uart working on u5a5

examples/device/board_test/src/main.c

@@ -26,39 +26,31 @@
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
-
 #include "bsp/board_api.h"
 
-//--------------------------------------------------------------------+
-// MACRO CONSTANT TYPEDEF PROTOTYPES
-//--------------------------------------------------------------------+
-
 /* Blink pattern
  * - 250 ms  : button is not pressed
  * - 1000 ms : button is pressed (and hold)
  */
-enum  {
+enum {
   BLINK_PRESSED = 250,
   BLINK_UNPRESSED = 1000
 };
 
 #define HELLO_STR   "Hello from TinyUSB\r\n"
 
-int main(void)
-{
+int main(void) {
   board_init();
   board_led_write(true);
 
   uint32_t start_ms = 0;
   bool led_state = false;
 
-  while (1)
-  {
+  while (1) {
     uint32_t interval_ms = board_button_read() ? BLINK_PRESSED : BLINK_UNPRESSED;
 
     // Blink and print every interval ms
-    if ( !(board_millis() - start_ms < interval_ms) )
-    {
+    if (!(board_millis() - start_ms < interval_ms)) {
       board_uart_write(HELLO_STR, strlen(HELLO_STR));
 
       start_ms = board_millis();
@@ -69,16 +61,14 @@ int main(void)
 
     // echo
     uint8_t ch;
-    if ( board_uart_read(&ch, 1) > 0 )
-    {
+    if (board_uart_read(&ch, 1) > 0) {
       board_uart_write(&ch, 1);
     }
   }
 }
 
 #if CFG_TUSB_MCU == OPT_MCU_ESP32S2 || CFG_TUSB_MCU == OPT_MCU_ESP32S3
-void app_main(void)
-{
+void app_main(void) {
   main();
 }
 #endif

hw/bsp/stm32u5/boards/stm32u5a5nucleo/board.h

@@ -43,12 +43,12 @@ extern "C"
 #define BUTTON_STATE_ACTIVE 1
 
 // UART Enable for STLink VCOM
-#define UART_DEV LPUART1
-#define UART_CLK_EN __HAL_RCC_LPUART1_CLK_ENABLE
-#define UART_GPIO_PORT GPIOG
-#define UART_GPIO_AF GPIO_AF8_LPUART1
-#define UART_TX_PIN GPIO_PIN_7
-#define UART_RX_PIN GPIO_PIN_8
+#define UART_DEV USART1
+#define UART_CLK_EN __HAL_RCC_USART1_CLK_ENABLE
+#define UART_GPIO_PORT GPIOA
+#define UART_GPIO_AF GPIO_AF7_USART1
+#define UART_TX_PIN GPIO_PIN_9
+#define UART_RX_PIN GPIO_PIN_10
 
 //--------------------------------------------------------------------+
 // RCC Clock
@@ -103,16 +103,24 @@ static void SystemClock_Config(void) {
   // USB Clock
   __HAL_RCC_SYSCFG_CLK_ENABLE();
 
-  RCC_PeriphCLKInitTypeDef PeriphClkInit = {0};
-  PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USBPHY;
-  PeriphClkInit.UsbPhyClockSelection = RCC_USBPHYCLKSOURCE_HSE;
-  if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK) {
+  RCC_PeriphCLKInitTypeDef usb_clk_init = { 0};
+  usb_clk_init.PeriphClockSelection = RCC_PERIPHCLK_USBPHY;
+  usb_clk_init.UsbPhyClockSelection = RCC_USBPHYCLKSOURCE_HSE;
+  if (HAL_RCCEx_PeriphCLKConfig(&usb_clk_init) != HAL_OK) {
     Error_Handler();
   }
 
   /** Set the OTG PHY reference clock selection
   */
   HAL_SYSCFG_SetOTGPHYReferenceClockSelection(SYSCFG_OTG_HS_PHY_CLK_SELECT_1);
+
+  // USART clock
+  RCC_PeriphCLKInitTypeDef uart_clk_init = { 0};
+  uart_clk_init.PeriphClockSelection = RCC_PERIPHCLK_USART1;
+  uart_clk_init.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
+  if (HAL_RCCEx_PeriphCLKConfig(&uart_clk_init) != HAL_OK) {
+    Error_Handler();
+  }
 }
 
 static void SystemPower_Config(void) {

hw/bsp/stm32u5/family.c

@@ -106,7 +106,7 @@ void board_init(void) {
   GPIO_InitStruct.Pin = UART_TX_PIN | UART_RX_PIN;
   GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
   GPIO_InitStruct.Pull = GPIO_NOPULL;
-  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_LOW;
+  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_MEDIUM;
   GPIO_InitStruct.Alternate = UART_GPIO_AF;
   HAL_GPIO_Init(UART_GPIO_PORT, &GPIO_InitStruct);
 
@@ -121,7 +121,6 @@ void board_init(void) {
   UartHandle.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
   UartHandle.Init.ClockPrescaler = UART_PRESCALER_DIV1;
   UartHandle.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
-
   HAL_UART_Init(&UartHandle);
 
   /* Configure USB GPIOs */
@@ -196,8 +195,6 @@ void board_init(void) {
   USB_OTG_HS->GCCFG |= USB_OTG_GCCFG_VBVALEXTOEN;
   USB_OTG_HS->GCCFG |= USB_OTG_GCCFG_VBVALOVAL;
 #endif // USB_OTG_FS
-
-
 }
 
 //--------------------------------------------------------------------+