/* PCLK is set to 16MHz (HCLK 32MHz, APB prescaler 2) */
-#define AO_SPI_SPEED_8MHz STM_SPI_CR1_BR_PCLK_2 /* This doesn't appear to work */
+#define AO_SPI_SPEED_8MHz STM_SPI_CR1_BR_PCLK_2
#define AO_SPI_SPEED_4MHz STM_SPI_CR1_BR_PCLK_4
#define AO_SPI_SPEED_2MHz STM_SPI_CR1_BR_PCLK_8
#define AO_SPI_SPEED_1MHz STM_SPI_CR1_BR_PCLK_16
#define AO_SPI_SPEED_125kHz STM_SPI_CR1_BR_PCLK_128
#define AO_SPI_SPEED_62500Hz STM_SPI_CR1_BR_PCLK_256
-#define AO_SPI_SPEED_FAST AO_SPI_SPEED_4MHz
+#define AO_SPI_SPEED_FAST AO_SPI_SPEED_8MHz
/* Companion bus wants something no faster than 200kHz */
void
ao_spi_init(void);
+#define ao_spi_set_cs(reg,mask) ((reg)->bsrr = ((uint32_t) (mask)) << 16)
+#define ao_spi_clr_cs(reg,mask) ((reg)->bsrr = (mask))
+
#define ao_spi_get_mask(reg,mask,bus, speed) do { \
ao_spi_get(bus, speed); \
- (reg)->bsrr = ((uint32_t) mask) << 16; \
+ ao_spi_set_cs(reg,mask); \
} while (0)
#define ao_spi_put_mask(reg,mask,bus) do { \
- (reg)->bsrr = mask; \
+ ao_spi_clr_cs(reg,mask); \
ao_spi_put(bus); \
} while (0)
stm_rcc.ahbenr |= (1 << STM_RCC_AHBENR_GPIOEEN); \
} while (0)
+#define ao_disable_port(port) do { \
+ if ((port) == &stm_gpioa) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOAEN); \
+ else if ((port) == &stm_gpiob) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOBEN); \
+ else if ((port) == &stm_gpioc) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOCEN); \
+ else if ((port) == &stm_gpiod) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIODEN); \
+ else if ((port) == &stm_gpioe) \
+ stm_rcc.ahbenr &= ~(1 << STM_RCC_AHBENR_GPIOEEN); \
+ } while (0)
+
#define ao_gpio_set(port, bit, pin, v) stm_gpio_set(port, bit, v)
stm_moder_set(port, bit, STM_MODER_OUTPUT);\
} while (0)
-#define ao_enable_input(port,bit,mode) do { \
- ao_enable_port(port); \
- stm_moder_set(port, bit, STM_MODER_INPUT); \
+#define ao_gpio_set_mode(port,bit,mode) do { \
if (mode == AO_EXTI_MODE_PULL_UP) \
stm_pupdr_set(port, bit, STM_PUPDR_PULL_UP); \
else if (mode == AO_EXTI_MODE_PULL_DOWN) \
else \
stm_pupdr_set(port, bit, STM_PUPDR_NONE); \
} while (0)
+
+#define ao_enable_input(port,bit,mode) do { \
+ ao_enable_port(port); \
+ stm_moder_set(port, bit, STM_MODER_INPUT); \
+ ao_gpio_set_mode(port, bit, mode); \
+ } while (0)
#define ao_enable_cs(port,bit) do { \
stm_gpio_set((port), bit, 1); \
void
ao_i2c_init(void);
+/* ao_serial_stm.c */
+struct ao_stm_usart {
+ struct ao_fifo rx_fifo;
+ struct ao_fifo tx_fifo;
+ struct stm_usart *reg;
+ uint8_t tx_started;
+};
+
+#if HAS_SERIAL_1
+extern struct ao_stm_usart ao_stm_usart1;
+#endif
+
+#if HAS_SERIAL_2
+extern struct ao_stm_usart ao_stm_usart2;
+#endif
+
+#if HAS_SERIAL_3
+extern struct ao_stm_usart ao_stm_usart3;
+#endif
+
#define ARM_PUSH32(stack, val) (*(--(stack)) = (val))
static inline uint32_t
asm volatile("" ::: "memory");
}
+#if HAS_TASK
static inline void
ao_arch_init_stack(struct ao_task *task, void *start)
{
asm("bx lr");
}
+#define HAS_ARCH_START_SCHEDULER 1
+
+static inline void ao_arch_start_scheduler(void) {
+ uint32_t sp;
+ uint32_t control;
+
+ asm("mrs %0,msp" : "=&r" (sp));
+ asm("msr psp,%0" : : "r" (sp));
+ asm("mrs %0,control" : "=&r" (control));
+ control |= (1 << 1);
+ asm("msr control,%0" : : "r" (control));
+}
+
#define ao_arch_isr_stack()
+#endif
+
#define ao_arch_wait_interrupt() do { \
asm(".global ao_idle_loc\n\twfi\nao_idle_loc:"); \
ao_arch_release_interrupts(); \