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器件型号：LAUNCHXL-F280025C 主题中讨论的其他器件：C2000WARE
尊敬的社区：
我目前使用由 C2000Ware SDK 的"i2c_ex2_eeproM"和"i2c_ex4_eeprom_Polling"启发的 I2C 轮询方法来编写1字节写入和读取 EEPROM 示例
我尝试运行两个代码的示例,我无法写入或读取 AT24XX 分离板。
因此、我 在 i2c_ex4_eeprom_polling 示例中尝试了对现有库 i2cLib_FIFO_POLLING 在没有 bus_scan ()的情况下使用以下代码。
您能为我介绍如何配置从 EEPROM 读取和写入
根据我从 SDK 获取的信息、按顺序调用了以下函数、如有必要、请检查更新
到 i2c 主器件函数调用流程：
I2C_setDataCount ()；
I2C_setConfig ()；
I2C_setAddressMode ()；
I2C_setTargetAddress ()；
I2C_putData ()；
I2C_sendStartCondition ()；
//等待 Rx 数据
I2C_sendStopCondition ()；
我在此附上了尽可能简单的代码、此后我还无法从 EEPROM 写入或读取数据
#include "driverlib.h"
#include "device.h"
#include "i2cLib_FIFO_polling.h"
//
// Defines
//
#define EEPROM_ADDR 0x50
//
// Globals
//
struct I2CHandle EEPROM;
uint16_t TX_MsgBuffer[MAX_BUFFER_SIZE];
uint16_t RX_MsgBuffer[MAX_BUFFER_SIZE];
uint32_t ControlAddr;
uint16_t status;
void I2C_GPIO_init(void)
{
// I2CA pins (SDAA / SCLA)
GPIO_setDirectionMode(DEVICE_GPIO_PIN_SDAA, GPIO_DIR_MODE_IN);
GPIO_setPadConfig(DEVICE_GPIO_PIN_SDAA, GPIO_PIN_TYPE_PULLUP);
GPIO_setQualificationMode(DEVICE_GPIO_PIN_SDAA, GPIO_QUAL_ASYNC);
GPIO_setDirectionMode(DEVICE_GPIO_PIN_SCLA, GPIO_DIR_MODE_IN);
GPIO_setPadConfig(DEVICE_GPIO_PIN_SCLA, GPIO_PIN_TYPE_PULLUP);
GPIO_setQualificationMode(DEVICE_GPIO_PIN_SCLA, GPIO_QUAL_ASYNC);
GPIO_setPinConfig(DEVICE_GPIO_CFG_SDAA);
GPIO_setPinConfig(DEVICE_GPIO_CFG_SCLA);
}
void I2Cinit(void)
{
//myI2CA initialization
I2C_disableModule(I2CA_BASE);
I2C_initController(I2CA_BASE, DEVICE_SYSCLK_FREQ, 100000, I2C_DUTYCYCLE_50);
I2C_setConfig(I2CA_BASE, I2C_CONTROLLER_SEND_MODE);
I2C_setTargetAddress(I2CA_BASE, 0x50);
// I2C_setOwnAddress(I2CA_BASE, 96); //I2CA address
I2C_disableLoopback(I2CA_BASE);
I2C_setBitCount(I2CA_BASE, I2C_BITCOUNT_8);
I2C_setDataCount(I2CA_BASE, 2);
I2C_setAddressMode(I2CA_BASE, I2C_ADDR_MODE_7BITS);
I2C_enableFIFO(I2CA_BASE);
I2C_clearInterruptStatus(I2CA_BASE, I2C_INT_ARB_LOST | I2C_INT_NO_ACK);
I2C_setFIFOInterruptLevel(I2CA_BASE, I2C_FIFO_TXEMPTY, I2C_FIFO_RX2);
I2C_enableInterrupt(I2CA_BASE, I2C_INT_ADDR_TARGET | I2C_INT_ARB_LOST | I2C_INT_NO_ACK | I2C_INT_STOP_CONDITION);
I2C_setEmulationMode(I2CA_BASE, I2C_EMULATION_FREE_RUN);
I2C_enableModule(I2CA_BASE);
}
//
// pass - Function to be called if data written matches data read
//
void
pass(void)
{
asm(" ESTOP0");
for(;;);
}
//
// fail - Function to be called if data written does NOT match data read
//
void fail(void)
{
asm(" ESTOP0");
for(;;);
}
void verifyEEPROMRead(void)
{
uint16_t i;
while(I2C_getStatus(I2CA_BASE) & I2C_STS_BUS_BUSY);
for(i=0;i<EEPROM.NumOfDataBytes;i++)
{
if(RX_MsgBuffer[i] != TX_MsgBuffer[i])
{
//Transmitted data doesn't match received data
//Fail condition. PC shouldn't reach here
ESTOP0;
fail();
}
}
}
//
// Main
//
void main()
{
volatile int status = 0;
uint16_t i;
//
// Initialize device clock and peripherals
//
Device_init();
//
// Disable pin locks and enable internal pullups.
//
Device_initGPIO();
//
// Initialize I2C pins
//
I2C_GPIO_init();
//
// Initialize PIE and clear PIE registers. Disable CPU interrupts.
//
Interrupt_initModule();
//
// Initialize the PIE vector table with pointers to the shell Interrupt
// Service Routines (ISR).
//
Interrupt_initVectorTable();
I2Cinit();
EEPROM.TargetAddr = 0x50;
EEPROM.base = I2CA_BASE;
EEPROM.pControlAddr = &ControlAddr;
EEPROM.NumOfAddrBytes = 2;
EEPROM.pTX_MsgBuffer = TX_MsgBuffer;
EEPROM.pRX_MsgBuffer = RX_MsgBuffer;
EEPROM.NumOfAttempts = 5;
EEPROM.Delay_us = 10;
EEPROM.WriteCycleTime_in_us = 6000; //10ms for EEPROM this code was tested
//Example 1: EEPROM Byte Write
//Write 11 to EEPROM address 0x0
ControlAddr = 0x01;
EEPROM.NumOfDataBytes = 1;
TX_MsgBuffer[0] = 11;
status = I2C_ControllerTransmitter(&EEPROM);
//Wait for EEPROM write cycle time
//This delay is not mandatory. User can run their application code instead.
//It is however important to wait for EEPROM write cycle time before you initiate
//another read / write transaction
DEVICE_DELAY_US(EEPROM.WriteCycleTime_in_us);
//Example 2: EEPROM Byte Read
//Make sure 11 is written to EEPROM address 0x0
ControlAddr = 0x01;
EEPROM.pControlAddr = &ControlAddr;
EEPROM.NumOfDataBytes = 1;
status = I2C_ControllerReceiver(&EEPROM);
while(I2C_getStatus(EEPROM.base) & I2C_STS_BUS_BUSY);
verifyEEPROMRead();
}
请纠正我错的地方期待解决方案或提示.
在 TRM 中
'当此模块被配置为 I2C 总线上的一个主器件时、开始和停止条件可由 I2C 模块生成。'
问：执行哪条指令后、我们可以观察 DSO 上的时钟和数据？
在本例中、无法在"void I2Cinit (void)"和"I2C_sendStartCondition (base)；"之后立即查看任何示例程序的 SCL 和 SDA。
问：从任何 TI 电路板的软件和硬件两个方面给出了 I2C 调试的一般步骤。
谢谢。此致、
Ajaykumar V
