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samd/samd_isr: Change the way a Sercom ISR is registered and called. 

Code size diff: +12 Bytes
BSS diff: -12 Bytes
RAM usage: +16 Bytes
Speed increase: a few clock cycles per call
Style improvement: ++
This commit is contained in:
robert-hh 2022-06-06 10:20:44 +02:00 committed by Damien George
parent 009c51c13f
commit 3625388d8c
5 changed files with 11 additions and 18 deletions
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2
ports/samd/machine_i2c.c
View File

@ -188,7 +188,7 @@ mp_obj_t machine_i2c_make_new(const mp_obj_type_t *type, size_t n_args, size_t n
i2c->I2CM.BAUD.reg = get_apb_freq() / (2 * self->freq) - 5 - (get_apb_freq() / 1000000) * RISETIME_NS / 2000;
// Enable interrupts
sercom_register_irq(self->id, SERCOM_IRQ_TYPE_SPI);
sercom_register_irq(self->id, &common_i2c_irq_handler);
#if defined(MCU_SAMD21)
NVIC_EnableIRQ(SERCOM0_IRQn + self->id);
#elif defined(MCU_SAMD51)

2
ports/samd/machine_spi.c
View File

@ -218,7 +218,7 @@ STATIC void machine_spi_init(mp_obj_base_t *self_in, size_t n_args, const mp_obj
#elif defined(MCU_SAMD51)
NVIC_EnableIRQ(SERCOM0_0_IRQn + 4 * self->id + 2);
#endif
sercom_register_irq(self->id, SERCOM_IRQ_TYPE_SPI);
sercom_register_irq(self->id, &common_spi_irq_handler);
}
sercom_enable(spi, 1);

2
ports/samd/machine_uart.c
View File

@ -281,7 +281,7 @@ STATIC mp_obj_t machine_uart_init_helper(machine_uart_obj_t *self, size_t n_args
#elif defined(MCU_SAMD51)
NVIC_EnableIRQ(SERCOM0_0_IRQn + 4 * self->id + 2);
#endif
sercom_register_irq(self->id, SERCOM_IRQ_TYPE_UART);
sercom_register_irq(self->id, &common_uart_irq_handler);
sercom_enable(uart, 1);
}

18
ports/samd/samd_isr.c
View File

@ -108,21 +108,17 @@ void PendSV_Handler(void) {
}
static uint8_t sercom_irq_type[SERCOM_INST_NUM] = {};
void (*sercom_irq_handler_table[SERCOM_INST_NUM])(int num) = {};
void (*sercom_irq_handler_table[])(int num) = {
common_uart_irq_handler,
common_spi_irq_handler,
common_i2c_irq_handler
};
void sercom_register_irq(int sercom_id, int mode) {
sercom_irq_type[sercom_id] = mode;
void sercom_register_irq(int sercom_id, void (*sercom_irq_handler)) {
if (sercom_id < SERCOM_INST_NUM) {
sercom_irq_handler_table[sercom_id] = sercom_irq_handler;
}
}
static inline void common_sercom_irq_handler(int sercom_id) {
if (sercom_irq_handler_table[sercom_irq_type[sercom_id]]) {
sercom_irq_handler_table[sercom_irq_type[sercom_id]](sercom_id);
if (sercom_irq_handler_table[sercom_id]) {
sercom_irq_handler_table[sercom_id](sercom_id);
}
}

5
ports/samd/samd_soc.h
View File

@ -39,11 +39,8 @@ void USB_1_Handler_wrapper(void);
void USB_2_Handler_wrapper(void);
void USB_3_Handler_wrapper(void);
void common_uart_irq_handler(int uart_nr);
void common_spi_irq_handler(int spi_nr);
void common_i2c_irq_handler(int i2c_nr);
void sercom_enable(Sercom *spi, int state);
void sercom_register_irq(int sercom_id, int mode);
void sercom_register_irq(int sercom_id, void (*sercom_irq_handler));
#define SERCOM_IRQ_TYPE_UART (0)
#define SERCOM_IRQ_TYPE_SPI (1)