RT1052(3) LPI2C的使用

// 开始：

// 准备1：先在drivers 里添加lpiic的 driver

// 准备2：添加头文件 #include "fsl_lpi2c.h"

// 1.配置iic gpio 在InitPins 里面实现

// 2.配置iic 时钟

// 3.配置default master的配置

// 4.配置iic master配置

IOMUXC_SetPinMux(

IOMUXC_GPIO_AD_B1_00_LPI2C1_SCL, /* GPIO_AD_B1_00 is configured as LPI2C1_SCL */

1U);

/* Software Input On Field: Input Path is determined by functionality */

IOMUXC_SetPinMux(

IOMUXC_GPIO_AD_B1_01_LPI2C1_SDA, /* GPIO_AD_B1_01 is configured as LPI2C1_SDA */

1U); /* Software Input On Field: Input Path is determined by functionality */

IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_00_LPI2C1_SCL, 0x18B0U);

IOMUXC_SetPinConfig(IOMUXC_GPIO_AD_B1_01_LPI2C1_SDA, 0x18B0U);

/*Clock setting for LPI2C*/

CLOCK_SetMux(kCLOCK_Lpi2cMux, 0u);

CLOCK_SetDiv(kCLOCK_Lpi2cDiv, 5u);

lpi2c_master_config_t lpi2cConfig = {0};

/*

* lpi2cConfig.debugEnable = false;

* lpi2cConfig.ignoreAck = false;

* lpi2cConfig.pinConfig = kLPI2C_2PinOpenDrain;

* lpi2cConfig.baudRate_Hz = 100000U;

* lpi2cConfig.busIdleTimeout_ns = 0;

* lpi2cConfig.pinLowTimeout_ns = 0;

* lpi2cConfig.sdaGlitchFilterWidth_ns = 0;

* lpi2cConfig.sclGlitchFilterWidth_ns = 0;

*/

LPI2C_MasterGetDefaultConfig(&lpi2cConfig);

LPI2C_MasterInit(EEPROM_I2C_MASTER , &lpi2cConfig, LPI2C1_CLOCK_FREQ);

bool iic_send(void)

{

lpi2c_master_transfer_t trans;

status_t reVal = kStatus_Fail;

uint8_t datas[]={0x55,0xaa};

trans.data=datas;

trans.dataSize=2;

trans.direction=kLPI2C_Write;

trans.slaveAddress=(0xa0>>1);

trans.subaddress=0x01;

trans.subaddressSize=0x01;

trans.flags=kLPI2C_TransferDefaultFlag;

reVal = LPI2C_MasterTransferBlocking(LPI2C1,&trans);

if (reVal != kStatus_Success) {

return 1;

}

return 0;

}