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add API to disable serial padding. (#2145)

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* add API to desiable serial padding.

* renamed api
This commit is contained in:
Peli de Halleux 2019-06-07 14:29:03 -07:00 committed by Abhijith Chatra
parent 9ca5a22106
commit 9eec76410a
1 changed files with 22 additions and 5 deletions
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21
libs/core/serial.ts
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@ -8,6 +8,7 @@ namespace serial {
* The string used to mark a new line, default is \r\n
*/
export let NEW_LINE = "\r\n";
let writeLinePadding = 32;
/**
* Print a line of text to the serial port
@ -19,15 +20,31 @@ namespace serial {
//% text.shadowOptions.toString=true
export function writeLine(text: string): void {
if (!text) text = "";
serial.writeString(text);
// pad data to the 32 byte boundary
// to ensure apps receive the packet
let r = (32 - (text.length + 2) % 32) % 32;
serial.writeString(text);
if (writeLinePadding > 0) {
let r = (writeLinePadding - (text.length + NEW_LINE.length) % writeLinePadding) % writeLinePadding;
for (let i = 0; i < r; ++i)
serial.writeString(" ");
}
serial.writeString(NEW_LINE);
}
/**
* Sets the padding length for lines sent with "write line".
* @param length the number of bytes alignment, eg: 0
*
*/
//% weight=1
//% help=serial/set-write-line-padding
//% blockId=serialWriteNewLinePadding block="serial set write line padding to $length"
//% advanced=true
//% length.min=0 length.max=128
export function setWriteLinePadding(length: number) {
writeLinePadding = length | 0;
}
/**
* Print a numeric value to the serial port
*/