How to use the other UART in sn8200(Discover Wi-Fi)?

Can you first remove other things and just get demo working? That way we can eliminate hardware issues.

Clem

Can you first remove other things and just get demo working? That way we can eliminate hardware issues.

Clem

I checked the demo at first when I use it.

I tested all the functions and it was working very well.

Unfortunately, It doesn't work only for other UART function and I checked wiring between the mcu and wifi.

Could you give me another solution for me?

Thanks

MJ

Can you post the changes to the demo only? Otherwise can you move your parts to other pins?

Thanks,

Clem

Firstly, Thanks for reply.

-For the software

I changed below code. Below code is given and I changed USART1 --> USART2

and pin assignment are changed to PA2 as a Tx and PA3 as a RX.

Also UART CLOCK is changed APB2 --> APB1.

-For the hardware

I wired PA2 with   RX pin and PA3 with  SN8200SN8200 TXpin

void SN8200_HAL_Init(uint32_t baudrate)

{

    GPIO_InitTypeDef GPIO_InitStructure;

    USART_InitTypeDef USART_InitStructure;

    NVIC_InitTypeDef NVIC_InitStructure;

    /* Enable GPIO clock */

    RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOB, ENABLE);

    /* Enable UART clock */

    RCC_APB2PeriphClockCmd(RCC_APB2Periph_USART1, ENABLE);

    /* Connect PXx to USARTx_Tx*/

    GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_USART1);

    /* Connect PXx to USARTx_Rx*/

    GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_USART1);

    /* Configure USART Tx as alternate function  */

    GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;

    GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;

    GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;

    GPIO_Init(GPIOB, &GPIO_InitStructure);

    /* Configure USART Rx as alternate function  */

    GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;

    GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7;

    GPIO_Init(GPIOB, &GPIO_InitStructure);

    NVIC_PriorityGroupConfig(NVIC_PriorityGroup_0);

    /* Enable the USART1 Interrupt */

    NVIC_InitStructure.NVIC_IRQChannel = USART1_IRQn;

    NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;

    NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;

    NVIC_Init(&NVIC_InitStructure);

    /* USART configuration */

    USART_InitStructure.USART_BaudRate = baudrate;

    USART_InitStructure.USART_WordLength = USART_WordLength_8b;

    USART_InitStructure.USART_StopBits = USART_StopBits_1;

    USART_InitStructure.USART_Parity = USART_Parity_No;

    USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;

    USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;

    USART_Init(USART1, &USART_InitStructure);

    USART_ITConfig(USART1, USART_IT_RXNE, ENABLE);

    /* Enable USART */

    USART_Cmd(USART1, ENABLE);

}

void SN8200_HAL_SendData(unsigned char *buf, int len)

{

    int i;

    for (i = 0; i < len; i++) {

        USART_SendData(USART1, buf[i]);

        while (USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);

    }

}

bool SN8200_HAL_RxBufferEmpty(void)

{

    return (RxBufferHead == RxBufferTail);

}

uint8_t SN8200_HAL_ReadByte(void)

{

    uint8_t data = 0;

    if(RxBufferHead != RxBufferTail) {

        data = RxBuffer[RxBufferTail];

        RxBufferTail = (RxBufferTail + 1) % RX_BUFFER_SIZE;

    }

    return data;

}

void USART1_IRQHandler(void)

{

    if(USART_GetITStatus(USART1, USART_IT_RXNE) != RESET) {

        RxBuffer[RxBufferHead] = USART_ReceiveData(USART1);

        RxBufferHead = (RxBufferHead + 1) % RX_BUFFER_SIZE;

    }

}

@Clem

I found one problem.

A problem is that Tx pin is not changed even if I changed it code well.

1. Given example , Tx, Rx are assigned PB6,PB7 respectively.

2. I changed it to UART2 and Tx, Rx are assigned PA2,PA3 respectively and wiring is also well.

3. I scope PA2 and PA3 then, PA3 state is high butt PA1 is low.

and I also scope to UART1 which are PB6 and PB7. PB6 is still high and PB7 is low.

Summary: Only UART Tx is not changed...

Could you give me advice and share your idea with me?

It would be very helpful

Thanks 

2. I changed it to UART2 and Tx, Rx are assigned PA2,PA3 respectively and wiring is also well.

3. I scope PA2 and PA3 then, PA3 state is high butt PA1 is low.

and I also scope to UART1 which are PB6 and PB7. PB6 is still high and PB7 is low.

Is this a typo?

I am sorry

I made terrible typo..