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hpw422移植新的sdk

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xushaoxiang
2026-07-03 18:08:25 +08:00
commit 945a5a5b0b
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component/boot2/bsp/bsp_i2c_slave.c
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#include "Includes.h"
#if 1
/* ---------------------------------------------------------------------------------------------------
- 函数名称: i2c_master_StatusCheck
- 函数功能: 状态检测
- 输入参数: 第几bit; 对应bit上的值
- 创建日期:
----------------------------------------------------------------------------------------------------*/
static void i2c_master_StatusCheck(uint8_t nbit, uint8_t bitval)
{
uint8_t val;
for(; ;) {
__read_hw_reg32(I2C_STATUS , val);
if( bitval == ((val>>nbit)&0x01) ) break;
}
}
/* ---------------------------------------------------------------------------------------------------
- 函数名称: i2c_slave_init
- 函数功能: 初始化i2c SLAVE模式
- 输入参数: i2c器件地址
- 创建日期:
----------------------------------------------------------------------------------------------------*/
extern void i2c_slave_init(uint16_t i2cAddR)
{
__write_hw_reg32(CPR_CTLAPBCLKEN_GRCTL, 0x8000800);
__write_hw_reg32(CPR_RSTCTL_SUBRST_SW, 0x400000);
__write_hw_reg32(CPR_RSTCTL_SUBRST_SW, 0x400040);
__write_hw_reg32(CPR_I2C_CLK_CTL, 0x110011); //-> i2c_mclk = 16mhz.
i2c_master_StatusCheck(0, 0);
__write_hw_reg32(I2C_ENABLE, 0x00);
__write_hw_reg32(I2C_SAR, i2cAddR);
__write_hw_reg32(I2C_RX_TL, 0x00);
__write_hw_reg32(I2C_TX_TL, 0x00);
__write_hw_reg32(I2C_CON, 0x00);
__write_hw_reg32(I2C_INTR_EN, (I2C_SLAVE_RX_DONE | I2C_SLAVE_RD_REQ | I2C_SLAVE_RX_FULL | I2C_SLAVE_STOP ));
__write_hw_reg32(I2C_FS_SCL_HCNT, 12);
__write_hw_reg32(I2C_FS_SCL_LCNT, 19);
__write_hw_reg32(I2C_SS_SCL_HCNT, 72);
__write_hw_reg32(I2C_SS_SCL_LCNT, 79);
i2c_master_StatusCheck(0, 0);
__write_hw_reg32(I2C_ENABLE, 0x1);
NVIC_EnableIRQ(I2C_IRQn);
}
#define SELVE_ADDRESS 0xA0
/* ---------------------------------------------------------------------------------------------------
- 函数名称: I2C_Handler
- 函数功能: I2C中断处理函数
- 输入参数: 无
- 创建日期:
----------------------------------------------------------------------------------------------------*/
extern void I2C_Handler(void)
{
uint32_t stat, VAL;
__read_hw_reg32(I2C_INTR_STAT, stat);
printf("stat=%#x =>",stat); //if(stat == 0) return; //if(stat & 0x200) __read_hw_reg32(I2C_CLR_STOP_DET, VAL);//-读 此 寄 存 器 清 除 中 断STOP_DET //if(stat & 0x40) __read_hw_reg32(I2C_CLR_TX_ABRT, VAL); //- 读此寄存器清除中断 TX_ABRT
__read_hw_reg32(I2C_CLR_INTR, VAL);//- 清除中断 读此寄存器清除组合中断，各个独立中断以及I2C_TX_ABRT_SOURCE 寄存器
if(stat & 0x80)//RX_DONE-作为 slave 发送数据时，如果master 没有响应的话，在发送最后一个字节后产生此中断，表示发送结束
{
printf("RX_DONE--%#x\n",*(I2C_DATA_CMD));
}
if(stat & 0x200)//IIC 停止信号 --STOP_DET 结束条件标志 1：总线出现结束条件 0：无效
{
printf("STOP_DET--%#x\n",*(I2C_DATA_CMD));
}
if(stat & 0x4) //从站收到主站的发送的寄存器地址 (并应答主机的读或写的请求)--RX_FULL RX FIFO 满标志 1：RX FIFO 数据大于或者等于 RX FIFO 阈值。此比特随 FIFO状态自动更新 0：无效
{
uint8_t val= *(I2C_DATA_CMD);
if(val==(1)) //寄存器地址
{
*(I2C_DATA_CMD)=0xCC;
}else if(val==0x02) //寄存器地址
{
printf("*****write - %#2x\n",*(I2C_DATA_CMD));
}
else
{
}
printf("RX_FULL--%#2x\n",val);
}
if(stat & 0x20) //RD_REQ //从站收到主站的再次读请求中断，
{ //作为 slave，当另外一个 master尝试从 slave 读数据时产生此中断。Slave 保持 I2C 总线为等待状态（SCL=0）直到中断服务被响应。
//这表示 slave 被远端的master 寻址，并且要求其发送数据。处理器必须响应这个中断，并 将 待 发 送 的 数 据 写 入I2C_DATA_CMD 寄存器
static uint8_t count=1;
*(I2C_DATA_CMD)=count;
printf("RD_REQ--%#x\n",count++);
}
}
void test_slave_i2c()
{
//IIC 主机命令1 是读，0是写 空闲状态下IIC 的SCL SDA都为高电平 等待时擎住SCL线到低电平
gpio_mux_ctl(4,0);gpio_fun_inter(4,0);gpio_fun_sel(4,6);//sda 6:I2C_SDA
gpio_mux_ctl(5,0);gpio_fun_inter(5,0);gpio_fun_sel(5,5);//scl 5:I2C_SCL
//i2c_slave_init(0x3D);//IIC上位机侦测的IIC从机地址为0x7A(等于0x3D<<1)
i2c_slave_init((SELVE_ADDRESS>>1));
while(1);
}
#else
i2cHandler_callback_t i2cHandler_Callback = (i2cHandler_callback_t)0;
/* ---------------------------------------------------------------------------------------------------
- 函数名称: i2c_slave_init
- 函数功能: 初始化i2c SLAVE模式
- 输入参数: i2c器件地址
- 创建日期:
----------------------------------------------------------------------------------------------------*/
extern void i2c_slave_init(uint16_t i2cAddR)
{
__write_hw_reg32(CPR_CTLAPBCLKEN_GRCTL, 0x8000800);
__write_hw_reg32(CPR_RSTCTL_SUBRST_SW, 0x400000);
__write_hw_reg32(CPR_RSTCTL_SUBRST_SW, 0x400040);
__write_hw_reg32(CPR_I2C_CLK_CTL, 0x110011); //-> i2c_mclk = 16mhz.
__write_hw_reg32(I2C_ENABLE, 0x00);
__write_hw_reg32(I2C_SAR, i2cAddR);
__write_hw_reg32(I2C_RX_TL, 0x00);
__write_hw_reg32(I2C_TX_TL, 0x00);
__write_hw_reg32(I2C_CON, 0x00);
__write_hw_reg32(I2C_INTR_EN, (I2C_SLAVE_RX_DONE | I2C_SLAVE_RD_REQ | I2C_SLAVE_RX_FULL | I2C_SLAVE_STOP ));
__write_hw_reg32(I2C_ENABLE, 0x1);
NVIC_EnableIRQ(I2C_IRQn);
}
/* ---------------------------------------------------------------------------------------------------
- 函数名称: i2c_slave_Register_Callback
- 函数功能: 为i2c从设备注册中断回调函数
- 输入参数: 中断状态值
- 创建日期:
----------------------------------------------------------------------------------------------------*/
extern void i2c_slave_Register_Callback(i2cHandler_callback_t callback)
{
i2cHandler_Callback = callback;
}
/* ---------------------------------------------------------------------------------------------------
- 函数名称: i2c_slave_WriteSingle
- 函数功能: 为i2c从设备发送数据
- 输入参数: 发送的数据
- 创建日期:
----------------------------------------------------------------------------------------------------*/
extern void i2c_slave_WriteSingle(uint8_t val)
{
__write_hw_reg32(I2C_DATA_CMD, val);
}
/* ---------------------------------------------------------------------------------------------------
- 函数名称: i2c_slave_ReadSingle
- 函数功能: 为i2c从设备获取数据
- 输入参数: 无
- 创建日期:
----------------------------------------------------------------------------------------------------*/
extern uint8_t i2c_slave_ReadSingle(void)
{
uint8_t val;
__read_hw_reg32(I2C_DATA_CMD, val);
return (val);
}
/* ---------------------------------------------------------------------------------------------------
- 函数名称: I2C_Handler
- 函数功能: I2C中断处理函数
- 输入参数: 无
- 创建日期:
----------------------------------------------------------------------------------------------------*/
extern void I2C_Handler(void)
{
uint32_t stat, VAL;
__read_hw_reg32(I2C_INTR_STAT, stat);
if(stat == 0) return;
if(stat & 0x200) __read_hw_reg32(I2C_CLR_STOP_DET, VAL);
if(stat & 0x40) __read_hw_reg32(I2C_CLR_TX_ABRT, VAL);
__read_hw_reg32(I2C_CLR_INTR, VAL); //- 清除中断
if(i2cHandler_Callback != (i2cHandler_callback_t)0) {
i2cHandler_Callback(stat);
}
}
#endif