DA14531 MOD和（I2C设备）MCP3422之间发生了如何验证是否存在适当的I2C连接

Thank you for your response,

根据您的答案，我已经检查了abrt_code状态，我也已经修改了一些其他错误和状态检查。

// *USER_Variables&Prototype_START *//
静态void set_dev_addr（uint8_t）;
int i2cm_write(uint8_t, uint8_t const * const, uint8_t, bool);
int i2cm_read(uint8_t, uint8_t * const, uint8_t, bool);
静态int read（uint8_t，uint8_t * const，uint8_t）;

static const i2c_cfg_t i2c_cfg = {
.clock_cfg.ss_hcnt = i2c_ss_scl_hcnt_reg_reset，
.clock_cfg.ss_lcnt = i2c_ss_scl_lcnt_reg_reset，
。clock_cfg.fs_hcnt = I2C_FS_SCL_HCNT_REG_RESET,
。clock_cfg.fs_lcnt = I2C_FS_SCL_LCNT_REG_RESET,
。restart_en = I2C_RESTART_ENABLE, // Restart condition enabled
。speed = I2C_SPEED_STANDARD,
。mode = I2C_MODE_MASTER, // Master Mode
.ddr_mode = i2c_addressing_7b，// 7位寻址
/ *当读/写进行时指定的设备地址允许在同一I2C总线上存在多个设备* /
.Address = 0x68，//目标/从地址（1101000 for mcp3422）
.tx_fifo_level = 1，
。rx_fifo_level = 1,
};

const uint8_t read_config = 0x10;// 00010000.
UINT8_T *数据;//Buffer where data are stored
uint16_t len = 1;//数据缓冲区的长度

// *USER_Variables&Prototype_END *//

void i2c_test（void）;

/**
****************************************************************************************

int main（空白）
{
system_init();
i2c_test（）;

//while(1);
}

void i2c_test（void）
{
printf_string（UART，“\ n \ r \ n \ r ************”）;
printf_string(UART, "\n\r* I2C TEST *\n\r");
printf_string（UART，“************* \ n \ r”）;
// bool isnewtempvalue = 1;
//float temp = read_MCP3422(&isNewTempValue);

i2c_init（＆i2c_cfg）;
int ret =读取（read_config，data，len）;
if(0 != ret){
printf_string(UART, "\n\n\r*return after readFun = "); // Debug output
printf_byte（UART，RET）;
}
}

static int read(uint8_t addr, uint8_t * const data, uint8_t len)
{
int ret;

/ *设置寄存器地址以读取* /
if ((ret =i2cm_write（mcp3422_i2c_slave_addr，＆addr，sizeof（addr），false））== 0）{
/ *读取地址* /
RET =i2cm_read(MCP3422_I2C_SLAVE_ADDR, data, len, true);
}
return ret;
}

int i2cm_write(uint8_t dev_addr, uint8_t const * const buffer, uint8_t len, bool add_stop)
{
int ret = 0;
uint16_t bytesSent;
i2c_abort_t abrt_code;

uint32_t flags = I2C_F_NONE;
if (add_stop) {
flags = I2C_F_WAIT_FOR_STOP | I2C_F_ADD_STOP;
}
/ *总线上的每个I2C设备都有一个唯一的地址，在我们沟通之前设置为* /
set_dev_addr(dev_addr);
/* Perform blocking write */
bytesSent =i2c_master_transmit_buffer_sync（buffer，len，＆abrt_code，flags）;

if（（i2c_abort_none！= abrt_code）||（Bytessent！= Len））{
RET = -1;
}
printf_string(UART, "\n\rreturn after mTrans = "); // Debug output
printf_byte（UART，RET）;
printf_string(UART, "\n\rData bytes sent = "); // Debug output
printf_byte（UART，BYTESSENT）;
printf_string（UART，“\ n \ rdata sent =”）;//调试输出
printf_byte（UART，Buffer [0]）;
return ret;
}

int i2cm_read(uint8_t dev_addr, uint8_t * const data, uint8_t len, bool add_stop)
{
int ret = 0;
uint16_t bytesReceived;
i2c_abort_t abrt_code;

uint32_t flags = I2C_F_NONE;
if (add_stop) {
标志= i2c_f_add_stop;
}
/ *总线上的每个I2C设备都有一个唯一的地址，在我们沟通之前设置为* /
set_dev_addr(dev_addr);
/* Performing blocking read */
bytesreceived =i2c_master_receive_buffer_sync（data，len和abrt_code，flags）;

if（（abrt_code！= i2c_abort_none）||（bytesreceived！= len））{
RET = -1;
}
PRINTF_STRING（UART，“MRECE =”\ n \ n \ rreturn之后）;//调试输出
printf_byte（UART，RET）;
printf_string(UART, "\n\rData bytes received = "); // Debug output
printf_byte（UART，BYTESRECERED）;
printf_string（UART，“\ n \ rdata收到=”）;//调试输出
printf_byte(UART, *data);
return ret;
}

静态void set_dev_addr（uint8_t addr）
{
/ *只有当控制器被禁用时才可以设置设备地址* /
i2c_set_controller_status（i2c_controller_disable）;
/ *启用或禁用控制器时有两个IC_CLK延迟* /
while(i2c_get_controller_status() != I2C_CONTROLLER_DISABLE);

i2c_set_target_address(i2c_cfg.address);

i2c_set_controller_status（i2c_controller_enable）;
/ *启用或禁用控制器时有两个IC_CLK延迟* /
while ((i2c_get_controller_status() != I2C_CONTROLLER_ENABLE));
}

我如下所示的输出：

************
* I2C测试*
************

MTRANS = 00后返回
数据字节发送= 01
Data sent = 10
MRECE = FF后返回
收到的数据字节= 00
Data received = 48

*return after readFun = FF

/ *****************************************

在i2c_master_receive_buffer_sync（data，len和abrt_code，flags）;function call, Did I need to pass as a value ofabrt_code.argument..?

2. In my code, I am not passing anyabrt_code.争论和我得到了-1as ret value in below status check. I am not able to understand why?

if（（abrt_code！= i2c_abort_none）||（bytesreceived！= len））{
RET = -1;
}

3. Ini2c_master_receive_buffer_sync（）;function ini2c.cwe are directly checking in if conditionabrt_code.如果条件的价值。作为我的理解，它正在检查“i2c_abort_t abrt_code;”。which don't have any value. Can you please explain to me If I misunderstand anywhere?

if (abrt_code){
*abrt_code.= ret;
}

4.I2C_INIT（CFG）;函数应在后面调用system_init();function right..? But, in your EEPROM_Example you haven't called anyi2c_init(); function。

3. I think most of the customers are facing the issues with I2C interface. Can you provide any simple example code for I2C communication with the sensors, so that it will be helpful for developing I2C sensor interface with the DA14531_MOD.

ThankYou

D.ravikiran.