1 files changed, 110 insertions, 0 deletions
diff --git a/os/hal/platforms/STM8S/hal_lld.c b/os/hal/platforms/STM8S/hal_lld.c
new file mode 100644
index 000000000..87010481c
--- /dev/null
+++ b/os/hal/platforms/STM8S/hal_lld.c
@@ -0,0 +1,110 @@
+/*
+    ChibiOS/RT - Copyright (C) 2006,2007,2008,2009,2010 Giovanni Di Sirio.
+
+    This file is part of ChibiOS/RT.
+
+    ChibiOS/RT is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    ChibiOS/RT is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/**
+ * @file    STM8/hal_lld.c
+ * @brief   STM8 HAL subsystem low level driver source.
+ *
+ * @addtogroup HAL
+ * @{
+ */
+
+#include "ch.h"
+#include "hal.h"
+
+/*===========================================================================*/
+/* Driver exported variables.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables.                                                   */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions.                                                   */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver interrupt handlers.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions.                                                */
+/*===========================================================================*/
+
+/**
+ * @brief   Low level HAL driver initialization.
+ * @details Clock sources initialization, HSI is assumed to be already
+ *          started after reset.
+ * @note    If the @p STM8_CLOCK_INIT option is set to @p FALSE then the
+ *          initialization is not performed and is left to the application.
+ *
+ * @notapi
+ */
+void hal_lld_init(void) {
+
+#if !STM8_NO_CLOCK_INIT
+  /* Makes sure that HSI is stable before proceeding.*/
+  CLK->ICKR |= CLK_ICKR_HSIRDY;
+  while ((CLK->ICKR & CLK_ICKR_HSIRDY) == 0)
+    ;
+
+  /* LSI startup and stabilization if required.*/
+#if STM8_LSI_ENABLED
+  CLK->ICKR |= CLK_ICKR_LSIEN;
+  while ((CLK->ICKR & CLK_ICKR_LSIRDY) == 0)
+    ;
+#endif
+
+  /* HSE startup and stabilization if required.*/
+#if STM8_HSE_ENABLED
+  CLK->ECKR |= CLK_ECKR_HSEEN;
+  while ((CLK->ECKR & CLK_ECKR_HSERDY) == 0)
+    ;
+#endif
+
+  /* Setting up clock dividers.*/
+  CLK->CKDIVR  = (STM8_HSI_DIVIDER << 3) | (STM8_CPU_DIVIDER << 0);
+
+  /* SYSCLK switch to the selected source, not necessary if it is HSI.*/
+#if STM8_SYSCLK_SOURCE != CLK_SYSSEL_HSI
+  /* Switching clock (manual switch mode).*/
+  CLK->SWR  = STM8_SYSCLK_SOURCE;
+  while ((CLK->SWCR & CLK_SWCR_SWIF) == 0)
+    ;
+  CLK->SWCR = CLK_SWCR_SWEN;
+#endif
+
+  /* Clocks initially all disabled.*/
+  CLK->PCKENR1 = 0;
+  CLK->PCKENR2 = 0;
+
+  /* Other clock related initializations.*/
+  CLK->CSSR    = 0;
+  CLK->CCOR    = 0;
+  CLK->CANCCR  = STM8_CAN_DIVIDER_VALUE;
+
+  /* HSI disabled if it is no more required.*/
+#if !STM8_HSI_ENABLED
+  CLK->ICKR &= ~CLK_ICKR_HSIEN;
+#endif
+#endif /* !STM8_NO_CLOCK_INIT */
+}
+
+/** @} */