CC2640R2F 硬件I2C问题

Hi，目前使用TI开发板的蓝牙芯片调试硬件I2C没有信号输出，一直没找到原因。

– 使用LAUNCHXL-CC2640R2开发板通过I2C和一个从设备通信；

– 使用STM32通过I2C和从设备读写正常，说明从设备本身没有问题；

– 使用i2ctmp007中的例程和从设备进行I2C通信正常；

问题出在将i2ctmp007中的代码迁移至SDK中的simple_peripheral例程后，始终看不到

I2C信号输出，可能是simple_peripheral例程中少添加或修改了部分代码，但我不知道少了什么。

我的步骤如下:

1. 向SDK中simple_peripheral例程drivers目录下添加i2c.c和i2c.h文件，并在main.c中添加

#include <ti/drivers/I2C.h>
#include "Board.h"

2. Board.h中定义

#define Board_I2C0              CC2640R2_LAUNCHXL_I2C0
#define Board_I2C_TMP           Board_I2C0

3. CC2640R2_LAUNCHXL.h中定义管脚

#define CC2640R2_LAUNCHXL_I2C0_SCL0IOID_5
#define CC2640R2_LAUNCHXL_I2C0_SDA0IOID_15

typedef enum CC2640R2_LAUNCHXL_I2CName {CC2640R2_LAUNCHXL_I2C0 = 0,CC2640R2_LAUNCHXL_I2CCOUNT
} CC2640R2_LAUNCHXL_I2CName;

4. CC2640R2_LAUNCHXL.C中添加有关I2C的部分

/*
 *  =============================== I2C ===============================
*/
#include <ti/drivers/I2C.h>
#include <ti/drivers/i2c/I2CCC26XX.h>

I2CCC26XX_Object i2cCC26xxObjects[CC2640R2_LAUNCHXL_I2CCOUNT];

const I2CCC26XX_HWAttrsV1 i2cCC26xxHWAttrs[CC2640R2_LAUNCHXL_I2CCOUNT] = {{.baseAddr= I2C0_BASE,.powerMngrId = PowerCC26XX_PERIPH_I2C0,.intNum= INT_I2C_IRQ,.intPriority = ~0,.swiPriority = 0,.sdaPin= CC2640R2_LAUNCHXL_I2C0_SDA0,.sclPin= CC2640R2_LAUNCHXL_I2C0_SCL0,}
};

const I2C_Config I2C_config[CC2640R2_LAUNCHXL_I2CCOUNT] = {{.fxnTablePtr = &I2CCC26XX_fxnTable,.object= &i2cCC26xxObjects[CC2640R2_LAUNCHXL_I2C0],.hwAttrs= &i2cCC26xxHWAttrs[CC2640R2_LAUNCHXL_I2C0]},
};

const uint_least8_t I2C_count = CC2640R2_LAUNCHXL_I2CCOUNT;

5. main.c中添加定义

#define TASKSTACKSIZE640

#define TEST_ADDR0x1A
#define MODULE_TEST_TEMP10x0001  /* Die Temp Result Register */
#define MODULE_TEST_TEMP20x0003  /* Object Temp Result Register */

#ifndef Board_TEST_ADDR
#define Board_TEST_ADDRTEST_ADDR
#endif

main.c中主函数中

/* Register Application callback to trap asserts raised in the Stack */RegisterAssertCback(AssertHandler);PIN_init(BoardGpioInitTable);uint8_ttxBuffer[1]={0x66};uint8_trxBuffer[10];I2C_Handlei2c;I2C_Paramsi2cParams;I2C_Transaction i2cTransaction;I2C_init();/* Create I2C for usage */I2C_Params_init(&i2cParams);i2cParams.bitRate = I2C_400kHz;i2c = I2C_open(Board_I2C_TMP, &i2cParams);/* Point to the T ambient register and read its 2 bytes *///txBuffer[0] = TMP007_OBJ_TEMP;i2cTransaction.slaveAddress = (Board_TEST_ADDR>>1);i2cTransaction.writeBuf = txBuffer;i2cTransaction.writeCount = 1;i2cTransaction.readBuf = NULL;i2cTransaction.readCount = 0;while(1){I2C_transfer(i2c, &i2cTransaction);}

请问哪里有不对的地方吗？

da qin zheng sheng：

有没有打开低功耗啊？

linch kong：

回复 da qin zheng sheng:

没有

YiKai Chen：

有沒有先檢查一下I2C_open回傳的handle i2c是不是null

linch kong：

回复 YiKai Chen:

查看了下，I2C_open返回值为NULL，没有打开，正常情况下返回值不是NULL，不知道什么东西没有考虑到？

Viki Shi：

参考下这边的帖子，下面有在simple_peripheral中融合i2ctmp007例程的单步指导：
e2e.ti.com/…/2543887