Added firmware for Electronic Cats hardware

.gitignore

@@ -24,3 +24,11 @@ fp-info-cache
 # Exported BOM files
 *.xml
 *.csv
+
+.DS_Store
+
+hardware/fp-lib-table
+
+hardware/sym-lib-table
+
+*.dcm

firmware/CMSIS_DAP.ino

@@ -0,0 +1,42 @@
+/*
+  CMSIS_DAP
+
+  Modified form ljbfly's implementation, working but a lot to improve
+  RST   -> P30
+  SWCLK -> P31
+  SWDIO -> P32
+  These pins works in OC mode with pull-up resistor (70K). Should be safe to connect 3.3V part.
+
+  created 2020
+  by Deqing Sun for use with CH55xduino
+
+  This example code is in the public domain.
+
+*/
+
+
+#ifndef USER_USB_RAM
+#error "This example needs to be compiled with a USER USB setting"
+#endif
+
+#include "src/CMSIS_DAPusb/DAP.h"
+
+
+extern volatile __xdata uint8_t USBByteCountEP1;
+
+
+void setup() {
+  USBInit();
+}
+
+void loop() {
+  if (USBByteCountEP1) {
+    DAP_Thread();
+    USBByteCountEP1 = 0 ;
+
+    UEP1_CTRL = UEP1_CTRL & ~ MASK_UEP_R_RES | UEP_R_RES_ACK; //enable receive
+
+    UEP1_T_LEN = 64;
+    UEP1_CTRL = UEP1_CTRL & ~ MASK_UEP_T_RES | UEP_T_RES_ACK; //enable send
+  }
+}