From d6bf5f18bba5350ba8c3799499696c7fc4478b2d Mon Sep 17 00:00:00 2001
From: Linar Yusupov <linar.r.yusupov@gmail.com>
Date: Tue, 1 Oct 2024 13:26:40 +0300
Subject: [PATCH] [CH32] disable battery voltage ADC for a while

---
 .../source/SoftRF/src/platform/CH32.cpp       | 67 ++++++++++++++++++-
 .../source/SoftRF/src/platform/CH32.h         |  2 +-
 2 files changed, 67 insertions(+), 2 deletions(-)

diff --git a/software/firmware/source/SoftRF/src/platform/CH32.cpp b/software/firmware/source/SoftRF/src/platform/CH32.cpp
index 929eacd7d..9eebf0882 100644
--- a/software/firmware/source/SoftRF/src/platform/CH32.cpp
+++ b/software/firmware/source/SoftRF/src/platform/CH32.cpp
@@ -590,6 +590,67 @@ static void CH32_Button_fini()
 #endif /* SOC_GPIO_PIN_BUTTON != SOC_UNUSED_PIN */
 }
 
+#if defined(USE_TINYUSB)
+static void CH32_USB_setup() {
+#if !defined(USBCON)
+  USBSerial.begin(SERIAL_OUT_BR);
+#endif /* USBCON */
+}
+
+static void CH32_USB_loop()  {
+
+}
+
+static void CH32_USB_fini()  {
+#if !defined(USBCON)
+  USBSerial.end();
+#endif /* USBCON */
+}
+
+static int CH32_USB_available()
+{
+  int rval = 0;
+
+  if (USBSerial) {
+    rval = USBSerial.available();
+  }
+
+  return rval;
+}
+
+static int CH32_USB_read()
+{
+  int rval = -1;
+
+  if (USBSerial) {
+    rval = USBSerial.read();
+  }
+
+  return rval;
+}
+
+static size_t CH32_USB_write(const uint8_t *buffer, size_t size)
+{
+  size_t rval = size;
+
+  if (USBSerial && (size < USBSerial.availableForWrite())) {
+    rval = USBSerial.write(buffer, size);
+  }
+
+  return rval;
+}
+
+IODev_ops_t CH32_USBSerial_ops = {
+  "CH32 USBSerial",
+  CH32_USB_setup,
+  CH32_USB_loop,
+  CH32_USB_fini,
+  CH32_USB_available,
+  CH32_USB_read,
+  CH32_USB_write
+};
+#endif /* USE_TINYUSB */
+
 const SoC_ops_t CH32_ops = {
   SOC_CH32,
   "CH32",
@@ -617,8 +678,12 @@ const SoC_ops_t CH32_ops = {
   CH32_SPI_begin,
   CH32_swSer_begin,
   CH32_swSer_enableRx,
-  NULL, /* TODO */
   NULL,
+#if defined(USE_TINYUSB)
+  &CH32_USBSerial_ops,
+#else
+  NULL,
+#endif /* USE_TINYUSB */
   NULL,
   CH32_Display_setup,
   CH32_Display_loop,
diff --git a/software/firmware/source/SoftRF/src/platform/CH32.h b/software/firmware/source/SoftRF/src/platform/CH32.h
index af7f405f4..efd8f4f93 100644
--- a/software/firmware/source/SoftRF/src/platform/CH32.h
+++ b/software/firmware/source/SoftRF/src/platform/CH32.h
@@ -129,7 +129,7 @@ struct rst_info {
 
 #define SOC_GPIO_PIN_LED      SOC_UNUSED_PIN
 #define SOC_GPIO_PIN_GNSS_PPS PA3
-#define SOC_GPIO_PIN_BATTERY  PA0
+#define SOC_GPIO_PIN_BATTERY  SOC_UNUSED_PIN /* PA0 TBD */
 #define SOC_GPIO_PIN_BUTTON   SOC_UNUSED_PIN /* PB3 */
 
 #define SOC_GPIO_RADIO_LED_RX SOC_UNUSED_PIN