Read carefully the C-language program in your course handouts (page 127-129). In this program, you are told how to set various serial port parameters. Based on the knowledge you gain here, answer the following by writing appropriate C-language instruction with single line comments to achieve stated task.
| S.No. | Task | C-Language Instruction with single line comments | |
| 1 | Write a single line of code to set the com pointer variable to COM port 3. | outportb ((*com)+3) | |
| 2 | Write a single line of code to set the size of Word Length to 8-bits to be used in serial communication for data transmission. | outportb ((*com)+3,0×03) | |
| 3 | Write a single line of code to set the size of Stop bits equals 3 in serial port communication. | In serial communication we cannot sets stop bit to 3.Only we can set stop bit 1 or 1.5 or 2 through setting. | |
| 4 | Write a single line of code to turn ON the parity bit and use Even parity. |
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| 5 | In the following piece of code, the Baud rate being used is 1200. Modify it in a way such that we shall have Baud Rate of 2400.
outportb ((*com)+3,inport((*com)+3)|0×80); outportb ( (*com),0×60); outportb( (*com) +1, 0×00); |
