TI中文支持网 SysCtlClockSet(SYSCTL_SYSDIV_4|SYSCTL_USE_PLL|SYSCTL_XTAL_16MHZ|SYSCTL_OSC_MAIN);SysCtlPeripheralEnable( SYSCTL_PERIPH_I2C0 );SysCtlPeripheralEnable( SYSCTL_PERIPH_GPIOB );
//配置相应控制端口
GPIOPinConfigure( GPIO_PB3_I2C0SDA );
GPIOPinConfigure( GPIO_PB2_I2C0SCL );
GPIOPinTypeI2CSCL( GPIO_PORTB_BASE, GPIO_PIN_2 );
GPIOPinTypeI2C( GPIO_PORTB_BASE, GPIO_PIN_3 );
//设置I2C模块传输速率，并使能主机控制功能
I2CMasterInitExpClk( I2C0_BASE, SysCtlClockGet(), false );
I2CMasterEnable( I2C0_BASE );//// Enable and configure the GPIO port for the LED operation.//SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOF);GPIOPinTypeGPIOOutput(GPIO_PORTF_BASE, RED_LED|BLUE_LED|GREEN_LED);I2CMasterSlaveAddrSet( I2C0_BASE, 0x50, false);I2CMasterDataPut( I2C0_BASE, 0x00 ); //写入主机数据(寄存器地址)while( I2CMasterErr(I2C0_BASE) | I2CMasterBusy(I2C0_BASE) );I2CMasterControl( I2C0_BASE, I2C_MASTER_CMD_BURST_SEND_START );//主机数据开始传输while( I2CMasterErr(I2C0_BASE) | I2CMasterBusy(I2C0_BASE) );I2CMasterDataPut( I2C0_BASE, 0x06 );//写入主机数据(寄存器内容)while( I2CMasterErr(I2C0_BASE) | I2CMasterBusy(I2C0_BASE) );I2CMasterControl( I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND ); //主机数据+stop传输while( I2CMasterErr(I2C0_BASE) | I2CMasterBusy(I2C0_BASE) );I2CMasterSlaveAddrSet( I2C0_BASE, 0x50, false); //????′?ê?·??ò?a?÷?úD′I2CMasterDataPut( I2C0_BASE, 0x20 );//D′è??÷?úêy?Y(êy?Y??′??÷μ??·)while( I2CMasterErr(I2C0_BASE) | I2CMasterBusy(I2C0_BASE) );I2CMasterControl( I2C0_BASE, I2C_MASTER_CMD_SINGLE_SEND );while( I2CMasterErr(I2C0_BASE) | I2CMasterBusy(I2C0_BASE) );//// Loop Forever//while(1){//// Turn on the LED//GPIOPinWrite(GPIO_PORTF_BASE, RED_LED|BLUE_LED|GREEN_LED, RED_LED);
I2CMasterSlaveAddrSet( I2C0_BASE, 0x50, true);
I2CMasterControl( I2C0_BASE, I2C_MASTER_CMD_SINGLE_RECEIVE );//μ￥′??óê?
while( I2CMasterErr(I2C0_BASE) | I2CMasterBusy(I2C0_BASE) );
Result_H = I2CMasterDataGet( I2C0_BASE );//// Delay for a bit//SysCtlDelay(2000000);//// Turn on the LED//GPIOPinWrite(GPIO_PORTF_BASE, RED_LED|BLUE_LED|GREEN_LED, BLUE_LED);//// Delay for a bit//SysCtlDelay(2000000);}
可以读其他的，就是不能读写AT24C01，好奇怪
xyz549040622：
是不是你的24c01坏了，抓波形看看。24c01的地址好像和别的系列不一样。前提是你的I2C的配置是OK的。最好逻辑分析仪抓波形
xyz549040622：
给你个24c02的测试代码，还是觉得你器件地址的问题
This is the code that has worked for me:MY SLAVE ADDR = 0x50THE CODE WAS ORIGINALLY GIVEN IN SEPARATE FORUMS HERE... I HAVE JUST MODIFIED A BIT ACCORDING TO MY USEI2C MODULE USED = I2C1HAVE SAVED SOME DATA AND RECALLED IT BACK USING REPEATED START TECHNIQUE.THIS CODE I HAVE TESTED WITH PA6 = SCL & PA7 = SDA AND WORKD FINE WITH 24C02#include <stdint.h> // ift #include <stdbool.h> #include "inc/hw_types.h" #include "inc/hw_memmap.h" #include "driverlib/sysctl.h" #include "driverlib/gpio.h" #include "driverlib/i2c.h" #include "driverlib/rom.h" #include "driverlib/pin_map.h" #include "inc/tm4c123gh6pm.h" #include "inc/hw_i2c.h"int i = 0; uint8_t lcd[5]={0x99,0x88,0x77,0x66,0x54};int main(void) { unsigned long data; // // Set the clocking to run directly from the external crystal/oscillator. // TODO: The SYSCTL_XTAL_ value must be changed to match the value of the // crystal on your board. // SysCtlClockSet(SYSCTL_SYSDIV_1 | SYSCTL_USE_OSC | SYSCTL_OSC_MAIN |SYSCTL_XTAL_16MHZ);// // The I2C1 peripheral must be enabled before use. // SysCtlPeripheralEnable(SYSCTL_PERIPH_I2C1);// // For this example I2C0 is used with PortB[3:2]. The actual port and // pins used may be different on your part, consult the data sheet for // more information. GPIO port B needs to be enabled so these pins can // be used. // TODO: change this to whichever GPIO port you are using. // SysCtlPeripheralEnable(SYSCTL_PERIPH_GPIOA);// // Select the I2C function for these pins. This function will also // configure the GPIO pins pins for I2C operation, setting them to // open-drain operation with weak pull-ups. Consult the data sheet // to see which functions are allocated per pin. // TODO: change this to select the port/pin you are using. // //GPIOPinTypeI2C(GPIO_PORTB_BASE, GPIO_PIN_2 | GPIO_PIN_3); GPIOPinTypeI2CSCL(GPIO_PORTA_BASE, GPIO_PIN_6); // I2CSCL GPIOPinTypeI2C(GPIO_PORTA_BASE, GPIO_PIN_7);// // Configure the pin muxing for I2C0 functions on port B2 and B3. // This step is not necessary if your part does not support pin muxing. // TODO: change this to select the port/pin you are using. // GPIOPinConfigure(GPIO_PA6_I2C1SCL); GPIOPinConfigure(GPIO_PA7_I2C1SDA);// // Enable and initialize the I2C0 master module. Use the system clock for // the I2C0 module. The last parameter sets the I2C data transfer rate. // If false the data rate is set to 100kbps and if true the data rate will // be set to 400kbps. For this example we will use a data rate of 100kbps. // I2CMasterInitExpClk(I2C1_BASE, SysCtlClockGet(), false);// // Tell the master module what address it will place on the bus when // communicating with the slave. Set the address to SLAVE_ADDRESS // (as set in the slave module). The receive parameter is set to false // which indicates the I2C Master is initiating a writes to the slave. If // true, that would indicate that the I2C Master is initiating reads from // the slave. //while(1) { I2CMasterSlaveAddrSet(I2C1_BASE, 0x50, false); // The address of the Slave is 0x50I2CMasterDataPut(I2C1_BASE, 0x10); // Addr 0x10I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_START);while(I2CMasterBusy(I2C1_BASE));for (i=0;i<5;i++) { I2CMasterDataPut(I2C1_BASE, lcd[i]); // data to be saved at Addr 0x11 under autoincrement modeI2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_CONT);while(I2CMasterBusy(I2C1_BASE));}//I2CMasterDataPut(I2C1_BASE, 0xee); // data to be saved at Addr 0x12 under autoincrement modeI2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_SEND_FINISH);while(I2CMasterBusy(I2C1_BASE)); //////// write complete///////////////////////////////////////////////////////////////////////////////// SysCtlDelay(5500000); // writing time/////////////////////////////////////////////////////////////// // Read at address 0x11 I2CMasterSlaveAddrSet(I2C1_BASE, 0x50, false);I2CMasterDataPut(I2C1_BASE, 0x10); // Addr 0x11I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_SINGLE_SEND);while(I2CMasterBusy(I2C1_BASE));I2CMasterSlaveAddrSet(I2C1_BASE, 0x50, true);data = I2CMasterDataGet(I2C1_BASE); //Receive//I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_SINGLE_RECEIVE);I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_RECEIVE_START); // while(I2CMasterBusy(I2C1_BASE));data = I2CMasterDataGet(I2C1_BASE); //testfor (i=0;i<4;i++) { I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_RECEIVE_CONT); // while(I2CMasterBusy(I2C1_BASE));data = I2CMasterDataGet(I2C1_BASE); //Receive }I2CMasterControl(I2C1_BASE, I2C_MASTER_CMD_BURST_RECEIVE_FINISH); // while(I2CMasterBusy(I2C1_BASE));} //return(0); }
Sparrow：
回复 xyz549040622:
我试了一下，还是一样的死掉了，如果说是芯片坏了的话，我试了好几个了。真不知道为什么
