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#include <stdint.h>
#include <memory.h>
#include "CH58x_common.h"
#include "../utils.h"
#include "../debug.h"
#define NOTI_EP_NUM (2)
#define DATA_EP_NUM (3)
#define ACM_IF_NUM (1)
#define USB_DESCTYPE_CS_INTERFACE 0x24
static __attribute__((aligned(4))) uint8_t noti_ep_buf[64 + 64];
static uint8_t *const noti_ep_out = noti_ep_buf;
static uint8_t *const noti_ep_in = noti_ep_buf + 64;
static __attribute__((aligned(4))) uint8_t data_ep_buf[64 + 64];
static uint8_t *const data_ep_out = data_ep_buf;
static uint8_t *const data_ep_in = data_ep_buf + 64;
static void (*on_write)(uint8_t *buf, uint16_t len);
/* CDC Communication interface */
static USB_ITF_DESCR acm_if_desc = {
.bLength = sizeof(USB_ITF_DESCR),
.bDescriptorType = USB_DESCR_TYP_INTERF,
.bInterfaceNumber = ACM_IF_NUM,
.bAlternateSetting = 0,
.bNumEndpoints = 3, // A Notification and RX/TX Endpoint
.bInterfaceClass = 0x02, /* Communications and CDC Control */
.bInterfaceSubClass = 2, /* ACM subclass */
.bInterfaceProtocol = 1, /* AT Command V.250 protocol */
.iInterface = 0 /* No string descriptor */
};
/* Header Functional descriptor */
static uint8_t header_func_desc[] = {
5, /* bLength */
USB_DESCTYPE_CS_INTERFACE, /* bDescriptortype */
0x00, /* bDescriptorsubtype, HEADER */
0x10, 0x01, /* bcdCDC */
};
/* ACM Functional descriptor */
static uint8_t acm_func_desc[] = {
4, /* bLength */
USB_DESCTYPE_CS_INTERFACE, /* bDescriptortype */
0x02, /* bDescriptorsubtype, ABSTRACT CONTROL MANAGEMENT */
0x02, /* bmCapabilities: Supports subset of ACM commands */
};
/* Call Management Functional descriptor */
static uint8_t callmgr_func_desc[] = {
4, /* bLength */
USB_DESCTYPE_CS_INTERFACE, /* bDescriptortype */
0x01, /* bDescriptorsubtype, CALL MANAGEMENT */
0x03, /* bmCapabilities, DIY */
};
/* Notification Endpoint descriptor */
static USB_ENDP_DESCR noti_ep_desc = {
.bLength = sizeof(USB_ENDP_DESCR),
.bDescriptorType = USB_DESCR_TYP_ENDP,
.bEndpointAddress = 0x80 | NOTI_EP_NUM, /* IN endpoint */
.bmAttributes = 0x03, /* Interrupt transfer */
.wMaxPacketSize = 64, /* bytes */
.bInterval = 0xff
};
/* Data TX Endpoint descriptor */
static USB_ENDP_DESCR tx_ep_desc = {
.bLength = sizeof(USB_ENDP_DESCR),
.bDescriptorType = USB_DESCR_TYP_ENDP,
.bEndpointAddress = 0x80 | DATA_EP_NUM, /* IN endpoint */
.bmAttributes = 0x02, /* Bulk */
.wMaxPacketSize = MAX_PACKET_SIZE, /* bytes */
.bInterval = 0xff
};
/* Data RX Endpoint descriptor */
static USB_ENDP_DESCR rx_ep_desc = {
.bLength = sizeof(USB_ENDP_DESCR),
.bDescriptorType = USB_DESCR_TYP_ENDP,
.bEndpointAddress = DATA_EP_NUM, /* OUT endpoint */
.bmAttributes = 0x02, /* Bulk */
.wMaxPacketSize = MAX_PACKET_SIZE, /* bytes */
.bInterval = 0xff
};
static void cdc_request_handler(USB_SETUP_REQ * request)
{
_TRACE();
// Handle CDC Class Request here
}
static void noti_ep_handler()
{
_TRACE();
// Handle Subclass Request here
}
static volatile uint16_t transferred;
static void data_ep_handler()
{
_TRACE();
static int tog;
uint8_t token = R8_USB_INT_ST & MASK_UIS_TOKEN;
switch(token) {
case UIS_TOKEN_OUT:
if (on_write)
on_write(data_ep_out, R8_USB_RX_LEN);
tog = !tog;
set_handshake(DATA_EP_NUM, USB_ACK, tog, 0);
break;
case UIS_TOKEN_IN:
if (transferred == 0) {
transferred = 1;
} else {
set_handshake(DATA_EP_NUM, USB_NAK, 1, 0);
}
break;
default:
break;
}
}
// In case we want to send something to the host,
// or want to see the log over ttyACMx
void cdc_fill_IN(uint8_t *buf, uint8_t len)
{
if (len > tx_ep_desc.wMaxPacketSize)
return;
static int tog;
memcpy(data_ep_in, buf, len);
set_handshake(DATA_EP_NUM, USB_ACK, tog, len);
tog = !tog;
transferred = 0;
}
static int wait_until_sent(uint16_t timeout_ms)
{
while(timeout_ms--) {
if (transferred) {
return 0;
}
DelayMs(1);
}
return -1;
}
int cdc_tx_poll(uint8_t *buf, int len, uint16_t timeout_ms)
{
int i = 0;
while (len > tx_ep_desc.wMaxPacketSize) {
cdc_fill_IN(buf + i, tx_ep_desc.wMaxPacketSize);
if (wait_until_sent(timeout_ms))
return -1;
i += tx_ep_desc.wMaxPacketSize;
len -= tx_ep_desc.wMaxPacketSize;
}
cdc_fill_IN(buf + i, len);
if (wait_until_sent(timeout_ms))
return -1;
return 0;
}
void cdc_onWrite(void (*cb)(uint8_t *buf, uint16_t len))
{
on_write = cb;
}
void cdc_acm_init()
{
cfg_desc_append(&acm_if_desc);
cfg_desc_append(header_func_desc);
cfg_desc_append(acm_func_desc);
cfg_desc_append(callmgr_func_desc);
cfg_desc_append(¬i_ep_desc);
cfg_desc_append(&rx_ep_desc);
cfg_desc_append(&tx_ep_desc);
if_cb_register(ACM_IF_NUM, cdc_request_handler);
ep_cb_register(NOTI_EP_NUM, noti_ep_handler);
ep_cb_register(DATA_EP_NUM, data_ep_handler);
dma_register(NOTI_EP_NUM, noti_ep_buf);
dma_register(DATA_EP_NUM, data_ep_buf);
}
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