Merge pull request #47 from richardeoin/target-power

Added monitor option to toggle target power

src/command.c

@@ -47,6 +47,7 @@ static bool cmd_swdp_scan(void);
 static bool cmd_targets(target *t);
 static bool cmd_morse(void);
 static bool cmd_connect_srst(target *t, int argc, const char **argv);
+static bool cmd_target_power(target *t, int argc, const char **argv);
 #ifdef PLATFORM_HAS_TRACESWO
 static bool cmd_traceswo(void);
 #endif
@@ -59,6 +60,7 @@ const struct command_s cmd_list[] = {
 	{"targets", (cmd_handler)cmd_targets, "Display list of available targets" },
 	{"morse", (cmd_handler)cmd_morse, "Display morse error message" },
 	{"connect_srst", (cmd_handler)cmd_connect_srst, "Configure connect under SRST: (enable|disable)" },
+	{"tpwr", (cmd_handler)cmd_target_power, "Supplies power to the target: (enable|disable)"},
 #ifdef PLATFORM_HAS_TRACESWO
 	{"traceswo", (cmd_handler)cmd_traceswo, "Start trace capture" },
 #endif
@@ -221,6 +223,16 @@ static bool cmd_connect_srst(target *t, int argc, const char **argv)
 		connect_assert_srst = !strcmp(argv[1], "enable");
 	return true;
 }
+static bool cmd_target_power(target *t, int argc, const char **argv)
+{
+	(void)t;
+	if (argc == 1)
+		gdb_outf("Target Power: %s\n",
+			 !platform_target_get_power() ? "enabled" : "disabled");
+	else
+		platform_target_set_power(!strncmp(argv[1], "enable", strlen(argv[1])));
+	return true;
+}
 
 #ifdef PLATFORM_HAS_TRACESWO
 static bool cmd_traceswo(void)

src/platforms/native/platform.c

@@ -158,7 +158,18 @@ void platform_srst_set_val(bool assert)
 		gpio_set_val(SRST_PORT, SRST_PIN, !assert);
 	}
 }
-
+bool platform_target_get_power(void) {
+	if (platform_hwversion() > 0) {
+		return gpio_get(PWR_BR_PORT, PWR_BR_PIN);
+  	}
+	return 1; // 1 = Unpowered
+}
+void platform_target_set_power(bool power)
+{
+	if (platform_hwversion() > 0) {
+		gpio_set_val(PWR_BR_PORT, PWR_BR_PIN, !power);
+	}
+}
 void platform_delay(uint32_t delay)
 {
 	timeout_counter = delay;

src/platforms/native/platform.h

@@ -231,3 +231,5 @@ static inline uint16_t _gpio_get(uint32_t gpioport, uint16_t gpios)
 void assert_boot_pin(void);
 void setup_vbus_irq(void);
 void platform_srst_set_val(bool assert);
+bool platform_target_get_power(void);
+void platform_target_set_power(bool power);

src/platforms/stm32/jtagtap.c

@@ -42,10 +42,12 @@ int jtagtap_init(void)
 void jtagtap_reset(void)
 {
 #ifdef TRST_PORT
+	if (platform_hwversion() == 0) {
 		volatile int i;
 		gpio_clear(TRST_PORT, TRST_PIN);
 		for(i = 0; i < 10000; i++) asm("nop");
 		gpio_set(TRST_PORT, TRST_PIN);
+	}
 #endif
 	jtagtap_soft_reset();
 }