shell: jtag: add command to enable/disable JTAG

source/main.c

@@ -17,6 +17,7 @@
 #include <shell/boot.h>
 #include <shell/buzzer.h>
 #include <shell/echo.h>
+#include <shell/jtag.h>
 #include <shell/led.h>
 #include <shell/mufs.h>
 #include <shell/rtc.h>
@@ -45,6 +46,9 @@ struct cmd user_cmds[] = {
 
 struct cmd admin_cmds[] = {
 	{ "echo", shell_echo },
+#ifdef STM32F1
+	{ "jtag", shell_jtag },
+#endif
 	{ "buzzer", shell_buzzer },
 	{ "led", shell_led },
 	{ "reset", shell_alarm },

source/platform/stm32f1/gpio.c

@@ -30,7 +30,8 @@ int gpio_init(void)
 		GPIO1);
 
 	/* Set up GPIOs for timers. */
-	gpio_primary_remap(0, AFIO_MAPR_TIM2_REMAP_PARTIAL_REMAP1);
+	gpio_primary_remap(AFIO_MAPR_SWJ_CFG_JTAG_OFF_SW_ON,
+		AFIO_MAPR_TIM2_REMAP_PARTIAL_REMAP1);
 	gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
 		GPIO_CNF_OUTPUT_ALTFN_PUSHPULL, GPIO_TIM2_PR1_CH1_ETR);
 

source/shell/Makefile

@@ -11,3 +11,7 @@ obj-y += source/shell/mufs.o
 obj-y += source/shell/progress.o
 obj-y += source/shell/rtc.o
 obj-y += source/shell/version.o
+
+ifeq (${TARGET},stm32f1)
+obj-y += source/shell/jtag.o
+endif