cdcacm.c

/**
 * 
 * epicardium-specific implemnetation of cdcacm device
 * services CDCACM API
 */

#include "usb/epc_usb.h"
#include "usb/cdcacm.h"
#include "usb/descriptors.h"

#include <stdio.h>
#include <stddef.h>
#include <errno.h>

#include "usb.h"
#include "usb_event.h"
#include "cdc_acm.h"

#include "modules/log.h"
#include "modules/modules.h"

#include "FreeRTOS.h"
#include "task.h"

static volatile int lockup_disable = 0;

static inline struct config_descriptor_cdcacm *
descriptors(struct esb_config *self)
{
	return self->descriptors->cdcacm;
}

/******************************************************************************/
static volatile int usb_read_complete; // SWYM: only ever written to
static int cb_acm_read_ready(void)
{
	usb_read_complete = 1;
	return 0;
}

static int cb_acm_connected(void)
{
	lockup_disable = 0;
	return 0;
}

int esb_cdc_init(struct esb_config *self)
{
	LOG_DEBUG("cdcacm", "init");
	struct config_descriptor_cdcacm *dsc = descriptors(self);
	usb_read_complete                    = 0;

	int ret = acm_init(&dsc->comm_interface);
	acm_register_callback(
		ACM_CB_READ_READY,
		cb_acm_read_ready); //SWYM: actually not needed
	acm_register_callback(ACM_CB_CONNECTED, cb_acm_connected);
	return ret;
}

int esb_cdc_configure(struct esb_config *self)
{
	struct config_descriptor_cdcacm *dsc = descriptors(self);

	//acm_configure does not keep the amc_cfg_t pointer around
	//so stack-local lifetime is fine
	acm_cfg_t acm_cfg = {
		.in_ep         = dsc->endpoint_in.bEndpointAddress & 0x0f,
		.in_maxpacket  = MXC_USBHS_MAX_PACKET,
		.out_ep        = dsc->endpoint_out.bEndpointAddress,