osd-contiki/cpu/cc2430/dev/uart.c

#include <stdlib.h>
#include <string.h>

#include "cc2430_sfr.h"

#include "dev/leds.h"
#include "dev/uart.h"

static int (*uart0_input_handler)(unsigned char c);
static int (*uart1_input_handler)(unsigned char c);

/*---------------------------------------------------------------------------*/
void
uart0_init(uint32_t speed)
{
  if(speed != 115200) {
    return;
  }

#ifdef UART0_ALTERNATIVE_2
  PERCFG |= U0CFG;	/*alternative port 2 = P1.5-2*/
#ifdef UART0_RTSCTS
  P1SEL |= 0x3C;		/*peripheral select for TX and RX, RTS, CTS*/
#else
  P1SEL |= 0x30;		/*peripheral select for TX and RX*/
  P1 &= ~0x08;		/*RTS down*/
#endif
  P1DIR |= 0x28;		/*RTS, TX out*/
  P1DIR &= ~0x14;		/*CTS & RX in*/
#else
  PERCFG &= ~U0CFG;	/*alternative port 1 = P0.5-2*/
#ifdef UART0_RTSCTS
  P0SEL |= 0x3C;		/*peripheral select for TX and RX, RTS, CTS*/
#else
  P0SEL |= 0x0C;		/*peripheral select for TX and RX*/
  P0 &= ~0x20;		/*RTS down*/
#endif
  P0DIR |= 0x28;		/*RTS & TX out*/
  P0DIR &= ~0x14;		/*CTS & RX in*/
#endif
  
  if(speed == 115200) {
    U0BAUD=216;	/*115200*/
    U0GCR =11; 	/*LSB first and 115200*/
  }

  if(speed == 38400) {
    U0BAUD=59;	/*38400*/
    U0GCR =10; 	/*LSB first and 38400*/
  }

  if(speed == 9600) {
    U0BAUD= 59;	/* 9600 */
    U0GCR = 8; 	/*LSB first and 9600*/
  }

#ifdef UART0_RTSCTS
  U0UCR = 0x42;		/*defaults: 8N1, RTS/CTS, high stop bit*/
#else
  U0UCR = 0x02;		/*defaults: 8N1, no flow control, high stop bit*/
#endif
  
  U0CSR = U_MODE | U_RE | U_TXB;  /*UART mode, receiver enable, TX done*/
  
  /*set priority group of group 3 to highest, so the UART won't miss bytes*/
  IP1 |= IP1_3;
  IP0 |= IP0_3;
  
  IEN0_URX0IE = 1;
}
/*---------------------------------------------------------------------------*/
/* Write one byte over the UART. */
void
uart0_writeb(uint8_t byte)
{
  IRCON2_UTX0IF = 0;
  U0BUF = byte;
  while(!IRCON2_UTX0IF); /* Wait until byte has been transmitted. */
  IRCON2_UTX0IF = 0;
}
/*---------------------------------------------------------------------------*/
void
uart0_set_input(int (*input)(unsigned char c))
{
  uart0_input_handler = input;
}
/*---------------------------------------------------------------------------*/
void
uart0_rxISR(void) __interrupt (URX0_VECTOR)
{
  TCON_URX0IF = 0;
  if(uart0_input_handler != NULL) {
    uart0_input_handler(U0BUF);
  }
}
/*---------------------------------------------------------------------------*/
void
uart0_txISR( void ) __interrupt (UTX0_VECTOR)
{
}
/*---------------------------------------------------------------------------*/
/* UART1 initialization */
void
uart1_init(uint32_t speed)
{
#ifdef UART1_ALTERNATIVE_1
  PERCFG &= ~U1CFG;	/*alternative port 1 = P0.5-2*/
#ifdef UART1_RTSCTS
  P0SEL |= 0x3C;		/*peripheral select for TX and RX, RTS, CTS*/
#else
  P0SEL |= 0x30;		/*peripheral select for TX and RX*/
  P0 &= ~0x08;		/*RTS down*/
#endif
  P0DIR |= 0x18;		/*RTS, TX out*/
  P0DIR &= ~0x24;		/*CTS, RX in*/
#else
  PERCFG |= U1CFG;	/*alternative port 2 = P1.7-4*/
#ifdef UART1_RTSCTS
  P1SEL |= 0xF0;		/*peripheral select for TX and RX*/
#else
  P1SEL |= 0xC0;		/*peripheral select for TX and RX*/
  P1 &= ~0x20;		/*RTS down*/
#endif
  P1DIR |= 0x60;		/*RTS, TX out*/
  P1DIR &= ~0x90;		/*CTS, RX in*/
#endif
  
  if(speed == 115200) {
    U1BAUD=216;	/*115200*/
    U1GCR =11; 	/*LSB first and 115200*/
  }

  if(speed == 38400) {
    U1BAUD=59;	/*38400*/
    U1GCR =10; 	/*LSB first and 38400*/
  }

  if(speed == 9600) {
    U1BAUD= 59;	/* 9600 */
    U1GCR = 8; 	/*LSB first and 9600*/
  }

#ifdef UART1_RTSCTS
  U1UCR = 0x42;	/*defaults: 8N1, RTS/CTS, high stop bit*/
#else
  U1UCR = 0x02;	/*defaults: 8N1, no flow control, high stop bit*/
#endif
  
  U1CSR = U_MODE | U_RE | U_TXB;  /*UART mode, receiver enable, TX done*/
  
  /*set priority group of group 3 to highest, so the UART won't miss bytes*/
  IP1 |= IP1_3;
  IP0 |= IP0_3;
  
  IEN0_URX1IE = 1;	/* Enable the RX interrupt */
}
/*---------------------------------------------------------------------------*/
/* Write one byte over the UART. */
void
uart1_writeb(uint8_t byte)
{
  IRCON2_UTX1IF = 0;
  U1BUF = byte;
  while(!IRCON2_UTX1IF); /* Wait until byte has been transmitted. */
  IRCON2_UTX1IF = 0;
}
/*---------------------------------------------------------------------------*/
void
uart1_set_input(int (*input)(unsigned char c))
{
  uart1_input_handler = input;
}
/*---------------------------------------------------------------------------*/
void
uart1_rxISR(void) __interrupt (URX1_VECTOR)
{
  TCON_URX1IF = 0;
  if(uart1_input_handler != NULL) {
    uart1_input_handler(U1BUF);
  }
}
/*---------------------------------------------------------------------------*/
void
uart1_txISR( void ) __interrupt (UTX1_VECTOR)
{
}
/*---------------------------------------------------------------------------*/