am335x 读取pcf85163时间

afsa af a

Intellectual 753 points

测试工程实例hsi2cTempSensor ，我现在想这个基础上修改下读出PCF85163的时间，我的操作是把configData修改成从机地址，I2C端口修改下。调试出现无应答的错误。是不是还需要修改一些其它的东西。

我用的平台是CCS5.2，用的是自己的平台，BSD是AM335X_StarterWare_02_00_00_07，谢谢大神的指教，刚接触，谢谢。

9 年多前

0 afsa af a 9 年多前

Intellectual 753 points

使用的是I2C2（D18 D17）读取PCF8563时间平台是CCS5.2，用的是自己的平台，BSD是AM335X_StarterWare_02_00_00_07

部分发代码如下：

main(){

IntMasterIRQEnable();

I2CAintcConfigure();

I2CPinMuxSetup(1);

I2CMasterDisable(SOC_I2C_2_REGS);

I2CAutoIdleDisable(SOC_I2C_2_REGS);

I2CMasterInitExpClk(SOC_I2C_2_REGS, 48000000, 12000000, 400000);

I2CMasterSlaveAddrSet(SOC_I2C_2_REGS, I2C_SLAVE_ADDR); //此处设置的从机地址是写（A3）

I2CMasterEnable(SOC_I2C_2_REGS);

configData = 0xA2

ConfigureTimeSensor(configData) //发送写

configData = 0x02

ConfigureTimeSensor(configData) //发送从机地址

configData = 0x02 | 0x01

ConfigureTimeSensor(configData) //发送读模式

configData = 0x02

TimeRegRead(time, configData); //读指令

}

static void ConfigureTempSensor(unsigned char configData){

dataToSlave[0] =configData;

tCount = 0;

SetupI2CTransmit(1);

}

在调试的过程中，每次发送数据就会停止在SetupI2CTransmit里面的while(flag)等待。一直执行不下去，是不是哪个地方设置有问题，还有就是对 SetupI2CTransmit函数理解错误了，求指导，谢谢了。

0 afsa af a 9 年多前回复 afsa af a

Intellectual 753 points

有时间可以给一个am335x 的I2C2的一个使用例程。我修改使用I2C2读取pcf8563时间（祼机跑），可是无法正常执行下去（修改时钟、管脚）。已经好几天了，还是没有解决问题。刚入手，谢谢。修改后的代码如下：

main(){

I2CAintcConfigure();

SetupI2C();

configData = 0xA2 ;
ConfigureTimeSensor(configData);

ptrReg = 0x02;

TemperatureRegRead(temperature, ptrReg);

}

static void SetupI2C(void)
{
// I2C1ModuleClkConfig(); // I2C2 clk module
I2C2ModuleClkConfig();
I2CPinMuxSetup(2);

/* Put i2c in reset/disabled state */
I2CMasterDisable(SOC_I2C_2_REGS);

/*
** Upon reset Auto Idel is enabled.
** Hence it is disabled after reset
*/
I2CAutoIdleDisable(SOC_I2C_2_REGS);

/* Configure i2c bus speed to 400khz */
I2CMasterInitExpClk(SOC_I2C_2_REGS, 48000000, 12000000, 400000);

/* Set i2c slave address */
I2CMasterSlaveAddrSet(SOC_I2C_2_REGS, I2C_SLAVE_ADDR); //0xA2

/* Bring I2C module out of reset */
I2CMasterEnable(SOC_I2C_2_REGS);
}

void I2CPinMuxSetup(unsigned int instance)
{

if(instance == 0)
{
HWREG(SOC_CONTROL_REGS + CONTROL_CONF_I2C0_SDA) =
(CONTROL_CONF_I2C0_SDA_CONF_I2C0_SDA_RXACTIVE |
CONTROL_CONF_I2C0_SDA_CONF_I2C0_SDA_SLEWCTRL |
CONTROL_CONF_I2C0_SDA_CONF_I2C0_SDA_PUTYPESEL );

HWREG(SOC_CONTROL_REGS + CONTROL_CONF_I2C0_SCL) =
(CONTROL_CONF_I2C0_SCL_CONF_I2C0_SCL_RXACTIVE |
CONTROL_CONF_I2C0_SCL_CONF_I2C0_SCL_SLEWCTRL |
CONTROL_CONF_I2C0_SCL_CONF_I2C0_SCL_PUTYPESEL );

}
else if(instance == 1)
{
/* I2C_SCLK */
HWREG(SOC_CONTROL_REGS + CONTROL_CONF_SPI0_D1) =
(CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_PUTYPESEL |
CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_RXACTIVE |
CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_SLEWCTRL |
CONTROL_CONF_MUXMODE(2));
/* I2C_SDA */
HWREG(SOC_CONTROL_REGS + CONTROL_CONF_SPI0_CS0) =
(CONTROL_CONF_SPI0_CS0_CONF_SPI0_CS0_PUTYPESEL |
CONTROL_CONF_SPI0_CS0_CONF_SPI0_CS0_RXACTIVE |
CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_SLEWCTRL |
CONTROL_CONF_MUXMODE(2));

}
else if(instance == 2)
{
/* I2C_SCLK */
HWREG(SOC_CONTROL_REGS + CONTROL_CONF_UART_RTSN(1)) =
(CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_PUTYPESEL |
CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_RXACTIVE |
CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_SLEWCTRL |
CONTROL_CONF_MUXMODE(2));
/* I2C_SDA */
HWREG(SOC_CONTROL_REGS + CONTROL_CONF_UART_CTSN(1)) =
(CONTROL_CONF_SPI0_CS0_CONF_SPI0_CS0_PUTYPESEL |
CONTROL_CONF_SPI0_CS0_CONF_SPI0_CS0_RXACTIVE |
CONTROL_CONF_SPI0_D1_CONF_SPI0_D1_SLEWCTRL |
CONTROL_CONF_MUXMODE(2));
}
}

/*
** I2C Interrupt Service Routine. This function will read and write
** data through I2C bus.
*/
void I2CIsr(void)
{
unsigned int status = 0;

/* Get only Enabled interrupt status */
status = I2CMasterIntStatus(SOC_I2C_2_REGS);

/*
** Clear all enabled interrupt status except receive ready and
** transmit ready interrupt status
*/
I2CMasterIntClearEx(SOC_I2C_2_REGS,
(status & ~(I2C_INT_RECV_READY | I2C_INT_TRANSMIT_READY)));

if(status & I2C_INT_RECV_READY)
{
/* Receive data from data receive register */
dataFromSlave[rCount++] = I2CMasterDataGet(SOC_I2C_2_REGS);

/* Clear receive ready interrupt status */
I2CMasterIntClearEx(SOC_I2C_2_REGS, I2C_INT_RECV_READY);

if(rCount == numOfBytes)
{
/* Disable the receive ready interrupt */
I2CMasterIntDisableEx(SOC_I2C_2_REGS, I2C_INT_RECV_READY);

/* Generate a STOP */
I2CMasterStop(SOC_I2C_2_REGS);

}

}
if (status & I2C_INT_TRANSMIT_READY)
{
/* Put data to data transmit register of i2c */
I2CMasterDataPut(SOC_I2C_2_REGS, dataToSlave[tCount++]);

/* Clear Transmit interrupt status */
I2CMasterIntClearEx(SOC_I2C_2_REGS, I2C_INT_TRANSMIT_READY);

if(tCount == numOfBytes)
{
/* Disable the transmit ready interrupt */
I2CMasterIntDisableEx(SOC_I2C_2_REGS, I2C_INT_TRANSMIT_READY);

}

if (status & I2C_INT_STOP_CONDITION)
{
/* Disable transmit data ready and receive data read interupt */
I2CMasterIntDisableEx(SOC_I2C_2_REGS, I2C_INT_TRANSMIT_READY |
I2C_INT_RECV_READY |
I2C_INT_STOP_CONDITION);
flag = 0;
}

if(status & I2C_INT_NO_ACK)
{
I2CMasterIntDisableEx(SOC_I2C_2_REGS, I2C_INT_TRANSMIT_READY |
I2C_INT_RECV_READY |
I2C_INT_NO_ACK |
I2C_INT_STOP_CONDITION);
/* Generate a STOP */
I2CMasterStop(SOC_I2C_2_REGS);

flag = 0;
}
}

0 afsa af a 9 年多前回复 afsa af a

Intellectual 753 points

static void ConfigureTimeSensor(unsigned char configData)
{
dataToSlave[0] = configData;

tCount = 0;
SetupI2CTransmit(1);
}

/* Reads temperature value */
static void TemperatureRegRead(unsigned char *data, unsigned char ptrReg)
{
unsigned int i;
rCount = 0;
tCount = 0;

/* Reg offset of temperature sensor */
dataToSlave[0] = ptrReg;
SetupI2CReception(7);

for(i = 7; i ; i--)
{
*data = dataFromSlave[7-i];
data++;
}
}

0 Butterfly 9 年多前回复 afsa af a

TI__Genius 14990 points

建议楼主下次发到Sitara论坛版块讨论 http://www.deyisupport.com/question_answer/dsp_arm/sitara_arm/f/25.aspx

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am335x 读取pcf85163时间