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Refactoring and minor cleanup of RNG applet.

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This commit is contained in:
Travis Goodspeed 2018-07-26 18:33:55 -04:00
parent 21da7246ca
commit 22b1e6ce10
1 changed files with 18 additions and 15 deletions
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33
firmware/apps/rngapp.c
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@ -1,11 +1,11 @@
/*! \file rngapp.c /*! \file rngapp.c
\brief Demo random number generator app \brief Demo random number generator app
This app will display random numbers on the display. This app will display random numbers.
Press 0 to generate a new random number Press 0 to generate a new random number.
Press 7 to diaply it in hexadecimal Press 7 to display it in hexadecimal.
Press / to display it in decimal Press / to display it in decimal.
*/ */
#include <stdio.h> #include <stdio.h>
@ -16,7 +16,7 @@
enum rng_disp_format_enum {DECIMAL, HEX}; enum rng_disp_format_enum {DECIMAL, HEX};
enum rng_disp_format_enum rng_disp_format; enum rng_disp_format_enum rng_disp_format;
static unsigned int last_num = 0; static unsigned int num = 0, last_num = 0;
//! Enter the rng tool. //! Enter the rng tool.
void rngapp_init(){ void rngapp_init(){
@ -24,7 +24,7 @@ void rngapp_init(){
} }
//! Exit the rng tool. //! Exit the rng tool.
int rngapp_exit(){ int rngapp_exit(){
last_num = 0; //leave only your footprints! num = last_num = 0; //leave only your footprints!
return 0; return 0;
} }
@ -32,29 +32,32 @@ int rngapp_exit(){
int rngapp_keypress(char ch){ int rngapp_keypress(char ch){
switch(ch){ switch(ch){
case '0': case '0':
last_num = true_rand(); num = true_rand();
break; break;
case '7': case '7':
rng_disp_format = HEX; rng_disp_format = HEX;
last_num=0; //Dump old number to reconvert.
break; break;
case '/': case '/':
rng_disp_format = DECIMAL; rng_disp_format = DECIMAL;
last_num=0; //Dump old number to reconvert.
break; break;
} }
return 1; //Redraw. return 1; //Redraw.
} }
//! Draw the screen //! Draw the screen, only if the number has changed.
void rngapp_draw(){ void rngapp_draw(){
lcd_string(" "); if (!num) {
if (!last_num) {
lcd_string("press 0 "); lcd_string("press 0 ");
} else { } else if (num!=last_num) {
last_num=num;
lcd_string(" ");
if (rng_disp_format == DECIMAL) { if (rng_disp_format == DECIMAL) {
lcd_number(last_num); lcd_number(num);
} else { } else {
lcd_hex(last_num); lcd_hex(num);
} }
} }
} }