More files for the Cortex-M0/NUC120 port

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@5659 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 115 insertions, 0 deletions

diff --git a/nuttx/arch/arm/src/nuc1xx/nuc_lowputc.c b/nuttx/arch/arm/src/nuc1xx/nuc_lowputc.c
new file mode 100644
index 000000000..7d8509feb
--- /dev/null
+++ b/nuttx/arch/arm/src/nuc1xx/nuc_lowputc.c
@@ -0,0 +1,115 @@
+/****************************************************************************
+ * arch/arm/src/nuc1xx/nuc_lowputc.c
+ *
+ *   Copyright (C) 2013 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <stdint.h>
+#include <assert.h>
+#include <debug.h>
+
+#include <arch/board/board.h>
+
+#include "up_arch.h"
+
+#include "chip.h"
+#include "nuc_config.h"
+#include "chip/chip/nuc_clk.h"
+#include "chip/chip/nuc_uart.h"
+
+#include "nuc_lowputc.h"
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+/* Here we assume that the default clock source for the UART modules is
+ * the external high speed crystal.
+ */
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Name: nuc_lowsetup
+ *
+ * Description:
+ *   Called at the very beginning of _start.  Performs low level initialization.
+ *
+ *****************************************************************************/
+
+void nuc_lowsetup(void)
+{
+#ifdef HAVE_UART
+  uint32_t regval;
+
+  /* Configure the UART clock source 
+   *
+   * Here we assume that the UART clock source is the external high speed
+   * crystal -- the power on default value in the CLKSEL0 register.
+   */
+
+  /* Enable UART clocking for the selected UARTs */
+
+  regval = getreg32(NUC_CLK_APBCLK);
+  regval &= ~(CLK_APBCLK_UART0_EN | CLK_APBCLK_UART1_EN | CLK_APBCLK_UART2_EN);
+
+#ifdef CONFIG_NUC_UART0
+  regval |= CLK_APBCLK_UART0_EN;
+#endif
+#ifdef CONFIG_NUC_UART1
+  regval |= CLK_APBCLK_UART1_EN;
+#endif
+#ifdef CONFIG_NUC_UART2
+  regval |= CLK_APBCLK_UART2_EN;
+#endif
+
+  putreg32(regval, NUC_CLK_APBCLK);
+
+  /* Configure UART GPIO pins */
+#warning "Missing logic"
+
+  /* Configure the console UART */
+#warning "Missing logic"
+
+#endif /* HAVE_UART */
+}
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