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stm32/gdb_if: Use _WFI when nothing to do.

This commit is contained in:
Uwe Bonnes 2021-10-05 15:32:46 +02:00 committed by Piotr Esden-Tempski
parent 02261b900e
commit 460bd1e477
1 changed files with 10 additions and 3 deletions
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11
src/platforms/stm32/gdb_if.c
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@ -24,6 +24,7 @@
*/ */
#include "general.h" #include "general.h"
#include "cdcacm.h" #include "cdcacm.h"
#include <libopencmsis/core_cm3.h>
#include "gdb_if.h" #include "gdb_if.h"
static uint32_t count_out; static uint32_t count_out;
@ -95,6 +96,8 @@ static void gdb_if_update_buf(void)
buffer_out, CDCACM_PACKET_SIZE); buffer_out, CDCACM_PACKET_SIZE);
out_ptr = 0; out_ptr = 0;
#endif #endif
if (!count_out)
__WFI();
} }
unsigned char gdb_if_getchar(void) unsigned char gdb_if_getchar(void)
@ -102,8 +105,10 @@ unsigned char gdb_if_getchar(void)
while (!(out_ptr < count_out)) { while (!(out_ptr < count_out)) {
/* Detach if port closed */ /* Detach if port closed */
if (!cdcacm_get_dtr()) if (!cdcacm_get_dtr()) {
__WFI();
return 0x04; return 0x04;
}
gdb_if_update_buf(); gdb_if_update_buf();
} }
@ -118,8 +123,10 @@ unsigned char gdb_if_getchar_to(int timeout)
if (!(out_ptr < count_out)) do { if (!(out_ptr < count_out)) do {
/* Detach if port closed */ /* Detach if port closed */
if (!cdcacm_get_dtr()) if (!cdcacm_get_dtr()) {
__WFI(); /* systick will wake up too!*/
return 0x04; return 0x04;
}
gdb_if_update_buf(); gdb_if_update_buf();
} while (!platform_timeout_is_expired(&t) && !(out_ptr < count_out)); } while (!platform_timeout_is_expired(&t) && !(out_ptr < count_out));