RT1176EVK SPI压力测试无法通过

[emmmmmmmmmmmmmm]

Hi,all

我在使用两块RT1176 EVK做SPI收发测试时，长时间测试，中间会出现数据传输错误或者数据出现偏移，能帮忙看下吗？

硬件连线如下

 主                              从  
CLK <=========> CLK

CS <=========> CS

MISO <=========> MOSI

MOSI <=========> MISO

两块板子根据readme卸掉了R200,R404,R406,R408.

测试现场如下

 

[emmmmmmmmmmmmmm]

出错时间不一定导致波形难以抓取，长的话两天会出现一次error，短则几小时出现一次error

[Hui_Ma]

Hi,

I am thinking there with potential risk during SPI robust test: when SPI master start the transaction, while SPI slave are not ready (SPI slave eDMA was not ready to receive data). You can calculate the SPI communication count . During SPI master code, you could print count value with 10 minutes interval. Then you could check when there with communication issue happens.

Mike

[Hui_Ma]

Hi,

I checked attached codes, the SPI slave has a loopCounter variable.

What's the loopCounter value when the communication issue happens.

If add the delay time at SPI master could make the situation be better?

delay_ms(2);

And I also find below different setting with SPI pads, could you using below setting at <pin_mux.c> file.

IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_28_LPSPI1_SCK, 0x02U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_29_LPSPI1_PCS0, 0x02U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_30_LPSPI1_SOUT, 0x02U);
IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_31_LPSPI1_SIN, 0x02U);

Wish it helps.

Mike

[emmmmmmmmmmmmmm]

感谢回复
我会按照你的建议重新测试

[emmmmmmmmmmmmmm]

PinConfig设置0x02，延迟设置20ms，多次测试，仍然会出现问题。关于errorCount的值会不同，出问题时errorCount有时是1024有时是1或者其他值，并不固定

[Hui_Ma]

Hi

Could you try to make below change:

while (1)
{

LPSPI_MasterTransferEDMA(EXAMPLE_LPSPI_MASTER_BASEADDR, &g_m_edma_handle, &masterXfer);

/* Wait until transfer completed */
while (!isTransferCompleted)
{
}
isTransferCompleted = false;

Change to 

while (1)
{

isTransferCompleted = false;

LPSPI_MasterTransferEDMA(EXAMPLE_LPSPI_MASTER_BASEADDR, &g_m_edma_handle, &masterXfer);

/* Wait until transfer completed */
while (!isTransferCompleted)
{
}

Wish it helps.

Mike

[emmmmmmmmmmmmmm]

按照您的建议，还是会出现数据错误现象。

[Hui_Ma]

Hi

能否提供SPI主从机通信时，USB逻辑分析仪抓取的信号波形。尤其是出错时候SPI总线信号情况。

Mike