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TIM1 GPIO remapping + gpio_port_config_lock().

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Thanks to Philip Court <philip@greenstage.co.nz> for the patch.
This commit is contained in:
Uwe Hermann
2010-12-17 06:04:28 +01:00
parent 9539f3bf06
commit eebbd508fc
2 changed files with 24 additions and 0 deletions
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10
include/libopenstm32/gpio.h
View File

@@ -103,6 +103,15 @@
#define GPIO_TIM1_CH2N GPIO14 /* PB14 */
#define GPIO_TIM1_CH3N GPIO15 /* PB15 */
#define GPIO_TIM1_ETR_REMAP GPIO7 /* PE7 */
#define GPIO_TIM1_CH1_REMAP GPIO9 /* PE9 */
#define GPIO_TIM1_CH2_REMAP GPIO11 /* PE11 */
#define GPIO_TIM1_CH3_REMAP GPIO13 /* PE13 */
#define GPIO_TIM1_CH4_REMAP GPIO14 /* PE14 */
#define GPIO_TIM1_BKIN_REMAP GPIO15 /* PE15 */
#define GPIO_TIM1_CH1N_REMAP GPIO8 /* PE8 */
#define GPIO_TIM1_CH2N_REMAP GPIO10 /* PE10 */
#define GPIO_TIM1_CH3N_REMAP GPIO12 /* PE12 */
/* USART */
#define GPIO_USART3_TX GPIO10 /* PB10 */
#define GPIO_USART3_RX GPIO11 /* PB11 */
@@ -402,5 +411,6 @@ u16 gpio_get(u32 gpioport, u16 gpios);
void gpio_toggle(u32 gpioport, u16 gpios);
u16 gpio_port_read(u32 gpioport);
void gpio_port_write(u32 gpioport, u16 data);
void gpio_port_config_lock(u32 gpioport, u16 gpios);
#endif

14
lib/gpio.c
View File

@@ -106,3 +106,17 @@ void gpio_port_write(u32 gpioport, u16 data)
{
GPIO_ODR(gpioport) = data;
}
void gpio_port_config_lock(u32 gpioport, u16 gpios)
{
u32 reg32;
/* Special "Lock Key Writing Sequence", see datasheet. */
GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */
GPIO_LCKR(gpioport) = ~GPIO_LCKK & gpios; /* Clear LCKK. */
GPIO_LCKR(gpioport) = GPIO_LCKK | gpios; /* Set LCKK. */
reg32 = GPIO_LCKR(gpioport); /* Read LCKK. */
reg32 = GPIO_LCKR(gpioport); /* Read LCKK again. */
/* If (reg32 & GPIO_LCKK) is true, the lock is now active. */
}