# Problem with MDC API

**URL:** <https://forum.legato.io/t/problem-with-mdc-api/5630>\
**Category:** Uncategorized\
**Created:** [February 25, 2021, 6:17am UTC](https://forum.legato.io/t/problem-with-mdc-api/5630 "2021-02-25T06:17:26Z")\
**Posts on this page:** 4\
**Page:** 3

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [March 6, 2021, 2:58am UTC](https://forum.legato.io/t/problem-with-mdc-api/5630/42 "2021-03-06T02:58:28Z")

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Then does it work on r12 or r13 of wp77?

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**Author:** ![ClaudioBaldo](https://avatars.discourse-cdn.com/v4/letter/c/b9bd4f/32.png) [@ClaudioBaldo](https://forum.legato.io/u/ClaudioBaldo)\
**Post date:** [March 6, 2021, 3:07am UTC](https://forum.legato.io/t/problem-with-mdc-api/5630/43 "2021-03-06T03:07:52Z")

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No, same problem, FX30S does not have the same firmware of the generic WP77 even if the hardware is the same, I have been recommended not to use that firmware.

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**Author:** ![jyijyi](https://sea1.discourse-cdn.com/flex019/user_avatar/forum.legato.io/jyijyi/32/822_2.png) [@jyijyi](https://forum.legato.io/u/jyijyi)\
**Post date:** [March 6, 2021, 4:09am UTC](https://forum.legato.io/t/problem-with-mdc-api/5630/44 "2021-03-06T04:09:55Z")

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I don’t see problem with WP77 FW R12 on mangoh red board, you can see my logread.

[logread\_WP77\_FW\_R12.txt](https://forum.legato.io/uploads/short-url/6mJJk2nNDJorVJls9TehaWpG3R9.txt) (19.7 KB)  
root@fx30:~# cm info  
Device: WP7702  
IMEI: 352653090002874  
IMEISV: 4  
FSN: VU735370521401  
Firmware Version: SWI9X06Y\_02.32.02.00 c2e98c jenki[290.435144] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
ns 2019/08/30 07:28:21  
Bootloader Version: SWI9X06Y\_[290.451564] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
02.32.02.00 c2e98c jenkins 2019/08/30 07:28:21  
[290.469236] i2c-msm-v2 78b8000.i2c: BUS ERROR:noisy bus/unexpected start/stop tag: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081121c4 OPER:0x00000000  
[290.490722] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.502318] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.515603] i2c-msm-v2 78b8000.i2c: BUS ERROR:noisy bus/unexpected start/stop tag: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081121c4 OPER:0x00000000  
[290.532430] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.571150] i2c-msm-v2 78b8000.i2c: error timeout on polling for valid state. check core\_clk  
[290.580691] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.592369] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.605130] i2c-msm-v2 78b8000.i2c: BUS ERROR:noisy bus/unexpected start/stop tag: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081121c4 OPER:0x00000000  
[290.622432] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.634233] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.646931] i2c-msm-v2 78b8000.i2c: BUS ERROR:noisy bus/unexpected start/stop tag: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081121c4 OPER:0x00000000  
[290.664204] i2c-msm-v2 78b8000.i2c: ARB\_LOST: msgs(n:1 cur:0 tx) bc(rx:0 tx:2) mode:FIFO slv\_addr:0x3a MSTR\_STS:0x081321d0 OPER:0x00000090  
[290.702850] i2c-msm-v2 78b8000.i2c: error timeout on polling for valid state. check core\_clk  
[290.710384] mci\_protocol\_frame\_send: write frame fail to I2C: -5 of 2  
[290.716685] swimcu\_ping: Failed to send PING  
MCU Version: 000.000  
PRI Part Number (PN): 9907365  
PRI Revision: 001.001  
Carrier PRI Name: GENERIC  
Carrier PRI Revision: 001.055\_000  
SKU: 1103530  
Last Reset Cause: Power Down  
Resets Count: Expected: 858 Unexpected: 257  
root@fx30:~#

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<div class="post-metadata">

**Author:** ![ClaudioBaldo](https://avatars.discourse-cdn.com/v4/letter/c/b9bd4f/32.png) [@ClaudioBaldo](https://forum.legato.io/u/ClaudioBaldo)\
**Post date:** [March 15, 2021, 6:40am UTC](https://forum.legato.io/t/problem-with-mdc-api/5630/45 "2021-03-15T06:40:40Z")

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I have got this fixed.

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