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153 lines
3.8 KiB
C
153 lines
3.8 KiB
C
#include "SWM221.h"
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#define LIN_ID_Sensor 0x11 // 此从机是一个传感器，只能从它读数据
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#define LIN_ID_Switch 0x21 // 此从机是一个开关， 只能向它写数据
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#define LIN_NB_Sensor 6 // Number of Byte, 传感器的数据是 6 字节
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#define LIN_NB_Switch 4
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uint8_t Buffer_Sensor[LIN_NB_Sensor] = { 0 };
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uint8_t Buffer_Switch[LIN_NB_Switch] = { 0x12, 0x34, 0x56, 0x78 };
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volatile uint32_t Index_Sensor = 0;
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volatile uint32_t Index_Switch = 0;
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volatile uint32_t NACK_Sensor = 0;
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void SerialInit(void);
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int main(void)
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{
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SystemInit();
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SerialInit();
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USART_InitStructure USART_initStruct;
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PORT_Init(PORTA, PIN2, PORTA_PIN2_USART0_TX, 0);
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PORT_Init(PORTA, PIN3, PORTA_PIN3_USART0_RX, 1);
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USART_initStruct.Baudrate = 9600;
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USART_initStruct.DataBits = USART_DATA_8BIT;
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USART_initStruct.Parity = USART_PARITY_NONE;
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USART_initStruct.StopBits = USART_STOP_1BIT;
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USART_initStruct.RXReadyIEn = 1;
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USART_initStruct.TXReadyIEn = 0;
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USART_initStruct.TimeoutIEn = 0;
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USART_Init(USART0, &USART_initStruct);
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USART_Open(USART0);
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USART_LINConfig(USART0, USART_LIN_MASTER, USART_CHECKSUM_LIN13, USART_IT_LIN_ID | USART_IT_LIN_DONE | USART_IT_LIN_NAKERR);
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while(1==1)
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{
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USART_LINStart(USART0, LIN_ID_Sensor, USART_LIN_SUBSCRIBE, LIN_NB_Sensor, USART_CHECKSUM_LIN13); // 从 Sensor 读数据
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NACK_Sensor = 0;
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Index_Sensor = 0;
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while(Index_Sensor < LIN_NB_Sensor)
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{
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if(NACK_Sensor)
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goto retry;
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}
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printf("Data from Sensor: ");
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for(int i = 0; i < LIN_NB_Sensor; i++)
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{
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printf("%02X, ", Buffer_Sensor[i]);
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}
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printf("\n\n");
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USART_LINStart(USART0, LIN_ID_Switch, USART_LIN_PUBLISH, LIN_NB_Switch, USART_CHECKSUM_LIN13); // 向 Switch 写数据
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retry:
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for(int i = 0; i < SystemCoreClock/2; i++) __NOP();
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}
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}
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void USART0_Handler(void)
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{
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if(USART_INTStat(USART0, USART_IT_LIN_ID)) // ID 已发送
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{
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if(((USART0->LINMR & USART_LINMR_NACT_Msk) >> USART_LINMR_NACT_Pos) == USART_LIN_PUBLISH)
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{
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USART_INTEn(USART0, USART_IT_TX_RDY);
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Index_Switch = 0;
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}
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else
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{
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Index_Sensor = 0;
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}
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}
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if(USART_INTStat(USART0, USART_IT_RX_RDY))
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{
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uint8_t chr = USART_Read(USART0);
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if(Index_Sensor < LIN_NB_Sensor)
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Buffer_Sensor[Index_Sensor++] = chr;
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}
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else if(USART_INTStat(USART0, USART_IT_RX_TO))
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{
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}
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if(USART_INTStat(USART0, USART_IT_TX_RDY))
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{
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USART_Write(USART0, Buffer_Switch[Index_Switch++]);
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if(Index_Switch == LIN_NB_Switch)
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USART_INTDis(USART0, USART_IT_TX_RDY);
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}
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if(USART_INTStat(USART0, USART_IT_LIN_DONE))
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{
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}
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if(USART_INTStat(USART0, USART_IT_LIN_NAKERR))
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{
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NACK_Sensor = 1;
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}
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USART_INTClr(USART0, USART_IT_RX_TO | USART_IT_LIN_ID | USART_IT_LIN_DONE | USART_IT_LIN_NAKERR);
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}
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void SerialInit(void)
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{
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UART_InitStructure UART_initStruct;
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PORT_Init(PORTA, PIN0, PORTA_PIN0_UART0_RX, 1); //GPIOA.0配置为UART0 RXD
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PORT_Init(PORTA, PIN1, PORTA_PIN1_UART0_TX, 0); //GPIOA.1配置为UART0 TXD
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UART_initStruct.Baudrate = 57600;
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UART_initStruct.DataBits = UART_DATA_8BIT;
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UART_initStruct.Parity = UART_PARITY_NONE;
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UART_initStruct.StopBits = UART_STOP_1BIT;
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UART_initStruct.RXThreshold = 3;
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UART_initStruct.RXThresholdIEn = 0;
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UART_initStruct.TXThreshold = 3;
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UART_initStruct.TXThresholdIEn = 0;
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UART_initStruct.TimeoutTime = 10;
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UART_initStruct.TimeoutIEn = 0;
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UART_Init(UART0, &UART_initStruct);
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UART_Open(UART0);
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}
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/******************************************************************************************************************************************
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* 函数名称: fputc()
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* 功能说明: printf()使用此函数完成实际的串口打印动作
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* 输 入: int ch 要打印的字符
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* FILE *f 文件句柄
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* 输 出: 无
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* 注意事项: 无
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******************************************************************************************************************************************/
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int fputc(int ch, FILE *f)
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{
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UART_WriteByte(UART0, ch);
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while(UART_IsTXBusy(UART0));
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return ch;
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}
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