From 8bc6f6d5db73e18ddf12c4c97db1ea14485247b7 Mon Sep 17 00:00:00 2001
From: zhji <jzhgonha@163.com>
Date: Mon, 2 Jun 2025 20:37:44 +0800
Subject: [PATCH] [feat] add uart_interrupt demo

---
 driver/start.S                                |  6 +--
 .../uart/uart_interrupt/CMakeLists.txt        |  9 ++++
 .../peripherals/uart/uart_interrupt/Makefile  | 18 ++++++++
 .../peripherals/uart/uart_interrupt/main.c    | 43 +++++++++++++++++++
 .../peripherals/uart/uart_interrupt/proj.conf |  1 +
 5 files changed, 72 insertions(+), 5 deletions(-)
 create mode 100644 example/peripherals/uart/uart_interrupt/CMakeLists.txt
 create mode 100644 example/peripherals/uart/uart_interrupt/Makefile
 create mode 100644 example/peripherals/uart/uart_interrupt/main.c
 create mode 100644 example/peripherals/uart/uart_interrupt/proj.conf

diff --git a/driver/start.S b/driver/start.S
index e117874..183eefa 100644
--- a/driver/start.S
+++ b/driver/start.S
@@ -19,10 +19,6 @@ isr_reset:
     ldr r0, =0xE000E280
     ldr r1, =0xFFFFFFFF
     str r1, [r0]
-    /* relocate VTOR, vector table offset register */
-    ldr r0, =0xE000ED08
-    ldr r1, =_vector_load
-    str r1, [r0]
     /* set MSP, main stack point */
     ldr r0, =_stack_top
     msr msp, r0
@@ -52,7 +48,7 @@ isr_reset:
     cmp r1, r2
     blo 1b
 2:
-;    bl  SystemInit
+    bl  irq_init
     bl  main
     b  .
 .size  isr_reset, .-isr_reset
diff --git a/example/peripherals/uart/uart_interrupt/CMakeLists.txt b/example/peripherals/uart/uart_interrupt/CMakeLists.txt
new file mode 100644
index 0000000..e07dfed
--- /dev/null
+++ b/example/peripherals/uart/uart_interrupt/CMakeLists.txt
@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.10)
+
+include(proj.conf)
+
+project(${EXAMPLE_NAME} VERSION 0.1)
+add_executable(${EXAMPLE_NAME}.elf main.c)
+
+add_subdirectory(${SDK_BASE_DIR} sdk)
+target_link_libraries(${EXAMPLE_NAME}.elf sdk)
diff --git a/example/peripherals/uart/uart_interrupt/Makefile b/example/peripherals/uart/uart_interrupt/Makefile
new file mode 100644
index 0000000..df5330b
--- /dev/null
+++ b/example/peripherals/uart/uart_interrupt/Makefile
@@ -0,0 +1,18 @@
+EXAMPLE_BASE_DIR ?= $(shell realpath .)
+EXAMPLE_NAME := $(notdir $(patsubst %/,%,$(CURDIR)))
+SDK_BASE_DIR ?= $(shell realpath ./../../../..)
+
+export SDK_BASE_DIR
+export EXAMPLE_NAME
+export EXAMPLE_BASE_DIR
+
+GCC_PATH := $(shell which arm-none-eabi-gcc)
+CROSS_COMPILE := $(patsubst %gcc,%,$(GCC_PATH))
+ifeq ($(GCC_PATH),)
+$(error arm-none-eabi-gcc not found in PATH. Please install the ARM toolchain.)
+endif
+
+# add custom cmake definition
+#cmake_definition+=-Dxxx=sss
+
+include $(SDK_BASE_DIR)/project.build
diff --git a/example/peripherals/uart/uart_interrupt/main.c b/example/peripherals/uart/uart_interrupt/main.c
new file mode 100644
index 0000000..44c1574
--- /dev/null
+++ b/example/peripherals/uart/uart_interrupt/main.c
@@ -0,0 +1,43 @@
+#include "gpio.h"
+#include "uart.h"
+#include "resets.h"
+#include "irq.h"
+#include "stdio.h"
+
+#define UART_ID uart0_hw
+
+void uart_isr(void)
+{
+    int c, r;
+
+    while (1) {
+        c = uart_get_char(UART_ID);
+        if (c < 0) {
+            break;
+        } else {
+            while (1) {
+                r = uart_put_char(UART_ID, (uint8_t)c);
+                if (r < 0) {
+                    continue;
+                } else {
+                    break;
+                }
+            }
+        }
+    }
+}
+
+int main(void)
+{
+    reset_unreset_blocks_wait(RESETS_BLOCK_IO_BANK0 | RESETS_BLOCK_UART0);
+
+    gpio_init(0, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_DRIVE_4MA); /* UART_TX pin */
+    gpio_init(1, GPIO_FUNC_UART | GPIO_PULL_UP | GPIO_SCHMITT | GPIO_PAD_IE | GPIO_PAD_OD); /* UART_RX pin */
+    uart_init(UART_ID, 6 * 1000 * 1000, UART_DATABITS_8 | UART_PARITY_NONE | UART_STOPBITS_1);
+    printf("uart_interrupt example\r\n");
+    uart_int_enable(UART_ID, UART_INT_RX | UART_INT_RTO);
+    irq_attach(UART0_IRQ, uart_isr);
+    irq_enable(UART0_IRQ);
+
+    return 0;
+}
diff --git a/example/peripherals/uart/uart_interrupt/proj.conf b/example/peripherals/uart/uart_interrupt/proj.conf
new file mode 100644
index 0000000..7d2ef31
--- /dev/null
+++ b/example/peripherals/uart/uart_interrupt/proj.conf
@@ -0,0 +1 @@
+# set(CONFIG_COMPONENT1 1)