diff --git a/src/main.c b/src/main.c
index fe520d8e..de119536 100644
--- a/src/main.c
+++ b/src/main.c
@@ -45,7 +45,6 @@ main(int argc, char **argv)
 		volatile struct exception e;
 		TRY_CATCH(e, EXCEPTION_ALL) {
 			gdb_main();
-			uart_pop();
 		}
 		if (e.type) {
 			gdb_putpacketz("EFF");
diff --git a/src/platforms/jeff/platform.c b/src/platforms/jeff/platform.c
index 0873c9c8..2171e2f6 100644
--- a/src/platforms/jeff/platform.c
+++ b/src/platforms/jeff/platform.c
@@ -52,9 +52,9 @@ void sys_tick_handler(void)
 	if(running_status)
 		gpio_toggle(LED_PORT, LED_IDLE_RUN);
 
-	time_ms += 1;
+	time_ms += 10;
 
-	uart_pop();
+	//uart_pop();
 }
 
 uint32_t platform_time_ms(void)
@@ -81,7 +81,7 @@ static uint32_t timing_init(void)
 	uint32_t cal = 0;
 
 	systick_set_clocksource(STK_CSR_CLKSOURCE_AHB);
-	systick_set_reload(48000);	/* Interrupt us at 10 Hz */
+	systick_set_reload(4800);	/* Interrupt us at 10 Hz */
 	systick_interrupt_enable();
 
 	systick_counter_enable();
diff --git a/src/platforms/jeff/platform.h b/src/platforms/jeff/platform.h
index 2778f93e..114dacde 100644
--- a/src/platforms/jeff/platform.h
+++ b/src/platforms/jeff/platform.h
@@ -44,29 +44,29 @@ extern uint8_t running_status;
 #define LED_ERROR	GPIO10
 
 #define TMS_PORT	PORTA
-#define TMS_PIN		GPIO7
+#define TMS_PIN		GPIO1
 
 #define TCK_PORT	PORTA
-#define TCK_PIN		GPIO5
+#define TCK_PIN		GPIO2
 
 #define TDI_PORT	PORTA
 #define TDI_PIN		GPIO3
 
 #define TDO_PORT	PORTA
-#define TDO_PIN		GPIO2
+#define TDO_PIN		GPIO3
 
 #define SWO_PORT	PORTA
 #define SWO_PIN		GPIO6
 
 #define SWDIO_PORT	PORTA
 #define SWDIO_PIN	TMS_PIN
-#define SWDIO_PIN_NUM	7
+#define SWDIO_PIN_NUM	1
 
 #define SWCLK_PORT	PORTA
 #define SWCLK_PIN	TCK_PIN
 
 #define SRST_PORT	PORTA
-#define SRST_PIN	GPIO6
+#define SRST_PIN	GPIO7
 
 #define LED_PORT_UART	PORTA
 #define LED_UART	GPIO12