Add bsp apollo2

1 files changed, 158 insertions, 0 deletions

diff --git a/bsp/apollo2/libraries/drivers/hal/am_hal_pdm.c b/bsp/apollo2/libraries/drivers/hal/am_hal_pdm.c
new file mode 100644
index 0000000000..45acfab995
--- /dev/null
+++ b/bsp/apollo2/libraries/drivers/hal/am_hal_pdm.c
@@ -0,0 +1,158 @@
+//*****************************************************************************
+//
+//  am_hal_pdm.c
+//! @file
+//!
+//! @brief Functions for interfacing with Pulse Density Modulation (PDM).
+//!
+//! @addtogroup pdm2 DMEMS Microphon3 (PDM)
+//! @ingroup apollo2hal
+//! @{
+//
+//*****************************************************************************
+
+//*****************************************************************************
+//
+// Copyright (c) 2017, Ambiq Micro
+// All rights reserved.
+// 
+// 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 of the copyright holder 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 HOLDER 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.
+//
+// This is part of revision 1.2.9 of the AmbiqSuite Development Package.
+//
+//*****************************************************************************
+
+#include <stdint.h>
+#include <stdbool.h>
+#include "am_mcu_apollo.h"
+
+//*****************************************************************************
+//
+//! @brief Configure the PDM module.
+//!
+//! This function reads the an \e am_hal_pdm_config_t structure and uses it to
+//! set up the PDM module.
+//!
+//! Please see the information on the am_hal_pdm_config_t configuration
+//! structure, found in am_hal_pdm.h, for more information on the parameters
+//! that may be set by this function.
+//!
+//! @return None.
+//
+//*****************************************************************************
+void
+am_hal_pdm_config(am_hal_pdm_config_t *psConfig)
+{
+    //
+    // setup the PDM PCFG register
+    //
+    AM_REG(PDM, PCFG) = psConfig->ui32PDMConfigReg;
+
+    //
+    // setup the PDM VCFG register
+    //
+    AM_REG(PDM, VCFG) = psConfig->ui32VoiceConfigReg;
+
+    //
+    // setup the PDM FIFO Threshold register
+    //
+    AM_REG(PDM, FTHR) = psConfig->ui32FIFOThreshold;
+
+    //
+    // Flush the FIFO for good measure.
+    //
+    am_hal_pdm_fifo_flush();
+}
+
+//*****************************************************************************
+//
+//! @brief Enable the PDM module.
+//!
+//! This function enables the PDM module in the mode previously defined by
+//! am_hal_pdm_config().
+//!
+//! @return None.
+//
+//*****************************************************************************
+void
+am_hal_pdm_enable(void)
+{
+    AM_REG(PDM, PCFG) |=  AM_REG_PDM_PCFG_PDMCORE_EN;
+    AM_REG(PDM, VCFG) |=  ( AM_REG_PDM_VCFG_IOCLKEN_EN      |
+                            AM_REG_PDM_VCFG_PDMCLK_EN       |
+                            AM_REG_PDM_VCFG_RSTB_NORM );
+}
+
+//*****************************************************************************
+//
+//! @brief Disable the PDM module.
+//!
+//! This function disables the PDM module.
+//!
+//! @return None.
+//
+//*****************************************************************************
+void
+am_hal_pdm_disable(void)
+{
+    AM_REG(PDM, PCFG) &= ~ AM_REG_PDM_PCFG_PDMCORE_EN;
+    AM_REG(PDM, VCFG) &= ~ (  AM_REG_PDM_VCFG_IOCLKEN_EN    |
+                              AM_REG_PDM_VCFG_PDMCLK_EN     |
+                              AM_REG_PDM_VCFG_RSTB_NORM );
+}
+
+//*****************************************************************************
+//
+//! @brief Return the PDM Interrupt status.
+//!
+//! @param bEnabledOnly - return only the enabled interrupts.
+//!
+//! Use this function to get the PDM interrupt status.
+//!
+//! @return intrrupt status
+//
+//*****************************************************************************
+uint32_t
+am_hal_pdm_int_status_get(bool bEnabledOnly)
+{
+    if ( bEnabledOnly )
+    {
+        uint32_t u32RetVal = AM_REG(PDM, INTSTAT);
+        return u32RetVal & AM_REG(PDM, INTEN);
+    }
+    else
+    {
+        return AM_REG(PDM, INTSTAT);
+    }
+}
+
+//*****************************************************************************
+//
+//  End the doxygen group
+//! @}
+//
+//*****************************************************************************