4~20mA电流信号是各类工业仪表和测试设备最常用的信号之一，针对AD5422类高精度4-20mA输出芯片无国产替代芯片的现状，为摆脱对国外芯片的依赖，研制了一套全国产化便携式高精度4~20mA电流信号源，精度可达0.1%，以32位互联型RISC-V MCU CH32V307为主控芯片，控制电压型DA输出电压信号，利用电压信号控制以运放和三极管及高精度电阻为主组成的压控电流源电路，输出高精度的4-20mA信号，为各类工业仪表测试结果输出和测试仪器设备的国产化替代提供支撑。
同时为了适应单独使用需求和增加可扩展及远程控制能力，开发了本地屏幕控制及远程Uart控制和CAN总线控制。
  
u_int16_t I2C1_CYDL(){ //I2C1 可用//
u_int16_t I2C1_CYDL_Value; while(I2C_GetFlagStatus(I2C1, I2C_FLAG_BUSY) != RESET) ; I2C_GenerateSTART(I2C1, ENABLE);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_MODE_SELECT)) ; I2C_Send7bitAddress(I2C1, 0X90, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C1, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) ; while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C1, ENABLE);//是否连续 RX_T1 = I2C_ReceiveData(I2C1);//接收第1个字节 高8位 while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C1, ENABLE);//是否连续 RX_T2 = I2C_ReceiveData(I2C1);//接收第2个字节 低8位 while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C1, ENABLE);//是否连续 RX_T3 = I2C_ReceiveData(I2C1);//接收第3个字节 控制字 while(I2C_GetFlagStatus(I2C1, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C1, DISABLE);//是否连续 I2C_GenerateSTOP(I2C1, ENABLE);
pxbuf[1] = RX_T1; pxbuf[2] = RX_T2; pxbuf[3] = RX_T3;
I2C1_CYDL_Value = (RX_T1 << 8) + RX_T2; //高字节在前,合成16位 I2C1_CYDL_Value = (I2C1_CYDL_Value*20480)>>15;// 将单位转换为uA ，统一以uA做计算 // I2C1_CYDL_Value = (I2C1_CYDL_Value*0.9946-39.55 + 80); // if (I2C1_CYDL_Value < 1 ) { // I2C1_CYDL_Value = 1; // } // else if (I2C1_CYDL_Value >65534) { // I2C1_CYDL_Value = 65534; // } // 采样电流 屏幕显示值 sprintf(num2str_temp,"DLCL.n0.val=%d",I2C1_CYDL_Value); //page DLCL n0对象 val参数显示 // printf(num2str_temp); // printf("\r\n"); uart8_send_string(num2str_temp); USART_SendData(UART8, 0xFF); Delay_Us(100); USART_SendData(UART8, 0xFF); Delay_Us(100); USART_SendData(UART8, 0xFF);
return I2C1_CYDL_Value;
}
int16_t I2C2_HCDL(){ //I2C2 可用//
int16_t I2C2_HCDL_Value;
while(I2C_GetFlagStatus(I2C2, I2C_FLAG_BUSY) != RESET) ; I2C_GenerateSTART(I2C2, ENABLE);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_MODE_SELECT)) ; I2C_Send7bitAddress(I2C2, 0X90, I2C_Direction_Receiver);
while(!I2C_CheckEvent(I2C2, I2C_EVENT_MASTER_RECEIVER_MODE_SELECTED)) ; while(I2C_GetFlagStatus(I2C2, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C2, ENABLE);//是否连续 RX_T1 = I2C_ReceiveData(I2C2);//接收第1个字节 高8位 while(I2C_GetFlagStatus(I2C2, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C2, ENABLE);//是否连续 RX_T2 = I2C_ReceiveData(I2C2);//接收第2个字节 低8位 while(I2C_GetFlagStatus(I2C2, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C2, ENABLE);//是否连续 RX_T3 = I2C_ReceiveData(I2C2);//接收第3个字节 控制字 while(I2C_GetFlagStatus(I2C2, I2C_FLAG_RXNE) == RESET) I2C_AcknowledgeConfig(I2C2, DISABLE);//是否连续 I2C_GenerateSTOP(I2C2, ENABLE);
// pxbuf[4] = RX_T1; // pxbuf[5] = RX_T2; pxbuf[6] = RX_T3;
// USART_SendData(USART1, 0x01); // Delay_Us(100); // USART_SendData(USART1, RX_T1); // Delay_Us(100); // USART_SendData(USART1, 0x02); // Delay_Us(100); // USART_SendData(USART1, RX_T2); // Delay_Us(100);
I2C2_HCDL_Value = (RX_T1 << 8) + RX_T2;//高字节在前,合成16位
// 回采电流 屏幕显示值 //page DLSC n1对象 val参数显示 2.048V*10000将单位转换为uA,>>15为除以32768 I2C2_HCDL_Value = (I2C2_HCDL_Value*20480)>>15;// 将单位转换为uA ，统一以uA做计算 I2C2_HCDL_Value = (I2C2_HCDL_Value*0.9946-39.55 + 80); if (I2C2_HCDL_Value < 1 ) { I2C2_HCDL_Value = 1; } else if (I2C2_HCDL_Value >65534) { I2C2_HCDL_Value = 65534; } pxbuf[4] = I2C2_HCDL_Value >> 8; pxbuf[5] = I2C2_HCDL_Value & 0x00ff; sprintf(num2str_temp,"DLSC.n1.val=%d",I2C2_HCDL_Value); uart8_send_string(num2str_temp); USART_SendData(UART8, 0xFF); Delay_Us(100); USART_SendData(UART8, 0xFF); Delay_Us(100); USART_SendData(UART8, 0xFF); sprintf(num2str_temp,"DLSC.n1.val=%d",I2C2_HCDL_Value); printf(num2str_temp); printf("\r\n"); return I2C2_HCDL_Value;
}
u8 SPI1_DYSC(u_int16_t SPI1_5541_DYSC){ //SPI 可用 设置初始输出电压 0x672A:1.000V 0x3395:0.500V 0x528:0.05V sprintf(num2str_temp,"DYSC.val=%d",SPI1_5541_DYSC); printf(num2str_temp); printf("\r\n"); if(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_TXE) != RESET){ GPIO_WriteBit(GPIOA, GPIO_Pin_4,0); SPI_I2S_SendData(SPI1, SPI1_5541_DYSC); Delay_Us(14); GPIO_WriteBit(GPIOA, GPIO_Pin_4,1); return 0; } else { return 1; } }
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