259 lines
6.8 KiB
C
259 lines
6.8 KiB
C
/**
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*
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* \file
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*
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* \brief This module contains NMC1000 I2C protocol bus APIs implementation.
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*
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* Copyright (c) 2015 Atmel Corporation. All rights reserved.
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*
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* \asf_license_start
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*
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* \page License
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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 notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* 3. The name of Atmel may not 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 ATMEL "AS IS" AND ANY EXPRESS OR IMPLIED
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* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT ARE
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* EXPRESSLY AND SPECIFICALLY DISCLAIMED. IN NO EVENT SHALL ATMEL BE LIABLE FOR
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* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* 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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* \asf_license_stop
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*
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*/
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#include "common/include/nm_common.h"
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#ifdef CONF_WINC_USE_I2C
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#include "nmi2c.h"
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#include "bus_wrapper/include/nm_bus_wrapper.h"
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/*
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* @fn nm_i2c_read_reg_with_ret
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* @brief Read register with error code return
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* @param [in] u32Addr
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* Register address
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* @param [out] pu32RetVal
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* Pointer to u32 variable used to return the read value
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* @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
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* @author M. Abdelmawla
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* @date 11 July 2012
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* @version 1.0
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*/
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sint8 nm_i2c_read_reg_with_ret(uint32 u32Addr, uint32 *pu32RetVal)
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{
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uint8 b[6];
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uint8 rsz;
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tstrNmI2cDefault strI2c;
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sint8 s8Ret = M2M_SUCCESS;
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if (u32Addr < 0xff) { /* clockless i2c */
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b[0] = 0x09;
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b[1] = (uint8)(u32Addr);
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rsz = 1;
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strI2c.u16Sz = 2;
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} else {
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b[0] = 0x80;
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b[1] = (uint8)(u32Addr >> 24);
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b[2] = (uint8)(u32Addr >> 16);
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b[3] = (uint8)(u32Addr >> 8);
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b[4] = (uint8)(u32Addr);
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b[5] = 0x04;
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rsz = 4;
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strI2c.u16Sz = 6;
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}
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strI2c.pu8Buf = b;
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if (M2M_SUCCESS == nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c)) {
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strI2c.u16Sz = rsz;
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if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_R, &strI2c)) {
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// M2M_ERR("read error\n");
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s8Ret = M2M_ERR_BUS_FAIL;
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}
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} else {
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M2M_ERR("failed to send cfg bytes\n");
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s8Ret = M2M_ERR_BUS_FAIL;
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}
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if (rsz == 1) {
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*pu32RetVal = b[0];
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} else {
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*pu32RetVal = b[0] | ((uint32)b[1] << 8) | ((uint32)b[2] << 16) | ((uint32)b[3] << 24);
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}
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return s8Ret;
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}
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/*
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* @fn nm_i2c_read_reg
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* @brief Read register
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* @param [in] u32Addr
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* Register address
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* @return Register value
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* @author M. Abdelmawla
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* @date 11 July 2012
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* @version 1.0
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*/
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uint32 nm_i2c_read_reg(uint32 u32Addr)
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{
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uint32 val;
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nm_i2c_read_reg_with_ret(u32Addr, &val);
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return val;
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}
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/*
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* @fn nm_i2c_write_reg
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* @brief write register
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* @param [in] u32Addr
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* Register address
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* @param [in] u32Val
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* Value to be written to the register
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* @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
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* @author M. Abdelmawla
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* @date 11 July 2012
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* @version 1.0
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*/
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sint8 nm_i2c_write_reg(uint32 u32Addr, uint32 u32Val)
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{
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tstrNmI2cDefault strI2c;
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uint8 b[16];
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sint8 s8Ret = M2M_SUCCESS;
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if (u32Addr < 0xff) { /* clockless i2c */
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b[0] = 0x19;
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b[1] = (uint8)(u32Addr);
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b[2] = (uint8)(u32Val);
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strI2c.u16Sz = 3;
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} else {
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b[0] = 0x90;
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b[1] = (uint8)(u32Addr >> 24);
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b[2] = (uint8)(u32Addr >> 16);
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b[3] = (uint8)(u32Addr >> 8);
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b[4] = (uint8)u32Addr;
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b[5] = 0x04;
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b[6] = (uint8)u32Val;
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b[7] = (uint8)(u32Val >> 8);
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b[8] = (uint8)(u32Val >> 16);
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b[9] = (uint8)(u32Val >> 24);
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strI2c.u16Sz = 10;
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}
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strI2c.pu8Buf = b;
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if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c)) {
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M2M_ERR("write error\n");
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s8Ret = M2M_ERR_BUS_FAIL;
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}
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return s8Ret;
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}
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/*
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* @fn nm_i2c_read_block
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* @brief Read block of data
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* @param [in] u32Addr
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* Start address
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* @param [out] puBuf
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* Pointer to a buffer used to return the read data
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* @param [in] u16Sz
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* Number of bytes to read. The buffer size must be >= u16Sz
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* @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
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* @author M. Abdelmawla
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* @date 11 July 2012
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* @version 1.0
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*/
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sint8 nm_i2c_read_block(uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz)
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{
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tstrNmI2cDefault strI2c;
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uint8 au8Buf[7];
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sint8 s8Ret = M2M_SUCCESS;
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au8Buf[0] = 0x02;
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au8Buf[1] = (uint8)(u32Addr >> 24);
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au8Buf[2] = (uint8)(u32Addr >> 16);
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au8Buf[3] = (uint8)(u32Addr >> 8);
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au8Buf[4] = (uint8)(u32Addr >> 0);
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au8Buf[5] = (uint8)(u16Sz >> 8);
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au8Buf[6] = (uint8)(u16Sz);
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strI2c.pu8Buf = au8Buf;
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strI2c.u16Sz = sizeof(au8Buf);
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if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W, &strI2c)) {
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M2M_ERR("write error\n");
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s8Ret = M2M_ERR_BUS_FAIL;
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} else {
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strI2c.pu8Buf = pu8Buf;
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strI2c.u16Sz = u16Sz;
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if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_R, &strI2c)) {
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M2M_ERR("read error\n");
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s8Ret = M2M_ERR_BUS_FAIL;
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}
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}
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return s8Ret;
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}
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/*
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* @fn nm_i2c_write_block
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* @brief Write block of data
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* @param [in] u32Addr
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* Start address
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* @param [in] puBuf
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* Pointer to the buffer holding the data to be written
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* @param [in] u16Sz
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* Number of bytes to write. The buffer size must be >= u16Sz
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* @return M2M_SUCCESS in case of success and M2M_ERR_BUS_FAIL in case of failure
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* @author M. Abdelmawla
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* @date 11 July 2012
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* @version 1.0
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*/
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sint8 nm_i2c_write_block(uint32 u32Addr, uint8 *pu8Buf, uint16 u16Sz)
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{
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uint8 au8Buf[7];
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tstrNmI2cSpecial strI2c;
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sint8 s8Ret = M2M_SUCCESS;
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au8Buf[0] = 0x12;
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au8Buf[1] = (uint8)(u32Addr >> 24);
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au8Buf[2] = (uint8)(u32Addr >> 16);
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au8Buf[3] = (uint8)(u32Addr >> 8);
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au8Buf[4] = (uint8)(u32Addr);
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au8Buf[5] = (uint8)(u16Sz >> 8);
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au8Buf[6] = (uint8)(u16Sz);
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strI2c.pu8Buf1 = au8Buf;
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strI2c.pu8Buf2 = pu8Buf;
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strI2c.u16Sz1 = sizeof(au8Buf);
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strI2c.u16Sz2 = u16Sz;
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if (M2M_SUCCESS != nm_bus_ioctl(NM_BUS_IOCTL_W_SPECIAL, &strI2c)) {
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M2M_ERR("write error\n");
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s8Ret = M2M_ERR_BUS_FAIL;
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}
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return s8Ret;
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}
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#endif
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/* EOF */
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