CW32 Voltage and Current Meter

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Project Introduction (
Please fill in the basic introduction of the project here. Example:
This project is a voltage and current detection based on the SW32 microcontroller. Voltage and current are acquired and converted through two ADC channels respectively. The digital tube is a six-digit display, with the top three digits displaying the voltage value and the bottom three digits displaying the current value. A continuous acquisition mode can be used in the program. It also features a digital voltmeter and ammeter with calibration function.
Project Function
: Measures current and voltage.
Project Parameters:
COM1, COM2, and COM3 bit code pins. These three bit code pins control the on/off state of the three digital tubes respectively, and are active low.)
/ Common cathode seven-segment tube encoding table:
0x3f 0x06 0x5b 0x4f 0x66 0x6d 0x7d 0x07 0x7f 0x6f
0 1 2 3 4 5 6 7 8 9
0xbf 0x86 0xdb 0xcf 0xe6 0xed 0xfd 0x87 0xff 0xef
0. 1. 2. 3. 4. 5. 6. 7. 8. 9. /
//0x3f, 0011 1111; 0x5b 0101 1011
uint8_t Seg_Table[20] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f,
0xbf, 0x86, 0xdb, 0xcf, 0xe6, 0xed, 0xfd, 0x87, 0xff, 0xef};
void Seg_Configuration(void) //Find the schematic and initialize the relevant pins of the digital tube
{
__RCC_GPIOA_CLK_ENABLE(); //Turn on the clock of GPIOA
__RCC_GPIOB_CLK_ENABLE(); //Turn on the clock of GPIOB
GPIO_InitTypeDef GPIO_InitStruct;
GPIO_InitStruct.Pins = GPIO_PIN_2 | GPIO_PIN_0 | GPIO_PIN_4 | GPIO_PIN_6 | GPIO_PIN_7 | GPIO_PIN_1 | GPIO_PIN_3 | GPIO_PIN_5 | GPIO_PIN_8 | GPIO_PIN_11 | GPIO_PIN_12 | GPIO_PIN_15;
//A:PA02;B:PA00;C:PA04;D:PA06;E:PA07;F:PA01;G:PA03;DP:PA05;
//COM1:PA08;COM2:PA11;COM3:PA12;COM4:PA15;COM5:PB03;COM6:PB04;
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.IT = GPIO_IT_NONE;
GPIO_InitStruct.Speed ​​= GPIO_SPEED_HIGH;
GPIO_Init(CW_GPIOA, &GPIO_InitStruct);
GPIO_InitStruct.Pins = GPIO_PIN_3 | GPIO_PIN_4; //COM5:PB03;COM6:PB04
GPIO_InitStruct.Mode = GPIO_MODE_OUTPUT_PP;
GPIO_InitStruct.IT = GPIO_IT_NONE;
GPIO_InitStruct.Speed ​​= GPIO_SPEED_HIGH;
GPIO_Init(CW_GPIOB, &GPIO_InitStruct);
}oid Seg_Dis(uint8_t Pos,uint8_t Num)
{
//The voltmeter and ammeter have two digital tubes. We will use the upper tube in this case, so the lower digital tube is turned off.
GPIO_WritePin(CW_GPIOA,GPIO_PIN_15,GPIO_Pin_SET); //PA15,COM4
GPIO_WritePin(CW_GPIOB,GPIO_PIN_3,GPIO_Pin_SET); //PB03,COM5
GPIO_WritePin(CW_GPIOB,GPIO_PIN_4,GPIO_Pin_SET); //PB04,COM6
int i;
uint8_t Dis_Value = Seg_Table[Num];
for(i = 0; i < 8; i++)
{
switch(i)
{
case 0:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_2,(Dis_Value >> i) & 0x01); //PA02,A
break;
case 1:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_0,(Dis_Value >> i) & 0x01); //PA00,B
break;
case 2:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_4,(Dis_Value >> i) & 0x01); //PA04,C
break;
case 3:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_6,(Dis_Value >> i) & 0x01); //PA06,D
break;
case 4:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_7,(Dis_Value >> i) & 0x01); //PA07,E
break;
case 5:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_1,(Dis_Value >> i) & 0x01); //PA01,F
break;
case 6:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_3,(Dis_Value >> i) & 0x01); //PA03,G
break;
case 7:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_5,(Dis_Value >> i) & 0x01); //PA05,DP
break;
default:
break;
}
}
switch(Pos)
{
case 1:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_8,GPIO_Pin_RESET); //PA08,COM1
GPIO_WritePin(CW_GPIOA,GPIO_PIN_11,GPIO_Pin_SET); //PA11,COM2
GPIO_WritePin(CW_GPIOA,GPIO_PIN_12,GPIO_Pin_SET); //PA12,COM3
break;
case 2:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_8,GPIO_Pin_SET); //PA08,COM1
GPIO_WritePin(CW_GPIOA,GPIO_PIN_11,GPIO_Pin_RESET); //PA11,COM2
GPIO_WritePin(CW_GPIOA,GPIO_PIN_12,GPIO_Pin_SET); //PA12,COM3
break;
case 3:
GPIO_WritePin(CW_GPIOA,GPIO_PIN_8,GPIO_Pin_SET); //PA08,COM1
GPIO_WritePin(CW_GPIOA,GPIO_PIN_11,GPIO_Pin_SET); //PA11,COM2
GPIO_WritePin(CW_GPIOA,GPIO_PIN_12,GPIO_Pin_RESET); //PA12,COM3
break;
default:
break;
}
}）
Principle Analysis (Hardware Description)
Notes:
This section can be used to fill in key points or common mistakes during design and manufacturing. Example:

Note the orientation and spacing of the SW32 module.
Note the 8533 components;
the grounding path should be the 8550 power supply location .

Assembly Process :
Soldering: Note the polarity of the plug-in capacitors;
solder them in order of height, starting with the highest components.
Actual product image