int gpio_request(unsigned gpio, const char *label)
{
if (check_gpio(gpio) < 0)
return -EINVAL;
/*
* Allow that the identical GPIO can
* be requested from the same driver twice
* Do nothing and return -
*/
if (cmp_label(gpio, label) == 0)
return 0;
if (unlikely(is_reserved(gpio, gpio, 1))) {
printf("bfin-gpio: GPIO %d is already reserved by %s !\n",
gpio, get_label(gpio));
return -EBUSY;
}
if (unlikely(is_reserved(peri, gpio, 1))) {
printf("bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
gpio, get_label(gpio));
return -EBUSY;
}
else { /* Reset POLAR setting when acquiring a gpio for the first time */
set_gpio_polar(gpio, 0);
}
reserve(gpio, gpio);
set_label(gpio, label);
port_setup(gpio, GPIO_USAGE);
return 0;
}
int special_gpio_request(unsigned gpio, const char *label)
{
/*
* Allow that the identical GPIO can
* be requested from the same driver twice
* Do nothing and return -
*/
if (cmp_label(gpio, label) == 0)
return 0;
if (unlikely(is_reserved(special_gpio, gpio, 1))) {
printf("bfin-gpio: GPIO %d is already reserved by %s !\n",
gpio, get_label(gpio));
return -EBUSY;
}
if (unlikely(is_reserved(peri, gpio, 1))) {
printf("bfin-gpio: GPIO %d is already reserved as Peripheral by %s !\n",
gpio, get_label(gpio));
return -EBUSY;
}
reserve(special_gpio, gpio);
reserve(peri, gpio);
set_label(gpio, label);
port_setup(gpio, GPIO_USAGE);
return 0;
}
int main(void)
{
int i = 0;
uint8_t stat;
char buf[10];
char i_buf[33];
port_setup();
uart_init();
stdout = stdin = &uart_str;
spi_init();
printf("IQRF v1.0 Press enter...\n");
for(;;) {
if (fgets(buf, sizeof buf - 1, stdin) == NULL)
break;
iqrf_send_byte(buf[0]);
if (fRxIQRF) {
for (i = 0; i < fRxIQRF; i++)
sprintf(&i_buf[i], "%c", iqrfRx[i]);
i_buf[fRxIQRF] = '\0';
printf("%s\n", i_buf);
fRxIQRF = 0;
}
}
return 0;
}
static void
endless_loop(void)
{
val_context_t *context;
/*
* signal handlers to exit gracefully
*/
#ifdef SIGTERM
signal(SIGTERM, sig_shutdown);
#endif
#ifdef SIGINT
signal(SIGINT, sig_shutdown);
#endif
/*
* open a port and process incoming packets
*/
port_setup(1153);
if (VAL_NO_ERROR != val_create_context(NULL, &context)) {
val_log(NULL, LOG_ERR, "Cannot create validator context. Exiting.");
return;
}
while (!done) {
wait_for_packet();
process_packet(context);
}
val_free_context(context);
val_free_validator_state();
}
/* If we are booting from SPI and our board lacks a strong enough pull up,
* the core can reset and execute the bootrom faster than the resistor can
* pull the signal logically high. To work around this (common) error in
* board design, we explicitly set the pin back to GPIO mode, force /CS
* high, and wait for the electrons to do their thing.
*
* This function only makes sense to be called from reset code, but it
* lives here as we need to force all the GPIO states w/out going through
* BUG() checks and such.
*/
void bfin_reset_boot_spi_cs(unsigned short pin)
{
unsigned short gpio = P_IDENT(pin);
port_setup(gpio, GPIO_USAGE);
gpio_array[gpio_bank(gpio)]->data_set = gpio_bit(gpio);
AWA_DUMMY_READ(data_set);
udelay(1);
}
int peripheral_request(unsigned short per, const char *label)
{
unsigned short ident = P_IDENT(per);
/*
* Don't cares are pins with only one dedicated function
*/
if (per & P_DONTCARE)
return 0;
if (!(per & P_DEFINED))
return -ENODEV;
BUG_ON(ident >= MAX_RESOURCES);
/* If a pin can be muxed as either GPIO or peripheral, make
* sure it is not already a GPIO pin when we request it.
*/
if (unlikely(!check_gpio(ident) && is_reserved(gpio, ident, 1))) {
printf("%s: Peripheral %d is already reserved as GPIO by %s !\n",
__func__, ident, get_label(ident));
return -EBUSY;
}
if (unlikely(is_reserved(peri, ident, 1))) {
/*
* Pin functions like AMC address strobes my
* be requested and used by several drivers
*/
if (!(per & P_MAYSHARE)) {
/*
* Allow that the identical pin function can
* be requested from the same driver twice
*/
if (cmp_label(ident, label) == 0)
goto anyway;
printf("%s: Peripheral %d function %d is already reserved by %s !\n",
__func__, ident, P_FUNCT2MUX(per), get_label(ident));
return -EBUSY;
}
}
anyway:
reserve(peri, ident);
portmux_setup(per);
port_setup(ident, PERIPHERAL_USAGE);
set_label(ident, label);
return 0;
}
TM1638::TM1638()
: _dotMask(0)
{
port_setup();
send_cmd(TM_DATA_CMD | TM_WRITE_DISP);
send_cmd(TM_DISP_CTRL | TM_DISP_ENABLE | TM_DISP_PWM_MASK);
clear();
clearLEDs();
}
void peripheral_free(unsigned short per)
{
unsigned short ident = P_IDENT(per);
if (per & P_DONTCARE)
return;
if (!(per & P_DEFINED))
return;
if (unlikely(!is_reserved(peri, ident, 0)))
return;
if (!(per & P_MAYSHARE))
port_setup(ident, GPIO_USAGE);
unreserve(peri, ident);
set_label(ident, "free");
}
