Hi,
I use libopencm3 on STM32F103 maple-mini clones.
Some time ago, I tried the usb_cdcacm examples (see link (1) below) for
serial-over-USB on these devices, which compiles and works nicely.
All very fine.
Now, I would like to use this and combine it with an application that
reads and dumps the data on a a mifare rfid-tag using a nfrc522
rfid-reader. This is a port of the arduino mfrc522 C++ library to
opencm3. (see link 2 below)
The current version of my application uses the serial UART-port on the
STM32F103 which works great, but I like to use the serial-over-USB
interface.
As my mnf522-application is writen in C++, I need to compile the
"serial-over-usb" code in cdcacm.c (see link 3 below) using C++ instead
of gcc.
But I get this error:
--- cut here --- cut here --- cut here --- cut here ---
USBserial.h:142:2: error: elements of array 'const usb_interface ifaces
[]' have incomplete type
}};
^
USBserial.h:142:2: error: storage size of 'ifaces' isn't known
--- cut here --- cut here --- cut here --- cut here ---
This relates to this piece of code:
static const struct usb_interface ifaces[] = {{
.num_altsetting = 1,
.altsetting = comm_iface,
}, {
.num_altsetting = 1,
.altsetting = data_iface,
}};
(see lines 145 of
https://github.com/libopencm3/libopencm3-examples/blob/master/examples/stm32/f1/stm32-h103/usb_cdcacm/cdcacm.c
and above).
These structures are defined in "libopencm3/usb/usbstd.h" here:
/* USB Standard Configuration Descriptor - Table 9-10 */
struct usb_config_descriptor {
uint8_t bLength;
(...)
/* Descriptor ends here. The following are used internally: */
const struct usb_interface {
uint8_t *cur_altsetting;
uint8_t num_altsetting;
const struct usb_iface_assoc_descriptor *iface_assoc;
const struct usb_interface_descriptor *altsetting;
} *interface;
(...)
Development is done on an ubuntu 16.04 LTS. gcc is arm-none-eabi-gcc /
gcc version 4.9.3 20141119 (release) [ARM/embedded-4_9-branch revision
218278] (GNU Tools for ARM Embedded Processors)
The source of this version of gcc is "gcc4mbed"
So, my impression is that there are some differences in how gcc compiles
this as C then as C++.
Did anybody have simular issues?
What version of arm-none-eabi-gcc are you all now using (on ubuntu)?
Cheerio! Kr. Bonne.
(1)
https://github.com/libopencm3/libopencm3-examples/tree/master/examples/stm32/f1/stm32-h103/usb_cdcacm
(2) https://github.com/miguelbalboa/rfid
(3)
https://github.com/libopencm3/libopencm3-examples/blob/master/examples/stm32/f1/stm32-h103/usb_cdcacm/cdcacm.c
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