359 lines
16 KiB
C
359 lines
16 KiB
C
//*****************************************************************************
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//
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// am_hal_ios.h
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//! @file
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//!
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//! @brief Functions for interfacing with the IO Slave module
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//!
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//! @addtogroup ios1 IO Slave (SPI/I2C)
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//! @ingroup apollo1hal
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//! @{
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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// Copyright (c) 2020, Ambiq Micro
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// All rights reserved.
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are met:
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//
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// 1. Redistributions of source code must retain the above copyright notice,
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// this list of conditions and the following disclaimer.
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//
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// 2. Redistributions in binary form must reproduce the above copyright
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// notice, this list of conditions and the following disclaimer in the
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// documentation and/or other materials provided with the distribution.
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//
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// 3. Neither the name of the copyright holder nor the names of its
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// contributors may be used to endorse or promote products derived from this
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// software without specific prior written permission.
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//
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// Third party software included in this distribution is subject to the
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// additional license terms as defined in the /docs/licenses directory.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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// POSSIBILITY OF SUCH DAMAGE.
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//
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// This is part of revision 2.4.2 of the AmbiqSuite Development Package.
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//
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//*****************************************************************************
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#ifndef AM_HAL_IOS_H
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#define AM_HAL_IOS_H
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//*****************************************************************************
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//
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//! @name Interface Configuration
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//! @brief Macro definitions for configuring the physical interface of the IO
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//! Slave
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//!
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//! These macros may be used with the am_hal_ios_config_t structure to set the
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//! physical parameters of the SPI/I2C slave module.
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//!
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//! @{
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//
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//*****************************************************************************
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#define AM_HAL_IOS_USE_SPI AM_REG_IOSLAVE_CFG_IFCSEL_SPI
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#define AM_HAL_IOS_SPIMODE_0 AM_REG_IOSLAVE_CFG_SPOL_SPI_MODES_0_3
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#define AM_HAL_IOS_SPIMODE_1 AM_REG_IOSLAVE_CFG_SPOL_SPI_MODES_1_2
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#define AM_HAL_IOS_SPIMODE_2 AM_REG_IOSLAVE_CFG_SPOL_SPI_MODES_1_2
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#define AM_HAL_IOS_SPIMODE_3 AM_REG_IOSLAVE_CFG_SPOL_SPI_MODES_0_3
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#define AM_HAL_IOS_USE_I2C AM_REG_IOSLAVE_CFG_IFCSEL_I2C
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#define AM_HAL_IOS_I2C_ADDRESS(n) AM_REG_IOSLAVE_CFG_I2CADDR(n)
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#define AM_HAL_IOS_LSB_FIRST AM_REG_IOSLAVE_CFG_LSB(1)
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//! @}
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//*****************************************************************************
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//
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//! @name Register Access Interrupts
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//! @brief Macro definitions for register access interrupts.
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//!
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//! These macros may be used with any of the
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//!
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//! @{
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//
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//*****************************************************************************
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#define AM_HAL_IOS_ACCESS_INT_00 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 31)
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#define AM_HAL_IOS_ACCESS_INT_01 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 30)
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#define AM_HAL_IOS_ACCESS_INT_02 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 29)
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#define AM_HAL_IOS_ACCESS_INT_03 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 28)
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#define AM_HAL_IOS_ACCESS_INT_04 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 27)
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#define AM_HAL_IOS_ACCESS_INT_05 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 26)
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#define AM_HAL_IOS_ACCESS_INT_06 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 25)
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#define AM_HAL_IOS_ACCESS_INT_07 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 24)
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#define AM_HAL_IOS_ACCESS_INT_08 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 23)
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#define AM_HAL_IOS_ACCESS_INT_09 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 22)
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#define AM_HAL_IOS_ACCESS_INT_0A AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 21)
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#define AM_HAL_IOS_ACCESS_INT_0B AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 20)
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#define AM_HAL_IOS_ACCESS_INT_0C AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 19)
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#define AM_HAL_IOS_ACCESS_INT_0D AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 18)
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#define AM_HAL_IOS_ACCESS_INT_0E AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 17)
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#define AM_HAL_IOS_ACCESS_INT_0F AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 16)
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#define AM_HAL_IOS_ACCESS_INT_13 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 15)
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#define AM_HAL_IOS_ACCESS_INT_17 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 14)
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#define AM_HAL_IOS_ACCESS_INT_1B AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 13)
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#define AM_HAL_IOS_ACCESS_INT_1F AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 12)
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#define AM_HAL_IOS_ACCESS_INT_23 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 11)
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#define AM_HAL_IOS_ACCESS_INT_27 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 10)
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#define AM_HAL_IOS_ACCESS_INT_2B AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 9)
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#define AM_HAL_IOS_ACCESS_INT_2F AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 8)
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#define AM_HAL_IOS_ACCESS_INT_33 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 7)
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#define AM_HAL_IOS_ACCESS_INT_37 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 6)
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#define AM_HAL_IOS_ACCESS_INT_3B AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 5)
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#define AM_HAL_IOS_ACCESS_INT_3F AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 4)
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#define AM_HAL_IOS_ACCESS_INT_43 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 3)
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#define AM_HAL_IOS_ACCESS_INT_47 AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 2)
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#define AM_HAL_IOS_ACCESS_INT_4B AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 1)
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#define AM_HAL_IOS_ACCESS_INT_4F AM_REG_IOSLAVE_REGACCINTEN_REGACC((uint32_t)1 << 0)
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#define AM_HAL_IOS_ACCESS_INT_ALL 0xFFFFFFFF
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//! @}
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//*****************************************************************************
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//
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//! @name I/O Slave Interrupts
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//! @brief Macro definitions for I/O slave (IOS) interrupts.
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//!
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//! These macros may be used with any of the
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//!
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//! @{
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//
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//*****************************************************************************
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#define AM_HAL_IOS_INT_FSIZE AM_REG_IOSLAVE_INTEN_FSIZE_M
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#define AM_HAL_IOS_INT_FOVFL AM_REG_IOSLAVE_INTEN_FOVFL_M
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#define AM_HAL_IOS_INT_FUNDFL AM_REG_IOSLAVE_INTEN_FUNDFL_M
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#define AM_HAL_IOS_INT_FRDERR AM_REG_IOSLAVE_INTEN_FRDERR_M
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#define AM_HAL_IOS_INT_GENAD AM_REG_IOSLAVE_INTEN_GENAD_M
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#define AM_HAL_IOS_INT_IOINTW AM_REG_IOSLAVE_INTEN_IOINTW_M
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#define AM_HAL_IOS_INT_ALL 0xFFFFFFFF
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//! @}
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//*****************************************************************************
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//
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//! @name I/O Slave Interrupts triggers
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//! @brief Macro definitions for I/O slave (IOS) interrupts.
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//!
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//! These macros may be used with am_hal_ios_int_set and am_hal_ios_int_clear
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//!
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//! @{
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//
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//*****************************************************************************
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#define AM_HAL_IOS_IOINTCTL_INT0 (0x01)
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#define AM_HAL_IOS_IOINTCTL_INT1 (0x02)
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#define AM_HAL_IOS_IOINTCTL_INT2 (0x04)
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#define AM_HAL_IOS_IOINTCTL_INT3 (0x08)
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#define AM_HAL_IOS_IOINTCTL_INT4 (0x10)
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#define AM_HAL_IOS_IOINTCTL_INT5 (0x20)
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//! @}
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//*****************************************************************************
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//
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// External variable definitions
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//
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//*****************************************************************************
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//*****************************************************************************
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//
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//! @brief LRAM pointer
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//!
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//! Pointer to the base of the IO Slave LRAM.
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//
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//*****************************************************************************
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extern volatile uint8_t * const am_hal_ios_pui8LRAM;
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//*****************************************************************************
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//
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//! @brief Configuration structure for the IO slave module.
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//!
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//! This structure may be used along with the am_hal_ios_config() function to
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//! select key parameters of the IO Slave module. See the descriptions of each
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//! parameter within this structure for more information on what they control.
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//
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//*****************************************************************************
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typedef struct
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{
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//
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//! Interface Selection
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//!
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//! This word selects the physical behavior of the IO Slave port. For SPI
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//! mode, this word should be the logical OR of one or more of the
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//! following:
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//!
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//! AM_HAL_IOS_USE_SPI
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//! AM_HAL_IOS_SPIMODE_0
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//! AM_HAL_IOS_SPIMODE_1
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//! AM_HAL_IOS_SPIMODE_2
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//! AM_HAL_IOS_SPIMODE_3
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//!
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//! For I2C mode, use the logical OR of one or more of these values instead
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//! (where n is the 7 or 10-bit I2C address to use):
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//!
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//! AM_HAL_IOS_USE_I2C
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//! AM_HAL_IOS_I2C_ADDRESS(n)
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//!
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//! Also, in any mode, you may OR in this value to reverse the order of
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//! incoming data bits.
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//!
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//! AM_HAL_IOS_LSB_FIRST
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//
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uint32_t ui32InterfaceSelect;
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//
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//! Read-Only section
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//!
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//! The IO Slave LRAM is split into three main sections. The first section
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//! is a "Direct Write" section, which may be accessed for reads or write
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//! either directly through the Apollo CPU, or over the SPI/I2C bus. The
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//! "Direct Write" section always begins at LRAM offset 0x0. At the end of
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//! the normal "Direct Write" space, there is a "Read Only" space, which is
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//! read/write accessible to the Apollo CPU, but read-only over the I2C/SPI
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//! Bus. This word selects the base address of this "Read Only" space.
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//!
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//! This value may be set to any multiple of 8 between 0x0 and 0x78,
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//! inclusive. For the configuration to be valid, \e ui32ROBase must also
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//! be less than or equal to \e ui32FIFOBase
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//!
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//! @note The address given here is in units of BYTES. Since the location
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//! of the "Read Only" space may only be set in 8-byte increments, this
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//! value must be a multiple of 8.
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//!
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//! For the avoidance of doubt this means 0x80 is 128 bytes. These functions
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//! will shift right by 8 internally.
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//
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uint32_t ui32ROBase;
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//
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//! FIFO section
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//!
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//! After the "Direct Access" and "Read Only" sections is a section of LRAM
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//! allocated to a FIFO. This section is accessible by the Apollo CPU
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//! through the FIFO control registers, and accessible on the SPI/I2C bus
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//! through the 0x7F address. This word selects the base address of the
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//! FIFO space. The FIFO will extend from the address specified here to the
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//! address specified in \e ui32RAMBase.
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//!
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//! This value may be set to any multiple of 8 between 0x0 and 0x78,
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//! inclusive. For the configuration to be valid, \e ui32FIFOBase must also
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//! be greater than or equal to \e ui32ROBase.
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//!
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//! @note The address given here is in units of BYTES. Since the location
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//! of the "FIFO" space may only be set in 8-byte increments, this value
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//! must be a multiple of 8.
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//!
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//! For the avoidance of doubt this means 0x80 is 128 bytes. These functions
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//! will shift right by 8 internally.
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//
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uint32_t ui32FIFOBase;
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//
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//! RAM section
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//!
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//! At the end of the IOS LRAM, the user may allocate a "RAM" space that
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//! can only be accessed by the Apollo CPU. This space will not interact
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//! with the SPI/I2C bus at all, and may be used as general-purpose memory.
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//! Unlike normal SRAM, this section of LRAM will retain its state through
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//! Deep Sleep, so it may be used as a data retention space for
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//! ultra-low-power applications.
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//!
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//! This value may be set to any multiple of 8 between 0x0 and 0x100,
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//! inclusive. For the configuration to be valid, \e ui32RAMBase must also
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//! be greater than or equal to \e ui32FIFOBase.
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//!
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//! @note The address given here is in units of BYTES. Since the location
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//! of the "FIFO" space may only be set in 8-byte increments, this value
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//! must be a multiple of 8.
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//!
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//! For the avoidance of doubt this means 0x80 is 128 bytes. These functions
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//! will shift right by 8 internally.
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//
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uint32_t ui32RAMBase;
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//
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//! FIFO threshold
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//!
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//! The IO Slave module will trigger an interrupt when the number of
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//! entries in the FIFO drops below this number of bytes.
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//
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uint32_t ui32FIFOThreshold;
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//
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// Pointer to an SRAM
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//
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uint8_t *pui8SRAMBuffer;
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}
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am_hal_ios_config_t;
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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//*****************************************************************************
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//
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// External function definitions
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//
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//*****************************************************************************
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extern void am_hal_ios_enable(uint32_t ui32Module);
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extern void am_hal_ios_disable(uint32_t ui32Module);
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// these interrupts drive the HOST side IOS interrupt pins
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extern void am_hal_ios_host_int_set(uint32_t ui32Interrupt);
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extern void am_hal_ios_host_int_clear(uint32_t ui32Interrupt);
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extern uint32_t am_hal_ios_host_int_get(void);
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extern uint32_t am_hal_ios_host_int_enable_get(void);
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extern void am_hal_ios_lram_write(uint32_t ui32Offset, uint8_t ui8Value);
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extern uint8_t am_hal_ios_lram_read(uint32_t ui32Offset);
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// the following interrupts go back to the NVIC
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extern void am_hal_ios_config(am_hal_ios_config_t *psConfig);
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extern void am_hal_ios_access_int_enable(uint32_t ui32Interrupt);
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extern uint32_t am_hal_ios_access_int_enable_get(void);
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extern void am_hal_ios_access_int_disable(uint32_t ui32Interrupt);
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extern void am_hal_ios_access_int_clear(uint32_t ui32Interrupt);
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extern void am_hal_ios_access_int_set(uint32_t ui32Interrupt);
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extern uint32_t am_hal_ios_access_int_status_get(bool bEnabledOnly);
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extern void am_hal_ios_int_enable(uint32_t ui32Interrupt);
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extern uint32_t am_hal_ios_int_enable_get(void);
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extern void am_hal_ios_int_disable(uint32_t ui32Interrupt);
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extern void am_hal_ios_int_clear(uint32_t ui32Interrupt);
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extern void am_hal_ios_int_set(uint32_t ui32Interrupt);
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extern uint32_t am_hal_ios_int_status_get(bool bEnabledOnly);
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extern void am_hal_ios_fifo_buffer_init(uint8_t *pui8Buffer, uint32_t ui32NumBytes);
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extern uint32_t am_hal_ios_fifo_space_left(void);
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extern uint32_t am_hal_ios_fifo_space_used(void);
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extern void am_hal_ios_fifo_service(uint32_t ui32Status);
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// Returns the number of bytes actually written
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extern uint32_t am_hal_ios_fifo_write(uint8_t *pui8Data, uint32_t ui32NumBytes);
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extern void am_hal_ios_fifo_write_simple(uint8_t *pui8Data,
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uint32_t ui32NumBytes);
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extern void am_hal_ios_fifo_ptr_set(uint32_t ui32Offset);
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extern void am_hal_ios_update_fifoctr(void);
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extern void am_hal_ios_read_poll_complete(void);
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#ifdef __cplusplus
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}
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#endif
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#endif // AM_HAL_IOS_H
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//*****************************************************************************
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//
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// End Doxygen group.
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//! @}
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//
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//*****************************************************************************
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