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Merge pull request #1031 from bthebaudeau/cc2538-gpio-irqs

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cc2538: gpio: Improve and fix IRQ management
This commit is contained in:
George Oikonomou 2015-05-03 18:42:53 +01:00
commit 2059be3a43
2 changed files with 57 additions and 52 deletions
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76
cpu/cc2538/dev/gpio.c
View File

@ -79,69 +79,41 @@ notify(uint8_t mask, uint8_t port)
}
}
/*---------------------------------------------------------------------------*/
/** \brief Interrupt service routine for Port A */
void
gpio_port_a_isr()
/** \brief Interrupt service routine for Port \a port
* \param port Number between 0 and 3. Port A: 0, Port B: 1, etc.
*/
static void
gpio_port_isr(uint8_t port)
{
uint32_t base;
uint8_t int_status, power_up_int_status;
lpm_exit();
ENERGEST_ON(ENERGEST_TYPE_IRQ);
notify(REG(GPIO_A_BASE + GPIO_MIS), GPIO_A_NUM);
base = GPIO_PORT_TO_BASE(port);
int_status = GPIO_GET_MASKED_INT_STATUS(base);
power_up_int_status = GPIO_GET_POWER_UP_INT_STATUS(port);
GPIO_CLEAR_INTERRUPT(GPIO_A_BASE, 0xFF);
GPIO_CLEAR_POWER_UP_INTERRUPT(GPIO_A_NUM, 0xFF);
notify(int_status | power_up_int_status, port);
GPIO_CLEAR_INTERRUPT(base, int_status);
GPIO_CLEAR_POWER_UP_INTERRUPT(port, power_up_int_status);
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
/*---------------------------------------------------------------------------*/
/** \brief Interrupt service routine for Port B */
void
gpio_port_b_isr()
{
lpm_exit();
ENERGEST_ON(ENERGEST_TYPE_IRQ);
notify(REG(GPIO_B_BASE + GPIO_MIS), GPIO_B_NUM);
GPIO_CLEAR_INTERRUPT(GPIO_B_BASE, 0xFF);
GPIO_CLEAR_POWER_UP_INTERRUPT(GPIO_B_NUM, 0xFF);
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
/*---------------------------------------------------------------------------*/
/** \brief Interrupt service routine for Port C */
void
gpio_port_c_isr()
{
lpm_exit();
ENERGEST_ON(ENERGEST_TYPE_IRQ);
notify(REG(GPIO_C_BASE + GPIO_MIS), GPIO_C_NUM);
GPIO_CLEAR_INTERRUPT(GPIO_C_BASE, 0xFF);
GPIO_CLEAR_POWER_UP_INTERRUPT(GPIO_C_NUM, 0xFF);
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
}
/*---------------------------------------------------------------------------*/
/** \brief Interrupt service routine for Port D */
void
gpio_port_d_isr()
{
lpm_exit();
ENERGEST_ON(ENERGEST_TYPE_IRQ);
notify(REG(GPIO_D_BASE + GPIO_MIS), GPIO_D_NUM);
GPIO_CLEAR_INTERRUPT(GPIO_D_BASE, 0xFF);
GPIO_CLEAR_POWER_UP_INTERRUPT(GPIO_D_NUM, 0xFF);
ENERGEST_OFF(ENERGEST_TYPE_IRQ);
#define GPIO_PORT_ISR(lowercase_port, uppercase_port) \
void \
gpio_port_##lowercase_port##_isr(void) \
{ \
gpio_port_isr(GPIO_##uppercase_port##_NUM); \
}
GPIO_PORT_ISR(a, A)
GPIO_PORT_ISR(b, B)
GPIO_PORT_ISR(c, C)
GPIO_PORT_ISR(d, D)
/*---------------------------------------------------------------------------*/
void
gpio_init()

33
cpu/cc2538/dev/gpio.h
View File

@ -210,6 +210,31 @@ typedef void (* gpio_callback_t)(uint8_t port, uint8_t pin);
#define GPIO_DISABLE_INTERRUPT(PORT_BASE, PIN_MASK) \
do { REG((PORT_BASE) + GPIO_IE) &= ~(PIN_MASK); } while(0)
/** \brief Get raw interrupt status of port with PORT_BASE.
* \param PORT_BASE GPIO Port register offset
* \return Bit-mask reflecting the raw interrupt status of all the port pins
*
* The bits set in the returned bit-mask reflect the status of the interrupts
* trigger conditions detected (raw, before interrupt masking), indicating that
* all the requirements are met, before they are finally allowed to trigger by
* the interrupt mask. The bits cleared indicate that corresponding input pins
* have not initiated an interrupt.
*/
#define GPIO_GET_RAW_INT_STATUS(PORT_BASE) \
REG((PORT_BASE) + GPIO_RIS)
/** \brief Get masked interrupt status of port with PORT_BASE.
* \param PORT_BASE GPIO Port register offset
* \return Bit-mask reflecting the masked interrupt status of all the port pins
*
* The bits set in the returned bit-mask reflect the status of input lines
* triggering an interrupt. The bits cleared indicate that either no interrupt
* has been generated, or the interrupt is masked. This is the state of the
* interrupt after interrupt masking.
*/
#define GPIO_GET_MASKED_INT_STATUS(PORT_BASE) \
REG((PORT_BASE) + GPIO_MIS)
/** \brief Clear interrupt triggering for pins with PIN_MASK of port with
* PORT_BASE.
* \param PORT_BASE GPIO Port register offset
@ -270,6 +295,14 @@ typedef void (* gpio_callback_t)(uint8_t port, uint8_t pin);
do { REG(GPIO_PORT_TO_BASE(PORT) + GPIO_PI_IEN) &= \
~((PIN_MASK) << ((PORT) << 3)); } while(0)
/** \brief Get power-up interrupt status of port PORT.
* \param PORT GPIO Port (not port base address)
* \return Bit-mask reflecting the power-up interrupt status of all the port
* pins
*/
#define GPIO_GET_POWER_UP_INT_STATUS(PORT) \
((REG(GPIO_PORT_TO_BASE(PORT) + GPIO_IRQ_DETECT_ACK) >> ((PORT) << 3)) & 0xFF)
/** \brief Clear power-up interrupt triggering for pins with PIN_MASK of port
* PORT.
* \param PORT GPIO Port (not port base address)