altos: Use SYSTICK on STM32L

[fw/altos] / src / stm / stm32l.h

diff --git a/src/stm/stm32l.h b/src/stm/stm32l.h
index 1d6360372e9a51c604bc059b88b8961f27ffc4fb..5c0748a6891dd3432b34329422bb745f42e41fef 100644 (file)
--- a/src/stm/stm32l.h
+++ b/src/stm/stm32l.h
@@ -811,6 +811,24 @@ extern struct stm_lcd stm_lcd;
 #define STM_LCD_CLR_UDDC               (3)
 #define STM_LCD_CLR_SOFC               (1)
 
+/* The SYSTICK starts at 0xe000e010 */
+
+struct stm_systick {
+       vuint32_t       csr;
+       vuint32_t       rvr;
+       vuint32_t       cvr;
+       vuint32_t       calib;
+};
+
+extern struct stm_systick stm_systick;
+
+#define STM_SYSTICK_CSR_ENABLE         0
+#define STM_SYSTICK_CSR_TICKINT                1
+#define STM_SYSTICK_CSR_CLKSOURCE      2
+#define  STM_SYSTICK_CSR_CLKSOURCE_HCLK_8              0
+#define  STM_SYSTICK_CSR_CLKSOURCE_HCLK                        1
+#define STM_SYSTICK_CSR_COUNTFLAG      16
+
 /* The NVIC starts at 0xe000e100, so add that to the offsets to find the absolute address */
 
 struct stm_nvic {