feat(fix): close ar100s uart7 debug

huangcm

2025-07-03 a76b2fadf6ad4adf86e241e3753a63efe03ef80c

 longan/brandy/arisc/ar100s/driver/uart/uart.c
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@@ -7,7 +7,7 @@
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  */
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 #include "uart_i.h"
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-volatile u32 uart_pin_not_used = 0;
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+volatile u32 uart_pin_not_used = 1;
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 volatile u32 uart_lock = 1;
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 volatile static u32 uart_rate;
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@@ -115,7 +115,7 @@
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 s32 uart_exit(void)
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 {
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 	uart_lock = 1;
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-	uart_pin_not_used = 0;
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+	uart_pin_not_used = 1;
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 	pin_set_multi_sel(PIN_GRP_PL, 2, 7);
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 	pin_set_multi_sel(PIN_GRP_PL, 3, 7);