void gpio_irq_set(gpio_irq_t *obj, gpio_irq_event event, uint32_t enable)
{
uint32_t pin_index = NU_PINNAME_TO_PIN(obj->pin);
uint32_t port_index = NU_PINNAME_TO_PORT(obj->pin);
GPIO_T *gpio_base = NU_PORT_BASE(port_index);
switch (event) {
case IRQ_RISE:
if (enable) {
GPIO_EnableInt(gpio_base, pin_index, GPIO_INT_RISING);
}
else {
gpio_base->INTEN &= ~(GPIO_INT_RISING << pin_index);
}
break;
case IRQ_FALL:
if (enable) {
GPIO_EnableInt(gpio_base, pin_index, GPIO_INT_FALLING);
}
else {
gpio_base->INTEN &= ~(GPIO_INT_FALLING << pin_index);
}
break;
}
}
/**
* Configure pin pull-up/pull-down
*/
void pin_mode(PinName pin, PinMode mode)
{
MBED_ASSERT(pin != (PinName)NC);
uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
uint32_t port_index = NU_PINNAME_TO_PORT(pin);
GPIO_T *gpio_base = NU_PORT_BASE(port_index);
uint32_t mode_intern = GPIO_MODE_INPUT;
switch (mode) {
case PullUp:
mode_intern = GPIO_MODE_INPUT;
break;
case PullDown:
case PullNone:
// NOTE: Not support
return;
case PushPull:
mode_intern = GPIO_MODE_OUTPUT;
break;
case OpenDrain:
mode_intern = GPIO_MODE_OPEN_DRAIN;
break;
case Quasi:
mode_intern = GPIO_MODE_QUASI;
break;
}
GPIO_SetMode(gpio_base, 1 << pin_index, mode_intern);
}
/**
* Configure pin multi-function
*/
void pin_function(PinName pin, int data)
{
MBED_ASSERT(pin != (PinName)NC);
uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
uint32_t port_index = NU_PINNAME_TO_PORT(pin);
__IO uint32_t *GPx_MFPx = ((__IO uint32_t *) &SYS->GPA_MFPL) + port_index * 2 + (pin_index / 8);
uint32_t MFP_Msk = NU_MFP_MSK(pin_index);
// E.g.: SYS->GPA_MFPL = (SYS->GPA_MFPL & (~SYS_GPA_MFPL_PA0MFP_Msk) ) | SYS_GPA_MFPL_PA0MFP_SC0_CD ;
*GPx_MFPx = (*GPx_MFPx & (~MFP_Msk)) | data;
}
void gpio_irq_free(gpio_irq_t *obj)
{
uint32_t pin_index = NU_PINNAME_TO_PIN(obj->pin);
uint32_t port_index = NU_PINNAME_TO_PORT(obj->pin);
struct nu_gpio_irq_var *var = gpio_irq_var_arr + port_index;
NVIC_DisableIRQ(var->irq_n);
NU_PORT_BASE(port_index)->INTEN = 0;
MBED_ASSERT(pin_index < NU_MAX_PIN_PER_PORT);
var->obj_arr[pin_index] = NULL;
}
/**
* Configure pin pull-up/pull-down
*/
void pin_mode(PinName pin, PinMode mode)
{
MBED_ASSERT(pin != (PinName)NC);
uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
uint32_t port_index = NU_PINNAME_TO_PORT(pin);
GPIO_T *gpio_base = NU_PORT_BASE(port_index);
uint32_t mode_intern = GPIO_MODE_INPUT;
switch (mode) {
case InputOnly:
mode_intern = GPIO_MODE_INPUT;
break;
case PushPullOutput:
mode_intern = GPIO_MODE_OUTPUT;
break;
case OpenDrain:
mode_intern = GPIO_MODE_OPEN_DRAIN;
break;
case QuasiBidirectional:
mode_intern = GPIO_MODE_QUASI;
break;
default:
/* H/W doesn't support separate configuration for input pull mode/direction.
* We expect upper layer would have translated input pull mode/direction
* to I/O mode */
return;
}
GPIO_SetMode(gpio_base, 1 << pin_index, mode_intern);
/* Invalid combinations of PinMode/PinDirection
*
* We assume developer would avoid the following combinations of PinMode/PinDirection
* which are invalid:
* 1. InputOnly/PIN_OUTPUT
* 2. PushPullOutput/PIN_INPUT
*/
}
/**
* Configure pin multi-function
*/
void pin_function(PinName pin, int data)
{
MBED_ASSERT(pin != (PinName)NC);
uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
uint32_t port_index = NU_PINNAME_TO_PORT(pin);
__IO uint32_t *GPx_MFPx = ((__IO uint32_t *) &SYS->GPA_MFPL) + port_index * 2 + (pin_index / 8);
//uint32_t MFP_Pos = NU_MFP_POS(pin_index);
uint32_t MFP_Msk = NU_MFP_MSK(pin_index);
// E.g.: SYS->GPA_MFPL = (SYS->GPA_MFPL & (~SYS_GPA_MFPL_PA0MFP_Msk) ) | SYS_GPA_MFPL_PA0MFP_SC0_CD ;
*GPx_MFPx = (*GPx_MFPx & (~MFP_Msk)) | data;
// [TODO] Disconnect JTAG-DP + SW-DP signals.
// Warning: Need to reconnect under reset
//if ((pin == PA_13) || (pin == PA_14)) {
//
//}
//if ((pin == PA_15) || (pin == PB_3) || (pin == PB_4)) {
//
//}
}
int gpio_irq_init(gpio_irq_t *obj, PinName pin, gpio_irq_handler handler, uint32_t id)
{
if (pin == NC) {
return -1;
}
uint32_t pin_index = NU_PINNAME_TO_PIN(pin);
uint32_t port_index = NU_PINNAME_TO_PORT(pin);
if (pin_index >= NU_MAX_PIN_PER_PORT || port_index >= NU_MAX_PORT) {
return -1;
}
obj->pin = pin;
obj->irq_handler = (uint32_t) handler;
obj->irq_id = id;
GPIO_T *gpio_base = NU_PORT_BASE(port_index);
//gpio_set(pin);
#if NUC472_GPIO_IRQ_DEBOUNCE_ENABLE
// Configure de-bounce clock source and sampling cycle time
GPIO_SET_DEBOUNCE_TIME(NUC472_GPIO_IRQ_DEBOUNCE_CLOCK_SOURCE, NUC472_GPIO_IRQ_DEBOUNCE_SAMPLE_RATE);
GPIO_ENABLE_DEBOUNCE(gpio_base, 1 << pin_index);
#else
GPIO_DISABLE_DEBOUNCE(gpio_base, 1 << pin_index);
#endif
struct nu_gpio_irq_var *var = gpio_irq_var_arr + port_index;
var->obj_arr[pin_index] = obj;
// NOTE: InterruptIn requires IRQ enabled by default.
gpio_irq_enable(obj);
return 0;
}
