diff options
Diffstat (limited to 'software/demo_gpio')
| -rw-r--r-- | software/demo_gpio/demo_gpio.c | 40 |
1 files changed, 18 insertions, 22 deletions
diff --git a/software/demo_gpio/demo_gpio.c b/software/demo_gpio/demo_gpio.c index dec91b5..c780cbe 100644 --- a/software/demo_gpio/demo_gpio.c +++ b/software/demo_gpio/demo_gpio.c @@ -25,12 +25,6 @@ function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS]; plic_instance_t g_plic; -// Simple variables for LEDs, buttons, etc. -volatile unsigned int* g_output_vals = (unsigned int *) (GPIO_BASE_ADDR + GPIO_OUTPUT_VAL); -volatile unsigned int* g_input_vals = (unsigned int *) (GPIO_BASE_ADDR + GPIO_INPUT_VAL); -volatile unsigned int* g_output_en = (unsigned int *) (GPIO_BASE_ADDR + GPIO_OUTPUT_EN); -volatile unsigned int* g_pullup_en = (unsigned int *) (GPIO_BASE_ADDR + GPIO_PULLUP_EN); -volatile unsigned int* g_input_en = (unsigned int *) (GPIO_BASE_ADDR + GPIO_INPUT_EN); /*Entry Point for PLIC Interrupt Handler*/ void handle_m_ext_interrupt(){ @@ -60,12 +54,12 @@ void handle_m_time_interrupt(){ *mtimecmp = then; // read the current value of the LEDS and invert them. - uint32_t leds = *g_output_vals; - - *g_output_vals ^= ((0x1 << RED_LED_OFFSET) | - (0x1 << GREEN_LED_OFFSET) | - (0x1 << BLUE_LED_OFFSET)); + uint32_t leds = GPIO_REG(GPIO_OUTPUT_VAL); + GPIO_REG(GPIO_OUTPUT_VAL) ^= ((0x1 << RED_LED_OFFSET) | + (0x1 << GREEN_LED_OFFSET) | + (0x1 << BLUE_LED_OFFSET)); + // Re-enable the timer interrupt. set_csr(mie, MIP_MTIP); @@ -114,7 +108,7 @@ void print_instructions() { void button_0_handler(void) { // Red LED on - * g_output_vals |= (0x1 << RED_LED_OFFSET); + GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << RED_LED_OFFSET); // Clear the GPIO Pending interrupt by writing 1. GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_0_OFFSET); @@ -124,7 +118,7 @@ void button_0_handler(void) { void button_1_handler(void) { // Green LED On - * g_output_vals |= (1 << GREEN_LED_OFFSET); + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << GREEN_LED_OFFSET); // Clear the GPIO Pending interrupt by writing 1. GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_1_OFFSET); @@ -135,7 +129,7 @@ void button_1_handler(void) { void button_2_handler(void) { // Blue LED On - * g_output_vals |= (1 << BLUE_LED_OFFSET); + GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << BLUE_LED_OFFSET); GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_2_OFFSET); @@ -204,15 +198,15 @@ int main(int argc, char **argv) // can be used as both Inputs and Outputs. #ifdef HAS_BOARD_BUTTONS - * g_output_en &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET)); - * g_pullup_en &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET)); - * g_input_en |= ((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET)); + GPIO_REG(GPIO_OUTPUT_EN) &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET)); + GPIO_REG(GPIO_PULLUP_EN) &= ~((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET)); + GPIO_REG(GPIO_INPUT_EN) |= ((0x1 << BUTTON_0_OFFSET) | (0x1 << BUTTON_1_OFFSET) | (0x1 << BUTTON_2_OFFSET)); #endif - * g_input_en &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ; - * g_output_en |= ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ; - * g_output_vals |= (0x1 << BLUE_LED_OFFSET) ; - * g_output_vals &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)) ; + GPIO_REG(GPIO_INPUT_EN) &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ; + GPIO_REG(GPIO_OUTPUT_EN) |= ((0x1<< RED_LED_OFFSET)| (0x1<< GREEN_LED_OFFSET) | (0x1 << BLUE_LED_OFFSET)) ; + GPIO_REG(GPIO_OUTPUT_VAL) |= (0x1 << BLUE_LED_OFFSET) ; + GPIO_REG(GPIO_OUTPUT_VAL) &= ~((0x1<< RED_LED_OFFSET) | (0x1<< GREEN_LED_OFFSET)) ; /************************************************************************** * Set up the PLIC @@ -225,7 +219,9 @@ int main(int argc, char **argv) reset_demo(); - while (1); + while (1){ + + } return 0; |