at24md.c 文件参考

中等密度(32Ki/64Ki/128Ki/256Ki/512Ki/1Mi/2Mi bits)EEPROM驱动 更多...

#include <xwos/standard.h>
#include <string.h>
#include <xwcd/ds/device.h>
#include <xwcd/ds/soc/gpio.h>
#include <xwcd/ds/i2c/peripheral.h>
#include <xwcd/peripheral/i2c/eeprom/device.h>
#include <xwcd/peripheral/i2c/eeprom/driver.h>

at24md.c 的引用(Include)关系图:

浏览源代码.

函数
static xwer_t	at24md_putc (struct xwds_eeprom *eeprom, xwu8_t data, xwsq_t addr, xwtm_t to)
static xwer_t	at24md_getc (struct xwds_eeprom *eeprom, xwu8_t *buf, xwsq_t addr, xwtm_t to)
static xwer_t	at24md_pgwrite (struct xwds_eeprom *eeprom, xwu8_t *data, xwsz_t *size, xwsq_t pgidx, xwtm_t to)
static xwer_t	at24md_pgread (struct xwds_eeprom *eeprom, xwu8_t *buf, xwsz_t *size, xwsq_t pgidx, xwtm_t to)

变量
const struct xwds_eeprom_driver	at24md_drv

详细描述

中等密度(32Ki/64Ki/128Ki/256Ki/512Ki/1Mi/2Mi bits)EEPROM驱动

作者

• 隐星魂 (Roy Sun) xwos@.nosp@m.xwos.nosp@m..tech

版权所有

• Copyright © 2015 xwos.tech, All Rights Reserved.

  ‍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.

在文件 at24md.c 中定义.

函数说明

at24md_getc()

static xwer_t at24md_getc ( struct xwds_eeprom *  eeprom, xwu8_t *  buf, xwsq_t  addr, xwtm_t  to  )

static

<No error

在文件 at24md.c 第 92 行定义.

{
        struct xwds_i2cm * bus;
        struct xwds_i2c_msg msg;
        xwer_t rc;
        xwu8_t txdata[2];
        xwu16_t i2cpaddr;
 
        i2cpaddr = eeprom->i2cp.addr;
        bus = eeprom->i2cp.bus;
        txdata[0] = (xwu8_t)((addr >> (xwsq_t)8) & (xwu8_t)0xFF);
        txdata[1] = (xwu8_t)(addr & (xwu8_t)0xFF);
        msg.addr = ((i2cpaddr & (xwu16_t)0x00F0) |
                    (((addr >> (xwsq_t)16) & (xwu16_t)0x7) << (xwu16_t)1));
        msg.flag = ((xwu16_t)XWDS_I2C_F_START | (xwu16_t)XWDS_I2C_F_WR);
        msg.data = txdata;
        msg.size = 2;
        rc = xwds_i2cm_xfer(bus, &msg, to);
        if (XWOK == rc) {
                msg.addr = ((i2cpaddr & (xwu16_t)0x00F0) |
                            (((addr >> (xwsq_t)16) & (xwu16_t)0x7) << (xwu16_t)1));
                msg.flag = ((xwu16_t)XWDS_I2C_F_START |
                            (xwu16_t)XWDS_I2C_F_RD |
                            (xwu16_t)XWDS_I2C_F_STOP);
                msg.data = buf;
                msg.size = 1;
                rc = xwds_i2cm_xfer(bus, &msg, to);
        }
        return rc;
}

函数调用图:

at24md_pgread()

static xwer_t at24md_pgread ( struct xwds_eeprom *  eeprom, xwu8_t *  buf, xwsz_t *  size, xwsq_t  pgidx, xwtm_t  to  )

static

<No error

<No error

在文件 at24md.c 第 159 行定义.

{
        struct xwds_i2cm * bus;
        const struct xwds_eeprom_parameter * parameter;
        struct xwds_i2c_msg msg;
        xwer_t rc;
        xwu16_t i2cpaddr;
        xwsq_t addr;
        xwsz_t rdsz = *size;
        xwu8_t txdata[2];
 
        i2cpaddr = eeprom->i2cp.addr;
        bus = eeprom->i2cp.bus;
        parameter = &eeprom->parameter;
        addr = ((pgidx * parameter->page_size) & (xwsq_t)0x7FFFF);
        txdata[0] = (xwu8_t)((addr >> (xwsq_t)8) & (xwu8_t)0xFF);
        txdata[1] = (xwu8_t)(addr & (xwu8_t)0xFF);
        msg.addr = ((i2cpaddr & (xwu16_t)0x00F0) |
                    (((addr >> (xwsq_t)16) & (xwu16_t)0x7) << (xwu16_t)1));
        msg.flag = ((xwu16_t)XWDS_I2C_F_START | (xwu16_t)XWDS_I2C_F_WR);
        msg.data = txdata;
        msg.size = 2;
        rc = xwds_i2cm_xfer(bus, &msg, to);
        if (XWOK == rc) {
                msg.addr = ((i2cpaddr & (xwu16_t)0x00F0) |
                            (((addr >> (xwsq_t)16) & (xwu16_t)0x7) << (xwu16_t)1));
                msg.flag = ((xwu16_t)XWDS_I2C_F_START |
                            (xwu16_t)XWDS_I2C_F_RD |
                            (xwu16_t)XWDS_I2C_F_STOP);
                msg.data = buf;
                msg.size = rdsz;
                rc = xwds_i2cm_xfer(bus, &msg, to);
                if (XWOK == rc) {
                        *size = msg.size;
                } else {
                        *size = 0;
                }
        } else {
                *size = 0;
        }
        return rc;
}

函数调用图:

at24md_pgwrite()

static xwer_t at24md_pgwrite ( struct xwds_eeprom *  eeprom, xwu8_t *  data, xwsz_t *  size, xwsq_t  pgidx, xwtm_t  to  )

static

在文件 at24md.c 第 124 行定义.

{
        struct xwds_i2cm * bus;
        const struct xwds_eeprom_parameter * parameter;
        struct xwds_i2c_msg msg;
        xwer_t rc;
        xwu16_t i2cpaddr;
        xwsq_t addr;
        xwsz_t wrsz = *size;
        xwu8_t txdata[wrsz + 2];
 
        i2cpaddr = eeprom->i2cp.addr;
        bus = eeprom->i2cp.bus;
        parameter = &eeprom->parameter;
        addr = ((pgidx * parameter->page_size) & (xwsq_t)0x7FFFF);
        txdata[0] = (xwu8_t)((addr >> (xwsq_t)8) & (xwu8_t)0xFF);
        txdata[1] = (xwu8_t)(addr & (xwu8_t)0xFF);
        memcpy(&txdata[2], data, wrsz);
        msg.addr = ((i2cpaddr & (xwu16_t)0x00F0) |
                    (((addr >> (xwsq_t)16) & (xwu16_t)0x7) << (xwu16_t)1));
        msg.flag = ((xwu16_t)XWDS_I2C_F_START |
                    (xwu16_t)XWDS_I2C_F_WR |
                    (xwu16_t)XWDS_I2C_F_STOP);
        msg.data = txdata;
        msg.size = wrsz + 2;
        rc = xwds_i2cm_xfer(bus, &msg, to);
        if (rc < 0) {
                *size = 0;
        }
        return rc;
}

函数调用图:

at24md_putc()

static xwer_t at24md_putc ( struct xwds_eeprom *  eeprom, xwu8_t  data, xwsq_t  addr, xwtm_t  to  )

static

在文件 at24md.c 第 67 行定义.

{
        struct xwds_i2cm * bus;
        struct xwds_i2c_msg msg;
        xwer_t rc;
        xwu8_t txdata[3];
        xwu16_t i2cpaddr;
 
        i2cpaddr = eeprom->i2cp.addr;
        bus = eeprom->i2cp.bus;
        txdata[0] = (xwu8_t)((addr >> (xwsq_t)8) & (xwu8_t)0xFF);
        txdata[1] = (xwu8_t)(addr & (xwu8_t)0xFF);
        txdata[2] = data;
        msg.addr = ((i2cpaddr & (xwu16_t)0x00F0) |
                    (((addr >> (xwsq_t)16) & (xwu16_t)0x7) << (xwu16_t)1));
        msg.flag = ((xwu16_t)XWDS_I2C_F_START |
                    (xwu16_t)XWDS_I2C_F_WR |
                    (xwu16_t)XWDS_I2C_F_STOP);
        msg.data = txdata;
        msg.size = sizeof(txdata);
        rc = xwds_i2cm_xfer(bus, &msg, to);
        return rc;
}

函数调用图:

变量说明

at24md_drv

const struct xwds_eeprom_driver at24md_drv

初始值:

= {
        .i2cp = {
                .base = {
                        .name = "xwds.eeprom",
                        .probe =  ((void *)0) ,
                        .remove =  ((void *)0) ,
                        .start = xwds_eeprom_drv_start,
                        .stop = xwds_eeprom_drv_stop,
 
                        .suspend = xwds_eeprom_drv_suspend,
                        .resume =  xwds_eeprom_drv_resume,
 
                },
        },
        .putc = at24md_putc,
        .getc = at24md_getc,
        .pgwrite = at24md_pgwrite,
        .pgread = at24md_pgread,
}

在文件 at24md.c 第 46 行定义.