112 lines
2.7 KiB
C
112 lines
2.7 KiB
C
#include "ets_sys.h"
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#include "os_type.h"
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#include "osapi.h"
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#include "driver/uart.h"
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#include "c_types.h"
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LOCAL os_timer_t readline_timer;
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// UartDev is defined and initialized in rom code.
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extern UartDevice UartDev;
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#define uart_putc uart0_putc
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bool uart_getc(char *c){
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RcvMsgBuff *pRxBuff = &(UartDev.rcv_buff);
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if(pRxBuff->pWritePos == pRxBuff->pReadPos){ // empty
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return false;
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}
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// ETS_UART_INTR_DISABLE();
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ETS_INTR_LOCK();
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*c = (char)*(pRxBuff->pReadPos);
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if (pRxBuff->pReadPos == (pRxBuff->pRcvMsgBuff + RX_BUFF_SIZE)) {
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pRxBuff->pReadPos = pRxBuff->pRcvMsgBuff ;
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} else {
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pRxBuff->pReadPos++;
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}
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// ETS_UART_INTR_ENABLE();
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ETS_INTR_UNLOCK();
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return true;
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}
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#if 0
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int readline4lua(const char *prompt, char *buffer, int length){
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char ch;
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int line_position;
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start:
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/* show prompt */
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uart0_sendStr(prompt);
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line_position = 0;
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os_memset(buffer, 0, length);
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while (1)
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{
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while (uart_getc(&ch))
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{
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/* handle CR key */
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if (ch == '\r')
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{
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char next;
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if (uart_getc(&next))
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ch = next;
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}
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/* backspace key */
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else if (ch == 0x7f || ch == 0x08)
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{
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if (line_position > 0)
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{
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uart_putc(0x08);
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uart_putc(' ');
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uart_putc(0x08);
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line_position--;
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}
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buffer[line_position] = 0;
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continue;
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}
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/* EOF(ctrl+d) */
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else if (ch == 0x04)
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{
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if (line_position == 0)
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/* No input which makes lua interpreter close */
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return 0;
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else
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continue;
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}
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/* end of line */
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if (ch == '\r' || ch == '\n')
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{
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buffer[line_position] = 0;
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uart_putc('\n');
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if (line_position == 0)
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{
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/* Get a empty line, then go to get a new line */
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goto start;
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}
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else
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{
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return line_position;
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}
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}
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/* other control character or not an acsii character */
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if (ch < 0x20 || ch >= 0x80)
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{
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continue;
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}
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/* echo */
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uart_putc(ch);
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buffer[line_position] = ch;
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ch = 0;
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line_position++;
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/* it's a large line, discard it */
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if (line_position >= length)
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line_position = 0;
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}
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}
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}
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#endif
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