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Diffstat (limited to 'examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c')
-rw-r--r--examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c b/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c
index bd245ff..eff476e 100644
--- a/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c
+++ b/examples/stm32/f1/lisa-m-2/usart_printf/usart_printf.c
@@ -25,7 +25,9 @@
#include <stdio.h>
#include <errno.h>
-void clock_setup(void)
+int _write(int file, char *ptr, int len);
+
+static void clock_setup(void)
{
rcc_clock_setup_in_hse_12mhz_out_72mhz();
@@ -38,7 +40,7 @@ void clock_setup(void)
rcc_peripheral_enable_clock(&RCC_APB1ENR, RCC_APB1ENR_USART2EN);
}
-void usart_setup(void)
+static void usart_setup(void)
{
/* Setup GPIO pin GPIO_USART2_RE_TX on GPIO port B for transmit. */
gpio_set_mode(GPIOA, GPIO_MODE_OUTPUT_50_MHZ,
@@ -56,7 +58,7 @@ void usart_setup(void)
usart_enable(USART2);
}
-void gpio_setup(void)
+static void gpio_setup(void)
{
gpio_set(GPIOA, GPIO8);