Replace uartPrintf() with uartPutInteger() and ...HexByte() because WTF everything is broken

firmware/src/commands.c

@@ -21,7 +21,7 @@ void executeCommand(CommandLine cmdLine) {
     }
     else if (strcmp(cmdLine.command, "HELP") == 0) {
         // HELP command: Print a list of supported commands.
-        commandHelp(cmdLine.arg);
+        commandHelp();
     }
     else if (strcmp(cmdLine.command, "READ") == 0) {
         // READ command: Takes a hex address range (or single address) as argument,
@@ -123,10 +123,13 @@ void commandRead(char* arg) {
             }
         } else {
             // Fancy ASCII output
-            uartPrintf("<%d>", buffer.bytes);
+            uartPutChar('<');
+            uartPutInteger(buffer.bytes);
+            uartPutChar('>');
 
             for (int i = 0; i < buffer.bytes; i++) {
-                uartPrintf(" %02X", buffer.data[i]);
+                uartPutChar(' ');
+                uartPutHexByte(buffer.data[i]);
             }
             uartPutLine(NULL);
         }
@@ -163,8 +166,10 @@ void commandErase() {
 void commandTestRead() {
     eepromSetReadMode();
 
-    for (int i = 0x00; i < 0x20; i++) {
-        uartPrintf("TESTREAD 0x%02X: ", i);
+    for (uint8_t i = 0x00; i < 0x20; i++) {
+        uartPutString("TESTREAD 0x");
+        uartPutHexByte(i);
+        uartPutString(": ");
 
         uint8_t byte = eepromReadByte(i);
 
@@ -174,7 +179,9 @@ void commandTestRead() {
             uartPutChar('?');
         }
 
-        uartPrintf(" (0x%02X)\n");
+        uartPutString(" (0x");
+        uartPutHexByte(byte);
+        uartPutLine(")");
     }
 }
 

firmware/src/uart.c

@@ -56,17 +56,18 @@ void uartPutLine(char* data) {
     uartPutChar('\n');
 }
 
-// Transmit a sprintf formatted string (maximum buffer: 256 bytes!)
-void uartPrintf(const char* format, ...) {
-    char outBuffer[256];
-
-    va_list args;
-    va_start(args, format);
-
-    vsprintf(outBuffer, format, args);
+// Convert an integer to decimal ASCII and transmit
+void uartPutInteger(int value) {
+    char outBuffer[32];
+    snprintf(outBuffer, 32, "%d", value);
     uartPutString(outBuffer);
+}
 
-    va_end(args);
+// Convert a byte to hexadecimal ASCII and transmit
+void uartPutHexByte(uint8_t byte) {
+    char outBuffer[8];
+    snprintf(outBuffer, 8, "%02hhX", byte);
+    uartPutString(outBuffer);
 }
 
 // Receive a single character (blocking)

firmware/src/uart.h

@@ -16,8 +16,11 @@ void uartPutString(char* data);
 // Transmit a string followed by a line break
 void uartPutLine(char* data);
 
-// Transmit a sprintf formatted string (maximum buffer: 256 bytes!)
-void uartPrintf(const char* format, ...);
+// Convert an integer to decimal ASCII and transmit
+void uartPutInteger(int value);
+
+// Convert a byte to hexadecimal ASCII and transmit
+void uartPutHexByte(uint8_t byte);
 
 // Read a single character (blocking)
 unsigned char uartGetChar();