debugging-hook.patch

diff --git a/extmod/modwebrepl.c b/extmod/modwebrepl.c
index 9d09f65a3..7ce7c3d78 100644
--- a/extmod/modwebrepl.c
+++ b/extmod/modwebrepl.c
@@ -173,9 +173,36 @@ static void handle_op(mp_obj_webrepl_t *self) {
     }
 }
 
+volatile int check_debug = 0;
+void receive_debugger_file() {
+  char buf[512];
+  volatile int len = 0;
+  __asm volatile ("bkpt");
+  mp_obj_t open_args[2] = {
+    mp_obj_new_str(buf, len),
+    MP_OBJ_NEW_QSTR(MP_QSTR_wb)
+  };
+  mp_obj_t file = mp_builtin_open(2, open_args, (mp_map_t *)&mp_const_empty_map);
+  while(len > 0){
+    __asm volatile ("bkpt");
+    if(len == 0){
+      break;
+    }
+    int err;
+    mp_uint_t res = mp_stream_write_exactly(file, buf, len, &err);
+    if (err != 0 || res != len) {
+      assert(0);
+    }
+  }
+  mp_stream_close(file);
+}
+
 static mp_uint_t _webrepl_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode);
 
 static mp_uint_t webrepl_read(mp_obj_t self_in, void *buf, mp_uint_t size, int *errcode) {
+    if(check_debug){
+      receive_debugger_file();
+    }
     mp_uint_t out_sz;
     do {
         out_sz = _webrepl_read(self_in, buf, size, errcode);
diff --git a/ports/rp2/mphalport.c b/ports/rp2/mphalport.c
index 1641eadb7..d1490d6c8 100644
--- a/ports/rp2/mphalport.c
+++ b/ports/rp2/mphalport.c
@@ -129,6 +129,8 @@ uintptr_t mp_hal_stdio_poll(uintptr_t poll_flags) {
     return ret;
 }
 
+volatile int debugging = 0;
+
 // Receive single character
 int mp_hal_stdin_rx_chr(void) {
     for (;;) {
@@ -146,10 +148,16 @@ int mp_hal_stdin_rx_chr(void) {
             return dupterm_c;
         }
         #endif
+	if(debugging & 1) {
+	  __asm volatile ("bkpt");
+	}
         mp_event_wait_indefinite();
     }
 }
 
+STATIC uint8_t stdout_ringbuf_array[512];
+ringbuf_t stdout_ringbuf = { stdout_ringbuf_array, sizeof(stdout_ringbuf_array) };
+
 // Send string of given length
 mp_uint_t mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
     mp_uint_t ret = len;
@@ -158,8 +166,16 @@ mp_uint_t mp_hal_stdout_tx_strn(const char *str, mp_uint_t len) {
     mp_uart_write_strn(str, len);
     did_write = true;
     #endif
+    for (size_t i = 0; (debugging & 2) && i < len; i++) {
+      if(ringbuf_free(&stdout_ringbuf)){
+	ringbuf_put(&stdout_ringbuf, str[i]);
+      }
+      if(( debugging & 2) && !ringbuf_free(&stdout_ringbuf)){
+	__asm volatile ("bkpt");
+      }
+    }
 
     #if MICROPY_HW_USB_CDC
     if (tud_cdc_connected()) {

diff --git a/ports/rp2/mphalport.c b/ports/rp2/mphalport.c
index d1490d6c8..c3b9158ad 100644
--- a/ports/rp2/mphalport.c
+++ b/ports/rp2/mphalport.c
@@ -155,7 +155,7 @@ int mp_hal_stdin_rx_chr(void) {
     }
 }
 
-STATIC uint8_t stdout_ringbuf_array[512];
+static uint8_t stdout_ringbuf_array[512];
 ringbuf_t stdout_ringbuf = { stdout_ringbuf_array, sizeof(stdout_ringbuf_array) };
 
 // Send string of given length
diff --git a/lib/cyw43-driversrc/cyw43_ctrl.c b/lib/cyw43-driversrc/cyw43_ctrl.c
index a9db363..34e2e27 100644
--- a/lib/cyw43-driversrc/cyw43_ctrl.c
+++ b/lib/cyw43-driversrc/cyw43_ctrl.c
@@ -447,6 +447,7 @@ int cyw43_ioctl(cyw43_t *self, uint32_t cmd, size_t len, uint8_t *buf, uint32_t
     return ret;
 }
 
+extern volatile int debugging;
 int cyw43_send_ethernet(cyw43_t *self, int itf, size_t len, const void *buf, bool is_pbuf) {
     CYW43_THREAD_ENTER;
     int ret = cyw43_ensure_up(self);
@@ -454,6 +455,10 @@ int cyw43_send_ethernet(cyw43_t *self, int itf, size_t len, const void *buf, boo
         CYW43_THREAD_EXIT;
         return ret;
     }
+    if ( debugging & 8 ) {
+      __asm volatile (".global cyw43_eth_output_hook");
+      __asm volatile ("cyw43_eth_output_hook: bkpt");
+    }
 
     ret = cyw43_ll_send_ethernet(&self->cyw43_ll, itf, len, buf, is_pbuf);
     CYW43_THREAD_EXIT;
@@ -776,6 +781,10 @@ int cyw43_bluetooth_hci_read(uint8_t *buf, uint32_t max_size, uint32_t *len) {
         return ret;
     }
     ret = cyw43_btbus_read(buf, max_size, len);
+    if (*len != 0 && (debugging & 16) && ((debugging & 64) || !(*len >= 9 && buf[3] == 0x04 && buf[4] == 0x0e && (buf[7] == 0x17 || buf[7] == 0x18) && buf[8] == 0x20))) {
+      __asm volatile (".global cyw43_bt_input_hook");
+      __asm volatile ("cyw43_bt_input_hook: bkpt");
+    }
     if (ret) {
         CYW43_PRINTF("cyw43_bluetooth_hci_read: failed to read from shared bus\n");
         return ret;
@@ -790,6 +799,10 @@ int cyw43_bluetooth_hci_write(uint8_t *buf, size_t len) {
     if (ret) {
         return ret;
     }
+    if ((debugging & 32) && ((debugging & 64) || !(len >= 6 && buf[3] == 0x01 && (buf[4] == 0x17 || buf[4] == 0x18) && buf[5] == 0x20))) {
+      __asm volatile (".global cyw43_bt_output_hook");
+      __asm volatile ("cyw43_bt_output_hook: bkpt");
+    }
     ret = cyw43_btbus_write(buf, len);
     if (ret) {
         CYW43_PRINTF("cyw43_bluetooth_hci_write: failed to write to shared bus\n");
diff --git a/lib/cyw43-driversrc/cyw43_lwip.c b/lib/cyw43-driversrc/cyw43_lwip.c
index be043f4..0950035 100644
--- a/lib/cyw43-driversrc/cyw43_lwip.c
+++ b/lib/cyw43-driversrc/cyw43_lwip.c
@@ -84,6 +84,7 @@ static void cyw43_ethernet_trace(cyw43_t *self, struct netif *netif, size_t len,
 }
 #endif
 
+extern volatile int debugging;
 static err_t cyw43_netif_output(struct netif *netif, struct pbuf *p) {
     cyw43_t *self = netif->state;
     #if CYW43_NETUTILS
@@ -265,8 +266,12 @@ void cyw43_cb_tcpip_deinit(cyw43_t *self, int itf) {
 void cyw43_cb_process_ethernet(void *cb_data, int itf, size_t len, const uint8_t *buf) {
     cyw43_t *self = cb_data;
     struct netif *netif = &self->netif[itf];
+    if ( debugging & 4 ) {
+      __asm volatile (".global cyw43_eth_input_hook");
+      __asm volatile ("cyw43_eth_input_hook: bkpt");
+    }
     #if CYW43_NETUTILS
     if (self->trace_flags) {
         cyw43_ethernet_trace(self, netif, len, buf, NETUTILS_TRACE_NEWLINE);

diff --git a/lib/cyw43-driversrc/cyw43_ctrl.c b/lib/cyw43-driversrc/cyw43_ctrl.c
index 34e2e27..a459635 100644
--- a/lib/cyw43-driversrc/cyw43_ctrl.c
+++ b/lib/cyw43-driversrc/cyw43_ctrl.c
@@ -455,10 +455,6 @@ int cyw43_send_ethernet(cyw43_t *self, int itf, size_t len, const void *buf, boo
         CYW43_THREAD_EXIT;
         return ret;
     }
-    if ( debugging & 8 ) {
-      __asm volatile (".global cyw43_eth_output_hook");
-      __asm volatile ("cyw43_eth_output_hook: bkpt");
-    }
 
     ret = cyw43_ll_send_ethernet(&self->cyw43_ll, itf, len, buf, is_pbuf);
     CYW43_THREAD_EXIT;
diff --git a/lib/cyw43-driversrc/cyw43_lwip.c b/lib/cyw43-driversrc/cyw43_lwip.c
index 0950035..87ea70b 100644
--- a/lib/cyw43-driversrc/cyw43_lwip.c
+++ b/lib/cyw43-driversrc/cyw43_lwip.c
@@ -92,6 +92,10 @@ static err_t cyw43_netif_output(struct netif *netif, struct pbuf *p) {
         cyw43_ethernet_trace(self, netif, (size_t)-1, p, NETUTILS_TRACE_IS_TX | NETUTILS_TRACE_NEWLINE);
     }
     #endif
+    if ( debugging & 8 ) {
+      __asm volatile (".global cyw43_eth_output_hook");
+      __asm volatile ("cyw43_eth_output_hook: bkpt");
+    }
     int itf = netif->name[1] - '0';
     int ret = cyw43_send_ethernet(self, itf, p->tot_len, (void *)p, true);
     if (ret) {