return UDR0;
}
-//! Receive a byte.
-unsigned char serial1_rx(){
- return 0;
-}
//! Transmit a byte.
void serial0_tx(unsigned char x){
UDR0 = x;
}
-//! Transmit a byte on the second UART.
-void serial1_tx(unsigned char x){
-}
//! Set the baud rate.
void setbaud0(unsigned char rate){
- /* disable briefly */
- UCSR0B = 0;
-
- UBRR0L = 4; /* 500,000 baud at 20MHz */
- //UBRR0L = 1; /* 500,000 baud at 8MHz */
- //UBRR0L = 103; /* 9600 baud */
- // XXX UBRR0L = 8; /* 115200 baud ERROR RATE TOO HIGH */
- UBRR0H = 0;
-
- UCSR0A = (1 << U2X0); /* double the baud rate */
- UCSR0C = (3 << UCSZ00); /* 8N1 */
-
- /* enabling rx/tx must be done after frame/baud setup */
- UCSR0B = ((1 << TXEN0) | (1 << RXEN0));
-
- return;
-
-}
+ /* disable everything briefly */
+ UCSR0B = 0;
-//! Set the baud rate of the second uart.
-void setbaud1(unsigned char rate){
- //http://mspgcc.sourceforge.net/baudrate.html
+ int32_t r;
switch(rate){
case 1://9600 baud
-
+ r = 9600;
break;
case 2://19200 baud
-
+ r = 19200;
break;
case 3://38400 baud
-
+ r = 38400;
break;
case 4://57600 baud
-
+ r = 57600;
break;
+
default:
case 5://115200 baud
-
+ r = 115200;
break;
}
+
+ /* enabling rx/tx must be done before frame/baud setup */
+ UCSR0B = ((1 << TXEN0) | (1 << RXEN0));
+
+ UCSR0A = (1 << U2X0); /* double the baud rate */
+ UCSR0C = (3 << UCSZ00); /* 8N1 */
+
+ UBRR0L = (int8_t) (F_CPU/(r*8L)-1);
+ UBRR0H = (F_CPU/(r*8L)-1) >> 8;
+
+ return;
+
}
}
void led_init(){
-
+
+ PLEDDIR |= (1 << PLEDPIN);
}
void led_on() {
- PLEDOUT |= (1 << PLEDPIN);
+ PLEDOUT |= (1 << PLEDPIN);
}
void led_off() {
- PLEDOUT &= ~(1 << PLEDPIN);
+ PLEDOUT &= ~(1 << PLEDPIN);
}
void zigduino_init(){
- uint8_t x;
-
- /* explicitly clear interrupts */
- cli();
-
- /* move the vectors */
-
- /* move interrupts from boot flash section */
- /* NB */
- /* you MUST use a variable during this process. even highly optimized,
- * masking the bit, shifting, ANDing, and setting MCUCR will exceed
- * 4 CPU cycles! set a variable with the desired value for MCUCR and
- * then set the register once IVCE is enabled
- */
- x = MCUCR & ~(1 << IVSEL);
-
- /* enable change of interrupt vectors */
- /* NOTE: setting IVCE disables interrupts until the bit is auto-unset
- * 4 cycles after being set or after IVSEL is written
- */
- MCUCR |= (1 << IVCE);
- MCUCR = x;
-
- /* disable the watchdog timer; this macro will disable interrupts for us */
- /* NOTE: ensure that the WDRF flag is unset in the MCUSR or we will spinlock
- * when the watchdog times out
- */
- MCUSR &= ~(1 << WDRF);
- wdt_disable();
-
- /* init the USART */
- zigduino_init_uart0();
-
- /* set the LED as an output */
- PLEDDIR |= (1 << PLEDPIN);
- PLEDOUT |= (1 << PLEDPIN);
-
- /* explicitly enable interrupts */
- sei();
-}
+ uint8_t x;
-void
-zigduino_reboot()
-{
- MCUSR &= ~(1 << WDRF);
- wdt_enable(WDTO_15MS);
- while(1)
- _delay_ms(127);
-}
+ /* explicitly clear interrupts */
+ cli();
+
+ /* move the vectors */
+
+ /* move interrupts from boot flash section */
+ /* NB */
+ /* you MUST use a variable during this process. even highly optimized,
+ * masking the bit, shifting, ANDing, and setting MCUCR will exceed
+ * 4 CPU cycles! set a variable with the desired value for MCUCR and
+ * then set the register once IVCE is enabled
+ */
+ x = MCUCR & ~(1 << IVSEL);
+
+ /* enable change of interrupt vectors */
+ /* NOTE: setting IVCE disables interrupts until the bit is auto-unset
+ * 4 cycles after being set or after IVSEL is written
+ */
+ MCUCR |= (1 << IVCE);
+ MCUCR = x;
+
+ /* disable the watchdog timer; this macro will disable interrupts for us */
+ /* NOTE: ensure that the WDRF flag is unset in the MCUSR or we will spinlock
+ * when the watchdog times out
+ */
+ MCUSR &= ~(1 << WDRF);
+ wdt_disable();
+
+ /* init the USART */
+ zigduino_init_uart0();
+
+ /* set the LED as an output */
+ led_init();
+
+ /* enable internal internal pull-up resister
+ in order to supress line noise that prevents
+ bootloader from timing out */
+ SPIDIR &= ~(1 << SPIPIN);
+ SPIOUT |= (1 << SPIPIN);
+
+ /* explicitly enable interrupts */
+ sei();
-void zigduino_init_uart1(){
}
-uint8_t
-zigduino_get_byte(uint16_t v)
+void
+zigduino_reboot()
{
- /* NB */
- /* we are only passed in a 16bit word. should
- * be increased to 32bit if we want to handle
- * far reads as well
- */
-/* XXX should be far on the 1284P, but there are bugs with flash reads using _far */
-/* XXX until the bugs are figured out (probably my fault?) use _near */
- return pgm_read_byte_near(v);
+ MCUSR &= ~(1 << WDRF);
+ wdt_enable(WDTO_15MS);
+ while(1)
+ _delay_ms(127);
}
-int *
+int *
zigduino_ramend(void)
{
- /* NB */
- /* ATmega1284P has 16K SRAM */
- return (int * )0x4000;
+ /* NB */
+ /* ATmega128rfa1 has 16K SRAM */
+ return (int * )0x4000;
}
void
led_toggle(void)
{
- led_on();
- _delay_ms(30);
- led_off();
+ led_on();
+ _delay_ms(30);
+ led_off();
}
-
projects / goodfet / blobdiff