更新：

1、ADS1220采集正常，正负电压都很准（信号发生器mv）；
2、ADS1220的DRDY脚不能悬空，上拉后问题解决；

App/ADS1220/ads1220.c

@@ -280,6 +280,8 @@ static void ads1220_get_conversion_data(float32 *conversionData)
 	{
 		data_1220 ^= 0x00FFFFFF;
 		data_1220 += 1;
+
+		data_1220 *= -1;
 	}
 
 	//mv
@@ -345,7 +347,7 @@ void ads1220_operation(uint8_t channel, float32 *data_pv)
 			ADS1220_OP_MODE_NORMAL,			// 工作模式选择
 			ADS1220_CONVERSION_SINGLE_SHOT, // 转换模式*
 			ADS1220_DATA_RATE_45SPS,		// 数据速率*
-			ADS1220_GAIN_8,					// 增益配置*
+			ADS1220_GAIN_1,					// 增益配置*
 			ADS1220_PGA_BYPASS,				// 禁止/启用可编程增益放大器
 			ADS1220_IDAC1_DISABLED,			// 选择IDAC1将路由到的通道
 			ADS1220_IDAC2_DISABLED,			// 选择IDAC2将路由到的通道

App/DAC7811/dac7811.c

@@ -10,24 +10,25 @@ BOOL dac7811_spi_init_flag = FALSE;
 
 void fun_dac7811_spi1_init()
 {
-    hspi1.Instance = SPI1;
+    // hspi1.Instance = SPI1;
-    hspi1.Init.Mode = SPI_MODE_MASTER;
+    // hspi1.Init.Mode = SPI_MODE_MASTER;
-    hspi1.Init.Direction = SPI_DIRECTION_2LINES;
+    // hspi1.Init.Direction = SPI_DIRECTION_2LINES;
-    hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
+    // hspi1.Init.DataSize = SPI_DATASIZE_16BIT;
-    hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
+    // hspi1.Init.CLKPolarity = SPI_POLARITY_HIGH;
-    hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
+    // hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
-    hspi1.Init.NSS = SPI_NSS_SOFT;
+    // hspi1.Init.NSS = SPI_NSS_SOFT;
-    hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
+    // hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
-    hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
+    // hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
-    hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
+    // hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
-    hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
+    // hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
-    hspi1.Init.CRCPolynomial = 10;
+    // hspi1.Init.CRCPolynomial = 10;
-    if (HAL_SPI_Init(&hspi1) != HAL_OK)
+    // if (HAL_SPI_Init(&hspi1) != HAL_OK)
-    {
+    // {
-        Error_Handler();
+    //     Error_Handler();
-    }
+    // }
+    MX_SPI1_Init();
     ADS1220_CS(GPIO_PIN_SET);
-    //DAC7811_CS(GPIO_PIN_SET);
+    DAC7811_CS(GPIO_PIN_RESET);
 }
 
 void fun_dac7811_operate(float32 *data_sv)
@@ -70,9 +71,9 @@ void fun_dac7811_operate(float32 *data_sv)
     }
     else
     {
-        //DAC7811_CS(GPIO_PIN_RESET);
+        DAC7811_CS(GPIO_PIN_RESET);
         HAL_SPI_Transmit(&hspi1, (uint8_t *)(&reg_data), 1, 1000);
-        //DAC7811_CS(GPIO_PIN_SET);
+        DAC7811_CS(GPIO_PIN_SET);
     }
 }
 

App/MUX_SIGNAL/mux_signal.c

@@ -280,7 +280,8 @@ void mux_signal_switch(st_mux_signal *mux_signal)
         break;
 
         case CH4_OUT_RES:
-            if(mux_set_flag) fun_dac7811_operate(&mux_signal->data_sv);         //设定
+            //if(mux_set_flag) fun_dac7811_operate(&mux_signal->data_sv);         //设定
+            fun_dac7811_operate(&mux_signal->data_sv);
         break;
 
         case CH5_EMPTY:

Core/Src/gpio.c

@@ -111,7 +111,7 @@ void MX_GPIO_Init(void)
   /*Configure GPIO pin : PtPin */
   GPIO_InitStruct.Pin = ADS1220_DRDY_Pin;
   GPIO_InitStruct.Mode = GPIO_MODE_INPUT;
-  GPIO_InitStruct.Pull = GPIO_NOPULL;
+  GPIO_InitStruct.Pull = GPIO_PULLUP;
   HAL_GPIO_Init(ADS1220_DRDY_GPIO_Port, &GPIO_InitStruct);
 
   /*Configure GPIO pin : PtPin */

MDK-ARM/signal_generator.uvoptx

@@ -285,16 +285,6 @@
           <WinNumber>1</WinNumber>
           <ItemText>data_1220</ItemText>
         </Ww>
-        <Ww>
-          <count>26</count>
-          <WinNumber>1</WinNumber>
-          <ItemText>ads1220spi_status_watch</ItemText>
-        </Ww>
-        <Ww>
-          <count>27</count>
-          <WinNumber>1</WinNumber>
-          <ItemText>RcvData</ItemText>
-        </Ww>
       </WatchWindow1>
       <WatchWindow2>
         <Ww>
@@ -317,7 +307,7 @@
       <DebugFlag>
         <trace>0</trace>
         <periodic>1</periodic>
-        <aLwin>0</aLwin>
+        <aLwin>1</aLwin>
         <aCover>0</aCover>
         <aSer1>0</aSer1>
         <aSer2>0</aSer2>

signal_generator.ioc

@@ -247,8 +247,9 @@ NVIC.USART2_IRQn=true\:5\:0\:false\:false\:true\:true\:true\:true\:true
 NVIC.USART3_IRQn=true\:5\:0\:false\:false\:true\:true\:true\:true\:true
 NVIC.USART6_IRQn=true\:5\:0\:false\:false\:true\:true\:true\:true\:true
 NVIC.UsageFault_IRQn=true\:0\:0\:false\:false\:true\:false\:false\:false\:false
-PA0-WKUP.GPIOParameters=GPIO_Label
+PA0-WKUP.GPIOParameters=GPIO_PuPd,GPIO_Label
 PA0-WKUP.GPIO_Label=ADS1220_DRDY
+PA0-WKUP.GPIO_PuPd=GPIO_PULLUP
 PA0-WKUP.Locked=true
 PA0-WKUP.Signal=GPIO_Input
 PA1.GPIOParameters=GPIO_Label