X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=Output%2FpjrcUSB%2Farm%2Fusb_serial.c;h=4510d404f323bd039972166ad51665fec3e82b96;hb=1acbc97e98d8388332c51260017ab23227a91339;hp=a67448855cb4c5f633c4d0833625a4aa2ff1be4d;hpb=59f13f8f4f9d54b14dfd7ffce23fd8e8cc1a486a;p=kiibohd-controller.git diff --git a/Output/pjrcUSB/arm/usb_serial.c b/Output/pjrcUSB/arm/usb_serial.c index a674488..4510d40 100644 --- a/Output/pjrcUSB/arm/usb_serial.c +++ b/Output/pjrcUSB/arm/usb_serial.c @@ -1,181 +1,243 @@ +/* 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 // For memcpy + +// Project Includes +#include + +// Local Includes #include "usb_dev.h" #include "usb_serial.h" -#include -// 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; } @@ -184,58 +246,72 @@ int usb_serial_write(const void *buffer, uint32_t size) } 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 -