IO_Firmware: update IOMCU firmware with profiled LED support over safety pins

libraries/AP_IOMCU/AP_IOMCU.cpp

@@ -43,6 +43,7 @@ enum ioevents {
     IOEVENT_SET_DSHOT_PERIOD,
     IOEVENT_SET_CHANNEL_MASK,
     IOEVENT_DSHOT,
+    IOEVENT_PROFILED,
 };
 
 // max number of consecutve protocol failures we accept before raising
@@ -89,7 +90,9 @@ void AP_IOMCU::init(void)
         crc_is_ok = true;
     }
 #endif
-
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    use_safety_as_led = boardconfig->use_safety_as_led();
+#endif
     if (!hal.scheduler->thread_create(FUNCTOR_BIND_MEMBER(&AP_IOMCU::thread_main, void), "IOMCU",
                                       1024, AP_HAL::Scheduler::PRIORITY_BOOST, 1)) {
         AP_HAL::panic("Unable to allocate IOMCU thread");
@@ -300,6 +303,16 @@ void AP_IOMCU::thread_main(void)
         }
         mask &= ~EVENT_MASK(IOEVENT_DSHOT);
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+        if (mask & EVENT_MASK(IOEVENT_PROFILED)) {
+            if (!write_registers(PAGE_PROFILED, 0, sizeof(profiled)/sizeof(uint16_t), (const uint16_t*)&profiled)) {
+                event_failed(mask);
+                continue;
+            }
+        }
+        mask &= ~EVENT_MASK(IOEVENT_PROFILED);
+#endif
+
         // check for regular timed events
         uint32_t now = AP_HAL::millis();
         if (now - last_rc_read_ms > 20) {
@@ -1439,6 +1452,23 @@ void AP_IOMCU::toggle_GPIO(uint8_t pin)
     trigger_event(IOEVENT_GPIO);
 }
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+// set profiled R G B values
+void AP_IOMCU::set_profiled(uint8_t r, uint8_t g, uint8_t b)
+{
+    if (!use_safety_as_led) {
+        return;
+    }
+    if (r == profiled.red && g == profiled.green && b == profiled.blue) {
+        return;
+    }
+    profiled.magic = PROFILED_ENABLE_MAGIC;
+    profiled.red = r;
+    profiled.green = g;
+    profiled.blue = b;
+    trigger_event(IOEVENT_PROFILED);
+}
+#endif
 
 namespace AP {
     AP_IOMCU *iomcu(void) {

libraries/AP_IOMCU/AP_IOMCU.h

@@ -176,6 +176,11 @@ public:
     // toggle a output pin
     void toggle_GPIO(uint8_t pin);
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    // set profiled values
+    void set_profiled(uint8_t r, uint8_t g, uint8_t b);
+#endif
+
     // channel group masks
     const uint8_t ch_masks[3] = { 0x03,0x0C,0xF0 };
 
@@ -297,6 +302,11 @@ private:
     // output mode values
     struct page_mode_out mode_out;
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    // profiled control
+    struct page_profiled profiled {0, 255, 255, 255}; // by default, white
+#endif
+
     // IMU heater duty cycle
     uint8_t heater_duty_cycle;
 
@@ -310,6 +320,9 @@ private:
     bool detected_io_reset;
     bool initialised;
     bool is_chibios_backend;
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    bool use_safety_as_led;
+#endif
 
     uint32_t protocol_fail_count;
     uint32_t protocol_count;

libraries/AP_IOMCU/iofirmware/iofirmware.cpp

@@ -489,6 +489,10 @@ void AP_IOMCU_FW::update()
         last_status_ms = now;
         page_status_update();
     }
+
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    profiled_update();
+#endif
 #ifdef HAL_WITH_BIDIR_DSHOT
     // EDT updates are semt at ~1Hz per ESC, but we want to make sure
     // that we don't delay updates unduly so sample at 5Hz
@@ -1029,6 +1033,20 @@ bool AP_IOMCU_FW::handle_code_write()
         break;
     }
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    case PAGE_PROFILED:
+        if (rx_io_packet.count != 2 || (rx_io_packet.regs[0] & 0xFF) != PROFILED_ENABLE_MAGIC) {
+            return false;
+        }
+        profiled_brg[0] = rx_io_packet.regs[0] >> 8;
+        profiled_brg[1] = rx_io_packet.regs[1] & 0xFF;
+        profiled_brg[2] = rx_io_packet.regs[1] >> 8;
+        // push new led data
+        profiled_num_led_pushed = 0;
+        profiled_control_enabled = true;
+        break;
+#endif
+
     default:
         break;
     }
@@ -1063,6 +1081,48 @@ void AP_IOMCU_FW::calculate_fw_crc(void)
     reg_setup.crc[1] = sum >> 16;
 }
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+// bitbang profiled bitstream, 8-10 chunks at a time
+// Max time taken per call is ~7us
+void AP_IOMCU_FW::profiled_update(void)
+{
+    if (profiled_num_led_pushed > PROFILED_LED_LEN) {
+        profiled_byte_index = 0;
+        profiled_leading_zeros = PROFILED_LEADING_ZEROS;
+        return;
+    }
+
+    // push 10 zero leading bits at a time
+    if (profiled_leading_zeros != 0) {
+        for (uint8_t i = 0; i < 10; i++) {
+            palClearLine(HAL_GPIO_PIN_SAFETY_INPUT);
+            palSetLine(HAL_GPIO_PIN_SAFETY_INPUT);
+            profiled_leading_zeros--;
+        }
+        return;
+    }
+
+    if ((profiled_byte_index == 0) ||
+        (profiled_byte_index == PROFILED_OUTPUT_BYTE_LEN)) {
+        // start bit
+        palClearLine(HAL_GPIO_PIN_SAFETY_INPUT);
+        palSetLine(HAL_GPIO_PIN_SAFETY_LED);
+        palSetLine(HAL_GPIO_PIN_SAFETY_INPUT);
+        profiled_byte_index = 0;
+        profiled_num_led_pushed++;
+    }
+
+    uint8_t byte_val = profiled_brg[profiled_byte_index];
+    for (uint8_t i = 0; i < 8; i++) {
+        palClearLine(HAL_GPIO_PIN_SAFETY_INPUT);
+        palWriteLine(HAL_GPIO_PIN_SAFETY_LED, byte_val & 1);
+        byte_val >>= 1;
+        palSetLine(HAL_GPIO_PIN_SAFETY_INPUT);
+    }
+
+    profiled_byte_index++;
+}
+#endif
 
 /*
   update safety state
@@ -1076,6 +1136,15 @@ void AP_IOMCU_FW::safety_update(void)
     }
     safety_update_ms = now;
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    if (profiled_control_enabled) {
+        // set line mode to output for safety input pin
+        palSetLineMode(HAL_GPIO_PIN_SAFETY_INPUT, PAL_MODE_OUTPUT_PUSHPULL);
+        palSetLineMode(HAL_GPIO_PIN_SAFETY_LED, PAL_MODE_OUTPUT_PUSHPULL);
+        return;
+    }
+#endif
+
     bool safety_pressed = palReadLine(HAL_GPIO_PIN_SAFETY_INPUT);
     if (safety_pressed) {
         if (reg_status.flag_safety_off && (reg_setup.arming & P_SETUP_ARMING_SAFETY_DISABLE_ON)) {

libraries/AP_IOMCU/iofirmware/iofirmware.h

@@ -17,6 +17,10 @@
 #define PWM_IGNORE_THIS_CHANNEL UINT16_MAX
 #define SERVO_COUNT 8
 
+#define PROFILED_LED_LEN         2
+#define PROFILED_OUTPUT_BYTE_LEN 3
+#define PROFILED_LEADING_ZEROS   50
+
 class AP_IOMCU_FW {
 public:
     void process_io_packet();
@@ -36,6 +40,9 @@ public:
     bool handle_code_write();
     bool handle_code_read();
     void schedule_reboot(uint32_t time_ms);
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    void profiled_update();
+#endif
     void safety_update();
     void rcout_config_update();
     void rcin_serial_init();
@@ -81,6 +88,14 @@ public:
 
     uint16_t last_channel_mask;
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    uint8_t profiled_byte_index;
+    uint8_t profiled_leading_zeros;
+    uint8_t profiled_num_led_pushed;
+    uint8_t profiled_brg[3];
+    bool profiled_control_enabled;
+#endif
+
     // CONFIG values
     struct page_config config;
 
@@ -117,6 +132,11 @@ public:
     // output mode values
     struct page_mode_out mode_out;
 
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    // profiled control values
+    struct page_profiled profiled;
+#endif
+
     uint16_t last_output_mode_mask;
     uint16_t last_output_bdmask;
     uint16_t last_output_esc_type;

libraries/AP_IOMCU/iofirmware/ioprotocol.h

@@ -7,6 +7,10 @@
   common protocol definitions between AP_IOMCU and iofirmware
  */
 
+#ifndef AP_IOMCU_PROFILED_SUPPORT_ENABLED
+#define AP_IOMCU_PROFILED_SUPPORT_ENABLED 0
+#endif
+
 // 22 is enough for the rc_input page in one transfer
 #define PKT_MAX_REGS 22
 // The number of channels that can be propagated - due to SBUS_OUT is higher than the physical channels
@@ -68,6 +72,9 @@ enum iopage {
     PAGE_RAW_DSHOT_TELEM_5_8 = 205,
     PAGE_RAW_DSHOT_TELEM_9_12 = 206,
     PAGE_RAW_DSHOT_TELEM_13_16 = 207,
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+    PAGE_PROFILED = 208,
+#endif
 };
 
 // setup page registers
@@ -114,6 +121,8 @@ enum iopage {
 #define PAGE_REG_SETUP_FORCE_SAFETY_ON  14
 #define FORCE_SAFETY_MAGIC 22027
 
+#define PROFILED_ENABLE_MAGIC 123
+
 struct page_config {
     uint16_t protocol_version;
     uint16_t protocol_version2;
@@ -230,3 +239,12 @@ struct page_dshot_telem {
     uint8_t   edt2_stress[4];
 #endif
 };
+
+#if AP_IOMCU_PROFILED_SUPPORT_ENABLED
+struct __attribute__((packed, aligned(2))) page_profiled {
+    uint8_t magic;
+    uint8_t blue;
+    uint8_t red;
+    uint8_t green;
+};
+#endif