STM32 I/O檢查程式

主要是利用xprintf函式做出一個命令式的I/O讀取及觸發程式。
方便電子設計初期的訊號及功能檢查。
xprintf的設計不錯用。只使用二個I/O函式，所以很容易移植。
利用callback方式，除了連接方便外，也可以中途移轉到另一組通道去。
只要使用xdev_in()及xdev_out()就可以掛載I/O函式了。
程式如下：

#include "xprintf.h"

unsigned short usart6_buf;
unsigned int usart6_rx_cnt =0;
void USART6_IRQHandler(void)
{
    if (USART_GetITStatus(USART6, USART_IT_RXNE) != RESET)
    {
        usart6_buf = USART_ReceiveData(USART6);
        usart6_rx_cnt++;
    }
}

unsigned char usart6_getc(void)
{
    static unsigned int usart6_rx_out = 0;

    /* Wait for Rx FIFO ready */
    while (usart6_rx_out == usart6_rx_cnt) vTaskDelay(1);
    usart6_rx_out++;
    return (usart6_buf & 0xFF);
}

void usart6_putc(unsigned char c)
{
//    while (USART_GetFlagStatus(USART6,USART_FLAG_TXE) == RESET) vTaskDelay(1);
    USART_SendData(USART6, c);
    vTaskDelayMs(1);
}

GPIO_TypeDef * const port[7] =
{
    GPIOA,
    GPIOB,
    GPIOC,
    GPIOD,
    GPIOE,
    GPIOF,
    GPIOG
};
unsigned short const pin[16] =
{
    GPIO_Pin_0,
    GPIO_Pin_1,
    GPIO_Pin_2,
    GPIO_Pin_3,
    GPIO_Pin_4,
    GPIO_Pin_5,
    GPIO_Pin_6,
    GPIO_Pin_7,
    GPIO_Pin_8,
    GPIO_Pin_9,
    GPIO_Pin_10,
    GPIO_Pin_11,
    GPIO_Pin_12,
    GPIO_Pin_13,
    GPIO_Pin_14,
    GPIO_Pin_15
};

char Line[256];                /* Console input buffer */

static void vParser_Task( void *pvParameters )
{
    char *ptr;
    long p1;
    long p2;
    GPIO_TypeDef*  GPIOx;
    unsigned short GPIO_Pin_y;

    (void) pvParameters;
    // set device
    USART6_Config();
    xdev_in(usart6_getc);
    xdev_out(usart6_putc);
    xputs("\nI/O test monitor for STM32F205 evaluation board.\n");
//    xprintf("LFN=%s, CP=%u\n", _USE_LFN ? "Enabled" : "Disabled", _CODE_PAGE);
    for ( ;; )
    {
        xputc('>');
        xgets(Line, sizeof Line);

        ptr = Line;
        switch (*ptr++)
        {
        case '?' :    /* Show Command List */
            xputs(HelpMsg);
            break;

        case 'r' :    // Read Input
            switch (*ptr++)
            {
            case 'a' :    // ra port
                GPIOx = port[0];
                break;
            case 'b' :    // rb port
                GPIOx = port[1];
                break;
            case 'c' :    // rc port
                GPIOx = port[2];
                break;
            case 'd' :    // rd port
                GPIOx = port[3];
                break;
            case 'e' :    // re port
                GPIOx = port[4];
                break;
            case 'f' :    // rf port
                GPIOx = port[5];
                break;
            case 'g' :    // rg port
                GPIOx = port[6];
                break;
            }
            if (!xatoi(&ptr, &p1)) break;
            GPIO_Pin_y = pin[p1];
            GPIO_ReadInputDataBit(GPIOx, GPIO_Pin_y);
            break;
        case 'w' :    // Write Output
            switch (*ptr++)
            {
            case 'a' :    // wa port data
                GPIOx = port[0];
                break;
            case 'b' :    // wb port data
                GPIOx = port[1];
                break;
            case 'c' :    // wc port data
                GPIOx = port[2];
                break;
            case 'd' :    // wd port data
                GPIOx = port[3];
                break;
            case 'e' :    // we port data
                GPIOx = port[4];
                break;
            case 'f' :    // wf port data
                GPIOx = port[5];
                break;
            case 'g' :    // wg port data
                GPIOx = port[6];
                break;
            }
            if (!xatoi(&ptr, &p1)) break;
            if (!xatoi(&ptr, &p2)) break;
            GPIO_Pin_y = pin[p1];
            if ( !p2 )
            {
                GPIO_ResetBits(GPIOx, GPIO_Pin_y);
            }
            else
            {
                GPIO_SetBits(GPIOx, GPIO_Pin_y);
            }
            break;
        }
        vTaskDelayMs(1);
    }
}

void main(void)
{
    void vUSART1_Task( void *pvParameters );

    GPIO_Config();

    xTaskCreate( vParser_Task,   ( signed char * ) "Parser", 512, NULL, tskIDLE_PRIORITY + 1, NULL );

    vTaskStartScheduler();
}