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stm: Add a few more GPIO functions to make dealing with the 1802 easier
[fw/altos]
/
src
/
stm
/
stm32l.h
diff --git
a/src/stm/stm32l.h
b/src/stm/stm32l.h
index a20efa8a1b0c31f52bfa5536752f607d36ad4b3a..4f966e3e71f3661d01ce9afd370549ad38803c55 100644
(file)
--- a/
src/stm/stm32l.h
+++ b/
src/stm/stm32l.h
@@
-167,6
+167,12
@@
stm_gpio_set(struct stm_gpio *gpio, int pin, uint8_t value) {
gpio->bsrr = ((uint32_t) (value ^ 1) << (pin + 16)) | ((uint32_t) value << pin);
}
gpio->bsrr = ((uint32_t) (value ^ 1) << (pin + 16)) | ((uint32_t) value << pin);
}
+static inline void
+stm_gpio_set_mask(struct stm_gpio *gpio, uint16_t bits, uint16_t mask) {
+ /* Use the bit set/reset register to do this atomically */
+ gpio->bsrr = ((uint32_t) (~bits & mask) << 16) | ((uint32_t) (bits & mask));
+}
+
static inline void
stm_gpio_set_bits(struct stm_gpio *gpio, uint16_t bits) {
gpio->bsrr = bits;
static inline void
stm_gpio_set_bits(struct stm_gpio *gpio, uint16_t bits) {
gpio->bsrr = bits;