From 430efad690e7038339550020b51e8f1c7fa235ed Mon Sep 17 00:00:00 2001
From: HiFiPhile <admin@hifiphile.com>
Date: Wed, 24 Jun 2026 21:59:41 +0200
Subject: [PATCH] skip pdo request if no suitable voltage

Signed-off-by: HiFiPhile <admin@hifiphile.com>
---
 examples/typec/power_delivery/src/main.c | 28 ++++++++++++++++--------
 1 file changed, 19 insertions(+), 9 deletions(-)

diff --git a/examples/typec/power_delivery/src/main.c b/examples/typec/power_delivery/src/main.c
index 7c1a0bcaf..78e29d166 100644
--- a/examples/typec/power_delivery/src/main.c
+++ b/examples/typec/power_delivery/src/main.c
@@ -39,7 +39,7 @@
 // defined here. Otherwise, you may damage your board, smoke can come out
 #define VOLTAGE_MAX_MV       5000 // maximum voltage in mV
 #define CURRENT_MAX_MA       500  // maximum current in mA
-#define CURRENT_OPERATING_MA 100  // operating current in mA
+#define CURRENT_OPERATING_MA 300  // operating current in mA
 
 /* Blink pattern
  * - 250 ms  : Type-C disconnected
@@ -60,7 +60,7 @@ int main(void)
   board_init();
   board_led_write(true);
 
-  tuc_init(0, TUSB_TYPEC_PORT_SNK);
+  tuc_init(0, TUSB_TYPEC_PORT_DISCONNECTED);
 
   while (1) {
     typec_connect_task();
@@ -87,6 +87,7 @@ bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t
       printf("PD Source Capabilities\r\n");
       // Examine source capability and select a suitable PDO (starting from 1 with safe5v)
       uint8_t selected_pos = 1;
+      bool voltage_available = false;
 
       for(size_t i=0; i<header->n_data_obj; i++) {
         TU_VERIFY(dobj < p_end);
@@ -97,11 +98,15 @@ bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t
             pd_pdo_fixed_t const* fixed = (pd_pdo_fixed_t const*) &pdo;
             uint32_t const voltage_mv = fixed->voltage_50mv*50;
             uint32_t const current_ma = fixed->current_max_10ma*10;
-            printf("[Fixed] %"PRIu32" mV %"PRIu32" mA\r\n", voltage_mv, current_ma);
+            printf("[Fixed] PDO%"PRIu8" %"PRIu32" mV %"PRIu32" mA\r\n", i+1, voltage_mv, current_ma);
 
-            if (voltage_mv <= VOLTAGE_MAX_MV && current_ma >= CURRENT_MAX_MA) {
-              // Found a suitable PDO
-              selected_pos = i+1;
+            if (voltage_mv <= VOLTAGE_MAX_MV) {
+              voltage_available = true;
+
+              if (current_ma >= CURRENT_MAX_MA) {
+                // Found a suitable PDO
+                selected_pos = i+1;
+              }
             }
 
             break;
@@ -124,12 +129,17 @@ bool tuc_pd_data_received_cb(uint8_t rhport, pd_header_t const* header, uint8_t
       // Be careful and make sure your board can withstand the selected PDO
       // voltage other than safe5v e.g 12v or 20v
 
+      if (!voltage_available) {
+        printf("No PDO within %"PRIu32" mV, skip request\r\n", (uint32_t) VOLTAGE_MAX_MV);
+        break;
+      }
+
       printf("Selected PDO %u\r\n", selected_pos);
 
       // Send request with selected PDO position as response to Source Cap
       pd_rdo_fixed_variable_t rdo = {
-          .current_extremum_10ma = 50, // max 500mA
-          .current_operate_10ma = 30, // 300mA
+          .current_extremum_10ma = CURRENT_MAX_MA / 10,
+          .current_operate_10ma = CURRENT_OPERATING_MA / 10,
           .reserved = 0,
           .epr_mode_capable = 0,
           .unchunked_ext_msg_support = 0,
@@ -181,7 +191,7 @@ bool tuc_pd_control_received_cb(uint8_t rhport, pd_header_t const* header) {
 void typec_connect_task(void)
 {
   static uint32_t btn_prev = 0;
-  static bool connected = true;
+  static bool connected = false;
 
   uint32_t const btn = board_button_read();