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294 lines
8.5 KiB
294 lines
8.5 KiB
#include "bsp_i2c_soft.h"
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#include "elog.h"
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// #include "delay.h"
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void IIC_Init(const IIC_SOFT_TypeDef *pSoftIIC )
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{
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GPIO_InitTypeDef GPIO_Initure;
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__HAL_RCC_GPIOB_CLK_ENABLE(); // 使能GPIOB时钟
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//PB6 SCL PB7初始化设置
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GPIO_Initure.Pin = pSoftIIC->scl_pin ;
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GPIO_Initure.Mode = GPIO_MODE_OUTPUT_PP; // 推挽输出
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GPIO_Initure.Pull = GPIO_PULLUP; // 上拉
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GPIO_Initure.Speed = GPIO_SPEED_FAST; // 快速
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HAL_GPIO_Init( pSoftIIC->scl_port, &GPIO_Initure );
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// SDA PB7 初始化设置
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GPIO_Initure.Pin = pSoftIIC->sda_pin;
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HAL_GPIO_Init( pSoftIIC->sda_port, &GPIO_Initure );
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 1);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);
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}
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int IIC_READ_SDA_Pin(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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return HAL_GPIO_ReadPin(pSoftIIC->sda_port,pSoftIIC->sda_pin);
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}
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int IIC_SDA_Mode_In(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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// 取针脚号 pin6 的值为 2^6
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// GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 1);
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pSoftIIC->sda_port->MODER&=~(3<<(pSoftIIC->sda_pin_num*2));
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pSoftIIC->sda_port->MODER|=0<<pSoftIIC->sda_pin_num*2;
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}
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int IIC_SDA_Mode_Out(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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// GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 1);
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pSoftIIC->sda_port->MODER&=~(3<<(pSoftIIC->sda_pin_num*2));
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pSoftIIC->sda_port->MODER|=1<<pSoftIIC->sda_pin_num*2;
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}
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//产生IIC起始信号
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void IIC_Start(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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// SDA_OUT();//sda线输出
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IIC_SDA_Mode_Out( pSoftIIC); //sda线输出
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 1);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);
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delay_us(4);
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 0); //START:when CLK is high,DATA change form high to low
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delay_us(4);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);//钳住I2C总线，准备发送或接收数据
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}
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//产生IIC停止信号
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void IIC_Stop(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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// SDA_OUT();//sda线输出
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IIC_SDA_Mode_Out( pSoftIIC); //sda线输出
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 0);//STOP:when CLK is high DATA change form low to high
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delay_us(4);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 1);//发送I2C总线结束信号
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delay_us(4);
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}
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//等待应答信号到来
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//返回值：1，接收应答失败
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// 0，接收应答成功
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int IIC_Wait_Ack(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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uint8_t ucErrTime=0;
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// SDA_IN(); //SDA设置为输入
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IIC_SDA_Mode_In( pSoftIIC); //SDA设置为输入
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 1);delay_us(1);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);delay_us(1);
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while(IIC_READ_SDA_Pin(pSoftIIC))
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// while( READ_SDA() )
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{
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ucErrTime++;
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if(ucErrTime>250)
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{
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IIC_Stop(pSoftIIC);
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return 1;
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}
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}
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);//时钟输出0
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return 0;
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}
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//产生ACK应答
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void IIC_Ack(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);
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// SDA_OUT();//sda线输出
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IIC_SDA_Mode_Out( pSoftIIC); //sda线输出
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 0);
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delay_us(2);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);
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delay_us(2);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);
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}
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//不产生ACK应答
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void IIC_NAck(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);
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// SDA_OUT();//sda线输出
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IIC_SDA_Mode_Out( pSoftIIC); //sda线输出
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, 1);
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delay_us(2);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);
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delay_us(2);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);
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}
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//IIC发送一个字节
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//返回从机有无应答
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//1，有应答
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//0，无应答
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int IIC_Send_Byte(const IIC_SOFT_TypeDef *pSoftIIC, uint8_t txd)
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{
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uint8_t t;
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// SDA_OUT();//sda线输出
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IIC_SDA_Mode_Out( pSoftIIC); //sda线输出
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);//拉低时钟开始数据传输
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for(t=0;t<8;t++)
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{
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// IIC_SDA=(txd&0x80)>>7;
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// IIC_SDA( (txd&0x80)>>7);
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GPIO_WRITE_PIN(pSoftIIC->sda_port, pSoftIIC->sda_pin, (txd&0x80)>>7 );
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txd<<=1;
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delay_us(2);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);
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delay_us(2);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);
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delay_us(2);
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}
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return 0;
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}
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int IIC_Read_Byte( const IIC_SOFT_TypeDef *pSoftIIC)
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{
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unsigned char i,receive=0;
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// SDA_IN(); //SDA设置为输入
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IIC_SDA_Mode_In( pSoftIIC); //SDA设置为输入
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for(i=0;i<8;i++ )
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{
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 0);
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delay_us(2);
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GPIO_WRITE_PIN(pSoftIIC->scl_port, pSoftIIC->scl_pin, 1);
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receive<<=1;
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if(IIC_READ_SDA_Pin(pSoftIIC))receive++;
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// if( READ_SDA() )receive++;
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delay_us(1);
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}
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return receive;
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}
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// 发送Slave_Addr 带应答， 兼容7bit 10bit
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int IIC_Send_Slave_Addr(const IIC_SOFT_TypeDef *pSoftIIC,uint8_t r_w)
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{
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if( pSoftIIC->slave_address_width == I2C_SW_Slave_Address_7Bit )
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{
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log_i("salve adrr %02X %02X",pSoftIIC->addr, (pSoftIIC->addr << 1)|r_w);
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IIC_Send_Byte(pSoftIIC, (pSoftIIC->addr << 1) | r_w);
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if(IIC_Wait_Ack(pSoftIIC)) { IIC_Stop(pSoftIIC); return -1;};
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}
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else if( pSoftIIC->slave_address_width == I2C_SW_Slave_Address_10Bit )
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{
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uint8_t h_addr = 0x0F00 | ((pSoftIIC->addr >> 8 & 0x03) << 2) | r_w;
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IIC_Send_Byte(pSoftIIC, h_addr);
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if(IIC_Wait_Ack(pSoftIIC)) { IIC_Stop(pSoftIIC); return -1;};
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uint8_t l_addr = pSoftIIC->addr & 0xff;
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IIC_Send_Byte(pSoftIIC, l_addr);
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if(IIC_Wait_Ack(pSoftIIC)) { IIC_Stop(pSoftIIC); return -1;};
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}
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return 0;
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}
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// 发送reg_addr 带应答， 兼容8bit 16bit 32bit
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int IIC_Send_Reg_Addr( const IIC_SOFT_TypeDef *pSoftIIC, uint32_t reg_addr )
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{
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for(int j = 0; j < pSoftIIC->slave_reg_addr_width; j++)
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{
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uint8_t offset = (pSoftIIC->slave_reg_addr_width - 1 - j) * 8;
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uint8_t temp_reg_addr = (reg_addr >> offset) & 0xff;
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IIC_Send_Byte(pSoftIIC, temp_reg_addr);
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if(IIC_Wait_Ack(pSoftIIC)) { IIC_Stop(pSoftIIC); return -1;};
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}
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return 0;
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}
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int IIC_Send_One_Reg_Value( const IIC_SOFT_TypeDef *pSoftIIC, uint32_t reg_val )
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{
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for(int k = 0; k < pSoftIIC->slave_reg_value_width; k++)
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{
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uint8_t offset = (pSoftIIC->slave_reg_value_width - 1 - k) * 8;
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i2c_send_byte(pSoftIIC, (reg_val >> offset) & 0xff);
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if(!i2c_wait_ack(pSoftIIC))
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return false;
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}
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return 0;
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}
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int IIC_Send_Receive_One_Reg_Value( const IIC_SOFT_TypeDef *pSoftIIC, uint32_t* reg_val, uint8_t ack )
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{
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for(int k = 0; k < pSoftIIC->slave_reg_value_width; k++)
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{
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uint8_t offset = (pSoftIIC->slave_reg_value_width - 1 - k) * 8;
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*reg_val |= (IIC_Read_Byte(pSoftIIC) << offset);
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if(ack)
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i2c_ack(pSoftIIC);
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else
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i2c_no_ack(pSoftIIC);
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}
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return 0;
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}
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int IIC_Write_Buf(const IIC_SOFT_TypeDef *pSoftIIC , uint32_t reg_addr, uint8_t *buf, uint8_t len)
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{
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IIC_Start(pSoftIIC);
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IIC_Send_Slave_Addr( pSoftIIC,I2C_WRITE );
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IIC_Send_Reg_Addr( pSoftIIC, reg_addr );
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for (size_t i = 0; i < len; i++)
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{
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IIC_Send_Byte(pSoftIIC,*buf);
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if(IIC_Wait_Ack(pSoftIIC)) { IIC_Stop(pSoftIIC); return -1;};
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}
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IIC_Stop(pSoftIIC);//产生一个停止条件
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// HAL_Delay( 200 );
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// delay_us(6000);
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return 0;
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}
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// 寄存器地址 8位置
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int IIC_Read_Buf(const IIC_SOFT_TypeDef *pSoftIIC, uint32_t reg_addr, uint8_t *buf, uint8_t len)
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{
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uint8_t temp=0;
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IIC_Start(pSoftIIC);
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IIC_Send_Slave_Addr( pSoftIIC,I2C_WRITE );
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IIC_Send_Reg_Addr( pSoftIIC, reg_addr );
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IIC_Start(pSoftIIC);
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IIC_Send_Slave_Addr( pSoftIIC,I2C_READ );
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for(int i=0; i<len-1; i++)
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{
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*buf=IIC_Read_Byte(pSoftIIC);
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IIC_Ack(pSoftIIC); // 应答
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buf++;
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}
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*buf = IIC_Read_Byte(pSoftIIC);// 读非应答
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IIC_NAck(pSoftIIC);
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// if(IIC_Wait_Ack()) { IIC_Stop(); return -1;};
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IIC_Stop(pSoftIIC);
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return 0;
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}
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int IIC_Device_Check(const IIC_SOFT_TypeDef *pSoftIIC)
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{
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uint8_t ret = 0;
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IIC_Start(pSoftIIC);
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ret = IIC_Send_Slave_Addr( pSoftIIC,I2C_WRITE );
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IIC_Stop(pSoftIIC);
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return ret;
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} |