[bsp][raspberry-pi]Fix the issue of inaccurate system tick.

Guozhanxin · mysterywolf · commit ccf0ad297bfd · 2022-08-08T10:01:15.000-04:00
diff --git a/bsp/raspberry-pico/board/board.c b/bsp/raspberry-pico/board/board.c
@@ -64,7 +64,7 @@ void rt_hw_board_init()
     }
 
     /* Configure the SysTick */
-    systick_config(frequency_count_khz(CLOCKS_FC0_SRC_VALUE_ROSC_CLKSRC)*10000/RT_TICK_PER_SECOND);
+    systick_config(frequency_count_khz(CLOCKS_FC0_SRC_VALUE_PLL_SYS_CLKSRC_PRIMARY) * 1000 / RT_TICK_PER_SECOND);
 
     stdio_init_all();
     rt_hw_uart_init();

Original file line number	Diff line number	Diff line change
`@@ -64,7 +64,7 @@ void rt_hw_board_init()`
`64`	`64`	`}`
`65`	`65`
`66`	`66`	`/* Configure the SysTick */`
`67`		`- systick_config(frequency_count_khz(CLOCKS_FC0_SRC_VALUE_ROSC_CLKSRC)*10000/RT_TICK_PER_SECOND);`
	`67`	`+ systick_config(frequency_count_khz(CLOCKS_FC0_SRC_VALUE_PLL_SYS_CLKSRC_PRIMARY) * 1000 / RT_TICK_PER_SECOND);`
`68`	`68`
`69`	`69`	`stdio_init_all();`
`70`	`70`	`rt_hw_uart_init();`