roboot/str71x/roboot_if_comm_str71x.c

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/* ================================================================================ *//* ================================================================================= */


#include "71x_lib.h"

#include "roboot_if_comm.h"
#include "config.h"


#if BOOTLOADER_USART == USART_0
#define USARTx                          UART0
#define BOOTLOADER_USART_RX_PORT        GPIO0
#define BOOTLOADER_USART_RX_PIN         (0x0001<<8)   /*  TQFP 64: pin N° 63 , TQFP 144 pin N° 143 */
#define BOOTLOADER_USART_TX_PORT        GPIO0
#define BOOTLOADER_USART_TX_PIN         (0x0001<<9)   /*  TQFP 64: pin N° 64 , TQFP 144 pin N° 144 */
#elif BOOTLOADER_USART == USART_1
#define USARTx UART1
#define BOOTLOADER_USART_RX_PORT        GPIO0
#define BOOTLOADER_USART_RX_PIN         (0x0001<<10)  /*  TQFP 64: pin N° 1  , TQFP 144 pin N° 1 */
#define BOOTLOADER_USART_TX_PORT        GPIO0
#define BOOTLOADER_USART_TX_PIN         (0x0001<<11)  /*  TQFP 64: pin N° 2  , TQFP 144 pin N° 3 */
#elif BOOTLOADER_USART == USART_2
#define USARTx UART2
#define BOOTLOADER_USART_RX_PORT        GPIO0
#define BOOTLOADER_USART_RX_PIN         (0x0001<<13)  /*  TQFP 64: pin N° 5  , TQFP 144 pin N° 9 */
#define BOOTLOADER_USART_TX_PORT        GPIO0
#define BOOTLOADER_USART_TX_PIN         (0x0001<<14)  /*  TQFP 64: pin N° 6  , TQFP 144 pin N° 10 */
#elif BOOTLOADER_USART == USART_3
#define USARTx UART3
#define BOOTLOADER_USART_RX_PORT        GPIO0
#define BOOTLOADER_USART_RX_PIN         (0x0001<<1)   /*  TQFP 64: pin N° 52 , TQFP 144 pin N° 123 */
#define BOOTLOADER_USART_TX_PORT        GPIO0
#define BOOTLOADER_USART_TX_PIN         (0x0001<<0)   /*  TQFP 64: pin N° 53 , TQFP 144 pin N° 124 */
#else
#error "Wrong USART configured"
#endif



/**************************************************************************************************\
\**************************************************************************************************/
void CommHwInit(void)
{
    GPIO_Config(BOOTLOADER_USART_TX_PORT, BOOTLOADER_USART_TX_PIN, GPIO_AF_PP);
    GPIO_Config(BOOTLOADER_USART_RX_PORT, BOOTLOADER_USART_RX_PIN, GPIO_IN_TRI_CMOS);

    UART_Init(USARTx);
    UART_OnOffConfig(USARTx, ENABLE);
    UART_Config(USARTx, BOOTLOADER_USART_SPEED, BOOTLOADER_USART_PARITY, BOOTLOADER_USART_STOPBITS, UARTM_8D);
    UART_FifoConfig (USARTx, ENABLE);
    UART_RxConfig(USARTx , ENABLE);
}


/**************************************************************************************************\
\**************************************************************************************************/
void CommHwDeinit(void)
{
    UART_Init(USARTx);
}

/**************************************************************************************************\
\**************************************************************************************************/
void CommHwSendByte(uint8_t c)
{
    UART_ByteSend(USARTx, &c);
}


/**************************************************************************************************\
\**************************************************************************************************/
int16_t CommHwGetByte(void)
{
    if (USARTx->SR & UART_RxBufNotEmpty)
    {
        return (int16_t)(USARTx->RxBUFR & 0x00FFU);
    }
    else
    {
        return -1;
    }
}

/**************************************************************************************************\
\**************************************************************************************************/
void MCUBusyDelay(void)
{
    volatile uint32_t delay;

    delay = 80UL;

    while (delay--)
    {
        __asm volatile
            (
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
                "   nop                     \n"
            );
    }
}

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