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stm32 button: use more idiomatic GPIO read

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Using GPIOA_IDR directly looks a bit arcane, and the example can benefit
from introducing gpio_get() and how to use it.  The stm32f0-discovery
example already does it like this.
This commit is contained in:
Roland Hieber
2016-10-08 23:30:32 +02:00
parent 4dfa31f9f8
commit bb8f4699da
6 changed files with 6 additions and 24 deletions
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5
examples/stm32/f1/stm32-h103/button/button.c
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@@ -23,8 +23,6 @@
#include <libopencm3/cm3/nvic.h>
#include <libopencm3/stm32/exti.h>
uint16_t exti_line_state;
/* Set STM32 to 72 MHz. */
static void clock_setup(void)
{
@@ -62,8 +60,7 @@ int main(void)
while (1) {
gpio_toggle(GPIOC, GPIO12);
exti_line_state = GPIOA_IDR;
if ((exti_line_state & (1 << 0)) != 0) {
if (gpio_get(GPIOA, GPIO0)) {
for (i = 0; i < 800000; i++) /* Wait a bit. */
__asm__("nop");
}

5
examples/stm32/f1/stm32vl-discovery/button/button.c
View File

@@ -21,8 +21,6 @@
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
uint16_t exti_line_state;
/* Set STM32 to 24 MHz. */
static void clock_setup(void)
{
@@ -61,8 +59,7 @@ int main(void)
gpio_toggle(GPIOC, GPIO9);
/* Upon button press, blink more slowly. */
exti_line_state = GPIOA_IDR;
if ((exti_line_state & (1 << 0)) != 0) {
if (gpio_get(GPIOA, GPIO0)) {
for (i = 0; i < 800000; i++) /* Wait a bit. */
__asm__("nop");
}

5
examples/stm32/f1/waveshare-open103r/button/button.c
View File

@@ -22,8 +22,6 @@
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
uint16_t exti_line_state;
/* Set STM32 to 24 MHz. */
static void clock_setup(void)
{
@@ -64,8 +62,7 @@ int main(void)
gpio_toggle(GPIOC, GPIO9);
/* Upon button press, blink more slowly. */
exti_line_state = GPIOA_IDR;
if ((exti_line_state & (1 << 9)) == 0) {
if (gpio_get(GPIOA, GPIO9)) {
for (i = 0; i < 800000; i++) /* Wait a bit. */
__asm__("nop");
}

5
examples/stm32/f3/stm32f3-discovery/button/button.c
View File

@@ -24,8 +24,6 @@
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
uint16_t exti_line_state;
/* Set STM32 to 64 MHz. */
static void clock_setup(void)
{
@@ -64,8 +62,7 @@ int main(void)
gpio_toggle(GPIOE, GPIO11);
/* Upon button press, blink more slowly. */
exti_line_state = GPIOA_IDR;
if ((exti_line_state & (1 << 0)) != 0) {
if (gpio_get(GPIOA, GPIO0)) {
for (i = 0; i < 3000000; i++) /* Wait a bit. */
__asm__("nop");
}

5
examples/stm32/f4/stm32f4-discovery/button/button.c
View File

@@ -22,8 +22,6 @@
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
uint16_t exti_line_state;
/* Set STM32 to 168 MHz. */
static void clock_setup(void)
{
@@ -62,8 +60,7 @@ int main(void)
gpio_toggle(GPIOD, GPIO12);
/* Upon button press, blink more slowly. */
exti_line_state = GPIOA_IDR;
if ((exti_line_state & (1 << 0)) != 0) {
if (gpio_get(GPIOA, GPIO0)) {
for (i = 0; i < 3000000; i++) { /* Wait a bit. */
__asm__("nop");
}

5
examples/stm32/f4/stm32f429i-discovery/button/button.c
View File

@@ -22,8 +22,6 @@
#include <libopencm3/stm32/rcc.h>
#include <libopencm3/stm32/gpio.h>
uint16_t exti_line_state;
/* Set STM32 to 168 MHz. */
static void clock_setup(void)
{
@@ -62,8 +60,7 @@ int main(void)
gpio_toggle(GPIOG, GPIO13);
/* Upon button press, blink more slowly. */
exti_line_state = GPIOA_IDR;
if ((exti_line_state & (1 << 0)) != 0) {
if (gpio_get(GPIOA, GPIO0)) {
for (i = 0; i < 3000000; i++) { /* Wait a bit. */
__asm__("nop");
}