/********************************************************************* * * SEGGER_RTT_WaitKey * * Function description * Waits until at least one character is avaible in the SEGGER RTT buffer. * Once a character is available, it is read and this function returns. * * Return value * >=0 - Character which has been read. * * Notes * (1) This function is only specified for accesses to RTT buffer 0 * (2) This function is blocking if no character is present in RTT buffer */ int SEGGER_RTT_WaitKey(void) { int r; do { r = SEGGER_RTT_GetKey(); } while (r < 0); return r; }
/********************************************************************* * * main */ void main(void) { int r; int CancelOp; do { _Cnt = 0; SEGGER_RTT_WriteString(0, "SEGGER Real-Time-Terminal Sample\r\n"); SEGGER_RTT_WriteString(0, "Press <1> to continue in blocking mode (Application waits if necessary, no data lost)\r\n"); SEGGER_RTT_WriteString(0, "Press <2> to continue in non-blocking mode (Application does not wait, data lost if fifo full)\r\n"); do { r = SEGGER_RTT_WaitKey(); } while ((r != '1') && (r != '2')); if (r == '1') { SEGGER_RTT_WriteString(0, "\r\nSelected <1>. Configuring RTT and starting...\r\n"); SEGGER_RTT_ConfigUpBuffer(0, NULL, NULL, 0, SEGGER_RTT_MODE_BLOCK_IF_FIFO_FULL); } else { SEGGER_RTT_WriteString(0, "\r\nSelected <2>. Configuring RTT and starting...\r\n"); SEGGER_RTT_ConfigUpBuffer(0, NULL, NULL, 0, SEGGER_RTT_MODE_NO_BLOCK_SKIP); } CancelOp = 0; do { //for (_Delay = 0; _Delay < 10000; _Delay++); SEGGER_RTT_printf(0, "Count: %d. Press <Space> to get back to menu.\r\n", _Cnt++); r = SEGGER_RTT_HasKey(); if (r) { CancelOp = (SEGGER_RTT_GetKey() == ' ') ? 1 : 0; } // // Check if user selected to cancel the current operation // if (CancelOp) { SEGGER_RTT_WriteString(0, "Operation cancelled, going back to menu...\r\n"); break; } } while (1); SEGGER_RTT_GetKey(); SEGGER_RTT_WriteString(0, "\r\n"); } while (1); }
//Detect Keystroke int8_t getInput() { int8_t curr_char = SEGGER_RTT_GetKey(); return curr_char; }