I3C tSU-STA time
@kerryzhou
你好，下面是我的code
請問該如何看FCLK 是多少呢?
CLOCK_AttachClk(kMAIN_CLK_to_I3C_CLK);
CLOCK_SetClkDiv(kCLOCK_DivI3cClk, 4);
BOARD_InitBootPins();
BOARD_InitBootClocks();
BOARD_InitDebugConsole();
I3C_MasterGetDefaultConfig(&masterConfig);
masterConfig.baudRate_Hz.i2cBaud = EXAMPLE_I2C_BAUDRATE;
masterConfig.baudRate_Hz.i3cPushPullBaud = 4000000U;
masterConfig.baudRate_Hz.i3cOpenDrainBaud = 1500000U;
masterConfig.enableOpenDrainStop = false;
I3C_MasterInit(EXAMPLE_MASTER, &masterConfig, I3C_MASTER_CLOCK_FREQUENCY);
I3C->MCONFIG =
(I3C->MCONFIG & ~(I3C_MCONFIG_SKEW_MASK | I3C_MCONFIG_PPBAUD_MASK | I3C_MCONFIG_PPLOW_MASK | I3C_MCONFIG_ODBAUD_MASK | I3C_MCONFIG_I2CBAUD_MASK | I3C_MCONFIG_ODSTOP_MASK)) |
I3C_MCONFIG_SKEW(0) | // SKEW = 0
I3C_MCONFIG_PPBAUD(6) | // THPP = 40ns * (7) = 280ns
I3C_MCONFIG_PPLOW(1) | // TLPP = 280ns+1*40ns
I3C_MCONFIG_ODBAUD(0) | // ODBAUD = THPP*(0)= 280ns
I3C_MCONFIG_ODHPP(1) | // ODHPP=1 use PPBAUD 280ns for high
I3C_MCONFIG_ODSTOP(0) |
I3C_MCONFIG_I2CBAUD(8); // 5*ODBAUD = 5*280ns for high, 5*ODBAUD = 5*280ns for low
謝謝!
