Switch from stdio to direct TinyUSB CDC, drop cstdio from w6300

picomap.cpp

@@ -1,16 +1,28 @@
-#include <stdio.h>
 #include "pico/stdlib.h"
 #include "pico/bootrom.h"
 #include "pico/unique_id.h"
+#include "tusb.h"
 #include "wire.h"
 
 #include "w6300.h"
 
-static void send_bytes(const std::vector<uint8_t> &data) {
-    for (auto b : data) {
-        putchar(b);
+static void usb_write(const uint8_t* data, uint32_t len) {
+    while (len > 0) {
+        uint32_t avail = tud_cdc_write_available();
+        if (avail == 0) {
+            tud_task();
+            continue;
+        }
+        uint32_t chunk = len < avail ? len : avail;
+        tud_cdc_write(data, chunk);
+        tud_cdc_write_flush();
+        data += chunk;
+        len -= chunk;
     }
-    stdio_flush();
+}
+
+static void send_bytes(const std::vector<uint8_t> &data) {
+    usb_write(data.data(), data.size());
 }
 
 static bool w6300_init() {
@@ -35,20 +47,22 @@ static bool w6300_init() {
 }
 
 int main() {
-    stdio_init_all();
-    stdio_set_translate_crlf(&stdio_usb, false);
+    tusb_init();
 
     if (!w6300_init()) {
-        printf("W6300 init failed\n");
     }
 
     static static_vector<uint8_t, 256> rx_buf;
 
     while (true) {
-        int c = getchar_timeout_us(100000);
-        if (c == PICO_ERROR_TIMEOUT) continue;
+        tud_task();
 
-        rx_buf.push_back(static_cast<uint8_t>(c));
+        if (!tud_cdc_available()) continue;
+
+        uint8_t byte;
+        if (tud_cdc_read(&byte, 1) != 1) continue;
+
+        rx_buf.push_back(byte);
 
         auto msg = try_decode(rx_buf);
         if (!msg) {