The iic issue in ch32v003

[ztf402]

When I trying to use iic in ch32v003, the arduino library may cost a lot of memory to initialize the iic (about 7000bytes),which is almost the half of the tatal ROM.Frankly speaking ,this way can success initalizing.When I trying to cut down the rom usage by replace the arduino framework with None-os,but it can't work correctly.Neither the offical (WCH.)'s example code nor my custom code did not work in it.But,when I paste them to the MonuRiver Studio,it can work normally.

[maxgerhardt]

Please post the full project of your NoneWCH project in which I2C does not work normally and state which device you connect it to. Do you have traces of the SCL and SDA lines for the PlatformIO firwmare and MouRiver firmware?

What Arudino core did you use for the CH32V003? The default OpenWCH one or https://github.com/Community-PIO-CH32V/arduino-wch32v003? It has a Wire library too, but lacking lots of other features.

[ztf402]

I have compared the complied file between MonuRiver's and platform's,both have build flag -Os,but the output files' size is different.I think it might be a bug in the build flag in platformio's ch32v

[ztf402]

I using the default OpenWCH [one,]

My iic init and it are below:void I2C1_EV_IRQHandler(void)

__attribute__((interrupt("WCH-Interrupt-fast")));
void I2C1_ER_IRQHandler(void) __attribute__((interrupt("WCH-Interrupt-fast")));

void IIC_Init(u32 bound, u16 address)
{
    GPIO_InitTypeDef GPIO_InitStructure={0};
    I2C_InitTypeDef I2C_InitTSturcture={0};
    NVIC_InitTypeDef NVIC_InitStructure = {0};

    RCC_APB2PeriphClockCmd( RCC_APB2Periph_GPIOC | RCC_APB2Periph_AFIO, ENABLE );
    RCC_APB1PeriphClockCmd( RCC_APB1Periph_I2C1, ENABLE );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init( GPIOC, &GPIO_InitStructure );

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_1;
    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_OD;
    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
    GPIO_Init( GPIOC, &GPIO_InitStructure );

    I2C_InitTSturcture.I2C_ClockSpeed = bound;
    I2C_InitTSturcture.I2C_Mode = I2C_Mode_I2C;
    I2C_InitTSturcture.I2C_DutyCycle = I2C_DutyCycle_16_9;
    I2C_InitTSturcture.I2C_OwnAddress1 = address;
    I2C_InitTSturcture.I2C_Ack = I2C_Ack_Enable;
    I2C_InitTSturcture.I2C_AcknowledgedAddress = I2C_AcknowledgedAddress_7bit;
    I2C_Init( I2C1, &I2C_InitTSturcture );

    I2C_Cmd( I2C1, ENABLE );


    NVIC_InitStructure.NVIC_IRQChannel = I2C1_EV_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init( &NVIC_InitStructure );

    NVIC_InitStructure.NVIC_IRQChannel = I2C1_ER_IRQn;
    NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
    NVIC_Init( &NVIC_InitStructure );

    I2C_ITConfig( I2C1, I2C_IT_BUF, ENABLE );
    I2C_ITConfig( I2C1, I2C_IT_EVT, ENABLE );
    I2C_ITConfig( I2C1, I2C_IT_ERR, ENABLE );

}
void I2C1_EV_IRQHandler(void)
{
    if( I2C_GetITStatus( I2C1, I2C_IT_ADDR ) != RESET )
    {
        if(I2C_GetFlagStatus( I2C1, I2C_FLAG_TRA )&&I2C_GetFlagStatus( I2C1, I2C_FLAG_TXE ))
        {
            //write mode
        }else
        {
            //read mode
            ((void)I2C_ReadRegister(I2C1, I2C_Register_STAR2));
        }
    }
    else if( I2C_GetITStatus( I2C1, I2C_IT_RXNE ) != RESET )
   {
       // RxData[slave_recv_len] = I2C_ReceiveData(I2C1);
        //slave_recv_len++;
   }else if( I2C_GetITStatus( I2C1, I2C_IT_STOPF ) != RESET )
   {
       I2C1->CTLR1 &= I2C1->CTLR1;
       ((void)(I2C1->STAR1));
   }

    else if( I2C_GetITStatus( I2C1, I2C_IT_BTF ) != RESET )
   {
        ((void)I2C_ReadRegister( I2C1, I2C_Register_STAR1));
        ((void)I2C_ReceiveData(I2C1));
   }
   else if( I2C_GetITStatus( I2C1, I2C_IT_SB ) != RESET )
  {
       ((void)I2C_ReadRegister( I2C1, I2C_Register_STAR1));
      ((void)I2C_ReceiveData(I2C1));
  }
   else if( I2C_GetITStatus( I2C1, I2C_IT_TXE ) != RESET )
  {
       //I2C_SendData(I2C1,  RxData[slave_send_len]);
      //slave_send_len++;

  }
}

/**
 * @brief  I2C1 错误中断服务例程：清除 NACK 等
 */
void I2C1_ER_IRQHandler(void)
{
    if( I2C_GetITStatus( I2C1, I2C_IT_AF ) )
    {
        I2C_ClearITPendingBit(I2C1, I2C_IT_AF);
    }else{
        //err
    }
}

[maxgerhardt]

This is really not enough to be reproducable. Can you upload your PlatformIO project to Github as a whole?

-Os is already the default flag. No need to add it to build_flags.

Also what version of MounRiver are you using? Right now the platform has not yet been updated to use the newer RISCV GCC compiler or the newer NoneSDK version, so size differences are expected. This will be updated soon.