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148 lines
3.6 KiB
C
148 lines
3.6 KiB
C
#include "SWM221.h"
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#include <string.h>
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#include "IOI2C_MST.h"
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#define SLV_ADDR 0x6C
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char mst_txbuff[4] = {0x37, 0x55, 0xAA, 0x78};
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char mst_rxbuff[4] = {0};
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char slv_rxbuff[5] = {0}; //第一个数据是地址
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char slv_txbuff[4] = {0};
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volatile uint32_t slv_rxindx = 0;
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volatile uint32_t slv_txindx = 0;
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void SerialInit(void);
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void I2C_Slv_Init(void);
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int main(void)
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{
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uint32_t i;
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SystemInit();
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SerialInit();
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IOI2C_MST_Init(100000);
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I2C_Slv_Init();
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while(1==1)
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{
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IOI2C_MST_Send(SLV_ADDR, mst_txbuff, 4);
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while(IOI2C_MST_IsBusy());
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printf("Master Send %X %X %X %X\r\n", mst_txbuff[0], mst_txbuff[1], mst_txbuff[2], mst_txbuff[3]);
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IOI2C_MST_Read(SLV_ADDR, mst_rxbuff, 4);
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while(IOI2C_MST_IsBusy());
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printf("Master Read %X %X %X %X\r\n", mst_rxbuff[0], mst_rxbuff[1], mst_rxbuff[2], mst_rxbuff[3]);
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if((mst_txbuff[0] == mst_rxbuff[0]) && (mst_txbuff[1] == mst_rxbuff[1]) && (mst_txbuff[2] == mst_rxbuff[2]) && (mst_txbuff[3] == mst_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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for(i = 0; i < SystemCoreClock/10; i++) __NOP();
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}
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}
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void I2C_Slv_Init(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 = 0;
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I2C_initStruct.MstClk = 0;
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I2C_initStruct.Addr10b = 0;
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I2C_initStruct.SlvAddr = SLV_ADDR;
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I2C_initStruct.TXEmptyIEn = 1;
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I2C_initStruct.RXNotEmptyIEn = 1;
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I2C_initStruct.SlvSTADetIEn = 1;
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I2C_initStruct.SlvSTODetIEn = 1;
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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 I2C0_Handler(void)
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{
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uint32_t i;
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if(I2C0->IF & I2C_IF_RXSTA_Msk) //收到起始位
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{
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I2C0->IF = (1 << I2C_IF_RXSTA_Pos);
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slv_rxindx = 0;
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I2C0->TR = (1 << I2C_TR_TXCLR_Pos); //有数据时无法写入
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I2C0->TXDATA = slv_txbuff[0];
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slv_txindx = 1;
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}
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else if(I2C0->IF & I2C_IF_RXNE_Msk) //接收寄存器非空
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{
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slv_rxbuff[slv_rxindx] = I2C0->RXDATA;
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if(slv_rxindx < 4) slv_rxindx++;
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}
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else if(I2C0->IF & I2C_IF_TXE_Msk) //发送寄存器空
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{
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I2C0->TXDATA = slv_txbuff[slv_txindx];
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if(slv_txindx < 3) slv_txindx++;
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}
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else if(I2C0->IF & I2C_IF_RXSTO_Msk) //收到停止位
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{
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I2C0->IF = (1 << I2C_IF_RXSTO_Pos);
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for(i = 0; i < 4; i++) slv_txbuff[i] = slv_rxbuff[1+i];
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}
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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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