diff options
Diffstat (limited to 'os/hal/platforms/SAM4L/hal_lld.h')
| -rw-r--r-- | os/hal/platforms/SAM4L/hal_lld.h | 41 |
1 files changed, 40 insertions, 1 deletions
diff --git a/os/hal/platforms/SAM4L/hal_lld.h b/os/hal/platforms/SAM4L/hal_lld.h index 82c2446ef..879d31bde 100644 --- a/os/hal/platforms/SAM4L/hal_lld.h +++ b/os/hal/platforms/SAM4L/hal_lld.h @@ -26,7 +26,7 @@ * - SAM_OSC32K_CLK.
* - SAM_OSC32K_MODE_EXT (optional)
* - SAM_OSC0_CLK.
- * - SAM_OSC0_MODE_EXT (optional)
+ * - SAM_OSCCTRL_MODE
* .
*
* @addtogroup HAL
@@ -222,6 +222,19 @@ #define SAM_PMCON_PS1 (1 << 0)
/** @} */
+/**
+ * @name OSCCTRL0 registers bits definitions
+ * @{
+ */
+#define SAM_OSCCTRL_MODE_EXT (0 << 0)
+#define SAM_OSCCTRL_MODE_XTAL (1 << 0)
+#define SAM_OSCCTRL_GAIN_0 (0 << 1)
+#define SAM_OSCCTRL_GAIN_1 (1 << 1)
+#define SAM_OSCCTRL_GAIN_2 (2 << 1)
+#define SAM_OSCCTRL_GAIN_3 (3 << 1)
+#define SAM_OSCCTRL_OSCEN (1 << 16)
+/** @} */
+
/*===========================================================================*/
/* Driver pre-compile time settings. */
/*===========================================================================*/
@@ -321,6 +334,32 @@ #endif
/** @} */
+/* OSC0 mode check.*/
+#if (SAM_OSCCTRL_MODE != SAM_OSCCTRL_MODE_EXT) && \
+ (SAM_OSCCTRL_MODE != SAM_OSCCTRL_MODE_XTAL)
+#error "invalid SAM_OSCCTRL_MODE value specified"
+#endif
+
+/**
+ * @brief OSC0 gain setting.
+ */
+#if SAM_OSCCTRL_MODE == SAM_OSCCTRL_MODE_EXT
+#define SAM_OSCCTRL_GAIN 0
+#else
+#if SAM_OSC0_CLK < 12000000
+#define SAM_OSCCTRL_GAIN SAM_OSCCTRL_GAIN_0
+#elif SAM_OSC0_CLK < 16000000
+#define SAM_OSCCTRL_GAIN SAM_OSCCTRL_GAIN_1
+#else
+#define SAM_OSCCTRL_GAIN SAM_OSCCTRL_GAIN_2
+#endif
+#endif
+
+/**
+ * @brief OSC0 startup setting.
+ */
+#define SAM_OSCCTRL_STARTUP SCIF_OSCCTRL0_STARTUP(2)
+
/**
* @brief Selected RCFAST clock frequency.
*/
|