atmel-samd: Port baudrate reset to asf4 so we no longer hose Rosie.

tannewt · tannewt · commit 8466d760f999 · 2017-09-27T21:58:54.000-04:00
We still won't be able to run tests but we will be reset into the
bootloader to test other stuff.
diff --git a/atmel-samd/mphalport.c b/atmel-samd/mphalport.c
@@ -22,43 +22,6 @@
 
 extern struct usart_module usart_instance;
 
-// Read by main to know when USB is connected.
-volatile bool mp_msc_enabled = false;
-bool mp_msc_enable(void) {
-    mp_msc_enabled = true;
-    return true;
-}
-
-void mp_msc_disable(void) {
-    mp_msc_enabled = false;
-}
-
-bool mp_cdc_enable(uint8_t port) {
-    mp_cdc_enabled = false;
-    return true;
-}
-
-void mp_cdc_disable(uint8_t port) {
-    mp_cdc_enabled = false;
-}
-
-volatile bool reset_on_disconnect = false;
-
-void usb_dtr_notify(uint8_t port, bool set) {
-    mp_cdc_enabled = set;
-    if (!set && reset_on_disconnect) {
-        reset_to_bootloader();
-    }
-}
-
-void usb_rts_notify(uint8_t port, bool set) {
-    return;
-}
-
-// void usb_coding_notify(uint8_t port, usb_cdc_line_coding_t* coding) {
-//     reset_on_disconnect = coding->dwDTERate == 1200;
-// }
-
 int mp_hal_stdin_rx_chr(void) {
     for (;;) {
         #ifdef MICROPY_VM_HOOK_LOOP
diff --git a/atmel-samd/reset.c b/atmel-samd/reset.c
@@ -24,10 +24,10 @@
  * THE SOFTWARE.
  */
 
-#include "flash_api.h"
 #include "reset.h"
 
 #include "include/sam.h"
+#include "supervisor/filesystem.h"
 
 // Copied from inc/uf2.h in https://github.com/Microsoft/uf2-samd21
 #ifdef SAMD21
@@ -40,7 +40,7 @@
 #define DBL_TAP_MAGIC 0xf01669ef // Randomly selected, adjusted to have first and last bit set
 
 void reset_to_bootloader(void) {
-    flash_flush();
+    filesystem_flush();
     *DBL_TAP_PTR = DBL_TAP_MAGIC;
     NVIC_SystemReset();
 }
diff --git a/atmel-samd/usb.c b/atmel-samd/usb.c
@@ -39,6 +39,7 @@
 #include "hpl/gclk/hpl_gclk_base.h"
 
 #include "lib/utils/interrupt_char.h"
+#include "reset.h"
 
 #include "supervisor/shared/autoreload.h"
 
@@ -153,22 +154,25 @@ static bool usb_device_cb_bulk_in(const uint8_t ep, const enum usb_xfer_code rc,
     return false;
 }
 
+volatile bool reset_on_disconnect = false;
+
 static bool usb_device_cb_state_c(usb_cdc_control_signal_t state)
 {
-    //uint8_t buf[64];
     if (state.rs232.DTR) {
-        // Start Rx and throw away packet.
-        //cdcdf_acm_read((uint8_t *)buf, 64);
+    } else if (!state.rs232.DTR && reset_on_disconnect) {
+        reset_to_bootloader();
     }
 
     /* No error. */
     return false;
 }
 
-// static void usbd_sof_event(void)
-// {
-//     // Triggers button state checks and HID response.
-// }
+static bool usb_device_cb_line_coding_c(const usb_cdc_line_coding_t* coding)
+{
+    reset_on_disconnect = coding->dwDTERate == 1200;
+    /* Ok to change. */
+    return true;
+}
 
 void init_usb(void) {
     init_hardware();
@@ -195,6 +199,7 @@ static inline bool cdc_enabled(void) {
     cdcdf_acm_register_callback(CDCDF_ACM_CB_READ, (FUNC_PTR)usb_device_cb_bulk_out);
     cdcdf_acm_register_callback(CDCDF_ACM_CB_WRITE, (FUNC_PTR)usb_device_cb_bulk_in);
     cdcdf_acm_register_callback(CDCDF_ACM_CB_STATE_C, (FUNC_PTR)usb_device_cb_state_c);
+    cdcdf_acm_register_callback(CDCDF_ACM_CB_LINE_CODING_C, (FUNC_PTR)usb_device_cb_line_coding_c);
     mp_cdc_enabled = true;
 
     // Ignored read.
