diff options
Diffstat (limited to 'hw')
| -rw-r--r-- | hw/bsp/stm32f7/family.c | 21 |
1 files changed, 16 insertions, 5 deletions
diff --git a/hw/bsp/stm32f7/family.c b/hw/bsp/stm32f7/family.c index 7a322591b..9427ac4a6 100644 --- a/hw/bsp/stm32f7/family.c +++ b/hw/bsp/stm32f7/family.c @@ -82,8 +82,9 @@ static UART_HandleTypeDef UartHandle = {.Instance = USARTn, .OverSampling = UART_OVERSAMPLING_16, }}; -// RX ring buffer via RXNE interrupt — no HAL IT functions used (avoid HAL state conflicts) -static uint8_t uart_rx_ff_buf[32]; +// RX ring buffer via RXNE interrupt — no HAL IT functions used (avoid HAL state conflicts). +// Sized to absorb a full host-forwarding burst (>64B) when the main loop briefly stalls. +static uint8_t uart_rx_ff_buf[256]; static tu_fifo_t uart_rx_ff; void USARTn_IRQHandler(void) { @@ -142,13 +143,24 @@ void board_init(void) { // 1ms tick timer SysTick_Config(SystemCoreClock / 1000); + // Set UART interrupt higher priority than USB OTG since the F7 USART has no hardware RX FIFO, so a host example's + // UART RX must not be starved by the frequent USB host interrupts or incoming bytes overrun (ORE) and dropped. + NVIC_SetPriority(OTG_FS_IRQn, 1); + NVIC_SetPriority(OTG_HS_IRQn, 1); + #ifdef UART_ID + NVIC_SetPriority(USARTn_IRQn, 0); + #endif + #elif CFG_TUSB_OS == OPT_OS_FREERTOS // Explicitly disable systick to prevent its ISR from running before scheduler start SysTick->CTRL &= ~1U; // If freeRTOS is used, IRQ priority is limit by max syscall ( smaller is higher ) - NVIC_SetPriority(OTG_FS_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY); - NVIC_SetPriority(OTG_HS_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY); + NVIC_SetPriority(OTG_FS_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY + 1); + NVIC_SetPriority(OTG_HS_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY + 1); + #ifdef UART_ID + NVIC_SetPriority(USARTn_IRQn, configLIBRARY_MAX_SYSCALL_INTERRUPT_PRIORITY); + #endif #endif #ifdef UART_ID @@ -156,7 +168,6 @@ void board_init(void) { HAL_UART_Init(&UartHandle); tu_fifo_config(&uart_rx_ff, uart_rx_ff_buf, sizeof(uart_rx_ff_buf), false); USARTn->CR1 |= USART_CR1_RXNEIE; - NVIC_SetPriority(USARTn_IRQn, (1 << __NVIC_PRIO_BITS) - 1); NVIC_EnableIRQ(USARTn_IRQn); #endif |