AT91SAM7S_UART.rar_AT91SAM7S_WORKING_at91sam7s keil_at91sam7s ua

/* Code file for USART */ #include "serial.h" AT91S_USART * pUSART = AT91C_BASE_US0; /* Global Pointer to USART0 */ void init_serial(void) { *AT91C_PMC_PCER |= (1 << AT91C_ID_US0); /* Enable Clock for USART0 */ *AT91C_PIOA_PDR = AT91C_PA5_RXD0 | /* Enable RxD0 Pin */ AT91C_PA6_TXD0; /* Enalbe TxD0 Pin */ pUSART->US_CR = AT91C_US_RSTRX | /* Reset Receiver */ AT91C_US_RSTTX | /* Reset Transmitter */ AT91C_US_RXDIS | /* Receiver Disable */ AT91C_US_TXDIS; /* Transmitter Disable */ pUSART->US_MR = AT91C_US_USMODE_NORMAL | /* Normal Mode */ AT91C_US_CLKS_CLOCK | /* Clock = MCK */ AT91C_US_CHRL_8_BITS | /* 8-bit Data */ AT91C_US_PAR_NONE | /* No Parity */ AT91C_US_NBSTOP_1_BIT; /* 1 Stop Bit */ pUSART->US_BRGR = BRD; /* Baud Rate Divisor */ pUSART->US_CR = AT91C_US_RXEN | /* Receiver Enable */ AT91C_US_TXEN; /* Transmitter Enable */ } int sendChar(int ch) { while (!(pUSART->US_CSR & AT91C_US_TXRDY)); /* Wait for Empty Tx Buffer */ return (pUSART->US_THR = ch); /* Transmit Character */ } void sendString(char *buff) { int i = 0; while(buff[i] != '\0') { sendChar(buff[i]); i++; } } char getChar(void) { while (!(pUSART->US_CSR & AT91C_US_RXRDY)); /* Wait for Full Rx Buffer */ return (pUSART->US_RHR); /* Read Character */ }