From 91e635b08a57e44ce1f7deb0328a5ae78117f8d4 Mon Sep 17 00:00:00 2001
From: Fabien Poussin <fabien.poussin@gmail.com>
Date: Tue, 8 Jan 2019 20:02:45 +0100
Subject: Adding rudimentary OPAMP Driver

---
 os/hal/src/hal_opamp.c | 155 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 155 insertions(+)
 create mode 100644 os/hal/src/hal_opamp.c

(limited to 'os/hal/src')

diff --git a/os/hal/src/hal_opamp.c b/os/hal/src/hal_opamp.c
new file mode 100644
index 0000000..ba718a7
--- /dev/null
+++ b/os/hal/src/hal_opamp.c
@@ -0,0 +1,155 @@
+/*
+    ChibiOS - Copyright (C) 2006..2019 Giovanni Di Sirio
+              Copyright (C) 2019 Fabien Poussin (fabien.poussin (at) google's mail)
+
+    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    hal_opamp.c
+ * @brief   OPAMP Driver code.
+ *
+ * @addtogroup OPAMP
+ * @{
+ */
+
+#include "hal_opamp.h"
+
+#if HAL_USE_OPAMP || defined(__DOXYGEN__)
+
+
+/*===========================================================================*/
+/* Driver local definitions.                                                 */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported variables.                                                */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local variables and types.                                         */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver local functions.                                                   */
+/*===========================================================================*/
+
+/*===========================================================================*/
+/* Driver exported functions.                                                */
+/*===========================================================================*/
+
+/**
+ * @brief   OPAMP Driver initialization.
+ * @note    This function is implicitly invoked by @p halInit(), there is
+ *          no need to explicitly initialize the driver.
+ *
+ * @init
+ */
+void opampInit(void) {
+
+  opamp_lld_init();
+}
+
+/**
+ * @brief   Initializes the standard part of a @p OPAMPDriver structure.
+ *
+ * @param[out] opampp     pointer to the @p OPAMPDriver object
+ *
+ * @init
+ */
+void opampObjectInit(OPAMPDriver *opampp) {
+
+  opampp->state  = OPAMP_STOP;
+  opampp->config = NULL;
+}
+
+/**
+ * @brief   Configures and activates the OPAMP peripheral.
+ *
+ * @param[in] opampp      pointer to the @p OPAMPDriver object
+ * @param[in] config    pointer to the @p OPAMPConfig object
+ *
+ * @api
+ */
+void opampStart(OPAMPDriver *opampp, const OPAMPConfig *config) {
+
+  osalDbgCheck((opampp != NULL) && (config != NULL));
+
+  osalSysLock();
+  osalDbgAssert((opampp->state == OPAMP_STOP) || (opampp->state == OPAMP_READY),
+              "invalid state");
+  opampp->config = config;
+  opamp_lld_start(opampp);
+  opampp->state = OPAMP_READY;
+  osalSysUnlock();
+}
+
+/**
+ * @brief   Deactivates the OPAMP peripheral.
+ *
+ * @param[in] opampp      pointer to the @p OPAMPDriver object
+ *
+ * @api
+ */
+void opampStop(OPAMPDriver *opampp) {
+
+  osalDbgCheck(opampp != NULL);
+
+  osalSysLock();
+  osalDbgAssert((opampp->state == OPAMP_STOP) || (opampp->state == OPAMP_READY),
+              "invalid state");
+  opamp_lld_stop(opampp);
+  opampp->state = OPAMP_STOP;
+  osalSysUnlock();
+}
+
+/**
+ * @brief   Activates the opamp.
+ *
+ * @param[in] opampp      pointer to the @p OPAMPDriver object
+ *
+ * @api
+ */
+void opampEnable(OPAMPDriver *opampp) {
+
+  osalDbgCheck(opampp != NULL);
+
+  osalSysLock();
+  osalDbgAssert(opampp->state == OPAMP_READY, "invalid state");
+  opamp_lld_enable(opampp);
+  opampp->state = OPAMP_ACTIVE;
+  osalSysUnlock();
+}
+
+/**
+ * @brief   Deactivates the opamp.
+ *
+ * @param[in] opampp      pointer to the @p OPAMPDriver object
+ *
+ * @api
+ */
+void opampDisable(OPAMPDriver *opampp) {
+
+  osalDbgCheck(opampp != NULL);
+
+  osalSysLock();
+  osalDbgAssert((opampp->state == OPAMP_READY) || (opampp->state == OPAMP_ACTIVE),
+             "invalid state");
+  opamp_lld_disable(opampp);
+  opampp->state = OPAMP_READY;
+  osalSysUnlock();
+}
+
+#endif /* HAL_USE_OPAMP */
+
+/** @} */
-- 
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