/** Turn On the USART
*
* @param drv_info
* @param pMode
*/
void USART_CFG(USART_INFO drv_info, DRV_UART_MODE pMode)
{
Usart* pUsart =drv_info->hw_base;
drv_pmc_enable(&drv_info->info);
pUsart->US_WPMR = US_WPMR_WPKEY(0x555341);
//* Reset receiver and transmitter
pUsart->US_CR = US_CR_RSTRX | US_CR_RSTTX | US_CR_RXDIS | US_CR_TXDIS;
//* Define the baud rate divisor register
pUsart->US_BRGR = AT91_GetDiv(pMode->baudrate);
//* Write the Timeguard Register
pUsart->US_TTGR = 3 ;
pUsart->US_RTOR = pMode->rtout;
//* Define the USART mode
pUsart->US_MR = pMode->mode;
//* Clear Transmit and Receive Counters
pUsart->US_TNCR = 0;
pUsart->US_TCR = 0;
pUsart->US_RNCR = 0;
pUsart->US_RCR = 0;
pUsart->US_PTCR = US_PTCR_RXTEN | US_PTCR_TXTEN;
// Enable Usart
pUsart->US_CR = US_CR_TXEN | US_CR_RXEN | US_CR_STTTO;
pUsart->US_IER = US_IER_ENDRX | US_IER_TIMEOUT;
drv_enable_isr(&drv_info->info);
PIO_CfgPeriph(&drv_info->pins);
}
void UART_OFF(Uart* pUart)
{
//* Disable all interrupts
pUart->UART_IDR = UART_IDR_RXRDY | UART_IDR_TXRDY | UART_IDR_ENDRX
| UART_IDR_ENDTX | UART_IDR_OVRE | UART_IDR_FRAME | UART_IDR_PARE
| UART_IDR_TXEMPTY | UART_IDR_TXBUFE | UART_IDR_RXBUFF;
//* Reset the baud rate divisor register
pUart->UART_BRGR = 0 ;
//* Reset the USART mode
pUart->UART_MR = 0 ;
//* Abort the Peripheral Data Transfers
pUart->UART_PTCR =UART_PTCR_RXTDIS | UART_PTCR_TXTDIS;
pUart->UART_RNCR = 0;
pUart->UART_TNCR = 0;
pUart->UART_RCR = 0;
pUart->UART_TCR = 0;
//* Disable receiver and transmitter and stop any activity immediately
pUart->UART_CR = UART_CR_TXDIS | UART_CR_RXDIS | UART_CR_RSTTX | UART_CR_RSTRX;
//RTS =1 (not ready)
PIO_CfgPeriph(DRXD_PIN | DTXD_PIN);
}
