Introduction to mt7628k eCos development

0 Preface
MT72628K integrates multi-port ethernet switch, but in our project we don't use it, we only use apcli function.

1 Build
1.1 eCos compile
1）
apt-get install dos2unix
tar -jxvf 2016_0905_eCos_SDK_V3.1.4.0_DPA.tar.bz2

2）
cd eCos_SDK
make clean; make

3）
eCos.img is produced in the “ra305x_ap_adv/ra305x_router”directory

4）
make module_clean; make module

1.2 eCos make menuconfig
perform make menuconfig There will be a ra305x_ap_adv/ra305x_router/include/autoconf.h file , Because many users generally do not use make menuconfig To configure , Then you can directly modify the file to add the required modules .

1.3 APP Customize a directory
in ra305x_ap_adv/ra305x_router/oem_iot
contain include、Makefile、src

in ra305x_ap_adv/ra305x_router/Makefile
[…]
# oem-begin
APPSUBDIRS += oem_iot
# oem-end
[…]

2 eCos APP Customize section
1）
in ra305x_ap_adv/ra305x_router/arch/mips/target.ld
in ra305x_ap_adv/ra305x_router/target.ld
SECTIONS
{
    [...]
    .text ALIGN (0x4) :
    {
        [...]

        . = ALIGN(4);
        PROVIDE (__core_initcall = .);
        KEEP(*(.core.initcall))
        PROVIDE (__core_initcall_end = .);

        . = ALIGN(4);
        PROVIDE (__module_initcall = .);
        KEEP(*(.module.initcall))
        PROVIDE (__module_initcall_end = .);

        . = ALIGN(4);
        PROVIDE (__late_initcall = .);
        KEEP(*(.late.initcall))
        PROVIDE (__late_initcall_end = .);

        [...]
    } > ram =0
    [...]
}

2）
in ra305x_ap_adv/ra305x_router/oem_iot/include/oem_portmisc.h
[…]
typedef void (*initcall_t)(void);

extern initcall_t __core_initcall[];
extern initcall_t __core_initcall_end[];

extern initcall_t __module_initcall[];
extern initcall_t __module_initcall_end[];

extern initcall_t __late_initcall[];
extern initcall_t __late_initcall_end[];

#if 1
#define core_initcall(fn)               \
    static initcall_t __initcall_##fn   \
__attribute__((used,section(".core.initcall"))) = fn

#define module_init(fn)                 \
    static initcall_t __initcall_##fn   \
__attribute__((used,section(".module.initcall"))) = fn

#define late_initcall(fn)               \
    static initcall_t __initcall_##fn   \
__attribute__((used,section(".late.initcall"))) = fn
#else
#define core_initcall(fn)               \
    void fn(void) __attribute__((unused))
#define module_init(fn)                 \
    void fn(void) __attribute__((unused))
#define late_initcall(fn)               \
    void fn(void) __attribute__((unused))
#endif
[…]

3）
in ra305x_ap_adv/ra305x_router/init/main.c
/* oem-begin */
#include "../oem_iot/include/oem_portmisc.h"
/* oem-end */

static void section_core_init(void)
{
    initcall_t *initcall;

    for (initcall = __core_initcall;
            initcall < __core_initcall_end;
            initcall++) {
        (*initcall)();
    }
}

static void section_module_init(void)
{
    initcall_t *initcall;

    for (initcall = __module_initcall;
            initcall < __module_initcall_end;
            initcall++) {
        (*initcall)();
    }
}

static void section_late_init(void)
{
    initcall_t *initcall;

    for (initcall = __late_initcall;
            initcall < __late_initcall_end;
            initcall++) {
        (*initcall)();
    }
}

3 eCos Standard drive frame
1） Driver path
in packages/devs/serial/mips/vrc437x

2） modify ecos.db, Compile the driver into the static library
in packages/ecos.db
package CYGPKG_IO_SERIAL_MIPS_VRC437X {
    alias         { "VRC437X serial device drivers"
                        devs_serial_mips_vrc437x
                        vrc437x_serial_driver }
    hardware
    directory      devs/serial/mips/vrc437x
    script           ser_mips_vrc437x.cdl
    description   "VRC437X serial device drivers"
}

3） Interrupt processing header file
#include <cyg/hal/hal_intr.h>
#include <cyg/hal/drv_api.h>

4 eCos API
4.1 Thread synchronization
Mailbox(cyg_mbox_create)
Mailbox The structure of is a FIFO Circular queue of type , Stored is a pointer .

4.2 CFG API
static void api_usage_test(void)
{
        cyg_uint64 c_time;
        char line[8];
        unsigned long tv_sec, tv_usec;

        c_time = cyg_current_time();
        tv_sec = (u_long)(c_time/100);
        tv_usec = (((u_long)ctime)%100) * 10000;
        diag_printf("tv_sec: %ld, tv_usec: %ld\n",
                tv_sec, tv_usec);

        // interface_config();
        CFG_get_str(CFG_SYS_OPMODE, line);
        diag_printf("opmode: %d\n",
                strtol(line, NULL, 10));

        CFG_reset_default();
        //mon_snd_cmd(MON_CMD_REBOOT);
}

4.3 Print UTC Time
#if TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# if HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif

// time_t gmt_translate2localtime(time_t gmt_time)
// struct tm *gmtime(const time_t *timep)
/* The time structure struct tm The value of is converted to the number of seconds elapsed */
// time_t mktime(struct tm *tm)
/* translate " DD-mth-YY HH:MM:SS GMT" to elapsed seconds */
// time_t tdate_parse( char* str)
API void get_now_time(void)
{
    struct timespec time;
    struct tm nowtime;

    // Get relative to 1970 The number of seconds to now
    clock_gettime(CLOCK_REALTIME, &time);
    localtime_r(&time.tv_sec, &nowtime);
    diag_printf(
            "%04d%02d%02d%02d:%02d:%02d\n",
            nowtime.tm_year + 1900,
            nowtime.tm_mon + 1,
            nowtime.tm_mday,
            nowtime.tm_hour,
            nowtime.tm_min,
            nowtime.tm_sec);
}

5 eCos Write MAC Address
ra0 Of MAC Is read 0x0004、0x0006 and 0x0008 Three registers .
hypothesis MAC Address ：00:0C:43:76:20:58
use USB2UART Line entry eCos After the command line .
cd net
iwpriv ra0 e2p 04=0C00
iwpriv ra0 e2p 06=7643
iwpriv ra0 e2p 08=5820