feat: 增加一些基础功能

project/src/by_debug.c

@@ -0,0 +1,98 @@
+#include "by_debug.h"
+
+#include "at32f415.h"
+#include "lwprintf.h"
+
+/* delay macros */
+#define STEP_DELAY_MS 50
+
+/* delay variable */
+static __IO uint32_t fac_us;
+static __IO uint32_t fac_ms;
+
+int lwprintf_out(int ch, lwprintf_t *lwp)
+{
+
+  /* May use printf to output it for test */
+
+  if (ch != '\0') {
+    while (usart_flag_get(BY_DEBUG_USART_INDEX, USART_TDC_FLAG) == RESET);
+    usart_data_transmit(BY_DEBUG_USART_INDEX, (char)ch);
+  }
+
+  return ch;
+}
+
+void by_debug_init(void)
+{
+  lwprintf_init(lwprintf_out);
+}
+
+void delay_init(void)
+{
+  systick_clock_source_config(SYSTICK_CLOCK_SOURCE_AHBCLK_DIV8);
+  crm_clocks_freq_type clocks;
+  crm_clocks_freq_get(&clocks);
+  fac_us = clocks.sclk_freq / (8000000U);
+  fac_ms = fac_us * (1000U);
+}
+
+/**
+ * @brief  inserts a delay time.
+ * @param  nus: specifies the delay time length, in microsecond.
+ * @retval none
+ */
+void delay_us(uint32_t nus)
+{
+  uint32_t temp = 0;
+  SysTick->LOAD = (uint32_t)(nus * fac_us);
+  SysTick->VAL  = 0x00;
+  SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;
+  do {
+    temp = SysTick->CTRL;
+  } while ((temp & 0x01) && !(temp & (1 << 16)));
+
+  SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
+  SysTick->VAL = 0x00;
+}
+
+/**
+ * @brief  inserts a delay time.
+ * @param  nms: specifies the delay time length, in milliseconds.
+ * @retval none
+ */
+void delay_ms(uint16_t nms)
+{
+  uint32_t temp = 0;
+  while (nms) {
+    if (nms > STEP_DELAY_MS) {
+      SysTick->LOAD = (uint32_t)(STEP_DELAY_MS * fac_ms);
+      nms -= STEP_DELAY_MS;
+    } else {
+      SysTick->LOAD = (uint32_t)(nms * fac_ms);
+      nms           = 0;
+    }
+    SysTick->VAL = 0x00;
+    SysTick->CTRL |= SysTick_CTRL_ENABLE_Msk;
+    do {
+      temp = SysTick->CTRL;
+    } while ((temp & 0x01) && !(temp & (1 << 16)));
+
+    SysTick->CTRL &= ~SysTick_CTRL_ENABLE_Msk;
+    SysTick->VAL = 0x00;
+  }
+}
+
+/**
+ * @brief  inserts a delay time.
+ * @param  sec: specifies the delay time, in seconds.
+ * @retval none
+ */
+void delay_sec(uint16_t sec)
+{
+  uint16_t index;
+  for (index = 0; index < sec; index++) {
+    delay_ms(500);
+    delay_ms(500);
+  }
+}