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Tagged: microcontroller, PIC, USB to UART
- This topic has 3 replies, 2 voices, and was last updated 9 years, 4 months ago by Ligo George.
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October 25, 2013 at 11:59 am #7540rahulo0Participant
Hello There,
I am trying to send a message from pc to pic16f877a and want to display it on lcd. But problem is that no matter the message length that i am sending from pc ,i am able to receive and display only 2 characters on lcd. I am sending you the code. Looking forward for a reply. By the way i am using mikroC for writing the code.
Thank you,
rahul/*/ LCD module connections*/
sbit LCD_RS at RB7_bit;
sbit LCD_EN at RB6_bit;
sbit LCD_D4 at RB5_bit;
sbit LCD_D5 at RB4_bit;
sbit LCD_D6 at RB3_bit;
sbit LCD_D7 at RB2_bit;sbit LCD_RS_Direction at TRISB7_bit;
sbit LCD_EN_Direction at TRISB6_bit;
sbit LCD_D4_Direction at TRISB5_bit;
sbit LCD_D5_Direction at TRISB4_bit;
sbit LCD_D6_Direction at TRISB3_bit;
sbit LCD_D7_Direction at TRISB2_bit;
// End LCD module connections
unsigned char uart_rd;
int i;
void main() {uart1_init(9600);
delay_ms(100);
Lcd_Init(); // Initialize LcdLcd_Cmd(_LCD_CLEAR); // Clear display
Lcd_Cmd(_LCD_CURSOR_OFF);
while(1){
if(uart1_data_ready()==1){
delay_ms(100);
uart_rd=uart1_read();
lcd_chr_cp(uart_rd);
}}
}October 28, 2013 at 9:40 am #7544Ligo GeorgeKeymasterI also experienced this problem, while using uart and wifi module… I think this problem is due to less buffering space in pic microcontroller…there is only one RSR register for saving the received data…. So if the received data is not read, no data will be received further…
So try transmitting byte by byte..October 28, 2013 at 11:13 am #7547rahulo0ParticipantThanks Ligo
can you please program it in mikroc and send the codes ?October 28, 2013 at 1:57 pm #7548Ligo GeorgeKeymasterTry it yourself.. it is simple…
When sending data from PC to PIC.. send it byte by byte…… If you need to send a sentence…
just transmit and receive byte by byte… and you can use a terminator (eg: ‘.’ for the end of a sentence) to know the end of a sentence….PIC Microcontroller also has interrupt feature… you may use it, to reducing the continuous uart reading load ….
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