From f611fc8f5d9cbc65b5ce089a8a311180e7152671 Mon Sep 17 00:00:00 2001
From: Simon Kueppers <simon.kueppers@skueppers.de>
Date: Thu, 20 Oct 2022 20:04:13 +0200
Subject: [PATCH] Implemented PTT1 and PTT2 functionality

---
 stm32/aioc-fw/Src/led.h        |  7 +++--
 stm32/aioc-fw/Src/main.c       |  4 +--
 stm32/aioc-fw/Src/usb_serial.c | 49 ++++++++++++++++++++++++----------
 3 files changed, 42 insertions(+), 18 deletions(-)

diff --git a/stm32/aioc-fw/Src/led.h b/stm32/aioc-fw/Src/led.h
index 58672c5..ddf8f74 100644
--- a/stm32/aioc-fw/Src/led.h
+++ b/stm32/aioc-fw/Src/led.h
@@ -8,8 +8,11 @@
 #define LED_GPIO_PIN1   GPIO_PIN_8
 #define LED_GPIO_PIN2   GPIO_PIN_9
 
-#define LED_SET1(x) LED_TIMER->CCR3 = ( ((uint32_t) ((x) * 255)) & 0xFF )
-#define LED_SET2(x) LED_TIMER->CCR4 = (512 - ( ((uint32_t) ((x) * 255)) & 0xFF ))
+#define LED_IDLE_LEVEL  0.1
+#define LED_FULL_LEVEL  1.0
+
+#define LED_SET1(x) LED_TIMER->CCR3 = (512 - ( ((uint32_t) ((x) * 255)) & 0xFF ))
+#define LED_SET2(x) LED_TIMER->CCR4 = ( ((uint32_t) ((x) * 255)) & 0xFF )
 
 void LED_Init(void);
 
diff --git a/stm32/aioc-fw/Src/main.c b/stm32/aioc-fw/Src/main.c
index 66416d9..20c31e2 100644
--- a/stm32/aioc-fw/Src/main.c
+++ b/stm32/aioc-fw/Src/main.c
@@ -68,8 +68,8 @@ int main(void)
 
     USB_Init();
 
-    LED_SET1(0.0);
-    LED_SET1(0.0);
+    LED_SET1(LED_IDLE_LEVEL);
+    LED_SET2(LED_IDLE_LEVEL);
 
     while (1) {
         USB_Task();
diff --git a/stm32/aioc-fw/Src/usb_serial.c b/stm32/aioc-fw/Src/usb_serial.c
index 2480150..1c6837b 100644
--- a/stm32/aioc-fw/Src/usb_serial.c
+++ b/stm32/aioc-fw/Src/usb_serial.c
@@ -129,13 +129,22 @@ void tud_cdc_line_coding_cb(uint8_t itf, cdc_line_coding_t const* p_line_coding)
 // Invoked when cdc when line state changed e.g connected/disconnected
 void tud_cdc_line_state_cb(uint8_t itf, bool dtr, bool rts)
 {
-    // TODO set some indicator
-    if ( dtr )
-    {
-        LED_SET2(1.0);
-    }else
-    {
-        LED_SET2(0.0);
+    if (dtr & !rts) {
+        /* PTT1 */
+        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_SET);
+        LED_SET2(LED_FULL_LEVEL);
+    } else {
+        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_1, GPIO_PIN_RESET);
+        LED_SET2(LED_IDLE_LEVEL);
+    }
+
+    if (!dtr & rts) {
+        /* PTT2 */
+        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_SET);
+        LED_SET1(LED_FULL_LEVEL);
+    } else {
+        HAL_GPIO_WritePin(GPIOA, GPIO_PIN_0, GPIO_PIN_RESET);
+        LED_SET1(LED_IDLE_LEVEL);
     }
 }
 
@@ -143,13 +152,23 @@ void USB_SerialInit(void)
 {
     /* Set up GPIO */
     __HAL_RCC_GPIOA_CLK_ENABLE();
-    GPIO_InitTypeDef GPIO_InitStruct;
-    GPIO_InitStruct.Pin = (GPIO_PIN_9 | GPIO_PIN_10);
-    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
-    GPIO_InitStruct.Pull = GPIO_PULLUP;
-    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
-    GPIO_InitStruct.Alternate = GPIO_AF7_USART1;
-    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
+    GPIO_InitTypeDef SerialGpio;
+    SerialGpio.Pin = (GPIO_PIN_9 | GPIO_PIN_10);
+    SerialGpio.Mode = GPIO_MODE_AF_PP;
+    SerialGpio.Pull = GPIO_PULLUP;
+    SerialGpio.Speed = GPIO_SPEED_FREQ_LOW;
+    SerialGpio.Alternate = GPIO_AF7_USART1;
+    HAL_GPIO_Init(GPIOA, &SerialGpio);
+
+    /* Set up RTS and DTR controlled GPIOs */
+    GPIO_InitTypeDef RtsDtrGpio = {
+        .Pin = (GPIO_PIN_0 | GPIO_PIN_1),
+        .Mode = GPIO_MODE_OUTPUT_PP,
+        .Pull = GPIO_PULLDOWN,
+        .Speed = GPIO_SPEED_FREQ_LOW,
+        .Alternate = 0
+    };
+    HAL_GPIO_Init(GPIOA, &RtsDtrGpio);
 
     /* Initialize UART */
     __HAL_RCC_USART1_CLK_ENABLE();
@@ -162,6 +181,8 @@ void USB_SerialInit(void)
 
     /* Enable interrupt */
     NVIC_EnableIRQ(USART1_IRQn);
+
+
 }
 
 void USB_SerialTask(void)