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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2010-11-10 14:36:26 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2010-11-10 14:36:26 +0000 |
| commit | 2e065803c90233b5ae5cd094cdbf45efa32a4b19 (patch) | |
| tree | bec05ca166e9d4cdb9c17d5d367701945a8b13e2 /boards/ST_STM8L_DISCOVERY/board.c | |
| parent | e5c365f61563007712f5f28500e04ba61e33994a (diff) | |
| download | ChibiOS-2e065803c90233b5ae5cd094cdbf45efa32a4b19.tar.gz ChibiOS-2e065803c90233b5ae5cd094cdbf45efa32a4b19.tar.bz2 ChibiOS-2e065803c90233b5ae5cd094cdbf45efa32a4b19.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@2341 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'boards/ST_STM8L_DISCOVERY/board.c')
| -rw-r--r-- | boards/ST_STM8L_DISCOVERY/board.c | 67 |
1 files changed, 67 insertions, 0 deletions
diff --git a/boards/ST_STM8L_DISCOVERY/board.c b/boards/ST_STM8L_DISCOVERY/board.c new file mode 100644 index 000000000..b4c619a38 --- /dev/null +++ b/boards/ST_STM8L_DISCOVERY/board.c @@ -0,0 +1,67 @@ +/*
+ 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/>.
+*/
+
+#include "ch.h"
+#include "hal.h"
+
+/*
+ * TIM 2 clock after the prescaler.
+ */
+#define TIM2_CLOCK (SYSCLK / 16)
+#define TIM2_ARR ((TIM2_CLOCK / CH_FREQUENCY) - 1)
+
+/*
+ * TIM2 interrupt handler.
+ */
+CH_IRQ_HANDLER(20) {
+
+ CH_IRQ_PROLOGUE();
+
+ chSysLockFromIsr();
+ chSysTimerHandlerI();
+ chSysUnlockFromIsr();
+
+ TIM2->SR1 = 0;
+
+ CH_IRQ_EPILOGUE();
+}
+
+/*
+ * Board initialization code.
+ */
+void hwinit(void) {
+
+ /*
+ * HAL initialization.
+ */
+ halInit();
+
+ /*
+ * TIM2 initialization as system tick.
+ */
+ CLK->PCKENR1 |= 32; /* PCKEN15, TIM2 clock source.*/
+ TIM2->PSCR = 4; /* Prescaler divide by 2^4=16.*/
+ TIM2->ARRH = (uint8_t)(TIM2_ARR >> 8);
+ TIM2->ARRL = (uint8_t)(TIM2_ARR);
+ TIM2->CNTRH = 0;
+ TIM2->CNTRL = 0;
+ TIM2->SR1 = 0;
+ TIM2->IER = 1; /* UIE */
+ TIM2->CR1 = 1; /* CEN */
+}
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