Enable SWD

keirf · Dec 3, 2019 · 8ab2e4f · 8ab2e4f
1 parent 27bb535
commit 8ab2e4f
Show file tree

Hide file tree

Showing 2 changed files with 3 additions and 2 deletions.
diff --git a/inc/stm32f10x_regs.h b/inc/stm32f10x_regs.h
@@ -321,7 +321,8 @@ struct afio {
     uint32_t mapr2;      /* 1C: AF remap and debug I/O configuration #2 */
 };
 
-#define AFIO_MAPR_SWJ_CFG_DISABLED     (4u<<24)
+#define AFIO_MAPR_SWJ_CFG_DISABLED     (4u<<24)    /* JTAG-DP Disabled and SW-DP Disabled */
+#define AFIO_MAPR_SWJ_CFG_JTAGDISABLE  (2u<<24)    /* JTAG-DP Disabled and SW-DP Enabled */
 #define AFIO_MAPR_TIM4_REMAP_FULL      (1u<<12)
 #define AFIO_MAPR_TIM3_REMAP_FULL      (3u<<10)
 #define AFIO_MAPR_TIM3_REMAP_PARTIAL   (2u<<10)

diff --git a/src/stm32f10x.c b/src/stm32f10x.c
@@ -136,7 +136,7 @@ static void peripheral_init(void)
     rcc->ahbenr = RCC_AHBENR_DMA1EN;
 
     /* Turn off serial-wire JTAG and reclaim the GPIOs. */
-    afio->mapr = AFIO_MAPR_SWJ_CFG_DISABLED;
+    afio->mapr = AFIO_MAPR_SWJ_CFG_JTAGDISABLE;
 
     /* All pins in a stable state. */
     gpio_init(gpioa);