302 lines
9.2 KiB
C
302 lines
9.2 KiB
C
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//###########################################################################
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//
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// FILE: F2837xD_I2C.c
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//
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// TITLE: F2837xD I2C Initialization & Support Functions.
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//
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//###########################################################################
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//
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// $Release Date: $
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// $Copyright:
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// Copyright (C) 2013-2022 Texas Instruments Incorporated - http://www.ti.com/
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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
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// are met:
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//
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// Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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//
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// 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
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// distribution.
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//
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// Neither the name of Texas Instruments Incorporated nor the names of
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// its contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// $
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//###########################################################################
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//
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// Included Files
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//
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#include "F2837xD_device.h"
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#include "F2837xD_Examples.h"
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//
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//---------------------------------------------------------------------------
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// Example: I2cAGpioConfig(), I2cBGpioConfig()
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//---------------------------------------------------------------------------
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// These functions configures GPIO pins to function as I2C pins
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//
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// Each GPIO pin can be configured as a GPIO pin or up to 3 different
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// peripheral functional pins. By default all pins come up as GPIO
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// inputs after reset.
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//
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#ifdef CPU1
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//
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// I2cAGpioConfig - Configure I2CA GPIOs
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// 'I2caDataClkPin' should be assign with one of the
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// possible I2C_A SDA - SDL GPIO pin Use defined Macros from
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// "F2837xD_I2c_defines.h" for assignment
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//
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void I2cAGpioConfig(Uint16 I2caDataClkPin)
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{
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EALLOW;
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switch(I2caDataClkPin)
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{
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case I2C_A_GPIO0_GPIO1:
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//
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// Enable internal pull-up for the selected I2C pins
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// Enable pull-up for GPIO0 (SDAA)
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// Enable pull-up for GPIO1 (SDLA)
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//
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GpioCtrlRegs.GPAPUD.bit.GPIO0 = 0;
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GpioCtrlRegs.GPAPUD.bit.GPIO1 = 0;
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//
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// Set qualification for the selected I2C pins
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// Async/no qualification (I/ps sync to SYSCLKOUT by default)
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//
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GpioCtrlRegs.GPAQSEL1.bit.GPIO0 = 3;
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GpioCtrlRegs.GPAQSEL1.bit.GPIO1 = 3;
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//
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// Configure which of the possible GPIO pins will be I2C_A pins
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// using GPIO regs
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// Configure GPIO0 for SDAA operation
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// Configure GPIO0 for SDAA operation
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//
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GpioCtrlRegs.GPAGMUX1.bit.GPIO0 = 1;
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GpioCtrlRegs.GPAMUX1.bit.GPIO0 = 2;
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//
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// Configure GPIO1 for SDLA operation
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// Configure GPIO1 for SDLA operation
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//
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GpioCtrlRegs.GPAGMUX1.bit.GPIO1 = 1;
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GpioCtrlRegs.GPAMUX1.bit.GPIO1 = 2;
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break;
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case I2C_A_GPIO32_GPIO33:
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//
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// Enable internal pull-up for the selected I2C pins
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//
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GpioCtrlRegs.GPBPUD.bit.GPIO32 = 0;
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GpioCtrlRegs.GPBPUD.bit.GPIO33 = 0;
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//
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// Set qualification for the selected I2C pins
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//
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GpioCtrlRegs.GPBQSEL1.bit.GPIO32 = 3;
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GpioCtrlRegs.GPBQSEL1.bit.GPIO33 = 3;
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//
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// Configure which of the possible GPIO pins will be I2C_A pins
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// using GPIO regs
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//
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GpioCtrlRegs.GPBMUX1.bit.GPIO32 = 1;
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GpioCtrlRegs.GPBMUX1.bit.GPIO33 = 1;
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break;
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case I2C_A_GPIO42_GPIO43:
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//
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// Enable internal pull-up for the selected I2C pins
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//
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//
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// Set qualification for the selected I2C pins
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//
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//
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// Configure which of the possible GPIO pins will be I2C_A pins
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// using GPIO regs
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//
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break;
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case I2C_A_GPIO91_GPIO92:
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//
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// Enable internal pull-up for the selected I2C pins
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//
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GpioCtrlRegs.GPCPUD.bit.GPIO91 = 0;
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GpioCtrlRegs.GPCPUD.bit.GPIO92 = 0;
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//
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// Set qualification for the selected I2C pins
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//
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GpioCtrlRegs.GPCQSEL2.bit.GPIO91 = 3;
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GpioCtrlRegs.GPCQSEL2.bit.GPIO92 = 3;
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//
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// Configure which of the possible GPIO pins will be I2C_A pins
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// using GPIO regs
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//
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GpioCtrlRegs.GPCGMUX2.bit.GPIO91 = 1;
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GpioCtrlRegs.GPCMUX2.bit.GPIO91 = 2;
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GpioCtrlRegs.GPCGMUX2.bit.GPIO92 = 1;
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GpioCtrlRegs.GPCMUX2.bit.GPIO92 = 2;
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break;
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case I2C_A_GPIO63104_GPIO105:
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//
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// Enable internal pull-up for the selected I2C pins
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//
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//
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// Set qualification for the selected I2C pins
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//
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//
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// Configure which of the possible GPIO pins will be I2C_A pins
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// using GPIO regs
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//
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break;
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default:
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break;
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} // End of Switch
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EDIS;
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}
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//
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// I2cBGpioConfig - Configure I2CB GPIOs
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// 'I2cbDataClkPin' should be assign with one of the possible
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// I2C_B SDA - SDL GPIO pin Use defined Macros from
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// "F2837xD_I2c_defines.h" for assignment
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//
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void I2cBGpioConfig(Uint16 I2cbDataClkPin)
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{
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EALLOW;
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switch(I2cbDataClkPin)
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{
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case I2C_B_GPIO2_GPIO3:
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//
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// Enable internal pull-up for the selected I2C pins
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// Enable pull-up for GPIO2 (SDAB)
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// Enable pull-up for GPIO3 (SDLB)
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//
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GpioCtrlRegs.GPAPUD.bit.GPIO2 = 0;
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GpioCtrlRegs.GPAPUD.bit.GPIO3 = 0;
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//
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// Set qualification for the selected I2C pins
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// Async/no qualification (I/ps sync to SYSCLKOUT by default)
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//
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GpioCtrlRegs.GPAQSEL1.bit.GPIO2 = 3;
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GpioCtrlRegs.GPAQSEL1.bit.GPIO3 = 3;
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//
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// Configure which of the possible GPIO pins will be I2C_B pins
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// using GPIO regs
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// Configure GPIO2 for SDAB operation
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// Configure GPIO3 for SDAB operation
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// Configure GPIO1 for SDLB operation
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// Configure GPIO1 for SDLB operation
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//
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GpioCtrlRegs.GPAGMUX1.bit.GPIO2 = 1;
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GpioCtrlRegs.GPAMUX1.bit.GPIO2 = 2;
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GpioCtrlRegs.GPAGMUX1.bit.GPIO3 = 1;
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GpioCtrlRegs.GPAMUX1.bit.GPIO3 = 2;
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break;
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case I2C_B_GPIO134_GPIO35:
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//
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// Enable internal pull-up for the selected I2C pins
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//
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//
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// Set qualification for the selected I2C pins
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//
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//
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// Configure which of the possible GPIO pins will be I2C_B pins
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// using GPIO regs
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//
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break;
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case I2C_B_GPIO40_GPIO41:
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//
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// Enable internal pull-up for the selected I2C pins
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//
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//
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// Set qualification for the selected I2C pins
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//
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//
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// Configure which of the possible GPIO pins will be I2C_B pins
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// using GPIO regs
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//
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break;
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case I2C_B_GPIO66_GPIO69:
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//
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// Enable internal pull-up for the selected I2C pins
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//
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GpioCtrlRegs.GPCPUD.bit.GPIO66 = 0; //SDAB
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GpioCtrlRegs.GPCPUD.bit.GPIO69 = 0; //SCLB
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//
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// Set qualification for the selected I2C pins
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//
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GpioCtrlRegs.GPCQSEL1.bit.GPIO66 = 3;
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GpioCtrlRegs.GPCQSEL1.bit.GPIO69 = 3;
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//
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// Configure which of the possible GPIO pins will be I2C_B pins
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// using GPIO regs
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//
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GpioCtrlRegs.GPCGMUX1.bit.GPIO66 = 1; //0x6
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GpioCtrlRegs.GPCMUX1.bit.GPIO66 = 2;
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GpioCtrlRegs.GPCGMUX1.bit.GPIO69 = 1; //0x6
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GpioCtrlRegs.GPCMUX1.bit.GPIO69 = 2;
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break;
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default:
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break;
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}
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EDIS;
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}
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#endif
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//
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// End of file
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//
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