//*----------------------------------------------------------------------------
//* \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);
}
/*
* See the serial2.h header file.
*/
xComPortHandle xSerialPortInitMinimal( unsigned long ulWantedBaud, unsigned portBASE_TYPE uxQueueLength )
{
xComPortHandle xReturn = serHANDLE;
extern void ( vUART_ISR )( void );
/* Create the queues used to hold Rx and Tx characters. */
xRxedChars = xQueueCreate( uxQueueLength, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
xCharsForTx = xQueueCreate( uxQueueLength + 1, ( unsigned portBASE_TYPE ) sizeof( signed char ) );
/* If the queues were created correctly then setup the serial port
hardware. */
if( ( xRxedChars != serINVALID_QUEUE ) && ( xCharsForTx != serINVALID_QUEUE ) )
{
portENTER_CRITICAL();
{
/* Enable the USART clock. */
AT91F_PMC_EnablePeriphClock( AT91C_BASE_PMC, 1 << AT91C_ID_US0 );
AT91F_PIO_CfgPeriph( AT91C_BASE_PIOA, ( ( unsigned long ) AT91C_PA5_RXD0 ) | ( ( unsigned long ) AT91C_PA6_TXD0 ), serNO_PERIPHERAL_B_SETUP );
/* Set the required protocol. */
AT91F_US_Configure( serCOM0, configCPU_CLOCK_HZ, AT91C_US_ASYNC_MODE, ulWantedBaud, serNO_TIMEGUARD );
/* Enable Rx and Tx. */
serCOM0->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
/* Enable the Rx interrupts. The Tx interrupts are not enabled
until there are characters to be transmitted. */
AT91F_US_EnableIt( serCOM0, AT91C_US_RXRDY );
/* Enable the interrupts in the AIC. */
AT91F_AIC_ConfigureIt( AT91C_BASE_AIC, AT91C_ID_US0, serINTERRUPT_LEVEL, AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE, ( void (*)( void ) ) vSerialISREntry );
AT91F_AIC_EnableIt( AT91C_BASE_AIC, AT91C_ID_US0 );
}
portEXIT_CRITICAL();
}
else
{
xReturn = ( xComPortHandle ) 0;
}
/* This demo file only supports a single port but we have to return
something to comply with the standard demo header file. */
return xReturn;
}
void Usart0_init ( long BaudRate )
{
US0_QUEUE = xQueueCreate( 10, sizeof( unsigned int ) );
US0_Error = ErrorCreate("US0_Error");
while( US0_QUEUE == 0 ) ; // Queue was not created and must not be used.
portENTER_CRITICAL();
{
AT91F_US0_CfgPIO() ; //* Define RXD and TXD as peripheral
AT91F_PMC_EnablePeriphClock ( AT91C_BASE_PMC, 1<<AT91C_ID_US0 ) ; // First, enable the clock of the PIOB
AT91F_US_Configure (COM0, MCK,AT91C_US_ASYNC_MODE, BaudRate , 0); // Usart Configure
AT91F_AIC_ConfigureIt ( AT91C_BASE_AIC,
AT91C_ID_US0,
USART_INTERRUPT_LEVEL,
AT91C_AIC_SRCTYPE_INT_LEVEL_SENSITIVE,
( void (*)( void ) )AT91_US0_ISR_ENTRY);
AT91F_AIC_EnableIt (AT91C_BASE_AIC, AT91C_ID_US0);
}
portEXIT_CRITICAL();
}
//*----------------------------------------------------------------------------
//* \fn AT91F_DBGU_Init
//* \brief This function is used to send a string through the DBGU channel (Very low level debugging)
//*----------------------------------------------------------------------------
void AT91F_DBGU_Init(void)
{
unsigned int rst_status = AT91F_RSTGetStatus(AT91C_BASE_RSTC);
dbgu_rb_init();
//* Open PIO for DBGU
AT91F_DBGU_CfgPIO();
//* Enable Transmitter & receivier
((AT91PS_USART) AT91C_BASE_DBGU)->US_CR =
AT91C_US_RSTTX | AT91C_US_RSTRX;
//* Configure DBGU
AT91F_US_Configure((AT91PS_USART) AT91C_BASE_DBGU, // DBGU base address
MCK, AT91C_US_ASYNC_MODE, // Mode Register to be programmed
AT91C_DBGU_BAUD, // Baudrate to be programmed
0); // Timeguard to be programmed
//* Enable Transmitter & receivier
((AT91PS_USART) AT91C_BASE_DBGU)->US_CR = AT91C_US_RXEN | AT91C_US_TXEN;
//* Enable USART IT error and AT91C_US_ENDRX
AT91F_US_EnableIt((AT91PS_USART) AT91C_BASE_DBGU, AT91C_US_RXRDY);
//* open interrupt
sysirq_register(AT91SAM7_SYSIRQ_DBGU, &DBGU_irq_handler);
AT91F_DBGU_Printk("\n\r");
AT91F_DBGU_Printk("(C) 2006-2011 by Harald Welte <*****@*****.**>\n\r"
"This software is FREE SOFTWARE licensed under GNU GPL\n\r");
AT91F_DBGU_Printk("Version " COMPILE_SVNREV
" compiled " COMPILE_DATE
" by " COMPILE_BY "\n\r\n\r");
AT91F_DBGU_Printk("\n\rDEBUG Interface:\n\r"
"0) Set Pull-up 1) Clear Pull-up 2) Toggle LED1 3) "
"Toggle LED2\r\n9) Reset\n\r");
debugp("RSTC_SR=0x%08x\n", rst_status);
}
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;
}
//===============================================================================================
void AT91F_USART_OPEN(AT91_USART_ID idPort, long BaudRate, int mode)
{
portENTER_CRITICAL();
{
switch (idPort)
{
case AT91_USART_COM0_ID:
COM0.id = idPort;
COM0.hPort = AT91C_BASE_US0;
COM0.hError = ErrorCreate("US0_Error");
COM0.hPDC = AT91C_BASE_PDC_US0;
AT91F_PDC_Open(COM0.hPDC);
// AT91F_US0_CfgPIO(); //* Define RXD and TXD as peripheral
AT91F_PIO_CfgPeriph(AT91C_BASE_PIOA, // PIO controller base address
(((unsigned int) AT91C_PA5_RXD0)
| ((unsigned int) AT91C_PA6_TXD0)), // Peripheral A
0);
AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_US0); // First, enable the clock of the PIOB
AT91F_US_Configure(COM0.hPort, MCK, mode, BaudRate, 0); // Usart Configure
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_US0,
USART_INTERRUPT_LEVEL, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL,
(void(*)(void)) AT91_US0_ISR_ENTRY);
AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_US0);
COM0.hRxQueue = xQueueCreate(1, sizeof(int));
while (COM0.hRxQueue == 0)
; // Queue was not created and must not be used.
COM0.hTxQueue = xQueueCreate(1, sizeof(int));
while (COM0.hTxQueue == 0)
; // Queue was not created and must not be used.
break;
case AT91_USART_COM1_ID:
COM1.id = idPort;
COM1.hPort = AT91C_BASE_US1;
COM1.hPDC = AT91C_BASE_PDC_US1;
COM1.hError = ErrorCreate("US1_Error");
AT91F_PDC_DisableTx(COM1.hPDC);
AT91F_PDC_DisableRx(COM1.hPDC);
AT91F_PIO_CfgPeriph(AT91C_BASE_PIOA, // PIO controller base address
(((unsigned int) AT91C_PA21_RXD1)
| ((unsigned int) AT91C_PA22_TXD1)), // Peripheral A
0);
AT91F_PMC_EnablePeriphClock(AT91C_BASE_PMC, 1 << AT91C_ID_US1); // First, enable the clock of the PIOB
AT91F_US_Configure(COM1.hPort, MCK, mode, BaudRate, 0); // Usart Configure
AT91F_AIC_ConfigureIt(AT91C_BASE_AIC, AT91C_ID_US1,
USART_INTERRUPT_LEVEL, AT91C_AIC_SRCTYPE_INT_HIGH_LEVEL,
(void(*)(void)) AT91_US1_ISR_ENTRY);
AT91F_AIC_EnableIt(AT91C_BASE_AIC, AT91C_ID_US1);
COM1.hRxQueue = xQueueCreate(1, sizeof(int));
while (COM1.hRxQueue == 0)
; // Queue was not created and must not be used.
COM1.hTxQueue = xQueueCreate(1, sizeof(int));
while (COM1.hTxQueue == 0)
; // Queue was not created and must not be used.
break;
default:
while (1)
;// error port notfound;
}
}
portEXIT_CRITICAL();
}
