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Updated port for BACnet Development Kit.

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This commit is contained in:
skarg
2009-05-11 22:32:06 +00:00
parent be4b33c099
commit 469627a6cf
28 changed files with 1758 additions and 211 deletions
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bacnet-stack/ports/bdk-atxx4-mstp/rs485.c
+58 -6
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@@ -28,6 +28,7 @@
#include "fifo.h"
#include "timer.h"
#include "led.h"
#include "nvdata.h"
/* baud rate */
static uint32_t Baud_Rate = 9600;
@@ -152,10 +153,19 @@ uint32_t rs485_baud_rate(
return Baud_Rate;
}
static void rs485_baud_rate_configure(void)
{
/* 2x speed mode */
BIT_SET(UCSR0A, U2X0);
/* configure baud rate */
UBRR0 = (F_CPU / (8UL * Baud_Rate)) - 1;
}
bool rs485_baud_rate_set(
uint32_t baud)
{
bool valid = true;
uint8_t baud_k = 0;
switch (baud) {
case 9600:
@@ -165,11 +175,13 @@ bool rs485_baud_rate_set(
case 76800:
case 115200:
Baud_Rate = baud;
/* 2x speed mode */
BIT_SET(UCSR0A, U2X0);
/* configure baud rate */
UBRR0 = (F_CPU / (8UL * Baud_Rate)) - 1;
/* FIXME: store the baud rate */
rs485_baud_rate_configure();
/* store the baud rate */
baud_k = baud/1000;
eeprom_bytes_write(
NV_EEPROM_BAUD_K,
&baud_k,
1);
break;
default:
valid = false;
@@ -195,13 +207,53 @@ static void rs485_usart_init(void)
BIT_CLEAR(PRR, PRUSART0);
}
static void rs485_init_nvdata(void)
{
uint8_t baud_k = 9; /* from EEPROM value */
eeprom_bytes_read(
NV_EEPROM_BAUD_K,
&baud_k,
1);
switch (baud_k) {
case 9:
Baud_Rate = 9600;
break;
case 19:
Baud_Rate = 19200;
break;
case 38:
Baud_Rate = 38400;
break;
case 57:
Baud_Rate = 57600;
break;
case 76:
Baud_Rate = 76800;
break;
case 115:
Baud_Rate = 115200;
break;
default:
/* not configured yet */
Baud_Rate = 38400;
baud_k = 38400/1000;
eeprom_bytes_write(
NV_EEPROM_BAUD_K,
&baud_k,
1);
break;
}
rs485_baud_rate_configure();
}
void rs485_init(void)
{
FIFO_Init(&Receive_Buffer, &Receive_Buffer_Data[0],
(unsigned)sizeof(Receive_Buffer_Data));
rs485_rts_init();
rs485_usart_init();
rs485_baud_rate_set(Baud_Rate);
rs485_init_nvdata();
rs485_receiver_enable();
rs485_rts_enable(false);
}