {
+ if ( !usb_configuration )
+ return -1;
+ rx_packet = usb_rx( CDC_RX_ENDPOINT );
+ if ( !rx_packet )
+ return -1;
+ }
+ if ( !rx_packet )
+ return -1;
+ return rx_packet->buf[ rx_packet->index ];
}
// number of bytes available in the receive buffer
-int usb_serial_available(void)
+int usb_serial_available()
{
- int count=0;
+ int count = usb_rx_byte_count( CDC_RX_ENDPOINT );
+ if ( rx_packet )
+ count += rx_packet->len - rx_packet->index;
+ return count;
+}
+
+// read a block of bytes to a buffer
+int usb_serial_read( void *buffer, uint32_t size )
+{
+ uint8_t *p = (uint8_t *)buffer;
+ uint32_t qty, count=0;
- if (usb_configuration) {
- count = usb_rx_byte_count(CDC_RX_ENDPOINT);
+ while ( size )
+ {
+ if ( !usb_configuration )
+ break;
+ if ( !rx_packet )
+ {
+ rx:
+ rx_packet = usb_rx(CDC_RX_ENDPOINT);
+ if ( !rx_packet )
+ break;
+ if ( rx_packet->len == 0 )
+ {
+ usb_free(rx_packet);
+ goto rx;
+ }
+ }
+ qty = rx_packet->len - rx_packet->index;
+ if ( qty > size )
+ qty = size;
+ memcpy( p, rx_packet->buf + rx_packet->index, qty );
+ p += qty;
+ count += qty;
+ size -= qty;
+ rx_packet->index += qty;
+ if ( rx_packet->index >= rx_packet->len )
+ {
+ usb_free( rx_packet );
+ rx_packet = NULL;
+ }
}
- if (rx_packet) count += rx_packet->len - rx_packet->index;
return count;
}
// discard any buffered input
-void usb_serial_flush_input(void)
+void usb_serial_flush_input()
{
usb_packet_t *rx;
- if (!usb_configuration) return;
- if (rx_packet) {
- usb_free(rx_packet);
+ if ( !usb_configuration )
+ return;
+ if ( rx_packet )
+ {
+ usb_free( rx_packet );
rx_packet = NULL;
}
- while (1) {
- rx = usb_rx(CDC_RX_ENDPOINT);
- if (!rx) break;
- usb_free(rx);
+ while (1)
+ {
+ rx = usb_rx( CDC_RX_ENDPOINT );
+ if ( !rx )
+ break;
+ usb_free( rx );
}
}
-// Maximum number of transmit packets to queue so we don't starve other endpoints for memory
-#define TX_PACKET_LIMIT 8
-
-// When the PC isn't listening, how long do we wait before discarding data? If this is
-// too short, we risk losing data during the stalls that are common with ordinary desktop
-// software. If it's too long, we stall the user's program when no software is running.
-#define TX_TIMEOUT_MSEC 70
-
-#if F_CPU == 96000000
- #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 596)
-#elif F_CPU == 48000000
- #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 428)
-#elif F_CPU == 24000000
- #define TX_TIMEOUT (TX_TIMEOUT_MSEC * 262)
-#endif
-
-// When we've suffered the transmit timeout, don't wait again until the computer
-// begins accepting data. If no software is running to receive, we'll just discard
-// data as rapidly as Serial.print() can generate it, until there's something to
-// actually receive it.
-static uint8_t transmit_previous_timeout=0;
-
-
// transmit a character. 0 returned on success, -1 on error
-int usb_serial_putchar(uint8_t c)
+int usb_serial_putchar( uint8_t c )
{
-#if 1
- return usb_serial_write(&c, 1);
-#endif
-#if 0
- uint32_t wait_count;
-
- tx_noautoflush = 1;
- if (!tx_packet) {
- wait_count = 0;
- while (1) {
- if (!usb_configuration) {
- tx_noautoflush = 0;
- return -1;
- }
- if (usb_tx_packet_count(CDC_TX_ENDPOINT) < TX_PACKET_LIMIT) {
- tx_noautoflush = 1;
- tx_packet = usb_malloc();
- if (tx_packet) break;
- tx_noautoflush = 0;
- }
- if (++wait_count > TX_TIMEOUT || transmit_previous_timeout) {
- transmit_previous_timeout = 1;
- return -1;
- }
- }
- }
- transmit_previous_timeout = 0;
- tx_packet->buf[tx_packet->index++] = c;
- if (tx_packet->index < CDC_TX_SIZE) {
- usb_cdc_transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
- } else {
- tx_packet->len = CDC_TX_SIZE;
- usb_cdc_transmit_flush_timer = 0;
- usb_tx(CDC_TX_ENDPOINT, tx_packet);
- tx_packet = NULL;
- }
- tx_noautoflush = 0;
- return 0;
-#endif
+ return usb_serial_write( &c, 1 );
}
-
-int usb_serial_write(const void *buffer, uint32_t size)
+int usb_serial_write( const void *buffer, uint32_t size )
{
-#if 1
uint32_t len;
uint32_t wait_count;
const uint8_t *src = (const uint8_t *)buffer;
uint8_t *dest;
tx_noautoflush = 1;
- while (size > 0) {
- if (!tx_packet) {
+ while ( size > 0 )
+ {
+ if ( !tx_packet )
+ {
wait_count = 0;
- while (1) {
- if (!usb_configuration) {
+ while ( 1 )
+ {
+ if ( !usb_configuration )
+ {
tx_noautoflush = 0;
return -1;
}
- if (usb_tx_packet_count(CDC_TX_ENDPOINT) < TX_PACKET_LIMIT) {
+ if ( usb_tx_packet_count( CDC_TX_ENDPOINT ) < TX_PACKET_LIMIT )
+ {
tx_noautoflush = 1;
tx_packet = usb_malloc();
- if (tx_packet) break;
+ if ( tx_packet )
+ break;
tx_noautoflush = 0;
}
- if (++wait_count > TX_TIMEOUT || transmit_previous_timeout) {
+ if ( ++wait_count > TX_TIMEOUT || transmit_previous_timeout )
+ {
transmit_previous_timeout = 1;
return -1;
}
}
transmit_previous_timeout = 0;
len = CDC_TX_SIZE - tx_packet->index;
- if (len > size) len = size;
+ if ( len > size )
+ len = size;
dest = tx_packet->buf + tx_packet->index;
tx_packet->index += len;
size -= len;
- while (len-- > 0) *dest++ = *src++;
- if (tx_packet->index < CDC_TX_SIZE) {
- usb_cdc_transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
- } else {
+ while ( len-- > 0 )
+ *dest++ = *src++;
+ if ( tx_packet->index >= CDC_TX_SIZE )
+ {
tx_packet->len = CDC_TX_SIZE;
- usb_cdc_transmit_flush_timer = 0;
- usb_tx(CDC_TX_ENDPOINT, tx_packet);
+ usb_tx( CDC_TX_ENDPOINT, tx_packet );
tx_packet = NULL;
}
+ usb_cdc_transmit_flush_timer = TRANSMIT_FLUSH_TIMEOUT;
}
tx_noautoflush = 0;
return 0;
-#endif
-#if 0
- const uint8_t *p = (const uint8_t *)buffer;
- int r;
-
- while (size) {
- r = usb_serial_putchar(*p++);
- if (r < 0) return -1;
- size--;
- }
- return 0;
-#endif
}
-void usb_serial_flush_output(void)
+void usb_serial_flush_output()
{
- if (!usb_configuration) return;
- //serial_print("usb_serial_flush_output\n");
- if (tx_packet && tx_packet->index > 0) {
+ if ( !usb_configuration )
+ return;
+ tx_noautoflush = 1;
+ if ( tx_packet )
+ {
usb_cdc_transmit_flush_timer = 0;
tx_packet->len = tx_packet->index;
- usb_tx(CDC_TX_ENDPOINT, tx_packet);
+ usb_tx( CDC_TX_ENDPOINT, tx_packet );
tx_packet = NULL;
}
- // while (usb_tx_byte_count(CDC_TX_ENDPOINT) > 0) ; // wait
+ else
+ {
+ usb_packet_t *tx = usb_malloc();
+ if ( tx )
+ {
+ usb_cdc_transmit_flush_timer = 0;
+ usb_tx( CDC_TX_ENDPOINT, tx );
+ }
+ else
+ {
+ usb_cdc_transmit_flush_timer = 1;
+ }
+ }
+ tx_noautoflush = 0;
}
-void usb_serial_flush_callback(void)
+void usb_serial_flush_callback()
{
- if (tx_noautoflush) return;
- //serial_print("usb_flush_callback \n");
- tx_packet->len = tx_packet->index;
- usb_tx(CDC_TX_ENDPOINT, tx_packet);
- tx_packet = NULL;
- //serial_print("usb_flush_callback end\n");
+ if ( tx_noautoflush )
+ return;
+ if ( tx_packet )
+ {
+ tx_packet->len = tx_packet->index;
+ usb_tx( CDC_TX_ENDPOINT, tx_packet );
+ tx_packet = NULL;
+ } else {
+ usb_packet_t *tx = usb_malloc();
+ if ( tx )
+ {
+ usb_tx( CDC_TX_ENDPOINT, tx );
+ }
+ else
+ {
+ usb_cdc_transmit_flush_timer = 1;
+ }
+ }
}
-#endif // CDC_STATUS_INTERFACE && CDC_DATA_INTERFACE
-
projects / kiibohd-controller.git / blobdiff