工具与软件：
你(们)好
我使用 LP-MSPM0G3507与 EEPROM (24C02)连接、 我尝试使用 i2c_target_rw_multibyte_fifo_interrupts_LP_MSPM0G3507_nortos_ticlang 示例代码
从器件 ID 更改为0x50、不使用47k Ω 上拉电阻。 I2C SDA 和 SCL 线路始终为高电平、这表示未正确建立通信
我曾将 MSP430F5529 Launchpad 与相同的 EEPROM 配合使用、它可以进行所有操作。
提前感谢。
此致、
Yogesh
Bruce、您好！
我无法在逻辑分析仪上看到 Rx 事务(附加的波形)
如果对 Tx 相关代码进行了注释、我能够仅查看 Rx 事务
Bruce、您好！
感谢您的支持。 我使用的代码与您提供的代码相同。
/*
* Copyright (c) 2021, Texas Instruments Incorporated
* All rights reserved.
*
* 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.
*/
#include "ti_msp_dl_config.h"
/* Maximum size of TX packet */
#define I2C_TX_MAX_PACKET_SIZE (3)
/* Number of bytes to send to target device */
#define I2C_TX_PACKET_SIZE (3)
/* Maximum size of RX packet */
#define I2C_RX_MAX_PACKET_SIZE (3)
/* Number of bytes to received from target */
#define I2C_RX_PACKET_SIZE (3)
/* I2C Target address */
#define I2C_TARGET_ADDRESS (0x50)
/* Data sent to the Target */
uint8_t gTxPacket[I2C_TX_MAX_PACKET_SIZE] = {0x00, 0x00, 0x02};
// 0x03, 0x04,
// 0x05, 0x06, 0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F};
/* Counters for TX length and bytes sent */
uint32_t gTxLen, gTxCount;
/* Data received from Target */
uint8_t gRxPacket[I2C_RX_MAX_PACKET_SIZE];
/* Counters for TX length and bytes sent */
uint32_t gRxLen, gRxCount;
/* Indicates status of I2C */
enum I2cControllerStatus {
I2C_STATUS_IDLE = 0,
I2C_STATUS_TX_STARTED,
I2C_STATUS_TX_INPROGRESS,
I2C_STATUS_TX_COMPLETE,
I2C_STATUS_RX_STARTED,
I2C_STATUS_RX_INPROGRESS,
I2C_STATUS_RX_COMPLETE,
I2C_STATUS_ERROR,
} gI2cControllerStatus;
int main(void)
{
SYSCFG_DL_init();
/* Set LED to indicate start of transfer */
DL_GPIO_setPins(GPIO_LEDS_PORT, GPIO_LEDS_USER_LED_1_PIN);
NVIC_EnableIRQ(I2C_INST_INT_IRQN);
DL_SYSCTL_disableSleepOnExit();
gI2cControllerStatus = I2C_STATUS_IDLE;
gTxLen = I2C_TX_PACKET_SIZE;
gTxCount = DL_I2C_fillControllerTXFIFO(I2C_INST, &gTxPacket[0], gTxLen);
if (gTxCount < gTxLen) {
DL_I2C_enableInterrupt(I2C_INST, DL_I2C_INTERRUPT_CONTROLLER_TXFIFO_TRIGGER);
} else {
DL_I2C_disableInterrupt(I2C_INST, DL_I2C_INTERRUPT_CONTROLLER_TXFIFO_TRIGGER);
}
gI2cControllerStatus = I2C_STATUS_TX_STARTED;
while (!(DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_IDLE));
DL_I2C_startControllerTransfer(I2C_INST, I2C_TARGET_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_TX, gTxLen);
while ((gI2cControllerStatus != I2C_STATUS_TX_COMPLETE) && (gI2cControllerStatus != I2C_STATUS_ERROR)) {
__WFE();
}
while (DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_BUSY_BUS);
/* Trap if there was an error */
if (DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_ERROR) {
/* LED will remain high if there is an error */
__BKPT(0);
}
while (!(DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_IDLE));
/* Add delay between transfers */
delay_cycles(300000);
/* Send a read request to Target */
gRxLen = I2C_RX_PACKET_SIZE;
gRxCount = 0;
gI2cControllerStatus = I2C_STATUS_RX_STARTED;
DL_I2C_startControllerTransfer(I2C_INST, I2C_TARGET_ADDRESS, DL_I2C_CONTROLLER_DIRECTION_RX, gRxLen);
//************I2C read register **********************
while (gI2cControllerStatus != I2C_STATUS_RX_COMPLETE) {
__WFE();
}
while (DL_I2C_getControllerStatus(I2C_INST) & DL_I2C_CONTROLLER_STATUS_BUSY_BUS) ;
/* If write and read were successful, toggle LED */
while (1) {
DL_GPIO_togglePins(GPIO_LEDS_PORT,
GPIO_LEDS_USER_LED_1_PIN | GPIO_LEDS_USER_TEST_PIN);
delay_cycles(16000000);
}
}
void I2C_INST_IRQHandler(void)
{
switch (DL_I2C_getPendingInterrupt(I2C_INST)) {
case DL_I2C_IIDX_CONTROLLER_RX_DONE:
gI2cControllerStatus = I2C_STATUS_RX_COMPLETE;
break;
case DL_I2C_IIDX_CONTROLLER_TX_DONE:
DL_I2C_disableInterrupt(
I2C_INST, DL_I2C_INTERRUPT_CONTROLLER_TXFIFO_TRIGGER);
gI2cControllerStatus = I2C_STATUS_TX_COMPLETE;
break;
case DL_I2C_IIDX_CONTROLLER_RXFIFO_TRIGGER:
gI2cControllerStatus = I2C_STATUS_RX_INPROGRESS;
/* Receive all bytes from target */
while (DL_I2C_isControllerRXFIFOEmpty(I2C_INST) != true) {
if (gRxCount < gRxLen) {
gRxPacket[gRxCount++] =
DL_I2C_receiveControllerData(I2C_INST);
} else {
/* Ignore and remove from FIFO if the buffer is full */
DL_I2C_receiveControllerData(I2C_INST);
}
}
break;
case DL_I2C_IIDX_CONTROLLER_TXFIFO_TRIGGER:
gI2cControllerStatus = I2C_STATUS_TX_INPROGRESS;
/* Fill TX FIFO with next bytes to send */
if (gTxCount < gTxLen) {
gTxCount += DL_I2C_fillControllerTXFIFO(
I2C_INST, &gTxPacket[gTxCount], gTxLen - gTxCount);
}
break;
/* Not used for this example */
case DL_I2C_IIDX_CONTROLLER_ARBITRATION_LOST:
case DL_I2C_IIDX_CONTROLLER_NACK:
if ((gI2cControllerStatus == I2C_STATUS_RX_STARTED) ||
(gI2cControllerStatus == I2C_STATUS_TX_STARTED)) {
/* NACK interrupt if I2C Target is disconnected */
gI2cControllerStatus = I2C_STATUS_ERROR;
}
case DL_I2C_IIDX_CONTROLLER_RXFIFO_FULL:
case DL_I2C_IIDX_CONTROLLER_TXFIFO_EMPTY:
case DL_I2C_IIDX_CONTROLLER_START:
case DL_I2C_IIDX_CONTROLLER_STOP:
case DL_I2C_IIDX_CONTROLLER_EVENT1_DMA_DONE:
case DL_I2C_IIDX_CONTROLLER_EVENT2_DMA_DONE:
default:
break;
}
}
我正在尝试使用0x02写入0x0000存储器位置。 同时、我正在尝试读取 EEPROM 的0x0000地址。
提前感谢。
此致、
Yogesh
Bruce、您好！
感谢您的热情支持。
我已将 I2C_TX_PACKET_SIZE 修改为1、然后可以看到先前对这些存储器位置的写入
MSPM0实现存在多种疑问。 一些函数、比如
EEPROM_ByteWrite (0x0005、0x89)；
__delay_cycles (3000)；
EEPROM_AckPolling ()；
__delay_cycles (3000)；
unsigned char Read_val = EEPROM_RandomRead (0x0005)；//从地址0x0000读取
__delay_cycles (3000)；
上述功能非常有用、用户友好。 我们是否有类似的函数来读取或写入特定的存储器位置。
此致、
Yogesh
