device_mass_storage_task.c File Reference

#include "conf_usb.h"
#include "board.h"
#include "FreeRTOS.h"
#include "semphr.h"
#include "task.h"
#include "usb_drv.h"
#include "usb_descriptors.h"
#include "usb_standard_request.h"
#include "ctrl_access.h"
#include "scsi_decoder.h"
#include "device_mass_storage_task.h"
#include "supervisor.h"

Functions
void	device_mass_storage_task (void *pvParameters)
	Entry point of the device mass-storage task management. More...
void	device_mass_storage_task_init (void)
	This function initializes the hardware/software resources required for device mass-storage task. More...
static void	usb_mass_storage_cbw (void)
	USB Command Block Wrapper (CBW) management. More...
static void	usb_mass_storage_csw (void)
	USB Command Status Wrapper (CSW) management. More...
void	usb_sof_action (void)
	usb_sof_action More...

Variables
static U32	dCBWTag
U8	ms_endpoint
volatile bool	ms_multiple_drive
static U16	sof_cnt
U8	usb_LUN
static portBASE_TYPE	xGiveUsbMutex = pdFALSE
xSemaphoreHandle	xUSBMutex

void device_mass_storage_task

(

void *

pvParameters

)

Entry point of the device mass-storage task management.

This function links the device mass-storage SCSI commands to the USB bus.

Parameters

pvParameters

Input. Unused.

References configTSK_USB_DMS_PERIOD, EP_MS_OUT, Is_device_enumerated, Is_usb_out_received, usb_mass_storage_cbw(), usb_mass_storage_csw(), vTaskDelayUntil(), and xTaskGetTickCount().

Referenced by device_mass_storage_task_init().

void device_mass_storage_task_init

(

void

)

This function initializes the hardware/software resources required for device mass-storage task.

References configTSK_USB_DMS_NAME, configTSK_USB_DMS_PRIORITY, configTSK_USB_DMS_STACK_SIZE, device_mass_storage_task(), EP_MS_IN, EP_MS_OUT, g_scsi_ep_ms_in, g_scsi_ep_ms_out, NULL, sof_cnt, and xTaskCreate.

Referenced by b_usbsys_start().

static void usb_mass_storage_cbw ( void  )

static

USB Command Block Wrapper (CBW) management.

This function decodes the CBW command and stores the SCSI command.

Check if dCBWSignature is correct

Store CBW Tag to be repeated in CSW

if (bmCBWFlags.bit7 == 1) {direction = IN;}

Dummy CBWCBLength read

Store scsi_command

References dCBWTag, EP_MS_IN, EP_MS_OUT, g_scsi_command, g_scsi_data_remaining, get_cur_lun(), ms_endpoint, ms_multiple_drive, NULL, pdFALSE, scsi_decode_command(), Usb_ack_out_received_free, Usb_enable_stall_handshake, usb_format_usb_to_mcu_data, usb_LUN, Usb_read_endpoint_data, usb_read_ep_rxpacket(), Usb_reset_endpoint_fifo_access, x_supervisor_SemaphoreTake(), and xGiveUsbMutex.

Referenced by device_mass_storage_task().

static void usb_mass_storage_csw ( void  )

static

USB Command Status Wrapper (CSW) management.

This function sends the status in relation with the last CBW.

Write CSW Signature

Write stored CBW Tag

Write data residual value

Write command status

References dCBWTag, EP_MS_IN, EP_MS_OUT, g_scsi_data_remaining, g_scsi_status, Is_usb_endpoint_stall_requested, Is_usb_in_ready, Is_usb_out_received, Is_usb_setup_received, Usb_ack_in_ready_send, Usb_ack_out_received_free, usb_format_mcu_to_usb_data, Usb_nb_busy_bank, usb_process_request(), Usb_reset_endpoint_fifo_access, Usb_write_endpoint_data, x_supervisor_SemaphoreGive(), and xGiveUsbMutex.

Referenced by device_mass_storage_task().

U32 dCBWTag

static

Referenced by usb_mass_storage_cbw(), and usb_mass_storage_csw().

U8 ms_endpoint

Referenced by sbc_read_10(), sbc_write_10(), and usb_mass_storage_cbw().

volatile bool ms_multiple_drive

Referenced by usb_mass_storage_cbw(), usb_user_endpoint_init(), and usb_user_read_request().

U16 sof_cnt

static

Referenced by device_mass_storage_task_init(), and usb_sof_action().

U8 usb_LUN

Referenced by sbc_header_mode_sense(), sbc_read_10(), sbc_read_capacity(), sbc_test_unit_ready(), sbc_write_10(), and usb_mass_storage_cbw().

portBASE_TYPE xGiveUsbMutex = pdFALSE

static

Referenced by usb_mass_storage_cbw(), and usb_mass_storage_csw().

xSemaphoreHandle xUSBMutex

The USB system mutex.