mirror of https://github.com/efabless/caravel.git
111 lines
4.3 KiB
Python
111 lines
4.3 KiB
Python
from curses import baudrate
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import random
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import cocotb
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from cocotb.triggers import FallingEdge,RisingEdge,ClockCycles,Timer,Edge
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import cocotb.log
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from interfaces.cpu import RiskV
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from interfaces.defsParser import Regs
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from cocotb.result import TestSuccess
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from tests.common_functions.test_functions import *
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from tests.bitbang.bitbang_functions import *
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from interfaces.caravel import GPIO_MODE
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from interfaces.common import Macros
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bit_time_ns = 0
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reg = Regs()
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@cocotb.test()
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@repot_test
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async def debug(dut):
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caravelEnv,clock = await test_configure(dut,timeout_cycles=33840)
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cpu = RiskV(dut)
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cpu.cpu_force_reset()
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cpu.cpu_release_reset()
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# calculate bit time
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clk = clock.period/1000
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global bit_time_ns
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bit_time_ns = round(10**5 * clk / (1152))
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cocotb.log.info(f"[TEST] bit time in nano second = {bit_time_ns}")
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caravelEnv.drive_gpio_in((0,0),1) # IO[0] affects the uart selecting btw system and debug
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caravelEnv.drive_gpio_in((5,5),1)
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# wait for start of sending
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await wait_reg1(cpu,caravelEnv,0XAA)
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# caravelEnv.drive_gpio_in((0,0),1) # IO[0] affects the uart selecting btw system and debug
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cocotb.log.info(f"[TEST] Start debug test")
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# send random data to address 30'h00400024 and expect to recieve the same data back it back
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dff_address = random.randint(0x00000400, 0x00000600) & 0xFFFFFFFC
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data = random.getrandbits(32)
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address = dff_address >>2 # address has to be shifted
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# data = 0xFFFFFFF0
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cocotb.log.info (f"[TEST] Executing DFF2 write address={hex(dff_address)} data = {hex(data)}")
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await wb_write(caravelEnv,address,data)
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receieved_data = await wb_read(caravelEnv,address)
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if data != receieved_data:
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cocotb.log.error(f"[TEST] DFF2 reading failed from address {hex(address)} expected data = {hex(data)} recieved data = {hex(receieved_data)}")
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else:
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cocotb.log.info(f"[TEST] PASS: DFF2 reading right value {hex(data)} from {hex(address)} ")
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async def start_of_tx(caravelEnv):
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while (True): # wait for the start of the transimission it 1 then 0
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if (caravelEnv.monitor_gpio((6,6)).integer == 0):
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break
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await Timer(bit_time_ns, units='ns')
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await Timer(bit_time_ns, units='ns')
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async def uart_send_char(caravelEnv,char):
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cocotb.log.info (f"[uart_send_char] start sending on uart {char}")
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#send start bit
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caravelEnv.drive_gpio_in((5,5),0)
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await Timer(bit_time_ns, units='ns')
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#send bits
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for i in range(8):
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caravelEnv.drive_gpio_in((5,5),char[i])
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await Timer(bit_time_ns, units='ns')
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# stop of frame
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caravelEnv.drive_gpio_in((5,5),1)
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await Timer(bit_time_ns, units='ns')
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async def uart_get_char(caravelEnv):
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await start_of_tx(caravelEnv)
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char = ''
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for i in range (8):
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char = caravelEnv.monitor_gpio((6,6)).binstr + char
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await Timer(bit_time_ns, units='ns')
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cocotb.log.info (f"[uart_get_char] recieving {char} from uart")
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return char
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async def wb_write(caravelEnv,addr,data):
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addr_bits = bin(addr)[2:].zfill(32)[::-1]
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data_bits = bin(data)[2:].zfill(32)[::-1]
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cocotb.log.debug(f"[TEST] address bits = {addr_bits} {type(addr_bits)}")
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await uart_send_char(caravelEnv, '10000000') # write cmd
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await uart_send_char(caravelEnv, '10000000') # size
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await uart_send_char(caravelEnv, addr_bits[24:32])
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await uart_send_char(caravelEnv, addr_bits[16:24])
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await uart_send_char(caravelEnv, addr_bits[8:16])
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await uart_send_char(caravelEnv, addr_bits[0:8])
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await uart_send_char(caravelEnv, data_bits[24:32])
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await uart_send_char(caravelEnv, data_bits[16:24])
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await uart_send_char(caravelEnv, data_bits[8:16])
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await uart_send_char(caravelEnv, data_bits[0:8])
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async def wb_read(caravelEnv,addr):
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addr_bits = bin(addr)[2:].zfill(32)[::-1]
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await uart_send_char(caravelEnv, '01000000') # read cmd
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await uart_send_char(caravelEnv, '10000000') # size
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await uart_send_char(caravelEnv, addr_bits[24:32])
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await uart_send_char(caravelEnv, addr_bits[16:24])
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await uart_send_char(caravelEnv, addr_bits[8:16])
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await uart_send_char(caravelEnv, addr_bits[0:8])
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data_bits = await uart_get_char(caravelEnv)
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data_bits += await uart_get_char(caravelEnv)
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data_bits += await uart_get_char(caravelEnv)
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data_bits += await uart_get_char(caravelEnv)
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return int(data_bits,2)
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