STM32F407单片机24bit_ADC_AD7190称重模块+16bit_DAC_电压输出实验KEIL工程源码 int main(void) { uint16_t data=0xFFFF/2; double temp,opa; float data_temp; int32_t weight_count; uint8_t cali_flag=0; /* 复位所有外设，初始化Flash接口和系统滴答定时器 */ HAL_Init(); /* 配置系统时钟 */ SystemClock_Config(); /* 初始化串口并配置串口中断优先级 */ MX_DEBUG_USART_Init(); /* 初始化LED */ LED_GPIO_Init(); KEY_GPIO_Init(); /* 初始化BEEP */ BEEP_GPIO_Init(); if(AD7190_Init()==0) { printf("获取不到 AD7190 !\n"); while(1) { HAL_Delay(1000); if(AD7190_Init()) break; } } printf("检测到 AD7190 !\n"); weight_ad7190_conf(); HAL_Delay(500); weight_Zero_Data = weight_ad7190_ReadAvg(6); printf("zero:%d\n",weight_Zero_Data); printf("硬石DAC（AD5689）模块模拟量电压输出\n"); AD5689_Init(); AD5689_WriteUpdate_DACREG(DAC_A,data); AD5689_WriteUpdate_DACREG(DAC_B,0xFFFF-data); printf("data:%d\n",data); opa=OPA_RES_R2/OPA_RES_R1; while(1) { weight_count=weight_ad7190_ReadAvg(3); data_temp=weight_count-weight_Zero_Data; weight=data_temp*1000/weight_proportion; printf("重量：%d->%.2f\n",weight_count,weight); HAL_Delay(200); if(KEY1_StateRead()==KEY_DOWN) // 清零 { weight_Zero_Data = weight_ad7190_ReadAvg(6); printf("zero:%d\n",weight_Zero_Data); cali_flag=1; } if(KEY2_StateRead()==KEY_DOWN) // 校准：必须先按“清零”键，然后把20g砝码放在称上，按下校准键 { if(cali_flag) { weight_count = weight_ad7190_ReadAvg(6); weight_proportion=(weight_count-weight_Zero_Data)*1000/100; printf("weight_proportion:%d\n",weight_proportion); } cali_flag=0; } if(KEY3_StateRead()==KEY_DOWN) { if(data>(0xFFFF-1000)) data=(0xFFFF-1000); data +=1000; AD5689_WriteUpdate_DACREG(DAC_A,data); AD5689_WriteUpdate_DACREG(DAC_B,0xFFFF-data); temp=(double)(data*2-0xFFFF)*2500*opa/0xFFFF; //temp为目标电源值，这里先放大1000倍（方便计算而已），等后面显示再还原 //data是数字量DA值，当data取值