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器件型号：TMS320F280025C //############################################################################# // // FILE: i2c_ex4_RTC_polling.c // // TITLE: I2C RTC Write / Read using polling // //! \addtogroup driver_example_list //! <h1>I2C RTC</h1> //! //! This program will shows how to perform different RTC write and read //! commands using I2C polling method //! RTC used for this example is AT24C256 //! //! \b External \b Connections \n //! - Connect external I2C RTC at address 0x50 //! -------------------------------- //! Signal | I2CA | RTC //! -------------------------------- //! SCL | DEVICE_GPIO_PIN_SCLA | SCL //! SDA | DEVICE_GPIO_PIN_SDAA | SDA //! Make sure to connect GND pins if RTC and C2000 device are in different board. //! -------------------------------- //! //Example 1: RTC Byte Write //! //Example 2: RTC Byte Read //! //Example 3: RTC word (16-bit) write //! //Example 4: RTC word (16-bit) read //! //Example 5: RTC Page write //! //Example 6: RTC word Paged read //! //! \b Watch \b Variables \n //! - \b TX_MsgBuffer - Message buffer which stores the data to be transmitted //! - \b RX_MsgBuffer - Message buffer which stores the data to be received //! //! //############################################################################# // // // $Copyright: // Copyright (C) 2023 Texas Instruments Incorporated - http://www.ti.com/ // // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions // are met: // // Redistributions of source code must retain the above copyright // notice, this list of conditions and the following disclaimer. // // Redistributions in binary form must reproduce the above copyright // notice, this list of conditions and the following disclaimer in the // documentation and/or other materials provided with the // distribution. // // Neither the name of Texas Instruments Incorporated nor the names of // its contributors may be used to endorse or promote products derived // from this software without specific prior written permission. // // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. // $ //############################################################################# // // Included Files // #include "driverlib.h" #include "device.h" #include "i2cLib_FIFO_polling.h" // // Globals // struct I2CHandle RTC; struct I2CHandle *currentMsgPtr; // Used in interrupt //! -------------------------------- //! Signal | I2CA | RTC //! -------------------------------- //! SCL | DEVICE_GPIO_PIN_SCLA | SCL //! SDA | DEVICE_GPIO_PIN_SDAA | SDA //! -------------------------------- uint16_t passCount = 0; uint16_t failCount = 0; uint16_t AvailableI2C_targets[20]; uint16_t TX_MsgBuffer[MAX_BUFFER_SIZE]; uint16_t RX_MsgBuffer[MAX_BUFFER_SIZE]; uint32_t ControlAddr; uint16_t status; //uint8_t set_time[3]; typedef struct{ unsigned int seconds; unsigned int minutes ; unsigned int hour ; unsigned int dayofweek; unsigned int dayofmonth; unsigned int month ; unsigned int year ; }TIME; TIME time; void fail(void); void pass(void); void I2C_GPIO_init(void); void I2Cinit(void); void verifyRTCRead(void); void Get_Time (void); unsigned int bcdToDec(unsigned int ); #define ds_3231N 0x68; // // Main // void main(void) { // // 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(); //I2Cs connected to I2CA will be found in AvailableI2C_targets buffer //after you run I2CBusScan function. //uint16_t *pAvailableI2C_targets = AvailableI2C_targets; // status = I2CBusScan(I2CA_BASE, pAvailableI2C_targets); uint16_t i; for(i=0;i<5;i++) { TX_MsgBuffer[i] = 0; RX_MsgBuffer[i] = 0; } RTC.TargetAddr = ds_3231N; RTC.base = I2CA_BASE; RTC.pControlAddr = &ControlAddr; RTC.NumOfAddrBytes = 2; RTC.pTX_MsgBuffer = TX_MsgBuffer; RTC.pRX_MsgBuffer = RX_MsgBuffer; RTC.NumOfAttempts = 5; RTC.Delay_us = 10; RTC.WriteCycleTime_in_us = 1200; //10ms for RTC this code was tested while(1) { ControlAddr = 0X00; RTC.pControlAddr = &ControlAddr; RTC.NumOfDataBytes = 3; status = I2C_ControllerReceiver(&RTC); while(I2C_getStatus(RTC.base) & I2C_STS_BUS_BUSY); Get_Time (); //verifyRTCRead(); } if(status) { fail(); } else { pass(); } if(status) { fail(); } else { pass(); } } // // 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 verifyRTCRead(void) { uint16_t i; while(I2C_getStatus(RTC.base) & I2C_STS_BUS_BUSY); for(i=0;i<RTC.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(); } } } 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, 400000, 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); } void Get_Time (void) { time.seconds = bcdToDec(RX_MsgBuffer[0]); time.minutes = bcdToDec(RX_MsgBuffer[1]); time.hour = bcdToDec(RX_MsgBuffer[2]); } unsigned int decToBcd( unsigned int val) { return (uint8_t)( (val/10*16) + (val%10) ); } // Convert binary coded decimal to normal decimal numbers unsigned int bcdToDec(unsigned int val) { return (int)( (val/16*10) + (val%16) ); } // // End of File //
此代码用于 DS3231N RTC 与 TMSF280025c board...in 接口此代码旨在读取 RTC 中的...但我无法读取数据...
我知道当我调试时、我吸入了这个函数
状态= I2C_ControllerReceiver (&RTC)；在该函数中，发生了此函数......... while (I2C_getStopConditionStatus (base)&& quertCount <= 3U)；
请告诉我解决这个问题的方法。。。 如何知道在哪里我遇到问题...和多少时钟,我们必须给时钟 th i2c
和总线扫描功能也不工作....没有总线功能代码会工作吗?
