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Try to support multiple serial lines.

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This commit is contained in:
NIIBE Yutaka
2017-12-14 10:16:53 +09:00
parent 2c14f21b20
commit de9eb6f1e7
1 changed files with 64 additions and 58 deletions
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120
example-usb-serial/usb-cdc.c
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@@ -5,8 +5,6 @@
#include "usb_lld.h"
#include "tty.h"
static chopstx_intr_t usb_intr;
struct line_coding
{
uint32_t bitrate;
@@ -15,30 +13,15 @@ struct line_coding
uint8_t datatype;
} __attribute__((packed));
static const struct line_coding line_coding0 = {
static const struct line_coding lc_default = {
115200, /* baud rate: 115200 */
0x00, /* stop bits: 1 */
0x00, /* parity: none */
0x08 /* bits: 8 */
};
/*
* Currently, we only support a single TTY.
*
* It is possible to extend to support multiple TTYs, for multiple
* interfaces.
*
* In that case, add argument to TTY_OPEN function and
* modify TTY_GET function to get the TTY structure. Functions which
* directy accesses TTY0 (usb_device_reset and usb_set_configuration)
* should be modified, too.
*
* Modification of TTY_MAIN thread will be also needed to echo back
* input for each TTY, and the thread should run if one of TTY is
* opened.
*/
struct tty {
chopstx_intr_t intr;
chopstx_mutex_t mtx;
chopstx_cond_t cnd;
uint8_t inputline[LINEBUFSIZE]; /* Line editing is supported */
@@ -54,7 +37,27 @@ struct tty {
struct line_coding line_coding;
};
static struct tty tty0;
#define MAX_TTY 2
static struct tty tty[MAX_TTY];
#define STACK_PROCESS_3
#define STACK_PROCESS_4
#include "stack-def.h"
#define STACK_ADDR_TTY0 ((uintptr_t)process3_base)
#define STACK_SIZE_TTY0 (sizeof process3_base)
#define STACK_ADDR_TTY1 ((uintptr_t)process4_base)
#define STACK_SIZE_TTY1 (sizeof process4_base)
struct tty_table {
struct tty *tty;
uintptr_t stack_addr;
size_t stack_size;
};
static const struct tty_table tty_table[MAX_TTY] = {
{ &tty[0], STACK_ADDR_TTY0, STACK_SIZE_TTY0 },
{ &tty[1], STACK_ADDR_TTY1, STACK_SIZE_TTY1 },
};
/*
* Locate TTY structure from interface number or endpoint number.
@@ -242,15 +245,15 @@ usb_device_reset (struct usb_dev *dev)
/* Initialize Endpoint 0 */
usb_lld_setup_endpoint (ENDP0, EP_CONTROL, 0, ENDP0_RXADDR, ENDP0_TXADDR, 64);
chopstx_mutex_lock (&tty0.mtx);
tty0.inputline_len = 0;
tty0.send_head = tty0.send_tail = 0;
tty0.flag_connected = 0;
tty0.flag_send_ready = 1;
tty0.flag_input_avail = 0;
tty0.device_state = USB_DEVICE_STATE_ATTACHED;
memcpy (&tty0.line_coding, &line_coding0, sizeof (struct line_coding));
chopstx_mutex_unlock (&tty0.mtx);
chopstx_mutex_lock (&tty->mtx);
tty->inputline_len = 0;
tty->send_head = tty->send_tail = 0;
tty->flag_connected = 0;
tty->flag_send_ready = 1;
tty->flag_input_avail = 0;
tty->device_state = USB_DEVICE_STATE_ATTACHED;
memcpy (&tty->line_coding, &line_coding0, sizeof (struct line_coding));
chopstx_mutex_unlock (&tty->mtx);
}
@@ -416,10 +419,10 @@ usb_set_configuration (struct usb_dev *dev)
usb_lld_set_configuration (dev, 1);
for (i = 0; i < NUM_INTERFACES; i++)
vcom_setup_endpoints_for_interface (i, 0);
chopstx_mutex_lock (&tty0.mtx);
tty0.device_state = USB_DEVICE_STATE_CONFIGURED;
chopstx_cond_signal (&tty0.cnd);
chopstx_mutex_unlock (&tty0.mtx);
chopstx_mutex_lock (&tty->mtx);
tty->device_state = USB_DEVICE_STATE_CONFIGURED;
chopstx_cond_signal (&tty->cnd);
chopstx_mutex_unlock (&tty->mtx);
}
else if (current_conf != dev->dev_req.value)
{
@@ -429,10 +432,10 @@ usb_set_configuration (struct usb_dev *dev)
usb_lld_set_configuration (dev, 0);
for (i = 0; i < NUM_INTERFACES; i++)
vcom_setup_endpoints_for_interface (i, 1);
chopstx_mutex_lock (&tty0.mtx);
tty0.device_state = USB_DEVICE_STATE_ADDRESSED;
chopstx_cond_signal (&tty0.cnd);
chopstx_mutex_unlock (&tty0.mtx);
chopstx_mutex_lock (&tty->mtx);
tty->device_state = USB_DEVICE_STATE_ADDRESSED;
chopstx_cond_signal (&tty->cnd);
chopstx_mutex_unlock (&tty->mtx);
}
usb_lld_ctrl_ack (dev);
@@ -641,26 +644,29 @@ static void *tty_main (void *arg);
#define PRIO_TTY 4
#define STACK_PROCESS_3
#include "stack-def.h"
#define STACK_ADDR_TTY ((uint32_t)process3_base)
#define STACK_SIZE_TTY (sizeof process3_base)
struct tty *
tty_open (void)
tty_open (uint8_t tty_num)
{
chopstx_mutex_init (&tty0.mtx);
chopstx_cond_init (&tty0.cnd);
tty0.inputline_len = 0;
tty0.send_head = tty0.send_tail = 0;
tty0.flag_connected = 0;
tty0.flag_send_ready = 1;
tty0.flag_input_avail = 0;
tty0.device_state = USB_DEVICE_STATE_UNCONNECTED;
memcpy (&tty0.line_coding, &line_coding0, sizeof (struct line_coding));
struct tty *tty;
chopstx_create (PRIO_TTY, STACK_ADDR_TTY, STACK_SIZE_TTY, tty_main, &tty0);
return &tty0;
if (tty_num >= MAX_TTY)
return NULL;
tty = &tty_table[tty_num];
chopstx_mutex_init (&tty->mtx);
chopstx_cond_init (&tty->cnd);
tty->inputline_len = 0;
tty->send_head = tty->send_tail = 0;
tty->flag_connected = 0;
tty->flag_send_ready = 1;
tty->flag_input_avail = 0;
tty->device_state = USB_DEVICE_STATE_UNCONNECTED;
memcpy (&tty->line_coding, &lc_default, sizeof (struct line_coding));
chopstx_create (PRIO_TTY, STACK_ADDR_TTY, STACK_SIZE_TTY, tty_main, tty);
return tty;
}
@@ -742,10 +748,10 @@ tty_main (void *arg)
* device. Usually, just "continue" as EVENT_OK is
* OK.
*/
chopstx_mutex_lock (&tty0.mtx);
tty0.device_state = USB_DEVICE_STATE_ADDRESSED;
chopstx_cond_signal (&tty0.cnd);
chopstx_mutex_unlock (&tty0.mtx);
chopstx_mutex_lock (&tty->mtx);
tty->device_state = USB_DEVICE_STATE_ADDRESSED;
chopstx_cond_signal (&tty->cnd);
chopstx_mutex_unlock (&tty->mtx);
continue;
case USB_EVENT_GET_DESCRIPTOR: