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160 lines
3.6 KiB
C
160 lines
3.6 KiB
C
#include "SWM221.h"
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#define SLV_ADDR 0x50
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#define MEM_ADDR 0x10
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char txbuff[4] = {0x37, 0x55, 0xAA, 0x78};
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char rxbuff[4] = {0};
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void SerialInit(void);
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void I2CMstInit(void);
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int main(void)
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{
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uint32_t i;
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uint8_t ack;
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SystemInit();
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SerialInit();
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I2CMstInit();
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while(1==1)
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{
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/*************** EEPROM Write ***************/
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ack = I2C_Start(I2C0, (SLV_ADDR << 1) | 0, 1);
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if(ack == 0)
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{
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printf("Slave send NACK for address\r\n");
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goto nextloop;
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}
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ack = I2C_Write(I2C0, MEM_ADDR, 1);
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if(ack == 0)
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{
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printf("Slave send NACK for memory address\r\n");
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goto nextloop;
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}
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for(i = 0; i < 4; i++)
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{
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ack = I2C_Write(I2C0, txbuff[i], 1);
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if(ack == 0)
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{
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printf("Slave send NACK for data\r\n");
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goto nextloop;
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}
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}
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I2C_Stop(I2C0, 1);
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printf("Master Write %X %X %X %X @ %X\r\n", txbuff[0], txbuff[1], txbuff[2], txbuff[3], MEM_ADDR);
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for(i = 0; i < 1000000; i++) __NOP(); // 延时等待内部写入操作完成
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/*************** EEPROM Read ***************/
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ack = I2C_Start(I2C0, (SLV_ADDR << 1) | 0, 1);
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if(ack == 0)
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{
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printf("Slave send NACK for address\r\n");
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goto nextloop;
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}
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ack = I2C_Write(I2C0, MEM_ADDR, 1);
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if(ack == 0)
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{
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printf("Slave send NACK for memory address\r\n");
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goto nextloop;
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}
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ack = I2C_Start(I2C0, (SLV_ADDR << 1) | 1, 1);
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if(ack == 0)
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{
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printf("Slave send NACK for address\r\n");
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goto nextloop;
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}
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for(i = 0; i < 3; i++)
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{
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rxbuff[i] = I2C_Read(I2C0, 1, 1);
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}
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rxbuff[i] = I2C_Read(I2C0, 0, 1);
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printf("Master Read %X %X %X %X @ %X\r\n", rxbuff[0], rxbuff[1], rxbuff[2], rxbuff[3], MEM_ADDR);
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if((txbuff[0] == rxbuff[0]) && (txbuff[1] == rxbuff[1]) && (txbuff[2] == rxbuff[2]) && (txbuff[3] == rxbuff[3]))
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printf("Success\r\n");
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else
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printf("Fail\r\n");
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nextloop:
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I2C_Stop(I2C0, 1);
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for(i = 0; i < SystemCoreClock/4; i++) ;
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}
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}
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void I2CMstInit(void)
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{
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I2C_InitStructure I2C_initStruct;
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PORT_Init(PORTA, PIN6, PORTA_PIN6_I2C0_SCL, 1); //GPIOA.6配置为I2C0 SCL引脚
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PORTA->OPEND |= (1 << PIN6); //开漏输出
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PORTA->PULLU |= (1 << PIN6); //使能上拉
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PORT_Init(PORTA, PIN7, PORTA_PIN7_I2C0_SDA, 1); //GPIOA.7配置为I2C0 SDA引脚
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PORTA->OPEND |= (1 << PIN7); //开漏输出
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PORTA->PULLU |= (1 << PIN7); //使能上拉
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I2C_initStruct.Master = 1;
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I2C_initStruct.MstClk = 100000;
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I2C_initStruct.Addr10b = 0;
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I2C_initStruct.TXEmptyIEn = 0;
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I2C_initStruct.RXNotEmptyIEn = 0;
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I2C_Init(I2C0, &I2C_initStruct);
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I2C_Open(I2C0);
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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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