From d9c3fba928162e7a89349f8b160eb479ad41cbea Mon Sep 17 00:00:00 2001 From: Nathaniel Graff Date: Thu, 7 Mar 2019 09:29:05 -0800 Subject: Remove legacy examples Signed-off-by: Nathaniel Graff --- software/demo_gpio/.gitignore | 1 - software/demo_gpio/Makefile | 9 -- software/demo_gpio/demo_gpio.c | 252 ----------------------------------------- 3 files changed, 262 deletions(-) delete mode 100644 software/demo_gpio/.gitignore delete mode 100644 software/demo_gpio/Makefile delete mode 100644 software/demo_gpio/demo_gpio.c (limited to 'software/demo_gpio') diff --git a/software/demo_gpio/.gitignore b/software/demo_gpio/.gitignore deleted file mode 100644 index 35566c7..0000000 --- a/software/demo_gpio/.gitignore +++ /dev/null @@ -1 +0,0 @@ -demo_gpio diff --git a/software/demo_gpio/Makefile b/software/demo_gpio/Makefile deleted file mode 100644 index b181c5f..0000000 --- a/software/demo_gpio/Makefile +++ /dev/null @@ -1,9 +0,0 @@ -TARGET = demo_gpio -CFLAGS += -O2 -fno-builtin-printf -DUSE_PLIC -DUSE_M_TIME - -BSP_BASE = ../../bsp - -C_SRCS += demo_gpio.c -C_SRCS += $(BSP_BASE)/drivers/plic/plic_driver.c - -include $(BSP_BASE)/env/common.mk diff --git a/software/demo_gpio/demo_gpio.c b/software/demo_gpio/demo_gpio.c deleted file mode 100644 index 8fe03e1..0000000 --- a/software/demo_gpio/demo_gpio.c +++ /dev/null @@ -1,252 +0,0 @@ -// See LICENSE for license details. - -#include -#include -#include "platform.h" -#include -#include "plic/plic_driver.h" -#include "encoding.h" -#include -#include "stdatomic.h" - -void reset_demo (void); - -// Structures for registering different interrupt handlers -// for different parts of the application. -typedef void (*function_ptr_t) (void); - -void no_interrupt_handler (void) {}; - -function_ptr_t g_ext_interrupt_handlers[PLIC_NUM_INTERRUPTS]; - - -// Instance data for the PLIC. - -plic_instance_t g_plic; - - -/*Entry Point for PLIC Interrupt Handler*/ -void handle_m_ext_interrupt(){ - plic_source int_num = PLIC_claim_interrupt(&g_plic); - if ((int_num >=1 ) && (int_num < PLIC_NUM_INTERRUPTS)) { - g_ext_interrupt_handlers[int_num](); - } - else { - exit(1 + (uintptr_t) int_num); - } - PLIC_complete_interrupt(&g_plic, int_num); -} - - -/*Entry Point for Machine Timer Interrupt Handler*/ -void handle_m_time_interrupt(){ - - clear_csr(mie, MIP_MTIP); - - // Reset the timer for 3s in the future. - // This also clears the existing timer interrupt. - - volatile uint64_t * mtime = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME); - volatile uint64_t * mtimecmp = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP); - uint64_t now = *mtime; - uint64_t then = now + 2 * RTC_FREQ; - *mtimecmp = then; - - // read the current value of the LEDS and invert them. - 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); - -} - - -const char * instructions_msg = " \ -\n\ - SIFIVE, INC.\n\ -\n\ - 5555555555555555555555555\n\ - 5555 5555\n\ - 5555 5555\n\ - 5555 5555\n\ - 5555 5555555555555555555555\n\ - 5555 555555555555555555555555\n\ - 5555 5555\n\ - 5555 5555\n\ - 5555 5555\n\ -5555555555555555555555555555 55555\n\ - 55555 555555555 55555\n\ - 55555 55555 55555\n\ - 55555 5 55555\n\ - 55555 55555\n\ - 55555 55555\n\ - 55555 55555\n\ - 55555 55555\n\ - 55555 55555\n\ - 555555555\n\ - 55555\n\ - 5\n\ -\n\ -SiFive E-Series Software Development Kit 'demo_gpio' program.\n\ -Every 2 second, the Timer Interrupt will invert the LEDs.\n\ -(Arty Dev Kit Only): Press Buttons 0, 1, 2 to Set the LEDs.\n\ -Pin 19 (HiFive1) or A5 (Arty Dev Kit) is being bit-banged\n\ -for GPIO speed demonstration.\n\ -\n\ - "; - -void print_instructions() { - - write (STDOUT_FILENO, instructions_msg, strlen(instructions_msg)); - -} - -#ifdef HAS_BOARD_BUTTONS -void button_0_handler(void) { - - // Red LED on - 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); - -}; - -void button_1_handler(void) { - - // Green LED On - 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); - -}; - - -void button_2_handler(void) { - - // Blue LED On - GPIO_REG(GPIO_OUTPUT_VAL) |= (1 << BLUE_LED_OFFSET); - - GPIO_REG(GPIO_RISE_IP) = (0x1 << BUTTON_2_OFFSET); - -}; -#endif - -void reset_demo (){ - - // Disable the machine & timer interrupts until setup is done. - - clear_csr(mie, MIP_MEIP); - clear_csr(mie, MIP_MTIP); - - for (int ii = 0; ii < PLIC_NUM_INTERRUPTS; ii ++){ - g_ext_interrupt_handlers[ii] = no_interrupt_handler; - } - -#ifdef HAS_BOARD_BUTTONS - g_ext_interrupt_handlers[INT_DEVICE_BUTTON_0] = button_0_handler; - g_ext_interrupt_handlers[INT_DEVICE_BUTTON_1] = button_1_handler; - g_ext_interrupt_handlers[INT_DEVICE_BUTTON_2] = button_2_handler; -#endif - - print_instructions(); - -#ifdef HAS_BOARD_BUTTONS - - // Have to enable the interrupt both at the GPIO level, - // and at the PLIC level. - PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_0); - PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_1); - PLIC_enable_interrupt (&g_plic, INT_DEVICE_BUTTON_2); - - // Priority must be set > 0 to trigger the interrupt. - PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_0, 1); - PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_1, 1); - PLIC_set_priority(&g_plic, INT_DEVICE_BUTTON_2, 1); - - GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_0_OFFSET); - GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_1_OFFSET); - GPIO_REG(GPIO_RISE_IE) |= (1 << BUTTON_2_OFFSET); - -#endif - - // Set the machine timer to go off in 3 seconds. - // The - volatile uint64_t * mtime = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIME); - volatile uint64_t * mtimecmp = (uint64_t*) (CLINT_CTRL_ADDR + CLINT_MTIMECMP); - uint64_t now = *mtime; - uint64_t then = now + 2*RTC_FREQ; - *mtimecmp = then; - - // Enable the Machine-External bit in MIE - set_csr(mie, MIP_MEIP); - - // Enable the Machine-Timer bit in MIE - set_csr(mie, MIP_MTIP); - - // Enable interrupts in general. - set_csr(mstatus, MSTATUS_MIE); -} - -int main(int argc, char **argv) -{ - // Set up the GPIOs such that the LED GPIO - // can be used as both Inputs and Outputs. - - -#ifdef HAS_BOARD_BUTTONS - 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 - - 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)) ; - - - // For Bit-banging with Atomics demo. - - uint32_t bitbang_mask = 0; -#ifdef _SIFIVE_HIFIVE1_H - bitbang_mask = (1 << PIN_19_OFFSET); -#else -#ifdef _SIFIVE_COREPLEXIP_ARTY_H - bitbang_mask = (0x1 << JA_0_OFFSET); -#endif -#endif - - GPIO_REG(GPIO_OUTPUT_EN) |= bitbang_mask; - - /************************************************************************** - * Set up the PLIC - * - *************************************************************************/ - PLIC_init(&g_plic, - PLIC_CTRL_ADDR, - PLIC_NUM_INTERRUPTS, - PLIC_NUM_PRIORITIES); - - reset_demo(); - - /************************************************************************** - * Demonstrate fast GPIO bit-banging. - * One can bang it faster than this if you know - * the entire OUTPUT_VAL that you want to write, but - * Atomics give a quick way to control a single bit. - *************************************************************************/ - // For Bit-banging with Atomics demo. - - while (1){ - atomic_fetch_xor_explicit(&GPIO_REG(GPIO_OUTPUT_VAL), bitbang_mask, memory_order_relaxed); - } - - return 0; - -} -- cgit v1.2.3