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Diffstat (limited to 'examples/stm32/f2/jobygps/usart_printf/usart_printf.c')
-rw-r--r--examples/stm32/f2/jobygps/usart_printf/usart_printf.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/examples/stm32/f2/jobygps/usart_printf/usart_printf.c b/examples/stm32/f2/jobygps/usart_printf/usart_printf.c
index d490e39..e37a952 100644
--- a/examples/stm32/f2/jobygps/usart_printf/usart_printf.c
+++ b/examples/stm32/f2/jobygps/usart_printf/usart_printf.c
@@ -25,7 +25,9 @@
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/f2/rcc.h>
-void clock_setup(void)
+int _write(int file, char *ptr, int len);
+
+static void clock_setup(void)
{
/* Enable clocks on all the peripherals we are going to use. */
rcc_peripheral_enable_clock(&RCC_APB2ENR, RCC_APB2ENR_USART1EN);
@@ -33,7 +35,7 @@ void clock_setup(void)
RCC_AHB1ENR_IOPCEN | RCC_AHB1ENR_IOPAEN);
}
-void usart_setup(void)
+static void usart_setup(void)
{
gpio_mode_setup(GPIOA, GPIO_MODE_AF, GPIO_PUPD_NONE, GPIO9);
gpio_set_af(GPIOA, GPIO_AF7, GPIO9 | GPIO10);
@@ -50,7 +52,7 @@ void usart_setup(void)
usart_enable(USART1);
}
-void gpio_setup(void)
+static void gpio_setup(void)
{
gpio_mode_setup(GPIOC, GPIO_MODE_OUTPUT, GPIO_MODE_OUTPUT, GPIO3);
gpio_set(GPIOC, GPIO3);