BQ76PL455电压检测的问题

Jianwei Zhuo

使用BQ76PL455EVM和TMS57004 LaunchPad 开发板，接入16节串联电池组。只有在读取电压的那一行程序处设置断点，程序运行至断点才能读取到正确的电压。但是如果不设置断点，让程序运行起来，就会读取到全部相同的错误的电压。帖子的最后附上我程序的压缩包

以下是断点处读取的电压

以下是错误的数据：

最后附上我的程序：

/* Include Files */

#include "sys_common.h"
#include "system.h"

/* USER CODE BEGIN (1) */
#include "gio.h"
#include "sci.h"
#include "rti.h"
#include "sys_vim.h"
#include "swi_util.h"

#include "pl455.h"

int UART_RX_RDY = 0;
int RTI_TIMEOUT = 0;
BYTE bFrame[39];
/* USER CODE END */

/** @fn void main(void)
*   @brief Application main function
*   @note This function is empty by default.
*
*   This function is called after startup.
*   The user can use this function to implement the application.
*/

/* USER CODE BEGIN (2) */
/* USER CODE END */
void delay_loop();
void main(void)
{
/* USER CODE BEGIN (3) */
systemInit();
gioInit();
sciInit();
sciSetBaudrate(scilinREG, BAUDRATE);
rtiInit();
vimInit();

_enable_IRQ();

WakePL455();

CommClear();

CommReset();

// initialize local variables
int nSent, nRead, nTopFound = 0;
int nDev_ID, nGrp_ID;

uint32 wTemp = 0;

nSent = WriteReg(0, 13, 0x10, 1, FRMWRT_ALL_NR); // 选中16节电池
nSent = WriteReg(0, 3, 0xFFFF00C0, 4, FRMWRT_ALL_NR);
while(1)
{
   nDev_ID = 0;
   nSent = WriteReg(nDev_ID, 2, 0x00, 1, FRMWRT_SGL_R); // send read sampled values command
   nSent = WaitRespFrame(bFrame, 39, 0);// 24 bytes data + packet header + CRC, 0ms timeout
   gioToggleBit(gioPORTA, 2); //此处设置断点
   delayms(500);
//   delay_loop();

}

/* USER CODE END */
}

void delay_loop() {
long x, y;
for (y = 0; y < 10; y++)
for (x = 0; x < 50000; x++) {
}
}

/* USER CODE BEGIN (4) */
/* USER CODE END */

bq76PL455A-Q1 Example Code.rar

6 年多前

0 Cheng.W 6 年多前

TI__Mastermind 25235 points

把while循环的指令改成

nSent = WriteReg(nDev_ID, 2, 0x00, 1, FRMWRT_SGL_NR); // send sample and store command

delayms(6);

nSent = WriteReg(nDev_ID, 2, 0x20, 1, FRMWRT_SGL_R); // send read sampled values command

nSent = WaitRespFrame(bFrame, 39, 0);// 24 bytes data + packet header + CRC, 0ms timeout

0 Jianwei Zhuo 6 年多前回复 Cheng.W

Prodigy 164 points

我把While循環裏面改了，結果還是一樣的，讀到的一直是D0BA，這是爲什麽？

/* USER CODE BEGIN (0) */
/* USER CODE END */

/* Include Files */

#include "sys_common.h"
#include "system.h"

/* USER CODE BEGIN (1) */
#include "gio.h"
#include "sci.h"
#include "rti.h"
#include "sys_vim.h"
#include "swi_util.h"

#include "pl455.h"

int UART_RX_RDY = 0;
int RTI_TIMEOUT = 0;
BYTE bFrame[39];
/* USER CODE END */

/* USER CODE BEGIN (2) */
/* USER CODE END */

void main(void)
{
/* USER CODE BEGIN (3) */
systemInit();
gioInit();
sciInit();
sciSetBaudrate(scilinREG, BAUDRATE);
rtiInit();
vimInit();

_enable_IRQ();

WakePL455();

CommClear();

CommReset();

// initialize local variables
int nSent, nRead, nTopFound = 0;
int nDev_ID, nGrp_ID;
sciSetBaudrate(scilinREG, BAUDRATE);
uint32 wTemp = 0;

nSent = WriteReg(0, 13, 0x10, 1, FRMWRT_ALL_NR); // set number of cells to 16
nSent = WriteReg(0, 3, 0xFFFF00C0, 4, FRMWRT_ALL_NR);

while(1)
{
   nDev_ID = 0;
//   nSent = WriteReg(nDev_ID, 2, 0x00, 1, FRMWRT_SGL_R); // send read sampled values command
//   nSent = WaitRespFrame(bFrame, 39, 0);// 24 bytes data + packet header + CRC, 0ms timeout
//   gioToggleBit(gioPORTA, 2);
//   delayms(500);

   nSent = WriteReg(nDev_ID, 2, 0x00, 1, FRMWRT_SGL_NR); // send sample and store command
   delayms(6);
   nSent = WriteReg(nDev_ID, 2, 0x20, 1, FRMWRT_SGL_R); // send read sampled values command
   nSent = WaitRespFrame(bFrame, 39, 0);// 24 bytes data + packet header + CRC, 0ms timeout
   delayms(6);
}

/* USER CODE END */
}

/* USER CODE BEGIN (4) */
/* USER CODE END */