Demo using input to set 3-bit led colour

demo.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
 set -e
-rm -f demo/*.o demo/*.d demo/demo.bin demo/demo.elf demo/demo.elf.map
 python3 demo/demo.py --build-path build/gsd_orangecrab/ --with-cxx
+rm -f demo/*.o demo/*.d demo/demo.bin demo/demo.elf demo/demo.elf.map && echo "Cleaned up build artifacts"
 rm -f /mnt/c/Users/suple/Desktop/dfu-util-0.9-win64/gsd.bin && echo "Deleted old Win11 BIN"
 mv demo.bin /mnt/c/Users/suple/Desktop/dfu-util-0.9-win64/gsd.bin && echo "Moved new BIN to Win11 Desktop"

demo/Makefile

@@ -5,7 +5,7 @@ include $(SOC_DIRECTORY)/software/common.mak
 
 OBJECTS   = donut.o helloc.o crt0.o main.o
 ifdef WITH_CXX
-	OBJECTS += hellocpp.o
+	OBJECTS += hellocpp.o leds.o
 	CFLAGS += -DWITH_CXX
 endif
 

demo/leds.cpp

@@ -0,0 +1,7 @@
+#include <generated/csr.h>
+#include <stdio.h>
+
+extern "C" void leds(int);
+void leds(int v) {
+	leds_out_write(v);
+}

demo/main.c

@@ -5,28 +5,27 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include <irq.h>
-#include <libbase/uart.h>
-#include <libbase/console.h>
 #include <generated/csr.h>
+#include <irq.h>
+#include <libbase/console.h>
+#include <libbase/uart.h>
 
 /*-----------------------------------------------------------------------*/
 /* Uart                                                                  */
 /*-----------------------------------------------------------------------*/
 
-static char *readstr(void)
-{
+static char *readstr(void) {
 	char c[2];
 	static char s[64];
 	static int ptr = 0;
 
-	if(readchar_nonblock()) {
+	if (readchar_nonblock()) {
 		c[0] = getchar();
 		c[1] = 0;
-		switch(c[0]) {
+		switch (c[0]) {
 			case 0x7f:
 			case 0x08:
-				if(ptr > 0) {
+				if (ptr > 0) {
 					ptr--;
 					fputs("\x08 \x08", stdout);
 				}
@@ -40,7 +39,7 @@ static char *readstr(void)
 				ptr = 0;
 				return s;
 			default:
-				if(ptr >= (sizeof(s) - 1))
+				if (ptr >= (sizeof(s) - 1))
 					break;
 				fputs(c, stdout);
 				s[ptr] = c[0];
@@ -52,34 +51,33 @@ static char *readstr(void)
 	return NULL;
 }
 
-static char *get_token(char **str)
-{
+static char *get_token(char **str) {
 	char *c, *d;
 
 	c = (char *)strchr(*str, ' ');
-	if(c == NULL) {
+	if (c == NULL) {
 		d = *str;
-		*str = *str+strlen(*str);
+		*str = *str + strlen(*str);
 		return d;
 	}
 	*c = 0;
 	d = *str;
-	*str = c+1;
+	*str = c + 1;
 	return d;
 }
 
-static void prompt(void)
-{
-	printf("\e[92;1mlitex-demo-app\e[0m> ");
+static void prompt(void) {
+	printf("\e[92;1mStackSynth\e[0m> ");
 }
 
 /*-----------------------------------------------------------------------*/
 /* Help                                                                  */
 /*-----------------------------------------------------------------------*/
 
-static void help(void)
-{
-	puts("\nLiteX minimal demo app built "__DATE__" "__TIME__"\n");
+static void help(void) {
+	puts("\nLiteX custom demo app built "__DATE__
+		 " "__TIME__
+		 "\n");
 	puts("Available commands:");
 	puts("help               - Show this command");
 	puts("reboot             - Reboot CPU");
@@ -90,6 +88,9 @@ static void help(void)
 	puts("helloc             - Hello C");
 #ifdef WITH_CXX
 	puts("hellocpp           - Hello C++");
+#ifdef CSR_LEDS_BASE
+	puts("leds               - Led set demo");
+#endif
 #endif
 }
 
@@ -97,35 +98,38 @@ static void help(void)
 /* Commands                                                              */
 /*-----------------------------------------------------------------------*/
 
-static void reboot_cmd(void)
-{
+static void reboot_cmd(void) {
 	ctrl_reset_write(1);
 }
 
 #ifdef CSR_LEDS_BASE
-static void led_cmd(void)
-{
+static void led_cmd(void) {
 	int i;
+	int j;
 	printf("Led demo...\n");
 
 	printf("Counter mode...\n");
-	for(i=0; i<32; i++) {
+	for (i = 0; i < 128; i++) {
 		leds_out_write(i);
 		busy_wait(100);
 	}
 
 	printf("Shift mode...\n");
-	for(i=0; i<4; i++) {
-		leds_out_write(1<<i);
+	for (j = 0; j < 4; j++) {
+		for (i = 0; i < 4; i++) {
+			leds_out_write(1 << i);
 			busy_wait(200);
 		}
-	for(i=0; i<4; i++) {
-		leds_out_write(1<<(3-i));
+	}
+	for (j = 0; j < 4; j++) {
+		for (i = 0; i < 4; i++) {
+			leds_out_write(1 << (3 - i));
 			busy_wait(200);
 		}
+	}
 
 	printf("Dance mode...\n");
-	for(i=0; i<4; i++) {
+	for (i = 0; i < 16; i++) {
 		leds_out_write(0x55);
 		busy_wait(200);
 		leds_out_write(0xaa);
@@ -134,18 +138,28 @@ static void led_cmd(void)
 }
 #endif
 
+#ifdef WITH_CXX
+#ifdef CSR_LEDS_BASE
+extern void leds(int);
+
+static void leds_cmd(char **val) {
+	int value = (int)strtol(get_token(val), NULL, 0);
+	printf("Setting LED to %6x\n", value);
+	leds(value);
+}
+#endif
+#endif
+
 extern void donut(void);
 
-static void donut_cmd(void)
-{
+static void donut_cmd(void) {
 	printf("Donut demo...\n");
 	donut();
 }
 
 extern void helloc(void);
 
-static void helloc_cmd(void)
-{
+static void helloc_cmd(void) {
 	printf("Hello C demo...\n");
 	helloc();
 }
@@ -153,8 +167,7 @@ static void helloc_cmd(void)
 #ifdef WITH_CXX
 extern void hellocpp(void);
 
-static void hellocpp_cmd(void)
-{
+static void hellocpp_cmd(void) {
 	printf("Hello C++ demo...\n");
 	hellocpp();
 }
@@ -164,35 +177,38 @@ static void hellocpp_cmd(void)
 /* Console service / Main                                                */
 /*-----------------------------------------------------------------------*/
 
-static void console_service(void)
-{
+static void console_service(void) {
 	char *str;
 	char *token;
 
 	str = readstr();
-	if(str == NULL) return;
+	if (str == NULL)
+		return;
 	token = get_token(&str);
-	if(strcmp(token, "help") == 0)
+	if (strcmp(token, "help") == 0)
 		help();
-	else if(strcmp(token, "reboot") == 0)
+	else if (strcmp(token, "reboot") == 0)
 		reboot_cmd();
 #ifdef CSR_LEDS_BASE
-	else if(strcmp(token, "led") == 0)
+	else if (strcmp(token, "led") == 0)
 		led_cmd();
 #endif
-	else if(strcmp(token, "donut") == 0)
+	else if (strcmp(token, "donut") == 0)
 		donut_cmd();
-	else if(strcmp(token, "helloc") == 0)
+	else if (strcmp(token, "helloc") == 0)
 		helloc_cmd();
 #ifdef WITH_CXX
-	else if(strcmp(token, "hellocpp") == 0)
+#ifdef CSR_LEDS_BASE
+	else if (strcmp(token, "hellocpp") == 0)
 		hellocpp_cmd();
+	else if (strcmp(token, "leds") == 0)
+		leds_cmd(&str);
+#endif
 #endif
 	prompt();
 }
 
-int main(void)
-{
+int main(void) {
 #ifdef CONFIG_CPU_HAS_INTERRUPT
 	irq_setmask(0);
 	irq_setie(1);
@@ -202,9 +218,7 @@ int main(void)
 	help();
 	prompt();
 
-	while(1) {
+	while (1) {
 		console_service();
 	}
-
-	return 0;
 }