VII Slave24C08ReadBytes - Revision history

Szmz at 02:18, 30 August 2021

2021-08-30T02:18:05Z

Szmz at 02:17, 30 August 2021

2021-08-30T02:17:14Z

Szmz at 02:13, 30 August 2021

2021-08-30T02:13:23Z

Szmz: Created page with "In the slave mode, the data is sent to the internal data buffer of the adapter. ==== Prototype ==== int32_t WINAPI VII_Slave24C08ReadBytes(int32_t DevType,int32_t DevIndex,in..."

2021-08-30T02:10:29Z

Created page with "In the slave mode, the data is sent to the internal data buffer of the adapter. ==== Prototype ==== int32_t WINAPI VII_Slave24C08ReadBytes(int32_t DevType,int32_t DevIndex,in..."

New page

In the slave mode, the data is sent to the internal data buffer of the adapter.

==== Prototype ====
int32_t WINAPI VII_Slave24C08ReadBytes(int32_t DevType,int32_t DevIndex,int32_t I2CIndex,uint16_t DeviceAddr,uint32_t SubAddr,uint8_t* pReadData,uint16_t *pLen);

==== Parameter ====
'''DevType''':Please refer to the equipment type definition table for specific values.<br>
'''DevIndex''':Device index number, if there is only one device connected to the computer, the index number is 0, if there are multiple devices connected to the computer
Set the corresponding index number according to the actual need to open the device.<br>
'''I2CIndex''':The I2C channel that needs to read data, the value is 0 or 1.<br>
'''pWriteData''':The first address of the data buffer.<br>
'''Len''':The maximum number of data bytes to be sent is 10200.

==== Return code ====
Program execution status. 0 means the corresponding function is executed successfully. For the meaning of other return values, please refer to the error code definition table.

==== Example ====
#include <stdio.h>
#include "ControlI2C.h"

#define DATA_SIZE 1024

int32_t dev_index = 0;
int32_t ch_index = 0;
int ret,i;
//Scan device
ret = VII_ScanDevice(1);
if(ret <= 0)
{
printf("No device connect!\n");
return ret;
}

// Open device
ret = VII_OpenDevice(VII_USBI2C, dev_index , 0);
if (ret != ERR_SUCCESS)
{
printf("Open device error!\n");
return ret;
}

//Initializes the device
I2C_Config.AddrType = VII_ADDR_7BIT;
I2C_Config.ClockSpeed = 100000;
I2C_Config.ControlMode = VII_HCTL_SLAVE_MODE;
I2C_Config.MasterMode = VII_SLAVE;
I2C_Config.SubAddrWidth = VII_SUB_ADDR_2BYTE;
I2C_Config.Addr = 0xA0; //Must be set,very important
ret = VII_InitI2C(VII_USBI2C, dev_index, ch_index, &I2C_Config);
if (ret != ERR_SUCCESS)
{
printf("Initialize device error!\n");
return ret;
}

uint16_t SlaveWriteLen = 8;
uint8_t write_buffer[DATA_SIZE]={0};
for (i = 0; i < wr_len; i++){
write_buffer[i] = i;
}
uint16_t subAddr=0xf0;
uint16_t SlaveReadLen;
uint16_t SlaveWriteLen = DATA_SIZE- subAddr;
ret = VII_Slave24C08ReadBytes(VII_USBI2C, DEVICE_INDEX, I2C_INDEX, 0xA0, subAddr, read_buffer, &(SlaveReadLen));
if (ret != ERR_SUCCESS)
{
printf("Write data error!\n");
return ret;
}

@@ Line 13: / Line 13: @@
 '''SubAddr''': The sub address to read.<br>
 '''pReadData''':The first address of the data buffer.<br>
-'''pLen''':The number of valid data bytes read, max size is 1024.
+'''pLen''':The maximum number of data bytes to be read is 1024.
 ==== Return code ====

@@ Line 10: / Line 10: @@
 Set the corresponding index number according to the actual need to open the device.<br>
 '''I2CIndex''':The I2C channel that needs to read data, the value is 0 or 1.<br>
 '''SubAddr''': The sub address to read.<br>
 '''pReadData''':The first address of the data buffer.<br>
-'''pLen''':The number of valid data bytes read.
+'''pLen''':The number of valid data bytes read, max size is 1024.
 ==== Return code ====
@@ Line 26: / Line 27: @@
   int32_t ch_index = 0;
   int ret,i;
   //Initializes the device

@@ Line 1: / Line 1: @@
-In the slave mode, the data is sent to the internal data buffer of the adapter.
+Read data in slave mode. If the adapter receives data, it will return the received data after calling this function.
 ==== Prototype ====
 int32_t WINAPI VII_Slave24C08ReadBytes(int32_t DevType,int32_t DevIndex,int32_t I2CIndex,uint16_t DeviceAddr,uint32_t SubAddr,uint8_t* pReadData,uint16_t *pLen);
 ==== Parameter ====
-'''DevType''':Please refer to the equipment type definition table for specific values.<br>
+'''DevType''':Device type code, please refer to the device type definition table for specific values.<br>
 '''DevIndex''':Device index number, if there is only one device connected to the computer, the index number is 0, if there are multiple devices connected to the computer
 Set the corresponding index number according to the actual need to open the device.<br>
 '''I2CIndex''':The I2C channel that needs to read data, the value is 0 or 1.<br>
-'''pWriteData''':The first address of the data buffer.<br>
+'''SubAddr''': The sub address to read.<br>
-'''Len''':The maximum number of data bytes to be sent is 10200.
+'''pReadData''':The first address of the data buffer.<br>
 ==== Return code ====