/**
* Initalize the GPIO unit for the leds
*/
void initLeds(void)
{
GPIO_init(&g_gpio0, COREGPIO_IN_BASE_ADDR, GPIO_APB_32_BITS_BUS);
// DIP Switches
GPIO_config(&g_gpio0, GPIO_0, GPIO_INPUT_MODE);
GPIO_config(&g_gpio0, GPIO_1, GPIO_INPUT_MODE);
GPIO_config(&g_gpio0, GPIO_2, GPIO_INPUT_MODE);
GPIO_config(&g_gpio0, GPIO_3, GPIO_INPUT_MODE);
// Buttons
GPIO_config(&g_gpio0, GPIO_4, GPIO_INPUT_MODE);
GPIO_config(&g_gpio0, GPIO_5, GPIO_INPUT_MODE);
GPIO_config(&g_gpio0, GPIO_6, GPIO_INPUT_MODE);
GPIO_config(&g_gpio0, GPIO_7, GPIO_INPUT_MODE);
// LEDs
GPIO_config(&g_gpio0, GPIO_8, GPIO_OUTPUT_MODE);
GPIO_config(&g_gpio0, GPIO_9, GPIO_OUTPUT_MODE);
GPIO_config(&g_gpio0, GPIO_10, GPIO_OUTPUT_MODE);
GPIO_config(&g_gpio0, GPIO_11, GPIO_OUTPUT_MODE);
GPIO_config(&g_gpio0, GPIO_12, GPIO_OUTPUT_MODE);
GPIO_config(&g_gpio0, GPIO_13, GPIO_OUTPUT_MODE);
GPIO_config(&g_gpio0, GPIO_14, GPIO_OUTPUT_MODE);
GPIO_config(&g_gpio0, GPIO_15, GPIO_OUTPUT_MODE);
GPIO_set_outputs(&g_gpio0, 0xFF00);
led_state = 0;
}
/*------------------------------------------------------------------------------
* Count the number of elapsed milliseconds (SysTick_Handler is called every
* 10mS so the resolution will be 10ms). Rolls over every 49 days or so...
*
* Should be safe to read g_10ms_count from elsewhere.
*/
void SysTick_Handler( void )
{
uint32_t gpio_pattern;
static uint8_t count;
/*
* Toggle GPIO output pattern by doing an exclusive OR of all
* pattern bits with ones.
*/
if(count++>=50)
{
gpio_pattern = GPIO_get_outputs( &g_gpio );
gpio_pattern ^= 0x00000002;
GPIO_set_outputs( &g_gpio, gpio_pattern );
count=0;
}
g_10ms_count += 10;
/*
* For neatness, if we roll over, reset cleanly back to 0 so the count
* always goes up in proper 10s.
*/
if(g_10ms_count < 10)
g_10ms_count = 0;
}
/**
* Set the led state of all leds at once. The state is committed to the GPIO
* directly.
*
* @param state the value to write to the leds
* @param mask the mask value is one for each IO that is not effected by the
* write operation. The value will always be masked with the led
* so that the operation will only effect the leds.
*/
void setLeds(int state, int mask)
{
mask = mask | LED_MASK;
/* TODO: should be atomic, so create a mutex or so */
uint32_t outputs = GPIO_get_outputs(&g_gpio0);
outputs = (outputs & mask) | (state & ~mask);
GPIO_set_outputs(&g_gpio0, outputs);
/* end of critical section */
}
void writeGpio(uint32_t value)
{
GPIO_set_outputs(&g_gpio0, value);
uint32_t result = GPIO_get_outputs(&g_gpio0);
dbprintf("[GPIO] write 0x%08x, read 0x%08x\n", value, result);
}
