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下面那个 qsfp28 的 i2c 管脚好像反了 #3

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xiongyw opened this issue Sep 17, 2023 · 5 comments
Open

下面那个 qsfp28 的 i2c 管脚好像反了 #3

xiongyw opened this issue Sep 17, 2023 · 5 comments

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@xiongyw
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xiongyw commented Sep 17, 2023

下面那个 qsfp 接口中, 好像 SDA 应该是 BD9, SCL 应该是 BF12. vu13p_qsfp.xdc 中好像搞反了。

@maswx
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maswx commented Sep 17, 2023

确认吗?我一直用的内部iic,外部都没测过

@xiongyw
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xiongyw commented Oct 31, 2023

我基于 pin-uart 测试的结果,供参考:

    | signal     |  pkg pin  |  direction | default level (V) |
    |:-----------|:----------|-----------:|------------------:|
    |SCL         | BF12      | inout      | 3.3 (pull-up)     |
    |SDA         | BD9       | inout      | 3.3 (pull-up)     |
    |ResetL      | BB10      | output     |            0      |
    |LPMode      | BB7       | output     |            0      |
    |IntL        | BC11      | input      | 3.3 (pull-up)     |
    |ModPrsL     | BB11      | input      | 3.3 (pull-up)     |

对 Alex Forencich 的pin-uart稍作改造,然后用 TTL 串口线检测 FPGA 输出。油管上Alex示范使用pin-uart逆向管脚的视频中使用的是带串口逻辑分析功能的示波器. 对alivu13p而言,由于 100Mhz 输入频率是确定的,直接使用串口 115200n8 模式就可以。

@maswx
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maswx commented Oct 31, 2023

我基于 pin-uart 测试的结果,供参考:

    | signal     |  pkg pin  |  direction | default level (V) |
    |:-----------|:----------|-----------:|------------------:|
    |SCL         | BF12      | inout      | 3.3 (pull-up)     |
    |SDA         | BD9       | inout      | 3.3 (pull-up)     |
    |ResetL      | BB10      | output     |            0      |
    |LPMode      | BB7       | output     |            0      |
    |IntL        | BC11      | input      | 3.3 (pull-up)     |
    |ModPrsL     | BB11      | input      | 3.3 (pull-up)     |

对 Alex Forencich 的pin-uart稍作改造,然后用 TTL 串口线检测 FPGA 输出。油管上Alex示范使用pin-uart逆向管脚的视频中使用的是带串口逻辑分析功能的示波器. 对alivu13p而言,由于 100Mhz 输入频率是确定的,直接使用串口 115200n8 模式就可以。

太牛了!Alex 是真大佬啊!!!

@maswx
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maswx commented Oct 31, 2023

我基于 pin-uart 测试的结果,供参考:

    | signal     |  pkg pin  |  direction | default level (V) |
    |:-----------|:----------|-----------:|------------------:|
    |SCL         | BF12      | inout      | 3.3 (pull-up)     |
    |SDA         | BD9       | inout      | 3.3 (pull-up)     |
    |ResetL      | BB10      | output     |            0      |
    |LPMode      | BB7       | output     |            0      |
    |IntL        | BC11      | input      | 3.3 (pull-up)     |
    |ModPrsL     | BB11      | input      | 3.3 (pull-up)     |

对 Alex Forencich 的pin-uart稍作改造,然后用 TTL 串口线检测 FPGA 输出。油管上Alex示范使用pin-uart逆向管脚的视频中使用的是带串口逻辑分析功能的示波器. 对alivu13p而言,由于 100Mhz 输入频率是确定的,直接使用串口 115200n8 模式就可以。

另外一个通道也测了吗?我准备更新一下XDC

@xiongyw
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xiongyw commented Nov 3, 2023

另一个通道(就是靠上的那个)是对的。

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