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stm32/usbdev: Add support for MSC-only USB device class. 

Select this mode in boot.py via: pyb.usb_mode('MSC')
This commit is contained in:
Damien George 2018-02-01 15:47:16 +11:00
parent 72ca049de7
commit 3130424b54
3 changed files with 60 additions and 0 deletions
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5
ports/stm32/usb.c
View File

@ -293,6 +293,11 @@ STATIC mp_obj_t pyb_usb_mode(size_t n_args, const mp_obj_t *pos_args, mp_map_t *
pid = USBD_PID_CDC;
}
mode = USBD_MODE_CDC;
} else if (strcmp(mode_str, "MSC") == 0) {
if (args[2].u_int == -1) {
pid = USBD_PID_MSC;
}
mode = USBD_MODE_MSC;
} else {
goto bad_mode;
}

1
ports/stm32/usb.h
View File

@ -35,6 +35,7 @@
#define USBD_PID_CDC_MSC (0x9800)
#define USBD_PID_CDC_HID (0x9801)
#define USBD_PID_CDC (0x9802)
#define USBD_PID_MSC (0x9803)
typedef enum {
PYB_USB_STORAGE_MEDIUM_NONE = 0,

54
ports/stm32/usbdev/class/src/usbd_cdc_msc_hid.c
View File

@ -28,6 +28,7 @@
#include "usbd_ioreq.h"
#include "usbd_cdc_msc_hid.h"
#define MSC_TEMPLATE_CONFIG_DESC_SIZE (32)
#define CDC_TEMPLATE_CONFIG_DESC_SIZE (67)
#define CDC_MSC_TEMPLATE_CONFIG_DESC_SIZE (98)
#define CDC_HID_TEMPLATE_CONFIG_DESC_SIZE (107)
@ -89,6 +90,54 @@ __ALIGN_BEGIN static uint8_t USBD_CDC_MSC_HID_DeviceQualifierDesc[USB_LEN_DEV_QU
};
*/
// USB MSC device Configuration Descriptor
static const uint8_t msc_template_config_desc[MSC_TEMPLATE_CONFIG_DESC_SIZE] = {
//--------------------------------------------------------------------------
// Configuration Descriptor
0x09, // bLength: Configuration Descriptor size
USB_DESC_TYPE_CONFIGURATION, // bDescriptorType: Configuration
LOBYTE(MSC_TEMPLATE_CONFIG_DESC_SIZE), // wTotalLength: no of returned bytes
HIBYTE(MSC_TEMPLATE_CONFIG_DESC_SIZE),
0x01, // bNumInterfaces: 1 interfaces
0x01, // bConfigurationValue: Configuration value
0x00, // iConfiguration: Index of string descriptor describing the configuration
0x80, // bmAttributes: bus powered; 0xc0 for self powered
0xfa, // bMaxPower: in units of 2mA
//==========================================================================
// MSC only has 1 interface so doesn't need an IAD
//--------------------------------------------------------------------------
// Interface Descriptor
0x09, // bLength: Interface Descriptor size
USB_DESC_TYPE_INTERFACE, // bDescriptorType: interface descriptor
MSC_IFACE_NUM_WITH_CDC, // bInterfaceNumber: Number of Interface
0x00, // bAlternateSetting: Alternate setting
0x02, // bNumEndpoints
0x08, // bInterfaceClass: MSC Class
0x06, // bInterfaceSubClass : SCSI transparent
0x50, // nInterfaceProtocol
0x00, // iInterface:
// Endpoint IN descriptor
0x07, // bLength: Endpoint descriptor length
USB_DESC_TYPE_ENDPOINT, // bDescriptorType: Endpoint descriptor type
MSC_IN_EP, // bEndpointAddress: IN, address 3
0x02, // bmAttributes: Bulk endpoint type
LOBYTE(MSC_MAX_PACKET), // wMaxPacketSize
HIBYTE(MSC_MAX_PACKET),
0x00, // bInterval: ignore for Bulk transfer
// Endpoint OUT descriptor
0x07, // bLength: Endpoint descriptor length
USB_DESC_TYPE_ENDPOINT, // bDescriptorType: Endpoint descriptor type
MSC_OUT_EP, // bEndpointAddress: OUT, address 3
0x02, // bmAttributes: Bulk endpoint type
LOBYTE(MSC_MAX_PACKET), // wMaxPacketSize
HIBYTE(MSC_MAX_PACKET),
0x00, // bInterval: ignore for Bulk transfer
};
// USB CDC MSC device Configuration Descriptor
static const uint8_t cdc_msc_template_config_desc[CDC_MSC_TEMPLATE_CONFIG_DESC_SIZE] = {
//--------------------------------------------------------------------------
@ -554,6 +603,11 @@ int USBD_SelectMode(usbd_cdc_msc_hid_state_t *usbd, uint32_t mode, USBD_HID_Mode
// construct config desc
switch (usbd->usbd_mode) {
case USBD_MODE_MSC:
usbd->usbd_config_desc_size = sizeof(msc_template_config_desc);
memcpy(usbd->usbd_config_desc, msc_template_config_desc, sizeof(msc_template_config_desc));
break;
case USBD_MODE_CDC_MSC:
usbd->usbd_config_desc_size = sizeof(cdc_msc_template_config_desc);
memcpy(usbd->usbd_config_desc, cdc_msc_template_config_desc, sizeof(cdc_msc_template_config_desc));