Posted on November 07, 2013 at 21:15
Thanks for replying, Clive, but how would I send a 9 bit character through the UART? Maybe I'm missing something that's really easy, but I can't think of it.
What I need is to send a message like this:
Hex, Binary, Decimal equivalents:
0x115 0b100010101 277 (this is really 21 with a mark parity set)
0x002 0b000000010 2
0x000 0b000000000 0
0x03b 0b000111011 59
0x000 0b000000000 0
0x000 0b000000000 0
0x000 0b000000000 0
0x052 0b001010010 82
so you see, first byte has mark parity(MSB) while all others are space. Just before sending the first byte, I tried to set the UART to 8N2 which should be the equivalent of a mark parity, then set it back to 9N1 before sending the rest of the bytes, but it doesn't seem to change anything. It still sends without making the MSB a 1 for the first byte. Here is my code:
uint8_t Message[0] = 21;
uint8_t Message[1] = 2;
uint8_t Message[2] = 0;
uint8_t Message[3] = 59;
uint8_t Message[4] = 0;
uint8_t Message[5] = 0;
uint8_t Message[6] = 0;
uint8_t Message[7] = 82
//set USART3 to 8N2 before sending first byte
USART_InitStructure.USART_WordLength = USART_WordLength_8b;
USART_InitStructure.USART_StopBits = USART_StopBits_2;
USART_Init(USART3, &USART_InitStructure);
//send first byte
while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) ==RESET);
USART_SendData(USART3, Message[0]);
//set USART3 back to 9N1
USART_InitStructure.USART_WordLength = USART_WordLength_9b;
USART_InitStructure.USART_StopBits = USART_StopBits_1;
USART_Init(USART3, &USART_InitStructure);
for (i = 1; i < 8;i++)
{
while(USART_GetFlagStatus(USART3, USART_FLAG_TXE) == RESET);
USART_SendData(USART3, From_MATE_Message[i]);
}
Thanks,
Devyn
