There are some problems when using the TMS320F28035 chip:
Objective: To use the ADCINA1 passband of the TMS320F28035 chip (56-pin) for power supply voltage measurement
Tools: Already have TMS320F28035 chip (64 pin) ADCINA1 measure the power supply voltage code (after the test code is correct, can normally read 0-3.3V voltage value), the specific code is as follows:
First, the main.c code:
#include "DSP2803x_Device.h" // DSP2833x Headerfile Include File
#include "DSP2803x_Examples.h" // DSP2833x Examples Include Fi
#include "stdio.h"
#include "Battery.h"
#include "leds.h"
#include "Tim.h"
extern Uint16 RamfuncsLoadSize;
/******************************************************************************
*函数原型: void main(void)
*函数功能: 飞控主函数
*******************************************************************************/
void main(void)
{
InitSysCtrl();
DINT;
InitPieCtrl();
IER = 0x0000;
IFR = 0x0000;
InitPieVectTable();
memcpy(&RamfuncsRunStart, &RamfuncsLoadStart, (Uint32)&RamfuncsLoadSize);
LED_Init(); // 初始化LED-
BatteryCheckInit(); // 初始化电池检测ADC-
BatteryCheck(); // 检测电池电压;软件触发ADC采集-
Timer0_init(); // 定时器0初始化，1ms周期中断-
PieCtrlRegs.PIECTRL.bit.ENPIE = 1;
EINT;
ERTM;
while(1)
{
/* 电源电压检测及片上温度检测；信号灯提示（100ms为一个周期）*/
if(timer0Base.loop10HzCnt >= 1000)
{
timer0Base.loop10HzCnt=0;
BatteryCheck(); // 电源电压监控
TemperatureCheck(); // 片上温度采集
//LEDFSM(); // 信号灯提示
LED1_TOGGLE;
LED2_TOGGLE;
}
}
}
Battery.c code
#include "Battery.h"
#include "stdio.h"
Bat_Typedef Battery;
int adcVal[2]={0};//ADC 采样结果
char adcISRFlag=0;//ADC 中断标识
int16 degC; //temperature in deg. C
interrupt void adc_isr(void);
/*******************************************************************************
* 函 数 名: void BatteryCheckInit(void)
* 函数功能: AD初始化；将模拟值输入到A1通道
*******************************************************************************/
void BatteryCheckInit(void)
{
InitAdc(); // 初始化ADC对应的GPIO
EALLOW;
PieVectTable.ADCINT3 = &adc_isr; // AD中断函数映射
EDIS;
PieCtrlRegs.PIEIER10.bit.INTx3 = 1;//使能 PIE 的 INT10.3
IER |= M_INT10;
EALLOW;
AdcRegs.ADCCTL2.bit.ADCNONOVERLAP = 1; //不允许重叠采样
AdcRegs.ADCCTL1.bit.TEMPCONV = 1; //设置片上温度传感器
FlashRegs.FOTPWAIT.bit.OTPWAIT = 1; //设置 flash OTP 等待状态为最小，以保证温度转换函数的性能
EDIS;
EALLOW;
AdcRegs.ADCCTL1.bit.ADCREFSEL = 0; //Internal Bandgap//内部带隙产生参考电压
AdcRegs.ADCCTL1.bit.INTPULSEPOS = 1; //ADCINT1 trips 产生中断脉冲， 1 个周期后 ADC 锁存到结果寄存器。
AdcRegs.INTSEL3N4.bit.INT3E = 1; //Enabled ADCINT3
AdcRegs.INTSEL3N4.bit.INT3CONT = 0; //禁止连续转换模，single conversion mode 直到 ADCINTx 标志 （在 ADCINTFLG 寄存器） 由用户清除， 无进一步的 ADCINTx脉冲产生。
AdcRegs.INTSEL3N4.bit.INT3SEL = 1; //创建EOC1，EOC1 为 ADCINTx 的触发。
AdcRegs.ADCSOC0CTL.bit.TRIGSEL = 0x00; //软件触发，没有 ADCINT 触发 SOCx。 TRIGSEL 位域确定 SOCx 触发。
AdcRegs.ADCSOC1CTL.bit.TRIGSEL = 0x00; //软件触发，没有 ADCINT 触发 SOCx。 TRIGSEL 位域确定 SOCx 触发。
AdcRegs.ADCSOC0CTL.bit.CHSEL = 5; //片上温度采集，SOCx通道选择
AdcRegs.ADCSOC1CTL.bit.CHSEL = 1; //电源采集，SOCx 通道选择
AdcRegs.ADCSOC0CTL.bit.ACQPS = 6; //设置窗口，SOCx 采样预定标， 为 SOCx 控制采样保持窗口， 最小值为6
AdcRegs.ADCSOC1CTL.bit.ACQPS = 6; //设置窗口，采样窗为7 个周期长 （6 + 1 时钟周期）
EDIS;
Battery.ADRef = 3.31; // 实际测量的MCU供电电压
Battery.Bat_K = 1.0; // 电压校准系数
Battery.overDischargeCnt = 0;
Battery.Calisum = 0.0; // 电池的sum校准系数
printf("\r\nADC(BATTERY) init...OK");
}
/*******************************************************************************
* 函 数 名: void BatteryCheckInit(void)
* 函数功能: AD 中断处理函数
*******************************************************************************/
interrupt void adc_isr(void)
{
EALLOW;
PieCtrlRegs.PIEACK.all = PIEACK_GROUP10;//Acknowledge interrupt to PIE
EDIS;
AdcRegs.ADCINTFLGCLR.bit.ADCINT3 = 1; //Clear ADCINT1 flag
adcISRFlag = 1;
adcVal[0]=AdcResult.ADCRESULT0; //温度
adcVal[1]=AdcResult.ADCRESULT1; //电压
}
/*******************************************************************************
* 函 数 名: int GetBatteryAD(u8 ch)
* 函数功能: 获取电池单次的ADC
*******************************************************************************/
int GetBatteryAD(u8 ch)
{
AdcRegs.ADCSOCFRC1.all = 0X03; //软件触发AD 的 SOC0--SOC1采样
if(adcISRFlag == 1)
{
adcISRFlag = 0;
}
return adcVal[ch];
}
/*******************************************************************************
* 函 数 名: int Get_Adc_Average(u8 ch,u8 times)
* 函数功能: 获取A1通道的AD值
*******************************************************************************/
int Get_Adc_Average(u8 ch,u8 times)
{
int temp_val=0;
u8 t;
for(t=0;t<times;t++)
{
temp_val+=(GetBatteryAD(ch));
}
return temp_val/times;
}
/*******************************************************************************
* 函 数 名: void TemperatureCheck(void)
* 函数功能: 检测MCU温度
*******************************************************************************/
void TemperatureCheck(void)
{
degC = GetTemperatureC(Get_Adc_Average(0,5));// 片上温度采样
}
/*******************************************************************************
* 函 数 名: void BatteryCheck(void)
* 函数功能: 检测电池电压；过放报警和过放保护
*******************************************************************************/
void BatteryCheck(void)
{
Battery.BatteryAD = Get_Adc_Average(1,5); // 滤波后的电压值
//printf("\r\n滤波后的电压值：%d\n",Battery.BatteryAD);
Battery.BatteryVal = (float)(Battery.Bat_K*((Battery.BatteryAD/4096.0)*Battery.ADRef))+Battery.Calisum;//实际电压值计算
printf("\r\n实际电压值：%f\n",Battery.BatteryVal);
if(1)
{
if(Battery.BatteryVal <= (BAT_OVERDIS_VAL + 0.03))
{
Battery.alarm=1; // 报警位
}else{
Battery.alarm=0;
}
if(Battery.BatteryVal <= BAT_OVERDIS_VAL)
{
Battery.overDischargeCnt++; // 过放保护计数
if(Battery.overDischargeCnt > 3)
{
}
}else
{
Battery.overDischargeCnt = 0;
}
}
else
{
if(Battery.BatteryVal < BAT_ALARM_VAL) // 3.65V
{
Battery.alarm=1; // 报警位
}else{
Battery.alarm=0;
}
}
}
Battery.h code
#ifndef INC_BATTERY_H_
#define INC_BATTERY_H_
#include "DSP2803x_Device.h" // DSP2833x Headerfile Include File
#include "DSP2803x_Examples.h" // DSP2833x Examples Include Fi
#define uint8_t unsigned char
#define uint16_t unsigned short
#define uint32_t unsigned long
#define uint64_t unsigned long long
#define int8_t signed char
#define int16_t signed short
#define int32_t signed long
#define int64_t signed long long
typedef int8_t s8;
typedef uint8_t u8;
typedef int16_t s16;
typedef uint16_t u16;
typedef int32_t s32;
typedef uint32_t u32;
extern int adcVal[];//ADC 采样结果
extern char adcISRFlag;//ADC 中断标识
extern int16 degC;
#define BAT_CHK_PRD 500
#define BAT_ALARM_VAL 3.65
#define BAT_OVERDIS_VAL 3.15
//电压信息结构体
typedef struct
{
float ADRef; // AD参考源
float Bat_K; // 计算电压值
char alarm; // 电池报警位
char chargeSta; // 充电状态
float BatteryVal; // 电压
int BatteryAD; // 电压
int overDischargeCnt; // 过放保护计数
float Calisum;
}Bat_Typedef;
extern Bat_Typedef Battery;
/*函数声明*/
void BatteryCheckInit(void);
int Get_Adc_Average(u8 ch,u8 times);
int GetBatteryAD(u8 ch);
void TemperatureCheck(void);
void BatteryCheck(void);
#endif /* INC_BATTERY_H_ */
After my test, the code in TMS320F28035 (64 pin) can normally collect the power supply voltage through the ADCINA1 channel. Due to work requirements, now I need to switch to the chip TMS320F28035 (56-pin), which also needs to collect the power supply voltage. Using the same code and ADCINA1 channel, I failed to collect the real power supply voltage, and the collected result is displayed as about 0.0V. I have the following problems:
1. The corresponding pin of ADCINA1 of TMS320F28035 (56-pin) is 12, while the corresponding pin of ADCINA1 of (64-pin) is 14. Do I need to configure the pin (or GPIO) in ccs software?
2. The hardware schematic diagram I drew is as follows. It can be seen that the acquisition line of ADCINA1 is directly connected to the battery power line (full voltage 4.2v for 1s lithium battery). I did not use the voltage division circuit for voltage reduction, is it possible that the ADCINA1 interface has been burned out?
3. Run the program in the control board I drew with the above code, and the voltage value collected by the ADC has been changing around 0.055615v (maximum 0.1v). Does this mean that the ADCINA1 acquisition port is grounded?
4. If I place the ADC1 acquisition port behind the capacitor (as shown below), can I use it directly without adding other voltage divider circuits?
5. If the divider circuit must be used, how to draw the detailed schematic diagram of the divider ADC collection divider circuit?
Urgently need to solve, hope to get your reply as soon as possible,thanks!!!
