wait for interrupt instead of time delay
This commit is contained in:
Binary file not shown.
85
raven_spn/src/init.h
Normal file
85
raven_spn/src/init.h
Normal file
@@ -0,0 +1,85 @@
|
||||
#ifndef SRC_INIT_H_
|
||||
#define SRC_INIT_H_
|
||||
|
||||
#include <cstdio>
|
||||
#include <array>
|
||||
|
||||
#include "delay.h"
|
||||
#include "bsp.h"
|
||||
#include "plic/plic_driver.h"
|
||||
|
||||
typedef void (*function_ptr_t) (void);
|
||||
//! Instance data for the PLIC.
|
||||
plic_instance_t g_plic;
|
||||
std::array<function_ptr_t,PLIC_NUM_INTERRUPTS> g_ext_interrupt_handlers;
|
||||
bool hw_interrupt{false};
|
||||
|
||||
|
||||
/*! \brief external interrupt handler
|
||||
*
|
||||
* routes the peripheral interrupts to the the respective handler
|
||||
*
|
||||
*/
|
||||
extern "C" 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);
|
||||
}
|
||||
/*! \brief dummy interrupt handler
|
||||
*
|
||||
*/
|
||||
void no_interrupt_handler (void) {};
|
||||
/*! \brief configure the per-interrupt handler
|
||||
*
|
||||
*/
|
||||
void configure_irq(size_t irq_num, function_ptr_t handler, unsigned char prio=1) {
|
||||
g_ext_interrupt_handlers[irq_num] = handler;
|
||||
// Priority must be set > 0 to trigger the interrupt.
|
||||
PLIC_set_priority(&g_plic, irq_num, prio);
|
||||
// Have to enable the interrupt both at the GPIO level, and at the PLIC level.
|
||||
PLIC_enable_interrupt(&g_plic, irq_num);
|
||||
}
|
||||
|
||||
static void msi_interrupt_handler(){
|
||||
hw_interrupt = true;
|
||||
}
|
||||
|
||||
void wait_for_interrupt() {
|
||||
while (!hw_interrupt) {
|
||||
delayUS(1);
|
||||
};
|
||||
hw_interrupt = false;
|
||||
}
|
||||
|
||||
/*!\brief initializes platform
|
||||
*
|
||||
*/
|
||||
void platform_init(){
|
||||
// UART init section TODO: clarify how to get the functions from init.c?
|
||||
GPIO_REG(GPIO_IOF_SEL) &= ~IOF0_UART0_MASK;
|
||||
GPIO_REG(GPIO_IOF_EN) |= IOF0_UART0_MASK;
|
||||
UART0_REG(UART_REG_TXCTRL) |= UART_TXEN;
|
||||
|
||||
F_CPU=PRCI_measure_mcycle_freq(20, RTC_FREQ);
|
||||
printf("core freq at %d Hz\n", F_CPU);
|
||||
// initialie interupt & trap handling
|
||||
write_csr(mtvec, &trap_entry);
|
||||
|
||||
PLIC_init(&g_plic, PLIC_CTRL_ADDR, PLIC_NUM_INTERRUPTS, PLIC_NUM_PRIORITIES, 0);
|
||||
// Disable the machine & timer interrupts until setup is done.
|
||||
clear_csr(mie, MIP_MEIP);
|
||||
clear_csr(mie, MIP_MTIP);
|
||||
for (auto& h:g_ext_interrupt_handlers) h=no_interrupt_handler;
|
||||
configure_irq(2, msi_interrupt_handler);
|
||||
// Enable interrupts in general.
|
||||
set_csr(mstatus, MSTATUS_MIE);
|
||||
// Enable the Machine-External bit in MIE
|
||||
set_csr(mie, MIP_MEIP);
|
||||
|
||||
hw_interrupt = false;
|
||||
}
|
||||
|
||||
#endif /* SRC_INIT_H_ */
|
||||
@@ -1,88 +1,16 @@
|
||||
#include "raven_spn.h"
|
||||
#include "spn_regs.h"
|
||||
#include "delay.h"
|
||||
#include "bsp.h"
|
||||
#include "plic/plic_driver.h"
|
||||
#include "init.h"
|
||||
|
||||
#include <cstdio>
|
||||
#include <cstdint>
|
||||
#include <array>
|
||||
#include <cmath>
|
||||
#include <cmath> // log
|
||||
|
||||
using spn =spn_regs<0x90000000>;
|
||||
|
||||
#define IOF_ENABLE_TERMINAL (0x30000)
|
||||
|
||||
// huge arrays of XSPN input and referance data
|
||||
extern std::array<uint8_t, 50000> input_data;
|
||||
extern std::array<double, 10000> ref_data;
|
||||
constexpr auto ln2 = std::log(2);
|
||||
|
||||
|
||||
typedef void (*function_ptr_t) (void);
|
||||
//! Instance data for the PLIC.
|
||||
plic_instance_t g_plic;
|
||||
std::array<function_ptr_t,PLIC_NUM_INTERRUPTS> g_ext_interrupt_handlers;
|
||||
|
||||
|
||||
/*! \brief external interrupt handler
|
||||
*
|
||||
* routes the peripheral interrupts to the the respective handler
|
||||
*
|
||||
*/
|
||||
extern "C" 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);
|
||||
}
|
||||
/*! \brief dummy interrupt handler
|
||||
*
|
||||
*/
|
||||
void no_interrupt_handler (void) {};
|
||||
/*! \brief configure the per-interrupt handler
|
||||
*
|
||||
*/
|
||||
void configure_irq(size_t irq_num, function_ptr_t handler, unsigned char prio=1) {
|
||||
g_ext_interrupt_handlers[irq_num] = handler;
|
||||
// Priority must be set > 0 to trigger the interrupt.
|
||||
PLIC_set_priority(&g_plic, irq_num, prio);
|
||||
// Have to enable the interrupt both at the GPIO level, and at the PLIC level.
|
||||
PLIC_enable_interrupt(&g_plic, irq_num);
|
||||
}
|
||||
|
||||
static void msi_interrupt_handler(){
|
||||
printf("INterrupt handler call\n");
|
||||
}
|
||||
|
||||
/*!\brief initializes platform
|
||||
*
|
||||
*/
|
||||
void platform_init(){
|
||||
// UART init section TODO: clarify how to get the functions from init.c?
|
||||
GPIO_REG(GPIO_IOF_SEL) &= ~IOF0_UART0_MASK;
|
||||
GPIO_REG(GPIO_IOF_EN) |= IOF0_UART0_MASK;
|
||||
UART0_REG(UART_REG_TXCTRL) |= UART_TXEN;
|
||||
|
||||
F_CPU=PRCI_measure_mcycle_freq(20, RTC_FREQ);
|
||||
printf("core freq at %d Hz\n", F_CPU);
|
||||
// initialie interupt & trap handling
|
||||
write_csr(mtvec, &trap_entry);
|
||||
|
||||
PLIC_init(&g_plic, PLIC_CTRL_ADDR, PLIC_NUM_INTERRUPTS, PLIC_NUM_PRIORITIES, 0);
|
||||
// Disable the machine & timer interrupts until setup is done.
|
||||
clear_csr(mie, MIP_MEIP);
|
||||
clear_csr(mie, MIP_MTIP);
|
||||
for (auto& h:g_ext_interrupt_handlers) h=no_interrupt_handler;
|
||||
configure_irq(2, msi_interrupt_handler);
|
||||
// Enable interrupts in general.
|
||||
set_csr(mstatus, MSTATUS_MIE);
|
||||
// Enable the Machine-External bit in MIE
|
||||
set_csr(mie, MIP_MEIP);
|
||||
}
|
||||
|
||||
bool double_equals(double a, double b, double epsilon = 0.001)
|
||||
{
|
||||
return std::abs(a - b) < epsilon;
|
||||
@@ -92,11 +20,12 @@ void run_xspn() {
|
||||
spn::mode_reg() = 0;
|
||||
spn::input_length_reg() = 100; // each sample consists of 5 uint8 values
|
||||
spn::input_addr_reg() = 0x800C0000;
|
||||
spn::output_addr_reg() = 0x8001C000;
|
||||
spn::output_addr_reg() = 0x800A0000;
|
||||
spn::num_of_in_beats_reg() = 8; // Number of AXI4 burst beats needed to load all input data
|
||||
spn::num_of_out_beats_reg() = 13; // Number of AXI4 burst beats needed to store all result data
|
||||
spn::start_reg() = 1;
|
||||
delayUS(50);
|
||||
|
||||
wait_for_interrupt();
|
||||
spn::interrupt_reg() = 1;
|
||||
}
|
||||
|
||||
@@ -107,8 +36,9 @@ int main() {
|
||||
platform_init();
|
||||
spn::mode_reg() = 1;
|
||||
spn::start_reg() = 1;
|
||||
printf("READOUT HW:0x%x\n", spn::readout_reg());
|
||||
wait_for_interrupt();
|
||||
spn::interrupt_reg() = 1;
|
||||
printf("READOUT HW:0x%x\n", spn::readout_reg());
|
||||
|
||||
for (int k = 0; k < 10000; k+=100) {
|
||||
// write input samples into the memory
|
||||
@@ -126,7 +56,7 @@ int main() {
|
||||
run_xspn();
|
||||
|
||||
// read calculation results from the memory
|
||||
double * res_base = (double*) 0x8001C000;
|
||||
double * res_base = (double*) 0x800A0000;
|
||||
|
||||
for (int i = 0; i < 100; i++) {
|
||||
if (!double_equals(res_base[i] * ln2, ref_data.at(k+i))) {
|
||||
|
||||
Reference in New Issue
Block a user