int platform_uart_recv( unsigned id, unsigned timer_id, int timeout )
{
AT91S_USART* base = id == 0 ? AT91C_BASE_US0 : AT91C_BASE_US1;
timer_data_type tmr_start, tmr_crt;
int res;
if( timeout == 0 )
{
// Return data only if already available
if( USART_IsDataAvailable( base ) )
return USART_Read( base, 0 );
else
return -1;
}
else if( timeout == PLATFORM_UART_INFINITE_TIMEOUT )
{
// Wait for data
return USART_Read( base, 0 );
}
else
{
// Receive char with the specified timeout
tmr_start = platform_timer_op( timer_id, PLATFORM_TIMER_OP_START,0 );
while( 1 )
{
if( USART_IsDataAvailable( base ) )
{
res = USART_Read( base, 0 );
break;
}
else
res = -1;
tmr_crt = platform_timer_op( timer_id, PLATFORM_TIMER_OP_READ, 0 );
if( platform_timer_get_diff_us( timer_id, tmr_crt, tmr_start ) >= timeout )
break;
}
return res;
}
}
int platform_s_uart_recv( unsigned id, s32 timeout )
{
AT91S_USART* base = id == 0 ? AT91C_BASE_US0 : AT91C_BASE_US1;
if( timeout == 0 )
{
// Return data only if already available
if( USART_IsDataAvailable( base ) )
return USART_Read( base, 0 );
else
return -1;
}
return USART_Read( base, 0 );
}
/* Usart receive task */
void vUsartRx_Task( void ) {
unsigned char pucFileName[30]; // File name
unsigned char ucReceived; // Received char
short i;
short sFlag = 0; // State flag
FIL Fil; // File object
FRESULT rc; // Result code
DIR dir; // Directory object
FILINFO fno; // File information object
UINT bw, br; // File counters
// Usart receive loop
for (;;) {
// Data is available
if (USART_IsDataAvailable(AT91C_BASE_US0)) {
USART_ReadBuffer(AT91C_BASE_US0, &ucReceived, 1);
// Stage 0: receive file name
if (sFlag == 0 && ucReceived == '\x01') {
i = 0;
memset(pucFileName, 0, 30);
sFlag = 1;
//debug_printf("\r\n--");
// Stage 1: receiving file name
} else if (sFlag == 1 && ucReceived != '\x02') {
//debug_printf("%c", ucReceived);
pucFileName[i] = ucReceived;
i++;
// Stage 1: end of file name
} else if (sFlag == 1 && ucReceived == '\x02') {
//debug_printf("\r\nRec file: %s\r\n", pucFileName);
sFlag = 2;
// Create the file
rc = f_open(&Fil, pucFileName, FA_CREATE_ALWAYS | FA_WRITE);
if (rc) {
sprintf(ucRemoteBuffer, "File creation failure.\r\n");
remote_printf(ucRemoteBuffer);
sFlag = 0;
}
// Stage 2: receive file
} else if (sFlag == 2 && ucReceived != '\x03') {
//debug_printf("%c", ucReceived);
f_write(&Fil, &ucReceived, 1, &bw);
// Stage 2: end of file
} else if (sFlag == 2 && ucReceived == '\x03') {
sFlag = 3;
// Stage 3: end of transmission
} else if (sFlag == 3 && ucReceived == '\x04') {
f_close(&Fil);
sprintf(ucRemoteBuffer, "\r\nReceived file: %s\r\n", pucFileName);
remote_printf(ucRemoteBuffer);
sFlag = 0;
}
} else {
vTaskDelay(5);
}
}
}