static void
cyg_hal_plf_sci_read(void* __ch_data, cyg_uint8* __buf, cyg_uint32 __len)
{
CYGARC_HAL_SAVE_GP();
while(__len-- > 0)
*__buf++ = cyg_hal_plf_sci_getc(__ch_data);
CYGARC_HAL_RESTORE_GP();
}
// Packet function
void
hal_diag_write_char(char c)
{
#ifdef CYG_HAL_DIAG_GDB
static char line[100];
static int pos = 0;
// No need to send CRs
if( c == '\r' ) return;
line[pos++] = c;
if( c == '\n' || pos == sizeof(line) )
{
CYG_INTERRUPT_STATE old;
// Disable interrupts. This prevents GDB trying to interrupt us
// while we are in the middle of sending a packet. The serial
// receive interrupt will be seen when we re-enable interrupts
// later.
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
CYG_HAL_GDB_ENTER_CRITICAL_IO_REGION(old);
#else
HAL_DISABLE_INTERRUPTS(old);
#endif
while(1)
{
char c1;
static char hex[] = "0123456789ABCDEF";
cyg_uint8 csum = 0;
int i;
cyg_hal_plf_sci_putc(&channel, '$');
cyg_hal_plf_sci_putc(&channel, 'O');
csum += 'O';
for( i = 0; i < pos; i++ )
{
char ch = line[i];
char h = hex[(ch>>4)&0xF];
char l = hex[ch&0xF];
cyg_hal_plf_sci_putc(&channel, h);
cyg_hal_plf_sci_putc(&channel, l);
csum += h;
csum += l;
}
cyg_hal_plf_sci_putc(&channel, '#');
cyg_hal_plf_sci_putc(&channel, hex[(csum>>4)&0xF]);
cyg_hal_plf_sci_putc(&channel, hex[csum&0xF]);
// Wait for the ACK character '+' from GDB here and handle
// receiving a ^C instead.
c1 = (char) cyg_hal_plf_sci_getc(&channel);
if( c1 == '+' )
break; // a good acknowledge
// Check for user break.
if( cyg_hal_is_break( &c1, 1 ) )
cyg_hal_user_break( NULL );
// otherwise, loop round again
}
pos = 0;
// And re-enable interrupts
#ifdef CYGDBG_HAL_DEBUG_GDB_INCLUDE_STUBS
CYG_HAL_GDB_LEAVE_CRITICAL_IO_REGION(old);
#else
HAL_RESTORE_INTERRUPTS(old);
#endif
}
void
hal_diag_read_char(char *c)
{
*c = (char) cyg_hal_plf_sci_getc(&channel);
}
