/**************************************************************************************************
* @fn sblExec
*
* @brief Infinite SBL execute loop that jumps upon receiving a code enable.
*
* input parameters
*
* None.
*
* output parameters
*
* None.
*
* @return None.
**************************************************************************************************
*/
static void sblExec(void)
{
uint32 dlyCnt = 0;
while (1)
{
HalUARTPollUSB();
if (sbExec() && sbImgValid())
{
SB_TURN_ON_LED1();
SB_TURN_ON_LED2();
// Delay to allow the SB_ENABLE_CMD response to be flushed.
for (dlyCnt = 0; dlyCnt < 0x40000; dlyCnt++)
{
HalUARTPollUSB();
}
sblJump();
}
else if (dlyCnt++ & 0x4000)
{
SB_TOGGLE_LED1();
}
}
}
/**************************************************************************************************
* @fn sblWait
*
* @brief A timed-out wait loop that exits early upon receiving a force code/sbl byte.
*
* input parameters
*
* None.
*
* output parameters
*
* None.
*
* @return None.
**************************************************************************************************
*/
static void sblWait(void)
{
uint32 dlyCnt = SB_UART_DELAY;
while (1)
{
uint8 ch;
HalUARTPollUSB();
if (HalUARTRx(&ch, 1))
{
if (ch == SB_FORCE_BOOT)
{
break;
}
else if (ch == SB_FORCE_RUN)
{
dlyCnt = 0;
}
}
if (SB1_PRESS)
{
break;
}
if (SB2_PRESS || (dlyCnt-- == 0))
{
sblJump();
}
// RR-xing LED display while waiting.
if (dlyCnt & 0x2000)
{
SB_TURN_OFF_LED2();
SB_TURN_ON_LED1();
}
else
{
SB_TURN_OFF_LED1();
SB_TURN_ON_LED2();
}
}
SB_TURN_OFF_LED1();
SB_TURN_OFF_LED2();
}
/**************************************************************************************************
* @fn main
*
* @brief C-code main functionality.
*
* input parameters
*
* None.
*
* output parameters
*
* None.
*
* @return None.
**************************************************************************************************
*/
void main(void)
{
vddWait(VDD_MIN_RUN);
HAL_BOARD_INIT();
// make sure the DMA channel is selected before we attempt to
// to write anything to flash.
sblInit();
if (sbImgValid())
{
if ((SB_UART_DELAY == 0) || ResetWasWatchDog)
{
sblJump();
}
sblWait();
}
vddWait(VDD_MIN_NV);
sblExec();
HAL_SYSTEM_RESET();
}
/**************************************************************************************************
* @fn main
*
* @brief C-code main functionality.
*
* input parameters
*
* None.
*
* output parameters
*
* None.
*
* @return None.
**************************************************************************************************
*/
void main(void)
{
vddWait(VDD_MIN_RUN);
HAL_BOARD_INIT();
if (sbImgValid())
{
if ((SB_UART_DELAY == 0) || ResetWasWatchDog)
{
sblJump();
}
sblInit();
sblWait();
}
else
{
sblInit();
}
vddWait(VDD_MIN_NV);
sblExec();
HAL_SYSTEM_RESET();
}
