From 4ac0b638b92db47625d729b938e71b262dadbb43 Mon Sep 17 00:00:00 2001
From: Fabio Utzig <utzig@utzig.org>
Date: Fri, 15 May 2015 20:44:03 -0300
Subject: Add basic PAL driver

---
 os/hal/ports/NRF51/NRF51822/pal_lld.c | 129 ++++++++++++++++++++++++++++++++++
 1 file changed, 129 insertions(+)
 create mode 100644 os/hal/ports/NRF51/NRF51822/pal_lld.c

(limited to 'os/hal/ports/NRF51/NRF51822/pal_lld.c')

diff --git a/os/hal/ports/NRF51/NRF51822/pal_lld.c b/os/hal/ports/NRF51/NRF51822/pal_lld.c
new file mode 100644
index 0000000..ccbe20e
--- /dev/null
+++ b/os/hal/ports/NRF51/NRF51822/pal_lld.c
@@ -0,0 +1,129 @@
+/*
+    Copyright (C) 2015 Fabio Utzig
+
+    Licensed under the Apache License, Version 2.0 (the "License");
+    you may not use this file except in compliance with the License.
+    You may obtain a copy of the License at
+
+        http://www.apache.org/licenses/LICENSE-2.0
+
+    Unless required by applicable law or agreed to in writing, software
+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+    See the License for the specific language governing permissions and
+    limitations under the License.
+*/
+
+/**
+ * @file    pal_lld.c
+ * @brief   NRF51822 PAL subsystem low level driver source.
+ *
+ * @addtogroup PAL
+ * @{
+ */
+
+#include "osal.h"
+#include "hal.h"
+
+#if (HAL_USE_PAL == TRUE) || defined(__DOXYGEN__)
+
+/*===========================================================================*/
+/* Driver local definitions.                                                 */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions.                                                   */
+/*===========================================================================*/
+
+void _pal_lld_setpadmode(uint8_t pad, iomode_t mode)
+{
+  uint8_t value = 0;
+
+  osalDbgAssert(pad < 32, "invalid pad");
+
+  switch (mode) {
+  case PAL_MODE_RESET:
+  case PAL_MODE_UNCONNECTED:
+    value = 2;
+    break;
+  case PAL_MODE_INPUT:
+  case PAL_MODE_INPUT_ANALOG:
+    value = 0;
+    break;
+  case PAL_MODE_INPUT_PULLUP:
+    value = 0xC;
+    break;
+  case PAL_MODE_INPUT_PULLDOWN:
+    value = 4;
+    break;
+  case PAL_MODE_OUTPUT_PUSHPULL:
+    value = 1;
+    break;
+  case PAL_MODE_OUTPUT_OPENDRAIN:
+    value = 0x61;
+    break;
+  }
+
+  NRF_GPIO->PIN_CNF[pad] = value;
+}
+
+/*===========================================================================*/
+/* Driver interrupt handlers.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions.                                                */
+/*===========================================================================*/
+
+/**
+ * @brief   STM32 I/O ports configuration.
+ * @details Ports A-D(E, F, G, H) clocks enabled.
+ *
+ * @param[in] config    the STM32 ports configuration
+ *
+ * @notapi
+ */
+void _pal_lld_init(const PALConfig *config)
+{
+  uint8_t i;
+
+  for (i = 0; i < TOTAL_GPIO_PADS; i++) {
+    pal_lld_setpadmode(IOPORT1, i, config->pads[i]);
+  }
+}
+
+/**
+ * @brief   Pads mode setup.
+ * @details This function programs a pads group belonging to the same port
+ *          with the specified mode.
+ *
+ * @param[in] port      the port identifier
+ * @param[in] mask      the group mask
+ * @param[in] mode      the mode
+ *
+ * @notapi
+ */
+void _pal_lld_setgroupmode(ioportid_t port,
+                           ioportmask_t mask,
+                           iomode_t mode)
+{
+  uint8_t i;
+
+  (void)mask;
+
+  for (i = 0; i < TOTAL_GPIO_PADS; i++) {
+    pal_lld_setpadmode(port, i, mode);
+  }
+}
+
+#endif /* HAL_USE_PAL == TRUE */
+
+/** @} */
-- 
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