//*----------------------------------------------------------------------------
//* \fn AT91F_LowLevelInit
//* \brief This function performs very low level HW initialization
//*----------------------------------------------------------------------------
void AT91F_LowLevelInit()
{
unsigned int tmp = 0;
AT91PS_PMC pPmc = AT91C_BASE_PMC;
// Disable watchdog
*(AT91C_WDTC_WDMR) = AT91C_WDTC_WDDIS;
AT91F_MATRIX_Remap_ARM(AT91C_BASE_MATRIX);
// Open PIO for DBGU
AT91F_DBGU_CfgPIO();
// Configure DBGU
AT91F_US_Configure (
(AT91PS_USART) AT91C_BASE_DBGU, // DBGU base address
AT91C_MASTER_CLOCK,
AT91C_US_ASYNC_MODE, // mode Register to be programmed
115200 , // baudrate to be programmed
0); // timeguard to be programmed
// Enable Transmitter
AT91F_US_EnableTx((AT91PS_USART) AT91C_BASE_DBGU);
AT91F_US_EnableRx((AT91PS_USART) AT91C_BASE_DBGU);
}
//===============================================================================================
__inline AT91F_US_START_RECEIVE(AT91PS_USART COM, uint8 *data, int size)
{
portENTER_CRITICAL();
{
AT91F_US_TIMEOUT(COM,0x40);
AT91F_US_EnableIt(COM,AT91C_US_RXBUFF | AT91C_US_TIMEOUT | AT91C_US_RXBUFF | AT91C_US_FRAME | AT91C_US_PARE |AT91C_US_OVRE);
AT91F_US_EnableRx(COM);
COM->US_RCR = 0;
COM->US_RNCR = 0;
COM->US_RPR = (unsigned int) data;
COM->US_RCR = size;
}
portEXIT_CRITICAL();
}
//===============================================================================================
inline void AT91F_US_START_RECEIVE(AT91PS_USART COM, uint8 *data, int size)
{
portENTER_CRITICAL();
{
AT91F_US_TIMEOUT_SET(COM,0x20);
AT91F_US_EnableIt(COM, AT91C_US_TIMEOUT | AT91C_US_RXBUFF);
COM->US_RNCR = 0;
COM->US_RNCR = 0;
COM->US_RPR = (unsigned int) data;
COM->US_RCR = size;
AT91F_US_EnableRx(COM);
}
portEXIT_CRITICAL();
}
int main()
{
int _row, _col;
char c;
U32 status;
AT91PS_PIO pPioA = AT91C_BASE_PIOA;
AT91PS_PMC pPMC = AT91C_BASE_PMC;
AT91PS_USART pUART0 = AT91C_BASE_US0;
/* Initialize the Atmel AT91SAM7X256 (watchdog, PLL clock, default interrupts, etc.) */
AT91F_LowLevel_Init();
/* Init the LCD */
InitLCD();
/* Init the UART */
AT91F_US_Configure(pUART0, MCK, AT91C_US_ASYNC_MODE, 9600L, 0 );
AT91F_PMC_EnablePeripheralClock(pPMC, 1 << AT91C_ID_US0 );
AT91F_US_EnableRx(pUART0);
AT91F_US_EnableTx(pUART0);
AT91F_PIO_Disable( pPioA, RXD0 | TXD0 | RTS0 | CTS0 );
AT91F_PIO_A_RegisterSelection( pPioA, RXD0 | TXD0 | RTS0 | CTS0 );
/* enable interrupts */
AT91F_Finalize_Init();
/* add your program here ... */
LCD_ClearScreen( LCD_COLOR_RED );
LCD_WriteString("UART Demo:", &Fixedsys_descriptor, 2, Fixedsys_descriptor.font_height,
LCD_COLOR_WHITE, LCD_COLOR_RED);
_row = 2*(Fixedsys_descriptor.font_height+2);
_col = 2;
/* ... and here */
while ( true )
{
status = AT91F_US_RxReady(pUART0);
if(status) {
c = AT91F_US_GetChar(pUART0);
AT91F_US_PutChar(pUART0, c);
LCD_WriteChar(c, &Fixedsys_descriptor, _col, _row, LCD_COLOR_WHITE, LCD_COLOR_RED);
if (_col<(128-Fixedsys_descriptor.font_width))
_col += Fixedsys_descriptor.font_width;
else {
_col = 2;
_row += (Fixedsys_descriptor.font_height+2);
if (_row>(128-Fixedsys_descriptor.font_height)) {
LCD_ClearScreen( LCD_COLOR_RED );
_row = 2; //Fixedsys_descriptor.font_height;
_col = 2;
}
}
}
else
status = AT91F_US_TxReady(pUART0);
if(status) {
//AT91F_US_PutChar(pUART0, '.');
}
}
/* Actually, the execution never gets here */
return 0;
}
