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ADS7142: 我们项目使用ADS7142IRUGR这颗料需要一些东西

Tonyx.wu
Expert 1910 points
Part Number: ADS7142


我们项目使用ADS7142IRUGR这颗料，麻烦提供下高通平台的驱动代码，谢谢！

  • 0
    TI__Guru**** 185470 points

    您好，

    非常抱歉，没有高通平台的驱动代码提供给您，在 ADS7142 产品首页 --- 设计和开发---软件开发 处提供了 ADS7142 Device Functional Modes Firmware (Rev. A)，希望对您有帮助：https://www.ti.com.cn/cn/lit/zip/sbac201

    另外，我在E2E 英文论坛看到类似的问题，您可以等待并查看 E2E论坛工程师的回复，看那边是否可以提供更好的建议：

    https://e2e.ti.com/support/data-converters-group/data-converters/f/data-converters-forum/1076428/ads7142-drive-code?tisearch=e2e-sitesearch&keymatch=ADS7142#

  • 0 回复 Amy Luo
    Expert 1910 points

    1.请教下，忙/Rdy和警报这两个脚是不是不需要控制？

    2.这个代码，帮忙确认下，该用哪个模式的？

  • 0 回复 Tonyx.wu
    Expert 1910 points

    问题1应该是“请教下，busy/rdy和alert这两个脚是不是不需要控制？”

  • 0 回复 Tonyx.wu
    TI__Guru**** 185470 points

    1、这两个管脚是数字输出管脚，

      BUSY/RDY ：当设备按顺序扫描通道时，将该引脚拉高，当顺序完成或中止时，将该引脚拉低。

    ALERT：低电平有效，OD输出。该引脚的状态由数字窗口比较器块控制。外接上拉电阻至 DVDD。

    您说的控制具体是什么意思？

    2、这2个.c文件以 High Precision Mode命名，应该是High Precision 模式。

  • 0 回复 Amy Luo
    Expert 1910 points

    请帮忙解答一下这个问题

  • 0 回复 Tonyx.wu
    TI__Guru**** 185470 points

    是每通道的16个转换结果的累加值，具体参看datasheet 7.3.8 Accumulator部分。

  • 0 回复 Amy Luo
    Prodigy 30 points

    请问下这个LSB和MSB是什么意思，是代表采集到的ch0和ch1的电压值吗？怎么可以获取到ch0和ch1采集的电压值？

  • 0 回复 ge gavin
    TI__Guru**** 185470 points

    1、LSB（Least Significant Byte）低位字节，MSB Most Significant Byte 高位字节，08h 09h是一个数据，是16位的，分2个字节，一个高位字节在09h一个低位字节在08h；

    2、是ch0和ch1的16个转换结果的累加值；

    3、需要工作在Autonomous模式，具体请查看数据手册 7.3.7 Data Buffer

  • 0 回复 Amy Luo
    Prodigy 30 points

    Hi Amy，

    我使用Autonomous stopburst模式，采集ch0电压， 读32个Data Buffer数据，数据0（0x8b）是MSB？ 数据1（d1）是LSB?，完整数据是0x8bd1(35793)?

    0x8bd1是采集到的ch0的电压值？这个数据应该还要转化吧，该怎么转化呢？（实际我使用万用表量出来是0.932V）

    下面是我的寄存器设置，请帮忙check下

    [ 57.762777] ads7142: get_adc_data: ads7142 get_adc_data
    [ 57.762824] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x17 data = 0xa
    [ 57.763185] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x14 data = 0x1
    [ 57.763389] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x17 data = 0x0
    [ 57.778066] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x1f data = 0x1
    [ 57.778301] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x15 data = 0x1
    [ 57.778501] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x24 data = 0x3
    [ 57.778936] ads7142: ads7142_read_reg: opcode = 0x10 reg = 0x24 data: 0x3
    [ 57.778943] ads7142: get_adc_data: ads7142 get channelconfig 0x3
    [ 57.778956] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x1c data = 0x6
    [ 57.779386] ads7142: ads7142_read_reg: opcode = 0x10 reg = 0x1c data: 0x6
    [ 57.779394] ads7142: get_adc_data: ads7142 get opmodeselconfig 0x6
    [ 57.779636] ads7142: ads7142_read_reg: opcode = 0x10 reg = 0x0 data: 0x2
    [ 57.779644] ads7142: get_adc_data: ads7142 get opmodei2cconfig 0x2
    [ 57.779656] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x20 data = 0x1
    [ 57.780086] ads7142: ads7142_read_reg: opcode = 0x10 reg = 0x20 data: 0x1
    [ 57.780093] ads7142: get_adc_data: ads7142 get autoseqchenconfig 0x1
    [ 57.780106] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x18 data = 0x0
    [ 57.780535] ads7142: ads7142_read_reg: opcode = 0x10 reg = 0x18 data: 0x0
    [ 57.780543] ads7142: get_adc_data: ads7142 get oscconfig 0x0
    [ 57.780554] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x19 data = 0x15
    [ 57.780984] ads7142: ads7142_read_reg: opcode = 0x10 reg = 0x19 data: 0x15
    [ 57.780990] ads7142: get_adc_data: ads7142 get nCLKconfig 0x15
    [ 57.781003] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x28 data = 0x2
    [ 57.781203] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x2c data = 0x0
    [ 57.781404] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x1e data = 0x1
    [ 57.781603] ads7142: ads7142_write_reg: ads7142_write_reg opcode = 0x8 reg = 0x1f data = 0x1
    [ 57.782033] ads7142: ads7142_read_reg: opcode = 0x10 reg = 0x1 data: 0x10
    [ 57.782041] ads7142: get_adc_data: ads7142 get databufferstatus 16
    [ 57.782048] ads7142: get_adc_data: ads7142 busy/rdy status 0
    [ 57.783071] ads7142: ads7142_read: i = 0 date = 0x8b
    [ 57.783075] ads7142: ads7142_read: i = 1 date = 0xd1
    [ 57.783078] ads7142: ads7142_read: i = 2 date = 0x8b
    [ 57.783082] ads7142: ads7142_read: i = 3 date = 0xe1
    [ 57.783086] ads7142: ads7142_read: i = 4 date = 0x8b
    [ 57.783089] ads7142: ads7142_read: i = 5 date = 0xe1
    [ 57.783092] ads7142: ads7142_read: i = 6 date = 0x8b
    [ 57.783096] ads7142: ads7142_read: i = 7 date = 0xe1
    [ 57.783099] ads7142: ads7142_read: i = 8 date = 0x8b
    [ 57.783103] ads7142: ads7142_read: i = 9 date = 0xe1
    [ 57.783106] ads7142: ads7142_read: i = 10 date = 0x8b
    [ 57.783110] ads7142: ads7142_read: i = 11 date = 0xe1
    [ 57.783113] ads7142: ads7142_read: i = 12 date = 0x8b
    [ 57.783117] ads7142: ads7142_read: i = 13 date = 0xe1
    [ 57.783120] ads7142: ads7142_read: i = 14 date = 0x8b
    [ 57.783123] ads7142: ads7142_read: i = 15 date = 0xe1
    [ 57.783126] ads7142: ads7142_read: i = 16 date = 0x8b
    [ 57.783130] ads7142: ads7142_read: i = 17 date = 0xf1
    [ 57.783133] ads7142: ads7142_read: i = 18 date = 0x8b
    [ 57.783137] ads7142: ads7142_read: i = 19 date = 0xf1
    [ 57.783140] ads7142: ads7142_read: i = 20 date = 0x8b
    [ 57.783143] ads7142: ads7142_read: i = 21 date = 0xe1
    [ 57.783146] ads7142: ads7142_read: i = 22 date = 0x8b
    [ 57.783150] ads7142: ads7142_read: i = 23 date = 0xf1
    [ 57.783153] ads7142: ads7142_read: i = 24 date = 0x8b
    [ 57.783157] ads7142: ads7142_read: i = 25 date = 0xe1
    [ 57.783160] ads7142: ads7142_read: i = 26 date = 0x8b
    [ 57.783164] ads7142: ads7142_read: i = 27 date = 0xe1
    [ 57.783167] ads7142: ads7142_read: i = 28 date = 0x8b
    [ 57.783171] ads7142: ads7142_read: i = 29 date = 0xd1
    [ 57.783173] ads7142: ads7142_read: i = 30 date = 0x8b
    [ 57.783177] ads7142: ads7142_read: i = 31 date = 0xf1

  • 0 回复 ge gavin
    TI__Guru**** 185470 points

    我明天会看下您的配置

  • 0 回复 Amy Luo
    TI__Guru**** 185470 points

    是的，MSB高位在前：

    输出代码可根据数据表 7.3.4 ADC Transfer Function章节说明转换为对应电压；

    关于寄存器，reg =后面是寄存器地址，data =后面是对应的寄存器值，是吗？您先看下您是否可以将采集代码转换为输入电压，以判断是否可以正常AD转换？有问题我再细看您的寄存器配置。

  • 0 回复 Amy Luo
    Prodigy 30 points

    关于寄存器，reg =后面是寄存器地址，data =后面是对应的寄存器值，是吗？

        ----是的

    您先看下您是否可以将采集代码转换为输入电压，以判断是否可以正常AD转换？

        ----按7.3.4 ADC Transfer Function，0x8bd1(35793) 转化后是8.738（35793/4096 )，这个代表0.873V？这个值跟万用表亮出来的值有点偏差。

  • 0 回复 ge gavin
    TI__Guru**** 185470 points

    您的应用是单端输入还是伪差分输入？AVDD电压是多少？