你好，
請問 I3C interrupt master example中這段 code 是Read , 我錄起來的波型是Write是正確的嗎?
請問這段code 的工作內容是master 從 slave read data 嗎?
為甚麼waveform 看起來像 master一直在傳送data 給slave?
謝謝
masterXfer.slaveAddress = 0x30U;
masterXfer.data = g_master_rxBuff;
masterXfer.dataSize = I3C_DATA_LENGTH - 1U;
masterXfer.direction = kI3C_Read;
masterXfer.busType = kI3C_TypeI3CSdr;
masterXfer.flags = kI3C_TransferDefaultFlag;
masterXfer.ibiResponse = kI3C_IbiRespAckMandatory;
result = I3C_MasterTransferNonBlocking(EXAMPLE_MASTER, &g_i3c_m_handle, &masterXfer);
if (kStatus_Success != result)
{
return result;
}
timeout = 0U;
/* Wait for transfer completed. */
while ((!g_ibiWonFlag) && (!g_masterCompletionFlag) && (g_completionStatus == kStatus_Success) &&
(++timeout < I3C_TIME_OUT_INDEX))
{
__NOP();
}
result = g_completionStatus;
if ((result != kStatus_Success) || (timeout == I3C_TIME_OUT_INDEX))
{
return -1;
}
g_masterCompletionFlag = false;
Hi @AlicePXLin ,
Maybe you didn't see the correct area in the wave, this is my previous wave:
write:
read:
Wish it helps you!
Best Regards,
Kerry
Hi @AlicePXLin ,
IBI 的数据应该是符合下面流程图：
我记得MIMXRT685-AUDIO-EVK， 这个会接一个外部sensor，然后是IBI的，之前我测过，但是忘记波形放哪里了。和这个单纯传数据不一样。
关于interrupt和polling，应该波形一样，你可以测试看看。上面我给的波形是polling的。暂时手上没有工具，在家办公，没法测，你可以测试看看。多跑几遍，看上去你的逻辑分析仪好像不太能抓全波形。
IBI的应该可以看到mandatory byte。
比如如下代码：
主机：
i3c_register_ibi_addr_t ibiRecord = {.address = {0x30U}, .ibiHasPayload = true};
I3C_MasterRegisterIBI(EXAMPLE_MASTER, &ibiRecord);
I3C_MasterTransferCreateHandle(EXAMPLE_MASTER, &g_i3c_m_handle, &masterCallback, NULL);
result = kStatus_Success;
while (1)
{
if (g_ibiWonFlag)
{
PRINTF("\r\nReceived slave IBI request.");
for (uint8_t count = 0; count < g_ibiUserBuffUsed; count++)
{
PRINTF(" Data %x.", g_ibiUserBuff[count]);
}
g_ibiWonFlag = false;
g_pollIbiEvent = false;
}
if (g_pollIbiEvent)
{
do
{
i3c_poll_slaveIBI(EXAMPLE_MASTER, &g_i3c_m_handle);
} while(result != kStatus_Success);
}
}
从机：
PRINTF("\r\n I3C master I3C SDR transfer finished .\r\n");
uint8_t ibiData = 0x55U;
I3C_SlaveRequestIBIWithData(EXAMPLE_SLAVE, &g_i3c_s_handle, &ibiData, 1);
PRINTF("\r\n I3C slave request IBI event with one mandatory byte %x.\r\n", ibiData);
Best Regards,
Kerry
