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Tuned the ATmega168 port demo project that runs a Device Object and 9 Analog Inputs, and uses ReadProperty service. Uses 16158 bytes of flash, 624 bytes of RAM with an APDU of 128.

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This commit is contained in:
skarg
2007-10-16 01:22:12 +00:00
parent cbefb47a05
commit f70e80f146
7 changed files with 36 additions and 83 deletions
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bacnet-stack/ports/atmega168/dlmstp.c
+12 -8
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@@ -402,7 +402,8 @@ static void MSTP_Send_Frame(
{ /* number of bytes of data (up to 501) */
uint8_t crc8 = 0xFF; /* used to calculate the crc value */
uint16_t crc16 = 0xFFFF; /* used to calculate the crc value */
uint8_t buffer[8]; /* stores the header and data crc */
uint8_t buffer[8]; /* stores the header and crc */
uint8_t datacrc[2]; /* stores the data crc */
uint16_t i = 0; /* used to calculate CRC for data */
/* create the MS/TP header */
@@ -419,10 +420,6 @@ static void MSTP_Send_Frame(
buffer[6] = data_len % 256;
crc8 = CRC_Calc_Header(buffer[6], crc8);
buffer[7] = ~crc8;
RS485_Turnaround_Delay();
RS485_Transmitter_Enable(true);
RS485_Send_Data(buffer,8);
/* send any data */
if (data_len) {
/* calculate CRC for any data */
for (i = 0; i < data_len; i++)
@@ -430,10 +427,17 @@ static void MSTP_Send_Frame(
crc16 = CRC_Calc_Data(data[i], crc16);
}
crc16 = ~crc16;
buffer[0] = (crc16 & 0x00FF);
buffer[1] = ((crc16 & 0xFF00) >> 8);
datacrc[0] = (crc16 & 0x00FF);
datacrc[1] = ((crc16 & 0xFF00) >> 8);
}
/* now transmit the frame */
RS485_Turnaround_Delay();
RS485_Transmitter_Enable(true);
RS485_Send_Data(buffer,8);
/* send any data */
if (data_len) {
RS485_Send_Data(data, data_len);
RS485_Send_Data(buffer, 2);
RS485_Send_Data(datacrc, 2);
}
RS485_Transmitter_Enable(false);
}